Journal articles on the topic 'Iron ore quality control'
To see the other types of publications on this topic, follow the link: Iron ore quality control.
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 journal articles for your research on the topic 'Iron ore quality control.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.
1
Azaryan, V. A. "Quality control and management of ore flows at the iron-ore mining processing plants." Jornal of Kryvyi Rih National University, no. 45 (2017): 159–64. http://dx.doi.org/10.31721/2306-5451-2017-1-45-159-164.
Full text
2
Azaryan, V. A. "Quality control and management of ore flows at the iron-ore mining processing plants." Jornal of Kryvyi Rih National University, no. 46 (2018): 159–64. http://dx.doi.org/10.31721/2306-5451-2018-1-46-159-164.
Full text
3
Liu, Wen Sheng, and Fu Ping Li. "Iron Ore Blending Based on Linear Programming." Applied Mechanics and Materials 443 (October 2013): 657–61. http://dx.doi.org/10.4028/www.scientific.net/amm.443.657.
Full textAbstract:
Ore Blending is an important problem that the majority of mining enterprises have to face. To solve the ore blending problem, the production plan should be made firstly, and then small adjustments should be made in according to the actual condition. By effective control and management, the balance of ore quality and stability will be realized. This paper introduced the linear programming and the concept of ore blending. A mathematical model is established by linear programming, solving the problems about ore blending of multi-seam mining in iron Mine of Tangshan hebei minging Ltd., giving the countermeasure aiming at the problem, realizing the effective management and control of ore quality. Preface In mine enterprises ore Blending is mixxing different grade ore evenly in a planned way in mining and shipment process, according to the existing resources and production capacity, according to the relevant indicators, to ensure that the final ore quality standard (such as ore grade, reserves, etc.) meet demand department requirements. At the same time collocating part lean ore in a planned way help to meet the industrial economic use standard, which is helpful to rational utilization of mineral resources, improve relationship between time and space for stope mining, avoid the phenomenon of pressure ore, maintain the normal production of mine to create favorable conditions. Improving the quality of the part lean ore grade help to increase the price standard and mining economic income. Linear programs arise in a variety of practical applications. It is capable of handling a variety of problems such as Portfolio [, Land consolidation optimization [, watershed management [, capacity allocation [,etc.
4
Cores, Alejandro, Luis Felipe Verdeja, Serafín Ferreira, Íñigo Ruiz-Bustinza, Javier Mochón, Jose Ignacio Robla, and Carmen González Gasca. "Iron ore sintering. Part 3: Automatic and control systems." DYNA 82, no. 190 (May 11, 2015): 227–36. http://dx.doi.org/10.15446/dyna.v82n190.44054.
Full textAbstract:
The sintering process involves a large number of parameters, more than 500, each of which exerts a greater or lesser influence and needs to be controlled, within the possible limits, in order to optimise productivity, process stability, and standardise the composition and quality of the sinter produced. To comply with environmental legislation, a pollution control system must monitor the particle matter and gases generated and emitted into the atmosphere by the sinter plant. Automation and control systems are vital tools to assist plant operators in the monitoring of each stage of the sinter production process.
5
Webster, Nathan A. S., Mark I. Pownceby, Natalie Ware, and Rachel Pattel. "Predicting iron ore sinter strength through partial least square regression (PLSR) analysis of X-ray diffraction patterns." Powder Diffraction 32, S2 (October 26, 2017): S66—S69. http://dx.doi.org/10.1017/s0885715617001038.
Full textAbstract:
The decrease in quality of Australian iron ore, coupled with the demand for more efficient energy use, means that closer monitoring and optimisation of process conditions for iron ore sinter production is required. Here, the suitability of using partial least-squares regression analysis of powder X-ray diffraction data, collected for iron ore sinter samples, for the prediction of iron ore sinter strength has been further assessed. In addition, a preliminary assessment of the effect of 2θ range on the quality of prediction has been made. For the purposes of process control, the level of correlation between predicted strength and actual sinter strength would inform an operator whether or not the process was operating within the acceptable limits, or whether there was a potential problem requiring further investigation or rapid intervention. Reducing the 2θ range was found to reduce the level of correlation between predicted and actual strength, to a point where the particular analysis may no longer be suitable for process control.
6
Belkova, A. I., I. G. Muravyeva, and A. S. Skachko. "Methods for choosing a rational composition of the blast furnace charge." Fundamental and applied problems of ferrous metallurgy, no. 32 (2018): 47–63. http://dx.doi.org/10.52150/2522-9117-2018-32-47-63.
Full textAbstract:
The aim of the work is to solve the problem of choosing the optimal composition of iron ore materials for blast furnace loading. An analytical review of the existing approaches to assessing the quality and methods for selecting a rational composition of iron ore materials implemented as part of the control system of domestic and foreign blast furnaces in modern conditions has been carried out. A method of modeling the processes of directional formation of melts, developed at the Iron and Steel Institute, is proposed. The description of the processes of transformation of iron ore materials in a blast furnace and the properties of liquid smelting products was carried out using the parameters of interatomic interaction in melts. The technique uses a set of integral criteria and physicochemical models that allow estimating charge, gas-dynamic and temperature melting conditions. The influence of the quality of iron ore on the properties of primary melts and final products of blast-smelting is analyzed. An integral indicator of the quality of the charge and an integral indicator of the temperature blast mode have been developed. The main difference of the proposed approach to the selection of the composition of the charge from similar developments focused on the traditional criterion «basicity of the final slag» is the use of a set of physico-chemical criteria that characterize the quality and properties of iron ore, primary and final blast furnace slag. The use of the developed prognostic models and criteria as part of automated blast furnace control systems allows us to predict the chemical composition of iron and slag. Stabilization of slag properties within the specified limits ensures the smelting of cast iron of the required composition and a reduction in coke consumption in the current unstable conditions of smelting iron.
7
Azaryan, Albert, Annait Trachuk, Alexandr Shvydkyi, Alexey Melnik, and Oleg Mazhanov. "Selection of gamma-ray source for operational quality control of mineral raw materials." IOP Conference Series: Earth and Environmental Science 970, no. 1 (January 1, 2022): 012022. http://dx.doi.org/10.1088/1755-1315/970/1/012022.
Full textAbstract:
Abstract For operational and quality control of ferrous metal ores, ionizing radiation sources are used, which main characteristics are energy, activity and half-life. The technological parameters of the sources Americium-241, Thulium-170 and Cadmium-109 have been compered, and Americium-241 with an energy of 60 keV and a half-life of 458 years has been selected. Laboratory studies of the dependence of the integrated flux of scattered gamma rays on the content of total iron in the ore have been carried out. Based on the results of laboratory studies, the sensitivity and measurement cycle time have been determined for three gamma-ray sources. For all three indicators, Americium-241 has been selected for operational and quality control of ferrous metal ores. Obtained data have been used for the development and implementation of a microprocessor-based system for operational control of the total iron content in ore on a conveyor belt.
8
Аzarian, Albert А., and Wolodymyr А. Аzarian. "Geophysical methods for controlling the useful component content as the basis for the quality management system at mining and processing enterprises." Journal of Geology, Geography and Geoecology 29, no. 1 (April 8, 2020): 3–15. http://dx.doi.org/10.15421/112001.
Full textAbstract:
The article is devoted to substantiating the possibility of creating a common quality management system for iron ore plants based on geophysical methods of operational quality control for mineral raw materials. Due to the fall in prices on the world markets of iron ore raw materials, the financial and economic situation of the mining and processing enterprises in Ukraine has significantly worsened. Thus, the problem of effective control and quality management in mining has become of maximum importance. The availability of timely and reliable information about the content of the useful component will allow responding quickly, forming an integrated final ore cargo flow of the plant of exact quality required by the mining and concentration complex. The need to create a common quality management system is dictated by the fact that the iron ore has a heterogeneous distribution of the useful component content within the deposit, the extraction and transport equipment operates irregularly, resulting in ore cargo flows of various degrees of integration have significant amplitude and frequency oscillations, both by quality and quantity indicators. The instability of the useful component content in the ore cargo, which is aimed at enrichment, leads to a decrease in concentrate output, increase of losses in the tails, costs increase, decrease of the enterprise profit and decrease of its competitiveness. The mathematical model of ore cargo flow formation, which has a range of limitations on quality characteristics, is given. The structure and functional scheme of the quality management system of the mining and processing plant are substantiated. As a result of theoretical studies, the possibility of using radiometric and magnetometric methods for the operational quality control of the iron ore raw materials in the conditions of mining and processing plants by geophysical devices developed by the staff of the problem-branch laboratory of the Kryvyi Rih National University and Rudpromheofizyka LLC is substantiated. The basic technological characteristics of devices and systems are given, information on their introduction into production is provided. It is concluded that the researches carried out and the devices introduced on their basis have created objective prerequisites for substantiating the quality management system at mining and processing plants. The devices and operational control systems based on geophysical methods allow to cover all major stages of mining and processing, to receive timely and reliable information on the condition and dynamics of changes in the useful component content, to efficiently quality management at mining and processing plants, to increase the enterprises competitiveness and profitability.
