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Articoli di riviste sul tema "Ore-dressing"

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Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2024

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1

Liu, Bingyu, Dingsen Zhang e Xianwen Gao. "A Method of Ore Blending Based on the Quality of Beneficiation and Its Application in a Concentrator". Applied Sciences 11, n. 11 (31 maggio 2021): 5092. http://dx.doi.org/10.3390/app11115092.

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Ore blending is an essential part of daily work in the concentrator. Qualified ore dressing products can make the ore dressing more smoothly. The existing ore blending modeling usually only considers the quality of ore blending products and ignores the effect of ore blending on ore dressing. This research proposes an ore blending modeling method based on the quality of the beneficiation concentrate. The relationship between the properties of ore blending products and the total concentrate recovery is fitted by the ABC-BP neural network algorithm, taken as the optimization goal to guarantee the quality of ore dressing products at the source. The ore blending system was developed and operated stably on the production site. The industrial test and actual production results have proved the effectiveness and reliability of this method.

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2

Cao, Shi Ming, Xiao Lin Zhang e Shu Qin Zeng. "The Present Situation and Progress of Zinc Oxide Flotation". Advanced Materials Research 756-759 (settembre 2013): 68–71. http://dx.doi.org/10.4028/www.scientific.net/amr.756-759.68.

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This paper introduces the zinc oxide ore flotation process and flotation reagents; analyses the reasons why zinc oxide ore is difficult to concentrate; introduces new techniques of zinc oxide ore dressing; prospects the development trend of zinc oxide ore dressing.

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3

Sukhova, Anna V., E. A. Preobrazhenskaya, A. V. Il’Nitskaya e V. A. Kir’Yakov. "THE HEALTH OF WORKERS OF CONCENTRATING MILLS BY MODERN TECHNOLOGIES OF CONCENTRATION OF MINERALS AND PREVENTION MEASURES". Health Care of the Russian Federation 61, n. 4 (24 maggio 2019): 196–201. http://dx.doi.org/10.18821/0044-197x-2017-61-4-196-201.

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The article presents the results of study of factors of occupational risk for health of workers of ore-dressing factories. At ore-dressing factories, despite of implementing new technological processes and modern equipment, leading role of noise factor and pollution of air of working zone with aerosols predominantly of fibrogenic effect is preserved. for workers of ore-dressing factories a high degree of industrial conditioning of diseases of blood circulation organs, respiratory organs, bone muscular system, INT organs is specific. The structure of occupational diseases is formed by dust diseases of lungs and occupational pathology of organ of hearing. The complex of preventive measures is developed and ways of their implementation are proposed targeted to supporting health of workers opf ore-dressing factories and preventing development of occupational and occupationally conditioned diseases.

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4

Golik, V. I., O. Z. Gabaraev, Yu I. Razorenov e S. A. Maslennikov. "Metal leaching from ore dressing tailings". Izvestiya. Ferrous Metallurgy 65, n. 7 (27 luglio 2022): 511–18. http://dx.doi.org/10.17073/0368-0797-2022-7-511-518.

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The problem of depletion of available mineral resources is identified and the reasons for its actualization are characterized due to incomplete extraction of metals from mined ores. It is noted that the strategy of the mining industry may be the use of unconventional technologies of metal extraction within the framework of combining traditional technologies with innovative leaching ones. It is proved that utilization of enrichment tailings, formation of the processes algorithm and engineering forecast of the prospects of the new technology are the real directions of mining production development. The paper considers a method of experimental substantiation of the possibility of waste-free utilization of ferruginous quartzite dressing tailings from the Kursk Magnetic Anomaly. The planning matrices and the results of comparing the technologies of traditional leaching of dressing tailings in conditioners and leaching in a high-speed disintegrator mill are presented with regression analysis of experimental data and graphical interpretation. A reference is given on the processes of mechanical activation, as a real opportunity to improve the indicators of the processing metal-containing raw materials, including involving dressing tailings in production. The experimental results obtained can be used in hydrometallurgical processes, including leaching of metals from dressing tailings, increasing the extraction of metals with a higher content. The paper considers the data on the metals content in secondary tailings after leaching in a disintegrator with mechanochemical processes activation. The directions of improvement of preparation of metal-containing raw materials for leaching in conditioners – disintegrators are indicated. The economic efficiency of waste-free disposal of dressing tailings is composed of the cost of extracted metals, raw materials for related industries and reducing environmental damage from the storage of toxic tailings of primary processing.