9
Халапян, С. Ю., and А. О. Анпилов. "DEVELOPMENT OF A MODEL OF THE IRON ORE CONCENTRATE DEWATERING PROCESS." СИСТЕМЫ УПРАВЛЕНИЯ И ИНФОРМАЦИОННЫЕ ТЕХНОЛОГИИ, no. 4(86) (December 30, 2021): 18–22. http://dx.doi.org/10.36622/vstu.2021.86.4.004.
Full textAbstract:
Исследование направлено на разработку адаптивной системы автоматического управления процессом обезвоживания железорудного концентрата, от протекания которого зависит производительность передела, качество и себестоимость выходного продукта данного процесса и дальнейших переделов. The research is aimed at developing an adaptive system for automatic control of the iron ore concentrate dewatering process, on the course of which the processing productivity, quality and cost of the output product of this process and further processing depends.
10
Zhu, Ming, Jin Long Sun, Wen Sheng Liu, Ai Xia Zhang, Hui Zhi Zhou, Li Xin Ai, Ji Huan Peng, Yun Xi Jia, and Lei Wang. "Mining Plan Optimization Based on Linear Programming in Shirengou Iron Mine." Advanced Materials Research 429 (January 2012): 206–9. http://dx.doi.org/10.4028/www.scientific.net/amr.429.206.
Full textAbstract:
Faced with the difficult situation of the joint operation of open pit and underground mining in transition period in Shirengou Iron Mine, a suitable linear programming mathematical model of mining plan was established and synthesis optimization results were obtained, which would increase the overall economic effect of the mining operation during the transition period, while the limited reserves and ore quality control were entirely considered. A pronounced economic benefit was achieved by the project optimization. This mathematical model can be widely used in mining process to control the quality and quantity equilibrium of ore output, comprehensive utilize some waste rock and optimize the mining plan.
11
Azarian, Volodymyr. "METHOD OF DISCRETENESS SUBSTANTIATION OF QUALITATIVE CHARACTERISTICS TESTING DURING IRON ORE RAW MATERIALS EXTRACTION." Global Prosperity 2, no. 1 (July 25, 2021): 3–10. http://dx.doi.org/10.46489/gpj.2021-1-2-1.
Full textAbstract:
The article aims to substantiate the periodicity of the definition of the maintenance of a valuable component in faces. Information about the content of the valuable component is necessary to comply with the requirements of the enrichment complex while ensuring the process of the total cargo flow formation. Traditionally, in iron ore quarries, technical control services measure the content of the valuable component every shift, but the testing period requires determination. We aimed to justify the period of testing the quality characteristics of iron ore. To achieve the aim, we explored the quarry № 3 of the PJSC "ArcelorMittal Kryvyi Rih" Mining Department based on the provisions of the mining theory and using mathematical modelling and mathematical statistics methods. We developed a method of substantiating the period of testing the qualitative characteristics of the faces, which we checked based on data from the existing enterprise. Using our method, we proved the possibility of increasing the test period without losing the necessary information about the iron content and without reducing the quality characteristics of the formed final ore flow. Increasing the test period will help companies decrease costs by reducing the number of visits of technical control specialists to test the quarry face. The proposed technique can be helpful to any mining company that supports the data collection and maintain the statistical database of measurements of the valuable component content
12
Qie, Junmao, Chunxia Zhang, Haifeng Wang, Yuhua Guo, and Shengli Wu. "Investigation of a granule structure that focused on reducing NOx emissions in sintering process." Metallurgical Research & Technology 116, no. 3 (2019): 315. http://dx.doi.org/10.1051/metal/2018127.
Full textAbstract:
The pressure to reduce NOx emissions in iron ore sintering process is enlarging increasingly. The paper proposed a sintering granulation method to reduce NOx emissions. The main character of the method was to wrap all fuel on the surface of the pellet, and also increased the contact between iron ore and fluxes. The sinter-pot test results showed that NOx emissions of the method reduced by 19.9% and sinter quality improved, while SO2 emissions increased by 17.7% compared with that of the conventional method. The increase in the reducing atmosphere of the sinter bed and the development of calcium ferrite in sinter were the main causes of NOx emissions reduction and the improvement of the sinter quality. In addition, the promotion of the combustion of fuel resulted in the increase in SO2 emissions. The improvement of the sinter quality and the control of the sintering flue gas pollutants can also be realized through adjusting the distribution of fuel, fluxes and iron ore in the pellet reasonably.
13
Kosenko, Andrii, and Andrii Khorolskyi. "DETERMINATION OF DEPENDENCE OF GEOMETRIC PARAMETERS OF DRAWN STOPES (UNDERCUTS) FOR IMPLEMENTING TECNOLOGIES OF ACTIVE CONTROL OF MOUNTAIN MASSIF STATE." Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, no. 1-2 (2022): 8–19. http://dx.doi.org/10.31474/2415-7902-2022-1(8)-2(9)-8-19.
Full textAbstract:
Purpose. Increasing the efficiency of mining of rich iron ores by sublevel caving methods based on the development of the technology of active control of the state of a mountain massif, which will ensure the stability of the outcrops of exposure of drawn stopes (undercuts)and the quality of the mined ore mass. Methodology. To achieve the goal, a complex of modern research methods has been used, which includes the analysis of literary sources, design and construction documentation and practice of developing iron ore deposits at great depths, theoretical generalization of laboratory and industrial experiments, the method of functional characteristics for determining the permissible sizes of structural elements of underground mining methods, systemic economic, graph-analytical and correlation analysis. Results. It has been established that the volumes of drawn stopes (undercuts) with flat inclined and vertical exposures are characterized by a larger volume than those with flat horizontal and vertical exposures. Also, the maximum possible stable parameters are determined for the exposure of the drawn stopes (undercuts), which are formed with the help of smooth blasting. Scientific novelty. Reserves for increasing the efficiency of extraction of rich iron ores by the sublevel caving methods have been determined based on the study of the dependences of geometric parameters of the depth of drawn stopes (undercuts) and the intensity of stoping. Due to substantiation of the above parameters, the intensification of the processes of stoping is carried out, which is an integral part of the active control of the state of a rock massif during underground mining of iron ore deposits. Practical significance. The developed technological solutions allow to increase the volume of pure ore extraction by 5–51%, depending on the mining-geological, mining-technical and geomechanical conditions of the development of rich iron ore deposits and the intensity of stoping and, as a result, to reduce losses by 2.6–4.6% and ore weakening by 2.8–5.2%, to improve absolute quality of the extracted ore mass by 0.8–1.5%, and to increase the economic efficiency of the development of mining units by10.1–27.5%. Conclusions. It has been established that during the development of deposits of rich iron ores with a strength coefficient of f=4–6, an average and below average stability and a thickness of 15–40 m, which are concentrated in the depth range of 1200–1400 m, it becomes possible to form exposure of drawn stopes (undercuts) with a volume of up to 70% of the main stock of the stoping panel, with an increase in the intensity of the technological process of ore drawingup to 8.8 t/m2 per day.
14
Azaryan, A. A., A. N. Gritsenko, A. A. Trachuk, V. M. Serebrenikov, and D. V. Shvets. "Model of absorbed gamma radiation in the interaction with rock formation." IAES International Journal of Robotics and Automation (IJRA) 8, no. 4 (December 1, 2019): 269. http://dx.doi.org/10.11591/ijra.v8i4.pp269-276.
Full textAbstract:
The article discusses issues of improving the accuracy of operational quality control of iron ore in mountain ranges. There was proposed the use of the absorbed gamma radiation indicator as an improvement of the nuclear physics method for determining the iron content in ore mass are proposed. There were obtained the relationships of the sensitivity of the absorbed gamma radiation intensity on the distance between the detector and the irradiated surface, as well as on the distance between the source and the detector of gamma radiation.
15
König, Uwe, Thomas Degen, and Nicholas Norberg. "PLSR as a new XRD method for downstream processing of ores: – case study: Fe2+ determination in iron ore sinter." Powder Diffraction 29, S1 (November 17, 2014): S78—S83. http://dx.doi.org/10.1017/s0885715614001109.
Full textAbstract:
The use of high-speed detectors made X-ray diffraction (XRD) become an important tool for process control in mining and metal industries. Decreasing ore qualities and increasing prices for raw materials require a better control of processed ore and a more efficient use of energy. Traditionally quality control of iron ore sinter has relied on time-consuming wet chemistry. The mineralogical composition that defines the physical properties such as hardness or reducibility is not monitored. XRD analysis in combination with Rietveld quantification and statistical data evaluation using partial least-squares regression (PLSR) has been successfully established to determine the mineralogical composition and the Fe2+ content of iron ore sinter within an analysis time of less than 10 min per sample. A total of 35 iron ore sinter samples were measured and evaluated using PLSR and the Rietveld method. The results were compared with wet chemistry data. PLSR results show accuracy for the Fe2+ content of ±0.14%. No pure phases, crystal structures, or complex modeling of peak shapes are required. The Rietveld method was used to quantify the total phase composition of the samples. The Fe2+ content could be calculated from all phases present. Both methods take the full XRD pattern into account and can be simultaneously applied on the same measurement. PLSR was found to be the more robust method if only Fe2+ results are required. The Rietveld method helps predict other parameters such as the compressional strength of the sinter by monitoring all existing phases (e.g., larnite, C2S, or silico-ferrite of calcium and aluminum phases).