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5

ARAI, Satoshi, Hiroki YOTSUMOTO, Shinichi ITO e Hiroshi SAKAMOTO. "Study of Complex Tin Ore Dressing." RESOURCES PROCESSING 39, n. 1 (1992): 2–7. http://dx.doi.org/10.4144/rpsj1986.39.2.

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6

Korobeinikov, M. V., A. A. Bryazgin, V. V. Bezuglov, E. A. Shtarklev, A. Yu Vlasov, S. A. Kondratyev e V. I. Rostovtsev. "Radiation-Thermal Treatment in Ore Dressing". IOP Conference Series: Materials Science and Engineering 81 (23 aprile 2015): 012124. http://dx.doi.org/10.1088/1757-899x/81/1/012124.

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7

Pelevin, Aleksei, Vil Saitov e Vladimir Dmitriev. "Separation of magnetite concentrate before the last grinding stage". E3S Web of Conferences 177 (2020): 01002. http://dx.doi.org/10.1051/e3sconf/202017701002.

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For magnetite and titanium magnetite ores, it is possible to use technology with the separation of concentrate before the last grinding stage. The possibility of staged separation of iron concentrate is due to different physical-mechanical properties of magnetite and rock minerals. The results of industrial and laboratory tests on the use of special magnetic separators with special structure, Derrick screen and screw separators in iron ore dressing schemes are presented. A comparison of proven dressing methods is performed. The choice of a specific dressing method for the staged separation of magnetite concentrate before the last grinding stage is determined by the properties of the base ore and the economic justification.

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8

Suleimenov, Batyrbek, e Yelena Kulakova. "THE PROSPECTS FOR THE USE OF INTELLIGENT SYSTEMS IN THE PROCESSES OF GRAVITATIONAL ENRICHMENT". Informatyka Automatyka Pomiary w Gospodarce i Ochronie Środowiska 9, n. 2 (21 giugno 2019): 46–49. http://dx.doi.org/10.5604/01.3001.0013.2547.

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Intelligent control systems are actively developing and can significantly reduce financial costs and improve the environmental performance of ore-dressing processes. Usage of intelligent control systems for gravitational enrichment allows to minimize costs and negative influence of ore tails on the environment, exclude losses of concentrate and energy resources in the ore-dressing process. The paper discusses the problems and prospects for the application of intelligent control systems of gravity concentration equipment. A structure of the control system and an intelligent model for determining the frequency of pulsation jigging machine based on fuzzy logic are proposed. The model is based on data obtained from experts, it is researched. The obtained results allow to judge about the prospects for the implementation of intelligent systems in the management of ore enrichment.

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9

Krasavtseva, EA, VV Maksimova e DV Makarov. "Environmental hazard of loparite ore dressing tailings". E3S Web of Conferences 247 (2021): 01044. http://dx.doi.org/10.1051/e3sconf/202124701044.

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Mobilization of environmentally hazardous elements from loparite ore tailings when exposed to various leaching agents was studied in laboratory conditions. Leaching of pollutants from fresh tailings when exposed to atmospheric precipitation and the processes of interaction of mature tailings dust particles (-0.071 mm) with soil water were examined. It was found that in both cases, there is an intensive decomposition of the minerals making up the tailings and conversion of heavy metals (Zn, Mn, Sr) and rare earth elements of the light group (La - Sm) into a dissolved, and therefore bioavailable form. At the same time, the pollutant concentrations were many times higher than the maximum permissible concentrations for fishery water bodies. The results of the experiments indicate the environmental hazard associated with loparite ore concentration tailings due to the pollution of environment with heavy metals and rare earth elements released when the tailings interact with rainwater and soil water.

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10

Niemi, A. J. "Steady-State Optimization of Ore-Dressing Plants". Isotopenpraxis Isotopes in Environmental and Health Studies 25, n. 4 (gennaio 1989): 176–80. http://dx.doi.org/10.1080/10256018908624089.

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11

Yuan, Su Juan, Zhi Yong Shen e Xiao Long Lu. "Experimental Research on Dressing of Tin-Iron Ore". Applied Mechanics and Materials 303-306 (febbraio 2013): 2528–32. http://dx.doi.org/10.4028/www.scientific.net/amm.303-306.2528.

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Based on studying of ore property and tests, the suitable mineral processing flowsheet for the tin—iron ore had been determined. Better technical and economic indexes had been achieved: the iron concentrate grade reached 64.45%, and the tin concentrate grade reached 13.06%. It gave a technical reference to rational development and utilization of such kind of tin-iron ore resource.

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12

Chen, Jun, Bang Wen Zhang, Chen Xin Liu e Lin Chao Ke Bu. "Research on Microwave Carbon-Thermal Reduction of the Preparation Concentrate of Coarse Niobium". Advanced Materials Research 415-417 (dicembre 2011): 968–73. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.968.

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Research is tested by the ways of microwave reduction-weak magnetic separation for recycling niobium and iron based on the preparation concentrate of rough niobium. Reduction is performed in 4 temperatures which are 700°C、750°C、800°C and 850°C for the ore, then weak magnetic separation test is taken in 4 current which are 0.6A、0.8A、1.0A and 1.2A, for the purpose of analyzing effect of magnetic current on the dressing index. The results show that, in these 4 types of temperature, hematite in the ore is well reduced to magnetite. At the temperature of 850°C, part of magnetite will be further reduced to FeO. The more the magnetic current is, the higher preparation concentrate producing rate and the iron yield are, but the purity may be a little going down. The higher the reducing temperature is, the more obvious the purity will be; the yield of Nb2O5 in tailing ore falls down with the rising up of the magnetic current, and the purity is a little bit going up. The higher the temperature of reduction is, the more obvious the yield falls. Considering the dressing index of both preparation concentrate and tailing ore, the best dressing index should be proceeding in the current of 1.2A, at the temperature of 750°C, yield and grade of the preparation concentration iron are 91.34% and 54.66% respectively, and yield and grade for Nb2O5 in tailing ore are 70.63% and 7.12% respectively.

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13

Yu, Yongfu, e Chaoying Qi. "Magnetizing roasting mechanism and effective ore dressing process for oolitic hematite ore". Journal of Wuhan University of Technology-Mater. Sci. Ed. 26, n. 2 (aprile 2011): 176–81. http://dx.doi.org/10.1007/s11595-011-0192-6.

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14

Wang, Li Jie, Jian Xin Li, Lian Kui Sun, Fu Jun Zhang e Xiu Kun Yang. "Magnetite Processing and Magnetic Field Analysis of Iron Ore Core Inductor in Iron Grade Sensor". Applied Mechanics and Materials 687-691 (novembre 2014): 4405–10. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.4405.

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In order to realize the online monitoring for iron grade of the magnetite during the dressing process, an iron grade fast measurement method based on electromagnetic induction is given, critical segment of the method is to make the iron grade information acquisition by adopting an iron ore core inductance sensor. Magnetic field analysis for iron ore core inductors of the sensor is explored in the paper. Taking a magnetite in certain regions of Liaoning as the test typical sample examples, physicochemical properties of its raw ore are analyzed, the iron ore samples are prepared and made, and the dressing process are completed. Ferromagnetics features of the magnetite samples above is analyzed, magnetic field distribution of the iron ore core inductor is analyzed, and analytic calculation formula of the magnetic fields is derived. Theory of solving the inductance of iron ore core inductor adopting finite element method of energy is discussed. Furthermore, total finite element design for the iron ore core inductor is made; distribution of electromagnetic field is analyzed. Influence regulations of self-inductance coefficients of the inductor are obtained, thus, the optimal combination of structural parameters of the inductor are designed. There is important practical significance to realize the iron grade testing automation for magnetite and other iron ores of the thesis research above.