16
Azaryan, Albert, Andrey Gritsenko, Annait Trachuk, and Dmitriy Shvets. "Development of the method to operatively control quality of iron ore raw materials at open and underground extraction." Eastern-European Journal of Enterprise Technologies 5, no. 5 (95) (October 31, 2018): 13–19. http://dx.doi.org/10.15587/1729-4061.2018.144003.
Full text
17
Chen, You Wen, and Tian You Chai. "Optimal Control for Quality Indices of Heat Furnace." Advanced Materials Research 201-203 (February 2011): 1748–51. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.1748.
Full textAbstract:
Heat furnace is one of the most important parts in iron and steel industry which is one of the basic industries. The control of furnace quality indices has a direct impact on iron and steel qualities and energy consumptions in an iron and steel manufacturing process. Due to dramatic changes of exhaust gas in combustion, this multi-variable process becomes time-varying, and also has inherent nonlinearities, couplings among the variables, large inertias and time delays.Therefore, manual operations are still being widely used in quality indices control. In this paper, an optimization control method is proposed for the control of furnace quality indices. The optimization consists of a materials temperature calculation model, an optimization objective, an ideal materials heating model and a furnace heating model. Optimization algorithm consists of the maximum principle, the simulated annealing algorithm，the iterative algorithm and sensitive analysis.Finally, quality indices were controlled by lower layer loop control on-line.The proposed optimization control method has been successfully applied to some steel plants. The industrial applications show the effectiveness of the proposed method.
18
Morkun, Vladimir, Natalia Morkun, Vitaliy Tron, Olga Porkuian, Oleksandra Serdiuk, and Tetiana Sulyma. "Application of Magnetic and Ultrasonic Methods for Determining Parameters of Ferromagnetic Components in Iron Ore Slurry Flows." Acta Mechanica et Automatica 15, no. 4 (November 29, 2021): 193–200. http://dx.doi.org/10.2478/ama-2021-0025.
Full textAbstract:
Abstract The article considers the method for controlling the ferromagnetic component content in slurry flow by ultrasonic and magnetic measurements. One of the basic factors determining the efficiency of magnetic separators at iron ore concentration plants is the quality of distribution of the ground ore into the product containing the ferromagnetic component and the waste rock. Due to the fact that in most cases, magnetic separators extract minerals with strongly magnetic properties, it is essential to find the magnetic component content in the input ore and products of its distribution in order to improve control over the technological process. Currently, low accuracy and reliability make existing means of operative control over the ferromagnetic component content in the slurry flow inefficient. Density of slurry is one of the primary disturbing factors affecting the accuracy of measurements, and this fact determines the necessity of measuring this parameter while controlling the ferromagnetic component content. Combined methods of measurements are a promising trend in designing sensors of useful component content in the slurry flow. The article describes the method for controlling the ferromagnetic component content in slurry flow by ultrasonic and magnetic measurements.
19
Jiang, Wen Li, Yi Min Zhang, Guang Quan Liang, and Xi Wen Xia. "Development and Application of Complex Flashing-Field Magnetic Cleaner." Advanced Materials Research 1073-1076 (December 2014): 2177–88. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.2177.
Full textAbstract:
In order to enhance the quality of iron concentrate from magnetic separation, reverse-flotation technology is often applied in iron ore dressing plant. However, this technology has disadvantages in operating cost, energy consumption and environmental protection (Zhao Chunfu, Wu Jianghua &Wang Hui ,2005). Developing innovative equipment to process magnetite ore more-effectively is a way to get rid of these disadvantages of reverse flotation and improve the quality of iron concentrate. This paper describes the development of Complex Flashing-Field Magnetic Cleaner, a new kind of equipment based on the principle of combination of separation in magnetic field and separation in gravity field (Hao Shuhua & Jiang Wenli,2002). This innovative equipment possesses a tailor-made magnetic system and has the characteristics of a magnetic field which can strengthen the formation of magnetic agglomerations and the dispersion of gangue minerals to improve the quality of separation. The automatic control system developed specifically for this equipment can further increase the accuracy of separation and stabilize the process. Test results showed that this equipment is reliable in operation, economically beneficial and it has large potential of application.
20
Roy, Jonathan, Claude Bazin, and Faïçal Larachi. "Simulation Algorithm for Water Elutriators: Model Calibration with Plant Data and Operational Simulations." Minerals 12, no. 3 (March 1, 2022): 316. http://dx.doi.org/10.3390/min12030316.
Full textAbstract:
A dynamic simulation algorithm based on 1-D transient convection/diffusion transport per particle size class is proposed to simulate a hydraulic classifier operated to selectively remove quartz from an iron oxide concentrate produced by processing the ore from an iron ore mine in northeastern Canada. The calibrated model is used to simulate the operation of dense bed hydraulic classifiers of different sizes and/or under different operating conditions. The simulator predicts the behavior and characteristics of the pulp at different depths within the classifier as a function of time. The simulator is validated by confronting the simulation results to experimental data obtained from sampling industrial and laboratory classifiers. The simulator is then used to assess the role of the fluidization or teeter water and of bed density on the quality of the produced separation of quartz from the valuable iron oxide of the processed ore. The knowledge acquired in the noise-free environment of simulation provides clues on the way to manipulate the hydraulic classifier operating variables in a process control strategy for an industrial scale unit.
21
Kompaniets, Maria, Andrey Plakhin, Maria Selezneva, Tatiana Kochergina, and Maria Khokholush. "Analysis of the scientific and technical level of production and the introduction of innovation technologies in the ore-dressing plant." E3S Web of Conferences 208 (2020): 03018. http://dx.doi.org/10.1051/e3sconf/202020803018.
Full textAbstract:
The process of obtaining iron ore at ore-dressing plant is a continuous process, so equipment failure at any stage leads to equipment downtime at all other stages. In this case, temporary shipment to the warehouse and from the warehouse of semi-finished raw materials leads to an increase in cost and a decrease in the quality of raw materials. These problems determined the purpose and objectives of the study of the possibilities of using a geographic information system to control moving objects in the main mine of the ore-dressing plant based on the system of automatic positioning using GPS or GPS/AVL (Automatic Vehicle Location). Based on satellite data, it is possible to generate various types of reports that allow to better control the situation - to analyze the qualitative and quantitative side of the ore mining process in quarries, to simulate the situation in order to avoid loss of working time. The basis of the study determined the economic effect of the introduction of GPS navigation in the main mine of the plant.
22
Sinchuk, I., A. Kupin, and V. Baranovskyi. "ON TACTICS OF DEVELOPING ARCHITECTURE OF THE GENERALIZED ALGORITHM OF ENERGY-ORIENTED POWER CONSUMPTION CONTROL AT IRON ORE UNDERGROUND MINING COMPANIES." Electromechanical and energy saving systems 1, no. 53 (March 25, 2021): 51–63. http://dx.doi.org/10.30929/2072-2052.2021.1.53.51-63.
Full textAbstract:
Purpose. The article substantiates and confirms the thesis about the need for energy-oriented power consumption control levels in power complexes: the system of power supply at iron ore underground mining enterprises on the basis of experiment data analysis. Methodology. It is estimated that along with the current positive trend suitable for developing architecture of power consumption control levels when a limited number of energy-intensive enterprises consume about 80 % of the total power produced, their functioning modes in day hours vary. Analysis of varied realtime modes of power consumption in hours indicates absence of enterprises’ control over this process. Results. The suggested methods enable forecasting efficiency of power consumption control in hours in any variant of time-of-day tariff integration. In non-standard and changeable conditions of technological parameters in mining production, on the basis of the results of stochastic optimization analysis, it is proven that even when applying a small number of iterations N = 10, it is possible to improve the initial solution by over 60 % (the initial value of the objective function is I* = 27.7 and the final value on the last iteration is I* = 10.7). There are determined required vectors to specify a connection of the time-of-day tariff of ore mining (Р*) and the corresponding power consumption (Е*) which corresponds to the suboptimal value of the objective function (I*). The obtained results can be applied to developing recommendations for a more efficient planning of an enterprise’s performance. Practical value. The suggested algorithm implemented in power consumption control systems enables receiving a final result with any quality required for the level. If the quality of the obtained results needs improving, the number of iterations is to be increased by two or three orders of magnitude.
23
Resende, Lincoln Ribeiro Maia de, Waldyr Lopes de Oliveira Filho, and Christianne de Lyra Nogueira. "Use of the DCP test for compaction control of staged dikes in mining tailings dams." Rem: Revista Escola de Minas 66, no. 4 (December 2013): 493–98. http://dx.doi.org/10.1590/s0370-44672013000400014.
Full textAbstract:
An alternative method for quality control of earthworks in mining tailing dams is described in this article. It is composed by a penetrometer, known by the acronym DCP (Dynamic Cone Penetrometer), and is used primarily in road construction (quality assessment of pavement layers). With this apparatus, strength measurement of superficial layers of natural and compacted soils can be performed, including mine sand tailings, in a fast and efficient manner. The instrument was successfully used in the construction control of an iron ore mining tailings staged dam in the Quadrilatero Ferrifero, in Minas Gerais State, and the results showed distinctly effective densification of the embankment compacted layers, but with a sort of irregularity in their spatial distribution. In addition, field control using the traditional core-cutter method was also performed for comparison between both techniques.
24
Hoekstra, A. C., and K. D. Maiwald. "Water Quality Control of the Andelse Maas Basin, The Netherlands, by Iron Dosing." Water Science and Technology 17, no. 4-5 (April 1, 1985): 769–80. http://dx.doi.org/10.2166/wst.1985.0178.
Full textAbstract:
The Dune Water Works of The Hague pumps yearly about 45 million cubic meters of water from the Andelse Maas Basin to the dunes for infiltration purposes. The water in the Andelse Haas Basin is strongly influenced by the Meuse river. Phosphate concentrations are so high that algal growth causes difficulties in filters and dunes. For phosphate reduction purposes, iron is dosed into the basin. Several limnological variables are monitored based on weekly measurements. A mathematical model has been developed for the description of the eutrophication in the basin. The model is time and space dependent and based on the one-dimensional dispersion-advection equation. Two separate submodels are used, one for the simulation of flow conditions and one for the algae and nutrient kinetics. The ortho-phosphate reduction is modelled as a first order process. The eutrophication model has been calibrated, verified and used for a prediction of chlorophyll-a and ortho-phosphate concentrations for the case of the shut down of the iron dosing installation. The dosing of iron appears to be a very effective way for phosphate removal. Termination of the dosing would give unacceptable high phosphate and chlorophyll-a concentrations. Present investigations are focussed upon the minimization of the amount of iron dosing.
25
Niesler, Marian, Janusz Stecko, Sławomir Stelmach, and Anna Kwiecińska-Mydlak. "Biochars in Iron Ores Sintering Process: Effect on Sinter Quality and Emission." Energies 14, no. 13 (June 22, 2021): 3749. http://dx.doi.org/10.3390/en14133749.
Full textAbstract:
The article presents results of the research on the use of chars produced during pyrolysis of residual biomass as a substitutional fuel in the iron ore sintering process. Such an approach allows to implement circular economy and industrial symbiosis to the iron and steel branches. The effect of the substitution of conventional coke breeze fuel used in sintering on final sinter quality and emission was examined. With regard to productivity, fuel consumption, and properties of the sinter it was shown that the share of tested biochars in fuel may be kept at 10, and up to 30 wt.%, depending on the biochar type. It was observed that with the use of the biochars, the content of iron oxide in the sinter decreased, which was advantageous. Moreover, the sinter obtained in the presence of biochars was characterized with better strength and abrasion than the sinter obtained with coke breeze-based fuel, improving the final product quality. The presence of biochar influenced the raw exhaust gas composition and resulted in a slight increase of organic and inorganic carbon compounds content, while the amount of sulfur oxides was noticeably decreased. It was concluded that the biochars may be applied in the sintering process at established share in the fuel stream.
26
Langer, M., and Birgit Vogel-Heuser. "Prozessstufen übergreifende Synthese eines Qualitätsmodells für Sinteranlagen von Eisenerzen (Synthesis of Plantwide Quality Prediction Systems for Iron Ore Sintering Plants)." at - Automatisierungstechnik 51, no. 1-2003 (January 2003): 30–38. http://dx.doi.org/10.1524/auto.51.1.30.18878.
Full text
27
Zhang, Ma, Liu, and Li. "Removal of Residual Element Tin in the Ferrous Metallurgy Process: A Review." Metals 9, no. 8 (July 26, 2019): 834. http://dx.doi.org/10.3390/met9080834.
Full textAbstract:
With the continuous improvement of the quality of steel for social development, high-quality iron ore resources have been gradually depleted. Meanwhile, the scrap steel reserve and recycling volume are gradually increasing, which will result in the continuous increase of the residual tin content in steel, which seriously restricts the improvement of steel quality and the circulation-utilization of scrap. Therefore, it is necessary to remove as much tin as possible in the ferrous metallurgy process. However, tin in steel cannot be effectively removed in the conventional smelting process. In this paper, the origination, the existing forms, and the content control levels of the residual tin in steel are presented, as well as the current processes of tin removal in the ferrous metallurgy process.
28
PORKUIAN, Olga, Vladimir MORKUN, Natalia MORKUN, and Irina GAPONENKO. "THE INFLUENCE OF THE CHARACTERISTICS VARIATIONS OF THE CONCENTRATING PLANT CONTROL OBJECT ON THE IDENTIFICATION RESULTS USING THE HAMMERSTEIN MODEL." Sustainable Development of Mountain Territories 13, no. 1 (March 27, 2021): 94–102. http://dx.doi.org/10.21177/1998-4502-2021-13-1-94-102.
Full textAbstract:
As a result of the identification based on the Hammerstein model of objects of the first stage of iron ore magnetic separation, the adequacy of the model is obtained. All results of the testing of the developed identification algorithms show that the subsystem of identification of the automated process control systems of processing plants based on the Hammerstein hybrid model allows to carry out satisfactory identification of objects and, as a consequence, to improve the quality of technological processes. The study of the influence of the coefficient of various typical links on the results of identification using orthogonal parallel and parallel-recursive Hammerstein models showed that these models allow considering the differences in the properties of identifiable objects adequately.
29
Gupta, Neha, Chandra Sekhar, Shaik Mahaboob Basha, Dhiraj Madhukar Kadhe, Manikanta Nallamilli, Srinivas Dwarapudi, Saurabh Kundu, Shakuntala Tudu, and Indrajit Paul. "Effect of Application of Compressive and Shear Force on Iron Ore Pellet Wet Feed on Green and Fired Pellet Quality." Mining, Metallurgy & Exploration 39, no. 2 (January 29, 2022): 805–21. http://dx.doi.org/10.1007/s42461-022-00540-0.
Full text
30
Tron, Vitalii, Oleksandr Tsokurenko, Dmytro Paraniuk, and Iryna Haponenko. "Formation of the adaptive fuzzy model of the rock geological structure for exploratory drilling." E3S Web of Conferences 123 (2019): 01037. http://dx.doi.org/10.1051/e3sconf/201912301037.
Full textAbstract:
The authors suggest an approach aimed at improving the technology, increasing energy efficiency and quality of controlling borehole drilling in mining various mineralogical-technological types of iron ore through applying a geological structure model based on data of measuring drilling parameters of a drilling rig (drilling rate, torque, energy characteristics) and rock properties on the basis of studying regularities of changing parameters of the specifically formed ultrasonic field. In rapidly changing conditions of borehole drilling, it is offered to apply a two-level adaptive optimization strategy implying a simultaneous investigation into drilling and improvement of control over this process by means of the adaptive fuzzy system.
31
Yu, Yeong-Chun. "Structure of iron furnaces during the Joseon Dynasty in Jeollabuk-do and the background of the construction of iron-producing site." Central Institute of Cultural Heritage 38 (June 30, 2022): 63–98. http://dx.doi.org/10.20292/jcich.2022.38.63.
Full textAbstract:
Of the 250 iron-producing sites distributed in the jeollabuk-do, 9 were from the Joseon Dynasty. Various remains such as smelting furnace, forging furnace, and waste place were investigated through excavation and investigation in the seasonal relics of the Joseon Dynasty. Among them, the smelting furnace is estimated to have a similar planar shape to a rectangular shape with rounded corners, and secondly, there is one discharge port on one long wall with a low terrain and about 19 small wind holes on one side of the long wall. In general, there are wind holes in the long wall opposite the discharge hole for the efficiency of the work. These melting furnaces are a type of so-called “box type furnace” and have similarities such as the planar shape and the presence of small-diameter wind holes from those of Japan, but their structures are generally different. This is intensively distributed in the southern part of the Korean Peninsula, including Chungju and Asan, and in particular, in the case of jeollabuk-do, all the smelting roads of the Joseon Dynasty surveyed so far are box type furnaces, so they are local. The produced iron is Bloomery iron, and it is highly likely that not only sand iron but also iron ore (titanium iron ore) was used as the raw material. It is believed that forging furnace was responsible for the function of refining and training-forging, which improved the quality of iron and made the tissue more dense than molding that produced the finished product. In particular, it is highly likely that it is Refining-forging, as there is a large amount of slag inside Okgye-dong Danya-ro, Namwon.
On the other hand, referring to the literature records related to iron production, some of the 250 iron production sites distributed in Jeollabuk-do are believed to have been created and operated according to the iron tax receiving system and social changes during the Joseon Dynasty. In the early Joseon Dynasty, it is thought to be deeply related to the operation of cheolso and cheoljang(steel mills), and in the case of cheoljang, it is deeply related to the Cheoljangdohoe System, which took effect in the 7th year of King Taejong(1407). In the 18th year of King Seongjong (1487), as the Cheoljangdohoe System was abolished and Gakeupchenap system(each town arrears system) was implemented, production seems to have continued around iron reserves in jeollabuk-do. In the late Joseon Dynasty, as mining development and market revitalized, private production increased, and it is estimated that "hiding and producing” was prevalent when high taxes were imposed by the government to control this. The excavated iron production sites are believed to be deeply related to private production as their operation period is concentrated in the late Joseon Dynasty. In particular, considering that most of them were built in deep valleys, it is estimated that they were created by “hiding and producing”.