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15

Golik, V. I., O. Z. Gabaraev, Yu I. Razorenov e S. A. Maslennikov. "Study of Metal Leaching from Ore Dressing Tailings". Steel in Translation 52, n. 7 (luglio 2022): 662–67. http://dx.doi.org/10.3103/s0967091222070063.

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16

Thomassen, B. "The Black Angel lead-zinc mine 1973–90". Rapport Grønlands Geologiske Undersøgelse 152 (1 gennaio 1991): 46–50. http://dx.doi.org/10.34194/rapggu.v152.8154.

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On 25th July 1990 the last ore was processed in the ore dressing plant at Mårmorilik thereby terminating seventeen years exploitation of the Black Angel (Sorte Engel) lead-zinc deposit (Fig. 1). During that period some 1.4 million tons zinc, 0.4 million tons lead and 250 tons silver have been extracted from the deposit which originally comprised 13.6 million tons ore grading 12.3% Zn, 4.0% Pb, 29 ppm Ag and 13.7% Fe (Table 1). The mining operations ceased because the extractable ore reserves were exhausted.

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17

Kompaniets, Maria, Andrey Plakhin, Maria Selezneva, Tatiana Kochergina e 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.

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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.

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18

Nie, Yi Miao, Qi Hui Dai e Xiao Long Lu. "Experimental Research of Low-Grade Tin-Iron Ore Separation". Advanced Materials Research 641-642 (gennaio 2013): 377–80. http://dx.doi.org/10.4028/www.scientific.net/amr.641-642.377.

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Iron ore and tin mineral are the mainly recovered minerals of the low-grade ore, which could be effectively separated by a strong magnetic separation-gravity concentration process, with ore iron grade of 20.3%, tin grade 0.18%. Stage grinding and stage separation was used, getting the grade of iron concentrate and the recovery rate of tin separation index, the feeder of tin was magnetic separation tailing, by shaking table re-election, obtained tin concentrate grade was 10%, production was 0.34% (compared to the original ore, tin dressing) .Tin concentration ratio reached more than 330.

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19

Nikiforova, N. A. "POSSIBILITIES OF THE EFFECTIVE WASTE MANAGEMENT OF ORE MINING AND DRESSING GROUPS FOR THE PRODUCTION OF THE HEAVY - AGGREGATE". Science and Transport Progress, n. 33 (25 agosto 2010): 185–90. http://dx.doi.org/10.15802/stp2010/13302.

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20

Krasavtseva, E. A., T. T. Gorbacheva, L. A. Ivanova e V. V. Maksimova. "MUNICIPAL WASTEWATER IN EXPERIMENTS ON RECLAMATION OF LOPARITE ORE DRESSING TAILINGS". Water and Ecology 26, n. 3 (30 settembre 2021): 44–55. http://dx.doi.org/10.23968/2305-3488.2021.26.3.44-55.

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Introduction. This paper discusses the effectiveness of using clarified municipal wastewater (CMW) and wastewater sludge (WS) to form stable phytocenoses at the waste storage facilities of the rare metal industry in Murmansk Region. The restoration of the vegetation cover at tailing dumps is limited by the low content of organic matter and associated nitrogen, and the low bioavailability of plant nutrients (K, Ca, Mg, P). The use of WS and other ameliorants of organic nature is a type of chemical amelioration aimed primarily at improving the edaphic properties of man-made soils. Methods. We examined the loparite ore dressing tailings sampled in the operating field of the tailing dump of a rare metal industry enterprise in the center of the Kola Peninsula. In the course of the study, we determined the suitability of the man-made soil for reclamation. To form seeded phytocenosis in a laboratory experiment, seeds of meadow fescue (Festuca pratensis Huds.) were used. The laboratory experiment involved the introduction of CMW, WS, a mixture of WS with silica clay into the soil, and a check. Analysis of the soil and plants was performed using inductively coupled plasma mass spectrometry. The quality of seeded cenosis was assessed according to the following parameters: green biomass, plant height, and projective cover. Results. The preliminary assessment of the man-made soil suitability for reclamation showed the following: the loparite ore dressing tailings have unfavorable characteristics both for the natural regeneration of the vegetation cover and biological reclamation. The introduction of ameliorants had a stimulating effect on the growth of terrestrial biomass during the formation of phytocenosis under laboratory conditions. The results of leaf analysis confirmed the effectiveness of the surface application of organic additives with regard to the loparite ore dressing tailings. Conclusion. In the laboratory experiment with the simulation of surface application, the stimulating effect of unconventional ameliorants (clarified municipal wastewater, wastewater sludge, and its mixture with silica clay) on the supply of nutrients to the reclaimed loparite ore dressing tailings was confirmed. The investigated ameliorants can be recognized as suitable for the biological reclamation of the dressing tailings of the rare metal industry, which does not require costly earthing and the application of protective polymer coatings.