32
Christidis, G. E., N. Sakellariou, E. Repouskou, and Th Markopoulos. "INFLUENCE OF ORGANIC MATTER AND IRON OXIDES ON THE COLOUR PROPERTIES OF A MICRITIC LIMESTONE FROM KEFALONIA." Bulletin of the Geological Society of Greece 36, no. 1 (January 1, 2004): 72. http://dx.doi.org/10.12681/bgsg.16573.
Full textAbstract:
The influence of organic matter and iron oxides on the colour properties of an ultra-high purity micritic limestone from Kefalonia Island containing 99.7% calcite was studied. Colouring impurities, organic matter and iron-oxide, were added in the form of a xylitic lignite and a hematite-rich Fe-ore respectively. Both impurities decrease lightness (L*) and increase deviation from perfect white diffuser (AE*ab) as well as redness and yellowness of calcite. Organic matter affects colour properties to a greater degree than iron oxides. The results obtained were used in a model, which predicts lightness and AE*ab of white limestones and marbles from their Fe2Ü3 and organic carbon content. The theoretical values of L* and AE*ab of a series of known limestones and calcific marbles obtained from this model are comparable to experimental values determined using a colourimeter. Slight deviations between theoretical and experimental values are attributed to several factors, which include the different nature of iron oxides/oxyhydroxides (goethite or/and lepidocrocite and/or amorphous Fe-oxyhydroxides instead of hematite) and organic matter (kerogene instead of xylitic lignite) present in the carbonate rocks, the different particle size of calcite and impurities in the different carbonates, to the multiphase nature of the colouring impurities used in this study and to the possible existence of other Fe-rich phases such as Fe-carbonates in the limestones. The proposed model can facilitate quality control of limestone resources used as fillers and can be extended to dolomitic rocks.
33
Boyacioglu, Hülya, and Hayal Boyacioglu. "Application of environmetric methods to investigate control factors on water quality." Archives of Environmental Protection 43, no. 3 (September 1, 2017): 17–23. http://dx.doi.org/10.1515/aep-2017-0026.
Full textAbstract:
AbstractIn the study, environmetric methods were successfully performed a) to explore natural and anthropogenic controls on reservoir water quality, b) to investigate spatial and temporal differences in quality, and c) to determine quality variables discriminating three reservoirs in Izmir, Turkey. Results showed that overall water quality was mainly governed by “natural factors” in the whole region. A parameter that was the most important in contributing to water quality variation for one reservoir was not important for another. Between summer and winter periods, difference in arsenic concentrations were statistically significant in the Tahtalı, Ürkmez and iron concentrations were in the Balçova reservoirs. Observation of high/low levels in two seasons was explained by different processes as for instance, dilution from runoff at times of high flow seeped through soil and entered the river along with the rainwater run-off and adsorption. Three variables “boron, arsenic and sulphate” discriminated quality among Balçova & Tahtalı, Balçova & Ürkmez and two variables “zinc and arsenic” among the Tahtalı & Ürkmez reservoirs. The results illustrated the usefulness of multivariate statistical techniques to fingerprint pollution sources and investigate temporal/spatial variations in water quality.
34
Lesovik, Valery S., M. Y. Elistratkin, E. S. Glagolev, V. V. Voronov, and M. V. Absimetov. "Non-Autoclaved Aerated Concrete on the Basis of Composite Binder Using Technogenic Raw Materials." Materials Science Forum 945 (February 2019): 205–11. http://dx.doi.org/10.4028/www.scientific.net/msf.945.205.
Full textAbstract:
Non-autoclaved aerated concrete certain advantages are significantly lower production organization costs and technology energy intensity due to the lack of autoclave curing, the possibility of different scales industries foundation as well as monolithic construction applications. All of this allows to solve complex problems of various purposes buildings erection, heat and noise insulation. Portland cement consumption significant reduction and material properties management can be achieved through use of composite binders containing local natural and technogenic components selected on the basis of their genesis and properties. The applicability of heavy concrete and ceramic bricks processing wastes as well as such large-tonnage extraction of iron ore as sandstones granulation selection as mineral additive for non-autoclaved aerated concrete production as well as a number of accompanying issues of the of a high-quality pore space structures formation control are considered in the present article.
35
Morga, Antonia, Chris Atzinger, Mick Arber, Sarah King, Angaja Phalguni, Alice Sanderson, and Ana Filipa Alexandre. "Overview of Systematic Reviews (SRs) of Erythropoiesis-Stimulating Agents (ESAs) As Standards of Care for Non-Myeloid Cancer Patients with Chemotherapy-Induced-Anemia (CIA)." Blood 138, Supplement 1 (November 5, 2021): 4152. http://dx.doi.org/10.1182/blood-2021-144957.
Full textAbstract:
Abstract OBJECTIVES: While chemotherapy is fundamental to the treatment of many cancers, it is associated with adverse events (AEs), including anemia. CIA is linked to many symptoms, including fatigue and cognitive impairment. Most cancer patients receiving chemotherapy experience CIA. ESAs are indicated for treatment of CIA in non-myeloid cancers. Given the extensive data available, we reviewed SRs of the existing evidence on ESAs for treatment of CIA, to assess their relative efficacy and safety. METHODS: A search for published SRs of ESAs for the treatment of CIA in adults with non-myeloid cancers was conducted across seven databases and three online resources, from inception to July 2020. Data were extracted on hemoglobin-related (Hb)-outcomes; mortality; health-related quality of life (HRQoL), iron use, red blood cell (RBC) transfusions, cancer-related outcomes, and serious AEs (SAEs) including thromboembolic events. Risk of bias was assessed by two reviewers using the Assessing the Methodological Quality of Systematic Reviews (AMSTAR) 2 tool. RESULTS: Of 1027 records assessed, 33 records met eligibility criteria; from these, 14 SRs (from 19 publications) were considered core and were extracted. The majority of SRs (n=13) were meta-analyses of randomized, controlled trials. Mortality was evaluated in 9 SRs: 5 reported no difference between ESA vs. control (best supportive care (BSC) and/or placebo and/or no treatment) and 2 reported higher mortality with ESA vs. control (standard care (no iron or oral iron) and/or placebo and/or no treatment). Cancer-related overall survival was not significantly different for ESA vs. control (BSC or placebo) in 2 SRs, or vs. no ESA treatment in 1 SR. Relapse-free, recurrence-free and progression-free survival did not differ between ESA vs. BSC, no treatment, or placebo, according to 1 SR. Two SRs reported a significantly improved change in Hb from baseline for ESA vs. placebo or BSC. Four SRs reported significantly improved hematological response (definitions varied by study) for ESA vs. control (BSC and/or placebo and/or no treatment) (Table). RBC transfusion requirements were reported for 5 treatment comparisons in 12 SRs. For 3 comparisons (ESA vs. control (BSC and/or placebo and/or no treatment); IV iron + ESA vs. standard care; and IV iron + ESA vs. no iron + ESA), there was a consistent statistically significant reduction in transfusion rates with ESA-based treatment. For 2 other comparisons, 1 SR reported no significant difference in transfusion rates with oral iron + ESA vs. no iron + ESA, and 2 SRs found no difference between darbepoetin vs. epoetin. ESA was associated with a requirement for significantly fewer RBC units per patient vs. control (BSC or placebo) in 1 SR. Functional Assessment of Cancer Therapy-Anemia (FACT-An, 6 SRs) and FACT-Fatigue (FACT-F, 7 SRs) were the only HRQoL measures reported. Two SRs reported clinically important improvements in FACT-An with ESA vs. control (BSC and/or placebo); the remaining SRs reported difficulty in interpreting results due to study heterogeneity. Five SRs reported significant improvements in FACT-F with ESA vs. control (BSC and/or placebo and/or no treatment). One SR did not present a meta-analysis, stating that FACT-F results did not differ for ESA vs. placebo groups, and 1 SR reported a significant improvement in FACT-F for IV iron + ESA vs. standard care (no iron or oral iron). Of 2 SRs reporting SAEs, 1 found no difference in incidence for IV iron + ESA vs. standard care (no iron or oral iron) and 1 found significantly greater incidence for ESA vs. no treatment. Of 6 SRs that compared ESA vs. control, 3 reported an increased risk of thromboembolic events with ESAs in the treatment of CIA and 2 reported no significant difference between treatment groups. The remaining SR reported numerically higher incidences of thromboembolic events with ESA vs. control (no statistical comparison). Several outcomes of interest were not reported, including time to first rescue therapy and supplementary iron use. Most SRs did not report on study quality. CONCLUSIONS: In all SRs reporting efficacy, there were improvements in Hb change from baseline, Hb response, and reduction in RBC transfusions for patients with CIA treated with ESAs vs. control. Results were less consistent across SRs for mortality, thromboembolic events, and HRQoL for ESA vs. control. Lack of study quality reporting may affect the strength of these findings. Figure 1 Figure 1. Disclosures Morga: Astellas Pharma Europe Ltd.: Current Employment. Atzinger: Astellas Pharma Inc.: Current Employment. Arber: York Health Economics Consortium Ltd: Current Employment. King: York Health Economics Consortium Ltd: Current Employment. Phalguni: York Health Economics Consortium Ltd: Current Employment. Sanderson: York Health Economics Consortium Ltd: Current Employment. Alexandre: Astellas Pharma Europe B.V.: Current Employment.
36
Sato, Miyuki, Ken Sato, and Akihiko Nakano. "Endoplasmic Reticulum Quality Control of Unassembled Iron Transporter Depends on Rer1p-mediated Retrieval from the Golgi." Molecular Biology of the Cell 15, no. 3 (March 2004): 1417–24. http://dx.doi.org/10.1091/mbc.e03-10-0765.
Full textAbstract:
Endoplasmic reticulum (ER) quality control is a conserved process by which misfolded or unassembled proteins are selectively retained in the endoplasmic reticulum (ER). Failure in oligomerization of multisubunit membrane proteins is one of the events that triggers ER quality control. The transmembrane domains (TMDs) of unassembled subunits are determinants of ER retention in many cases, although the mechanism of the TMD-mediated sorting of unassembled subunits remains elusive. We studied a yeast iron transporter complex on the cell surface as a new model system for ER quality control. When Fet3p, a transmembrane subunit, is not assembled with the other membrane subunit, Ftr1p, unassembled Fet3p is exclusively localized to the ER at steady state. The TMD of Fet3p contains a determinant for this process. However, pulse-chase analysis and in vitro budding assays indicate that unassembled Fet3p rapidly escapes from the ER. Furthermore, Rer1p, a retrieval receptor for ER-resident membrane proteins in the Golgi, is responsible for the TMD-dependent ER retrieval of unassembled Fet3p. These findings provide clear evidence that the ER quality control of unassembled membrane proteins can be achieved by retrieval from the Golgi and that Rer1p serves as a specific sorting receptor in this process.
37
Reichardt, Henning, Ashley Grant, Soheil Koushan, Snezana Petrovic, and Oscar Dominguez. "Implementation of a QAQC program for in-situ grade control by pulsed fast and thermal neutron activation methods." TOS Forum 2022, no. 11 (May 27, 2022): 139. http://dx.doi.org/10.1255/tosf.143.
Full textAbstract:
Following years of development and testing, in-situ chemical assay by Pulsed Fast and Thermal Neutron Activation (PFTNA) has been implemented in mining grade control at BHP Western Australian Iron Ore as a world first. Demonstrating the technical capability and aptness of a new methodology, however, is not sufficient to ensure the sustained quality of reported assay data. The success of moving from testing stage to implementation in active mining grade control, is chiefly dependent on the robustness of ongoing quality control and quality management. This paper shows the steps undertaken to achieve end to end monitoring of data acquired by Blasthole Assay Tools (BHAT) using PFTNA methods. The main challenge forin situ chemical assay by the BHAT is to design a quality assurance/quality control program (QA/QC) without a physical sample being collected, and in consequence, without the conventional separation into the focus areas sample collection, sample preparation and laboratory analysis. In this context, the BHAT combines all in one in-strument, and different ways to monitor data integrity, repeatability and accuracy need to be established as outlined below. After the validity of a BHAT calibration has been verified and a tool is in operation, data is monitored on a daily basis to check that relevant operational parameters inside the tool are working within defined acceptance limits. Measurement error in the field is monitored with repeat logs in Blastholes, and inter-instrument error by replicate logs of different BHAT units in the same Blastholes. Accuracy and instrument drift over longer periods are monitored by repeated logs in Reverse Circulation (RC) drill holes. Operational parameters, such as neutron output and spectral resolution of the instrument detector are monitored by scheduled logs in dedicated testing facilities. Also, duplicate manual sampling in Blastholes isused to compare grade populations obtained by different sampling methods in mining pits to aid grade reconciliation from mining to production. By routine application of these QA/QC steps, in conjunction with close communication of results to mining teams, the new BHAT technology has been successfully embedded in day to day mining operations.
38
McLaren, Christine E., Chad P. Garner, Clare C. Constantine, Stela Masle, Christopher D. Vulpe, Beverly M. Snively, James D. Cook, et al. "Genome-Wide Association Study Identifies Genetic Loci Associated with Iron Deficiency." Blood 114, no. 22 (November 20, 2009): 4048. http://dx.doi.org/10.1182/blood.v114.22.4048.4048.
Full textAbstract:
Abstract Abstract 4048 Poster Board III-983 Introduction Iron deficiency is the most common nutritional disorder in the world with an estimated two billion affected persons. Although commonly considered environmental in origin, the existence of multiple genetic disorders of iron metabolism in man, rodents and other vertebrates suggest a genetic contribution to iron deficiency. Methods: The Hemochromatosis and Iron Overload Screening (HEIRS) Study is a multi-center, multi-ethnic study in which transferrin saturation (TS), serum ferritin (SF), and HFE mutations were determined in 101,168 adults. To identify genomic locations associated with iron deficiency, we performed a genome-wide association study (GWAS) using DNA collected from white HEIRS Study participants who had SF ≤ 12 μg/L (cases) and an equal number of white controls (SF > 100 μg/L in men, SF > 50 μg/L in women) frequency-matched to cases by sex and geographic location. Men aged ≥ 25 y and women ≥ 50 y were included in both groups. Tissue body iron, an index of iron deficiency, was estimated from serum transferrin receptor (sTfR) and SF. Genotyping was performed with the Illumina HumanCNV370K Beadchip platform. Quality control filters excluded single nucleotide polymorphisms (SNPs) or samples with > 5% missing genotypes, SNPs showing heterozygosity or Hardy-Weinberg deviations (P<10−7), and SNPs with minor allele frequency < 0.02. Population admixture/structure was assessed using principal component analysis. Regression analysis was used to examine the association between outcomes (case-control status, tissue body iron, serum ferritin, transferrin receptor, serum iron, total iron-binding capacity [TIBC], and unsaturated iron-binding capacity [UIBC]) and each SNP genotype variable; covariates included age, sex, and geographic location. Replication for 56 SNPs was conducted in a population attending primary care clinics at a Veterans Affairs (VA) medical center using the iPlex platform. Eligibility within the VA replication population was restricted to age and self-reported white ethnicity as for the HEIRS subset from a total of 2559 people (138 women). VA participants with SF ≤ 20 μg/L were classified as iron-deficient cases and frequency matched 1:2 with controls (men with SF > 100 μg/L and women with SF > 50 μg/L). Results The GWAS genomic control parameter was not significantly different from 1.0. There were 392 cases (96 men) and 390 controls (96 men) in the HEIRS subset GWAS with average age (SD) of 59 (10) y and 61 (11) y, respectively. Geometric mean SF (minimum, maximum), and mean (SD) for sTfR and tissue body iron in the HEIRS subset were 7.5 (1.2, 12) μg/L, 6.4 (3.77) mg/kg and -2.0 (2.50) for cases and 141 (51, 881) μg/L, 3.0 (0.98) mg/kg and 10.8 (2.5) for controls. After quality control tests, GWAS analysis included genotype data for 331,060 SNPs in 734 individuals (364 cases, 370 controls). For the VA replication population there were 67 male and 11 female cases, and 136 male and 27 female controls for whom DNA was successfully prepared; the average age (SD) was 68 (12) y for cases and 65 (11) y for controls. Regression analysis identified seven SNPs within four independent regions that replicated associations found in the GWAS (GWAS P<1×10-4 and VA P<0.05).The SNP rs6735681 on chromosome 2p24 was associated with serum iron (GWAS P<3.9×10-5, VA P=0.038). Three SNPs on chromosome 2p14 (rs6750096, rs2698541 and rs2698530) significantly influenced both TIBC and UIBC (GWAS P<2.9×10-5, VA P< 0.04 for all). Two SNPs in the TF gene region on chromosome 3q22 also showed significant effects on TIBC and UIBC (GWAS P<4.7×10-6, VA P<0.03 for all). The SNP rs10512064 on chromosome 9q21 was associated with serum ferritin concentration and tissue body iron (GWAS P<2.5×10-5, VA P<0.05 for both). Conclusion: From these GWAS and replication studies, we have identified three new genetic loci and one known iron gene, TF, associated with iron phenotype variability. These results point to specific loci as targets for gene identification and TF polymorphisms as determinants of iron metabolism, which in turn may play a role in regulation of body iron status. Disclosures: No relevant conflicts of interest to declare.
39
Bellad, Asha, Radhika Kapil, and Aakriti Gupta. "National Guidelines for Prevention and Control of Iron Deficiency Anemia in India." Indian Journal of Community Health 30, no. 1 (Supp) (April 25, 2018): 89–94. http://dx.doi.org/10.47203/ijch.2018.v30i01supp.013.