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21

Maksimova, V. V., E. A. Krasavtseva, V. A. Masloboev e D. V. Makarov. "Investigation of the solubility of dust particles in soil solution at different temperatures (on the example of the tailings of the loparite ores' concentration)". Vestnik MGTU 24, n. 1 (31 marzo 2021): 107–17. http://dx.doi.org/10.21443/1560-9278-2021-24-1-107-117.

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A number of large mining enterprises are located on the territory of the Murmansk region. Dusting overburden dumps and tailings storage sites leads to a complex of long-term consequences for the environment. The output of the silty fraction (-0.071 mm) of "stale" tailings of loparite ore dressing (the first field of the tailing dump) is about 22 %. The investigated material is represented by nepheline, microcline, aegirine; loparite, analcime are diagnosed in impurity quantities; the average content of cerium, lanthanum, neodymium - rare earth elements of the light group - 0.18, 0.03 and 0.015 %, respectively. In laboratory conditions, a simulation of the ingress of a fine fraction of loparite ore dressing tailings into the soil has been carried out; the interaction of tailings material with distilled water and water extract from conditionally background soil at different temperatures has been studied. In the course of the study, it has been found that the introduction of dissolved organic matter intensifies the processes of destruction and partial dissolution of the aluminosilicate matrix of rock-forming minerals; an intensive transition of rare earth elements and heavy metals into soluble forms has been recorded. The research results indicate the ecological danger of the finely dispersed material of "stale" tailings of loparite ore dressing due to the ingress of dust particles into the soil and their interaction with soil waters.

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22

Intogarova, T. I., O. S. Valieva e Y. P. Morozov. "Reduction of Mineral Overgrinding in Sulfide Ore Dressing Technology". IOP Conference Series: Earth and Environmental Science 666, n. 3 (1 marzo 2021): 032099. http://dx.doi.org/10.1088/1755-1315/666/3/032099.

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23

Golik, V. I., Yu V. Dmitrak, Yu I. Razorenov, S. A. Maslennikov e V. I. Lyashenko. "Mechanochemical Technology for Iron Extraction from Ore-Dressing Tailings". Steel in Translation 51, n. 4 (aprile 2021): 241–48. http://dx.doi.org/10.3103/s0967091221040069.

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24

Bochkarev, G. R., V. I. Rostovtsev, Yu P. Veigel't e Yu T. Mazurov. "Certain theoretical aspects of intensification of ore dressing processes". Journal of Mining Science 30, n. 2 (marzo 1994): 205–10. http://dx.doi.org/10.1007/bf02046182.

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25

Semun, N. Ts, S. V. Mamyachenkov e D. A. Rogozhnikov. "Combined processing of Erdenet Ore-Dressing Plant pyrite concentrates". Metallurgist 57, n. 1-2 (maggio 2013): 77–79. http://dx.doi.org/10.1007/s11015-013-9693-1.

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26

Jedwab, Jacques, Jose Mendes Chuva e Eric Poot. "Reflected-light microscope and SEM/EMP observations on the behaviour of aurostibite (AuSb2) during amalgamation". Mineralogical Magazine 56, n. 385 (dicembre 1992): 561–65. http://dx.doi.org/10.1180/minmag.1992.056.385.11.