Full textAbstract:
Anaemia is a serious public health challenge in India with more than 50% prevalence across vulnerable groups such as pregnant women, infants, young children and adolescents. It has adverse effects on health, physical and mental productivity affecting quality of life. Guideline is any document containing recommendations about health interventions, whether these are clinical, public health or policy recommendations. The National Anemia Prevention and control guidelines have been developed taking cognizance of the current scientific evidence. The National Iron+ Initiative guidelines have been developed by the Adolescent Division of the Ministry of Health and Family Welfare (MoHFW), Government of India. Prevention and control of anaemia is one of the key strategies of the Health, Nutrition and Population Sector Programmes for reducing maternal, neonatal and childhood mortality and improving maternal, adolescent and childhood health status. It is estimated that anaemia causes 20 per cent of maternal deaths in India.
40
Filatov, S. V., A. I. Dagman, S. V. Myasoedov, S. A. Zagainov, and L. Yu Gileva. "Application of computer training systems for qualification perfection of technological personal of blast furnace shops." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 75, no. 4 (May 18, 2019): 448–53. http://dx.doi.org/10.32339/0135-5910-2019-4-448-453.
Full textAbstract:
Effective control of thermal state of a blast furnace (BF), considerably depending on the qualification of the technological personal, is an important condition for smelting of hot metal of required composition. Application of computer training systems (CTS) in the process of education of technological personal of BF shops is one of the effective methods of professional knowledge and skill perfection. The CTS, implemented at PAO NLMK, based on a model of thermal state of BF, elaborated in Ural Federal University and supplemented with the models of existing disturbances. Adjusting of dynamic characteristics accomplished on the base of regularity of heat- and mass exchange. According to the tasks of BF heat operative control, during the training at the CTS transient processes are studied through channels of BF thermal state control, skill is mastered to identify the tendencies of BF thermal state change in case of non-controlled disturbances action. Most important stage of the training – implementation of adequate solutions to compensate declination of BF thermal state parameters from the set-up level. The CTS implemented at PAO NLMK is operating in the mode of training and testing. The main parameters of BF operation for every particular scenario are displayed at a mnemonic diagram, which completely corresponds to the mnemonic diagram of particular BF. Within the frame of transient processes dynamics studies, tasks are stipulated to modify a BF thermal state by application of control programs. When a scenario of BF thermal state control in case of non-controlled disturbances action is realized, the process parameters change is imitated at the mnemonic diagram. It will be done in case of one of the following parameters change: coke quality change, reducibility change, iron ore material grain size change, distribution of ore by radius change. The CTS includes a module of administration, which allows collecting the statistics of tasks fulfilment by pupils and estimating the results according to accepted algorithm. The application of CTS enabled to perfect the competence of technological personal, which was expressed by declining of off-grade hot metal share.
41
Ginting, Rosnani, Theresia Yosephin Batubara, and Widodo Widodo. "DESAIN ULANG PRODUK TEMPAT TISSUE MULTIFUNGSI DENGAN MENGGUNAKAN METODE QUALITY FUNCTION DEPLOYMENT." Jurnal Sistem Teknik Industri 19, no. 2 (August 18, 2018): 1–9. http://dx.doi.org/10.32734/jsti.v19i2.367.
Full textAbstract:
In human mindset changes along with the development of technology, trends and need for quality products increasingly demand the development of more complex product functions to meet the expectations of the product. Redesign the product made is a multifunctional tissue box. This product is intended for family or household needs. One of the methods that depart from consumer needs is the Quality Function Deployment commonly abbreviated as QFD. In this QFD quality control of a product based on the wants and needs of consumers. Characteristics of multifunctional tissue products obtained from the design objectives is the Multifunctional Tissue Box has a blue main function, has a main beam function, has a polkadot main function motif, has a main rectangular function hole, has a main function iron cover, has an ornament stickers, has an additional function of candy place, has additional color function pink, has additional functional stripe motifs and has additional iron functional material. Then get the best alternative with total cost Rp.75.895.
42
Yeudall, Fiona, Rosalind S. Gibson, Timothy R. Cullinan, and Beatrice Mtimuni. "Efficacy of a community-based dietary intervention to enhance micronutrient adequacy of high-phytate maize-based diets of rural Malawian children." Public Health Nutrition 8, no. 7 (October 2005): 826–36. http://dx.doi.org/10.1079/phn2005744.
Full textAbstract:
AbstractObjectiveTo evaluate the efficacy of a community-based dietary intervention to reduce risk of micronutrient inadequacies in high-phytate maize-based Malawian diets.DesignQuasi-experimental post-test design with a non-equivalent control group.SettingFour villages in Mangochi District, Southern Malawi.ParticipantsHouseholds with children aged 3–7 years in two intervention (n = 200) and two control (n = 81) villages participated in a 6-month intervention employing dietary diversification, changes in food selection patterns, and modifications to food processing to reduce the phytate content of maize-based diets. Baseline comparability between the groups was confirmed via assessment of sociodemographic characteristics, anthropometry, knowledge and practices, morbidity, haemoglobin and hair zinc. After 12 months, knowledge and practices and dietary intakes were assessed by interactive 24-hour recalls, one during the food plenty and a second during the food shortage season. Nutrient adequacy for the two groups was compared via dietary quality indicators and predicted prevalence of inadequate intakes using the probability approach.ResultsIntervention children had diets that were significantly more diverse and of a higher quality than those of controls. Median daily intakes of protein, calcium, zinc (total and available), haem iron, vitamin B12 and animal foods (grams; % of total energy) were higher (P<0.05) whereas phytate intakes, phytate/zinc and phytate/iron molar ratios were lower (P<0.01) in the intervention group; some spread of knowledge and practices to controls occurred.ConclusionsOur community-based dietary strategies reduced the predicted prevalence of inadequate intakes of protein, calcium, zinc and vitamin B12, but not iron, in children from Malawian households with very limited resources.
43
Jozdaemi, Elham, and Ahmad Golchin. "The Effects of Iron Fertilization and sulfuric acid Application in Irrigation water on Root Growth and Chemical composition of Bean cultivars in a Calcareous soil." Journal of Research in Science, Engineering and Technology 5, no. 02 (September 13, 2019): 8–13. http://dx.doi.org/10.24200/jrset.vol5iss02pp8-13.
Full textAbstract:
Legumes are main sources of plant proteins for human and animal nourishment. Beans with 20-25% protein, 55-65% carbohydrates and 1-5% lipid play a major role in nutrition of poor nations which are not able to feed ourselves with animal proteins. Thus, increasing yield and quality of beans is an effective way for reducing protein deficiency in developing countries. One of the factors that reduces yield and quality of beans in calcareous soils of Iran is iron deficiency. High pH and calcium and bicarbonate contents of calcareous soils induce leaf choruses which limits plant growth and yield and reduces the quality of beans. To determine the effects of soil and foliar applied iron fertilizers and sulfuric acid on roots of four spotted bean cultivars, a factorial experiment was conducted using a completely randomized design and three replications. The experimental factors were iron fertilizers and bean cultivars. Fertilizer factor included: (a) soil application of ferrous sulfate (25 and 50 mg/kg) and Fe-EDDHA (3 and 6 mg/kg), (b) foliar application of Fe-EDTA(1 and 2 mg/L) and ferrous sulfate (2 and 4 g/L), (3) soil application of sulfuric acid through the irrigation water (2 and 4 g/L) and (4) control (without iron fertilizer).The spotted bean cultivars used in this study were Tallash, Khomein, COS16 and a Local cultivar. The results of this experiment showed that there were significant differences between the effects of soil and foliar applied iron fertilizers and spotted bean cultivars root with respect to root dry and weights. The bean cultivars responded differently to iron fertilization and the highest and the lowest increase in root dry and weights were measured for the local and Khomain cultivars respectively . The results of the experiment showed that application of sulfuric acid by irrigation water at the rate of 4.mg/l increased the fresh and dry weight of root. The application of sulfuric acid also increased the root concentrations of N, K, P, Fe, Cu, Mn, and Zn significantly . The application of soil and foliar applied iron also increased the root concentration of Fe, K, N, P and decreased the root concentration of Cu, Zn, Mn.
44
König, Uwe, and Sabine M. C. Verryn. "Heavy Mineral Sands Mining and Downstream Processing: Value of Mineralogical Monitoring Using XRD." Minerals 11, no. 11 (November 11, 2021): 1253. http://dx.doi.org/10.3390/min11111253.
Full textAbstract:
Heavy mineral sands are the source of various commodities such as white titanium dioxide pigment and titanium metal. The three case studies in this paper show the value of X-ray diffraction (XRD) and statistical methods such as data clustering for process optimization and quality control during heavy mineral processing. The potential of XRD as an automatable, reliable tool, useful in the characterization of heavy mineral concentrates, product streams and titania slag is demonstrated. The recent development of ultra-high-speed X-ray detectors and automated quantification allows for ‘on the fly’ quantitative X-ray diffraction analysis and truly interactive process control, especially in the sector of heavy mineral concentration and processing. Apart from the information about the composition of a raw ore, heavy mineral concentrate and the various product streams or titania slag, this paper provides useful information by the quantitative determination of the crystalline phases and the amorphous content. The analysis of the phases can help to optimize the concentration of ores and reduction of ilmenite concentrate. Traditionally, quality control of heavy mineral concentrates and titania slag relies mainly on elemental, chemical, gravimetrical, and magnetic analysis. Since the efficiency of concentration of minerals in the different product streams and reduction depends on the content of the different minerals, and for the latter on the titanium and iron phases such as ilmenite FeTiO3, rutile TiO2, anatase TiO2, or the various titanium oxides with different oxidation stages, fast and direct analysis of the phases is required.