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AbstractThe Mobale gold mine (Kivu, Zaire) has been worked since 1923, but the presence of aurostibite in the ore was recognized only very recently. The discovery of the mineral has also led to the recognition of its heretofore unsuspected reactivity during the amalgamation ore dressing operations. At the surface of aurostibite a layer of up to 30 μm thickness forms which has an overall brown colour and a low reflectivity, and is composed of several variegated, concentric zones. These zones contain gold, mercury, antimony and oxygen, with traces of iron and arsenic. Oxygen is present with a concentration range of 2-4 wt.% (20-30 at.%). The zones form at the expense of aurostibite, according to micrographical criteria. In complex grains formed of gold-arsenopyrite-galena-aurostibite, only aurostibite is affected by the formation of the external brown zones. Later pure gold veneers are deposited on the outermost surface of the brown layers during the processing of the ore. The newly discovered features of processed aurostibite could explain some of the difficulties met with during the dressing of antirnonian gold ores.

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27

Liu, Wenbo, Defeng Sun e Te Xu. "Integrated Production and Distribution Planning for the Iron Ore Concentrate". Mathematical Problems in Engineering 2019 (28 febbraio 2019): 1–10. http://dx.doi.org/10.1155/2019/7948349.

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This paper studies the production and distribution planning problem faced by the iron ore mining companies, which aims to minimize the total costs for the whole production and distribution system of the iron ore concentrate. The ores are first mined from multiple ore locations, and then sent to the corresponding dressing plant to produce ore concentrate, which will be sent to distribution centers and finally fulfill the customers' demands. This paper also tackles the difficulty of variable cut-off grade when making mining production planning decisions. A mixed-integer programming model is developed and then solved by a Lagrange relaxation (LR) procedure. Computational results indicate that the proposed solution method is more efficient than the standard solution software CPLEX.

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28

SATO, TAKASHI. "Mining.Ore dressing and cyanidation.Automatic control of ore dressing bulk floatation at Kamioka and Shikama Mines." Shigen-to-Sozai 109, n. 4 (1993): 244–47. http://dx.doi.org/10.2473/shigentosozai.109.244.

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29

Davydov, S. Ya, e A. N. Semin. "Thermal enrichment of gold- bearing sulfide mineral material using centrifugal flotation". NOVYE OGNEUPORY (NEW REFRACTORIES), n. 9 (30 novembre 2023): 11–15. http://dx.doi.org/10.17073/1683-4518-2023-9-11-15.

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Depleted gold-containing sulfide mineral materials can be used in cement production, in the construction industry, in road construction and other sectors of the national economy. This will allow metallurgical enterprises to switch to low-waste or non-waste technology. Studies and practice of ore dressing with a high degree of sulfidity show that gold extraction is directly dependent on the degree of sulfidity of the ore and the content of the main ore sulfide minerals in it. To increase the efficiency of gold extraction, a device for enriching gold-containing sulfide materials using centrifugal flotation is proposed

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Sherstiuk, N. P. "Assessment of environmental risk of water bodies in the conditions of mineral deposits development". IOP Conference Series: Earth and Environmental Science 1254, n. 1 (1 ottobre 2023): 012104. http://dx.doi.org/10.1088/1755-1315/1254/1/012104.

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Abstract A brief analysis of the mining industry impact on the environment is provided. It is proposed to assess the ecological situation of water bodies on the territory of Iron Ore Dressing Works (GOK) according to the magnitude of ecological risk (e.g. Iron Ore Dressing Works (Northern GOK)). Calculations of ecological risk values based on the content of microcomponents in the water were carried out for man-made (tailings storage) and natural water bodies (the Saksahan river, a pond in the Nedayvoda stream). It was concluded that over time (from 2014 to 2020) the ecological risk of most water bodies is increasing from 0.17 in the Saksahan river to -2.53 in tailings storage. The complex ecological situation on the territory of the Northern GOK proves the need to implement more effective environmental protection measures in order to achieve the criteria of sustainable development.

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Matveyeva, T. N., L. B. Lantsova e O. I. Gladysheva. "Effect of ore dressing on flotation of copper and arsenic minerals in sulphide ore processing". Mining Industry Journal (Gornay Promishlennost), n. 6/2021 (15 gennaio 2022): 48–50. http://dx.doi.org/10.30686/1609-9192-2021-6-48-50.

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Monomineral flotation results showed that the use of a new reagent S-cyanoethyl N, N-diethyldithiocarbamate enhances the flotation activity of chalcopyrite, in contrast to flotation with butyl xanthate, and reduced the flotation ability of arsenopyrite, which makes this reagent promising for its use in the selective flotation of complex sulfide ores.

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Sun, Ji Shu, Yuan Ming Dou, Zhao Xia Chen e Chun Feng Yang. "Experimental Study on the Performances of Cement Stabilized Iron Ore Tailing Gravel in Highway Application". Applied Mechanics and Materials 97-98 (settembre 2011): 425–28. http://dx.doi.org/10.4028/www.scientific.net/amm.97-98.425.

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Iron ore tailings as a kind of waste products after ore dressing is one of the major industrial solid wastes. Iron ore tailings not only cover huge land and pollute environment, but also give rise to security risks. The comprehensive utilization of iron ore tailings need to be studied systematically. According to the method in Test Methods of Materials Stabilized with Inorganic Binders for Highway Engineering, the technical performances of cement stabilized iron ore tailing gravel in highway application were studied by systemic experiments in this paper. These include the strength, modulus, and frost resistance property, water stability. And the influencing factors of the mixture strength were analyzed, too. The results show that the mixture of cement stabilized iron ore tailing gravel has higher strength and modulus, good frost resistance property and water stability. The technical performances of cement stabilized iron tailing gravel conform to the current specification, so it can be used as sub-base course or base course material.

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33

WATANABE, TETSUMI. "Smelting.Operation of a ore dressing plant at the Kosaka smelter." Shigen-to-Sozai 109, n. 4 (1993): 258–61. http://dx.doi.org/10.2473/shigentosozai.109.258.

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34

ODAKA, TAKEO. "Support the improvement of ore dressing performance at morenci mine." Shigen-to-Sozai 111, n. 6 (1995): 387–94. http://dx.doi.org/10.2473/shigentosozai.111.387.

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35

Suvorova, Olga, Victoria Kumarova, Dmitriy Nekipelov, Ekaterina Selivanova, Dmitriy Makarov e Vladimir Masloboev. "Construction ceramics from ore dressing waste in Murmansk region, Russia". Construction and Building Materials 153 (ottobre 2017): 783–89. http://dx.doi.org/10.1016/j.conbuildmat.2017.07.137.

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36

Stefanyuk, I. V., E. L. Oleinikova, L. G. Khodskii, A. A. Sirotinskii e E. K. Nazimova. "Glass-enamel coatings based on apatite-nepheline ore dressing products". Glass and Ceramics 50, n. 3 (marzo 1993): 112–16. http://dx.doi.org/10.1007/bf00678618.

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37

Arikan, Pervin, Orhan Aytemiz e Abdullah Zararsiz. "X-Ray Fluorescence Analysis of Iron in Ore Dressing Processes". Spectroscopy Letters 31, n. 2 (marzo 1998): 275–82. http://dx.doi.org/10.1080/00387019808003252.

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38

Bozhkov, Ognyan, Christina Tzvetkova, Ludmila Borisova e Boris Bryskin. "Phytomining: New Method for Rhenium Production". AM&P Technical Articles 170, n. 5 (1 maggio 2012): 34–37. http://dx.doi.org/10.31399/asm.amp.2012-05.p034.

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Abstract (sommario):

Abstract The scattered rhenium in the environment around copper and molybdenum mines and copper processing factories is a potential source for rhenium production. Phytomining is an inexpensive and environmentally friendly method for extracting rhenium and remediating exhausted soils near copper mines and ore-dressing regions.