45
Barbasova, T. A. "A MULTILEVEL RESOURCE-SAVING BLAST FURNACE PROCESS CONTROL." Bulletin of the South Ural State University. Ser. Computer Technologies, Automatic Control & Radioelectronics 21, no. 1 (February 2021): 136–46. http://dx.doi.org/10.14529/ctcr210112.
Full textAbstract:
A multilevel resource-saving blast furnace process control is considered. The resource-saving control is provided for operating, adaptation, technical and economic control in the automated systems of blast-furnace processes. It is proposed to form optimal operation modes of blast furnace heating, metal charge structures, natural gas and oxygen consumption. Decisions are made using Kohonen neural networks taking into account current and planned parameters of coke quality, iron ore, raw materials and blast. At the level of operating control, the work suggests a model predictive control to improve the resource conservation indicators. The method is based on decomposition of the general problem of the process dynamics identification on particular problems: dynamic synchronization and identification of process transfer functions. At the level of adaptive control, optimal operating modes of blast furnaces are expedient to be developed with respect to blast furnace heating, structure of metal charge, natural gas and oxygen rate considering the current and planned parameters of coke, blasting. The blast furnace operating modes are suggested to be determined based on Kohonen neural networks. In evaluating the efficiency of introducing the model predictive control, the existing actual statistics of scatter of BF mode parameters should be based upon. The fact is that the introduction of model predictive control assumes no radical change of the BF melt technology. Like in all the control systems, the BF process is considered as the set control object with all its characteristics. Changing process settings, raw material content does not introduce any cardinal variation in the scatter of process characteristics. However, in this case a transient process occurs which is necessary for the control system to identify the changing conditions. The transient process is inherent to all the control systems and the blast furnace process is not an exclusion. As a result of transient process, the control system is set to the optimal mode.
46
Sweatman, Winston, and Kevin White. "MISG, mines and variability." ANZIAM Journal 63 (June 7, 2022): C43—C55. http://dx.doi.org/10.21914/anziamj.v63.17154.
Full textAbstract:
In 2016, a Mathematics-in-Industry Study Group (MISG) project considered the construction of mining sequences, that is, the process connecting ore extraction with specific orders. In particular, the meeting considered the potential for using knowledge about geological variability within the ore. This article revisits this MISG project and the approach developed for thinking about the problem as the build for an order progresses. We provide new perspectives on this approach and outline possible ways for further development. References L. Caccetta and S. P. Hill. An application of branch and cut to open pit mine scheduling. J. Global Opt. 27 (2003), pp. 349–365. doi: 10.1023/A:1024835022186 M. Ibrahimov, A. Mohais, S. Schellenberg, and Z. Michalewicz. Scheduling in iron ore open-pit mining. Int. J. Adv. Man. Tech. 72.5–8 (2014), pp. 1021–1037. doi: 10.1007/s00170-014-5619-8 M. Menabde, G. Froyland, P. Stone, and G. A. Yeates. Mining schedule optimisation for conditionally simulated orebodies. Advances in Applied Strategic Mine Planning. Ed. by R. Dimitrakopoulos. Springer International Publishing, 2018, pp. 91–100. doi: 10.1007/978-3-319-69320-0_8 W. L. Sweatman, K. White, A. Albrecht, M. Peron, P. Pudney, and D. Whittle. Mining sequencing to control blend quality. Proceedings of the 2016 Mathematics and Statistics in Industry Study Group, MISG-2016. Ed. by P. Pudney and A. J. Roberts. Vol. 58. ANZIAM J. 2018, pp. M33–M66. doi: 10.21914/anziamj.v58i0.12475
47
Anjos, Vítor, and Carlos A. Silva Ribeiro. "Maximization and Control of Nodular Iron Melt’s Self-Feeding Characteristics to Minimize Shrinkage." Materials Science Forum 925 (June 2018): 147–54. http://dx.doi.org/10.4028/www.scientific.net/msf.925.147.
Full textAbstract:
This paper describes one possible method to anticipate and control the development of solidification shrinkage, during solidification of nodular cast iron melts, based upon industrial trials made using special designed test castings and closed volume thermal analysis cartridges.The methodology considers both the solidification morphology and solidification shrinkage critical size, which is always a difficult component of analysis, along with a developed contraction defect index, that allows the application to several types of molten metal and inoculation practices.The use of thermal analysis allows the recognition of unique melt characteristics, in real time, that are not accessed by more traditional measurement equipment. This allows the definition of thermal analysis patterns that characterize the best melt quality for self-feeding. This is a practical to use and powerful tool for modern foundries, taking advantage of new metric, data collection and data analysis. We aim to contribute to scientific knowledge and simultaneously to provide information that can be useful for foundries to improve their process efficiency.
48
Богданов, А. Н., С. В. Волошин, В. В. Тыренко, and А. С. Поляков. "IRON DEFICIENCY ANEMIA IN ELDERLY AND SENILE PATIENTS." Успехи геронтологии, no. 6 (March 5, 2021): 1150–57. http://dx.doi.org/10.34922/ae.2020.33.6.018.
Full textAbstract:
Анемический синдром выявляется у /популяции, в том числе железодефицитная анемия - у 1,5 млрд человек. Гериатрические пациенты являются одной из основных групп риска развития анемии. Дефицит железа и железодефицитная анемия приводят к снижению качества жизни, повышению заболеваемости и летальности, что обусловливает необходимость своевременной диагностики и лечения. Диагностический алгоритм включает анализ параметров феррокинетики, маркеров воспаления и инструментальные исследования для верификации причины анемии. Для лечения используют современные препараты железа для приема внутрь и парентерального введения под контролем показателей крови и феррокинетики. Anemic syndrome is common in / of the population, including iron deficiency anemia - in 1,5 billion people. Geriatric patients are one of the main risk group for anemia. Iron deficiency and iron deficiency anemia lead to a decrease in quality of life, an increase in morbidity and mortality, what requires timely diagnosis and treatment. The diagnostic algorithm includes the analysis of iron metabolism, inflammation markers and instrumental tests to verify the cause of anemia. Modern oral and parenteral iron preparations are used for treatment under control of blood indexes and iron metabolism parameters.
49
Muangthai, Isara, and Sue J. Lin. "Quantifying Total Environmental Impact of the Power Sector Using Input-Output Life Cycle Assessment: a case study for Thailand." E3S Web of Conferences 122 (2019): 05003. http://dx.doi.org/10.1051/e3sconf/201912205003.
Full textAbstract:
The electricity generation is vital to industries and economic development in Thailand. In this study, the input-output life cycle assessment (IO-LCA) is applied to estimate the direct and indirect impacts from the power generation sector for the years 2005 and 2010. Based on the input-output analysis, more than 90% of the total environmental impact of Thailandʼs power sector involves ten relevant sectors. Results reveal that the most significant environmental damage was on natural resources followed by human health, climate change, and ecosystem quality. The most dominant environmental impacts were non-renewable energy, global warming and respiratory inorganic effects. Furthermore, the power sector, which accounts for 80% and 61% of total each impact in 2010 respectively, had a large direct impact on climate change and human health. On the contrary, the coal and lignite, and metal ore sectors contributed significantly to indirect impacts on ecosystem quality and resources. Regarding the results, some additional suggestions can be made to improve current policies in Thailand, including the implementation of green manufacturing in the iron and steel production, and installing control devices in all power plant units. Consequently, IO-LCA can be applied to other industries for assessing their total environmental impacts, and planning CO2 mitigation strategies.
50
Duchesne, Josée, Andrea Rodrigues, and Benoit Fournier. "Concrete damage due to oxidation of pyrrhotite-bearing aggregate: a review." RILEM Technical Letters 6 (July 26, 2021): 82–92. http://dx.doi.org/10.21809/rilemtechlett.2021.138.
Full textAbstract:
Oxidation of pyrrhotite-bearing aggregates is one of the major causes of concrete damage in numerous buildings in Trois-Rivières in Canada and Connecticut in the USA. In the presence of moisture and oxygen, pyrrhotite oxidizes to generate iron-and sulfate-rich secondary minerals that cause internal sulfate attack. Iron sulfides are accessory minerals of different rock types. The distribution of sulfides is often very heterogeneous in terms of aggregate particles, even at the level of the quarries in which some areas may contain copious amounts than others, which complicates the sampling method. Pyrrhotite is a complex mineral with varying chemical composition, crystallographic structure, and specific surface area. These factors influence the reactivity of pyrrhotite. Therefore, it is challenging to control the quality of the aggregate sources.
In this study, recent advances in the identification and quantification of pyrrhotite to diagnose complicated cases are presented, and a performance-based approach for the quality control of new sources of aggregates is introduced. The performance-based approach is preferred because it eliminates the influence of the oxidation of pyrrhotite.