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39

Photos-Jones, E., e J. Ellis Jones. "The building and industrial remains at Agrileza, Laurion (fourth century BC) and their contribution to the workings at the site". Annual of the British School at Athens 89 (novembre 1994): 307–58. http://dx.doi.org/10.1017/s0068245400015446.

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A detailed programme of sample collection and laboratory analysis was undertaken at Agrileza, an ore-dressing installation in the Laurion. The site consists of three compounds with associated washeries (Agrileza A, B, and C), some excavated partially, others in full, in the late 1970s and early 1980s and dating to the last quarter of the 4th cent. BC. The particular functions of some of the rooms in compound C are tentatively put forward. The main part of the paper is concerned with the nature, composition, and particle size distribution of the tailings recovered both from washeries A and C and from elsewhere in compound C. The silver-to-lead ratios and particle size distribution of the tailings may suggest that the series of basins and channels making up each washery served not merely as a water purification device, but as a means of trapping ore that had escaped the first washing, for the purpose of dressing it further.

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40

Liu, Zheng-Gen, Man-Sheng Chu, Zheng Wang, Wei Zhao e Jue Tang. "Study on Metallized Reduction and Magnetic Separation of Iron from Fine Particles of High Iron Bauxite Ore". High Temperature Materials and Processes 36, n. 1 (1 gennaio 2017): 79–88. http://dx.doi.org/10.1515/htmp-2015-0005.

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AbstractHigh iron bauxite ore is a typical unmanageable polyparagenetic resource and owns high comprehensive utilization value. Separation of iron from fine particles of high iron bauxite ore by the process of metallized reduction and magnetic dressing was researched systemically. The effect of magnetic field intensity, reduction temperature, reduction time, mole ratio of fixed carbon to reducible oxygen (FC/O) and ore particles size on separation indexes was researched. The results show that, with the conditions of reduction temperature of 1,400 °C, reduction time of 180 min, FC/O of 2.0, ore particle size of –2.0 mm and magnetic field intensity of 40 KA/m, about 89.24 % of the iron could be removed from high iron bauxite ore as metallic iron. Meanwhile, 86.09 % of the aluminum is stayed in non-magnetic fraction as alumina. However, the formation of hercynite (FeAl2O4) limits the reduction rate of iron oxides to metallic iron. The lower reduction conditions and higher recovery ratio of iron could be achieved with adopting ore-coal composite agglomerates or adding catalyst.

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41

Duryagina, Asiya, Irina Talovina, Holger Lieberwirth e Regina Ilalova. "Morphometric parameters of sulphide ores as a basis for selective ore dressing". Записки Горного института 256 (10 novembre 2022): 527–38. http://dx.doi.org/10.31897/pmi.2022.76.

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To assess the possibility of selective disintegration and reduction of overgrinding of hard-to-reproduce ores, optical microscopic and X-ray microtomographic studies were carried out and quantitative characteristics of morphological parameters of disseminated and rich cuprous ore samples from Norilsk-type Oktyabrsky deposit were identified. Among quantitative morphological parameters the most informative are area, perimeter, edge roughness, sphericity, elongation and average grain spacing for disseminated copper-nickel ores; area, perimeter, edge roughness and elongation for rich cuprous ores. The studied parameters are characterized by increased values and dispersion in ore zones, which is especially important for fine-grained ores, which are difficult to diagnose by optical methods. Three-dimensional modelling of the internal structure of sulphide mineralisation samples was carried out using computed X-ray microtomography, which allows observation of quantitative parameters of grains, aggregates and their distribution in the total rock volume and interrelationship with each other. The evaluation of rock pore space by computer microtomography made it possible to compare the results obtained with the strength characteristics of rocks and ores, including those on different types of crushers. The obtained quantitative characteristics of structural-textural parameters and analysis of grain size distribution of ore minerals allow us to evaluate the possibility of applying selective crushing at various stages of ore preparation

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42

Ribeiro, José Pancrácio, e Claudio Henrique T. Ribeiro. "New mega-sized wet high intensity magnetic separator: a cost-effective solution to reclaim iron ore fines from tailing dams". Rem: Revista Escola de Minas 66, n. 4 (dicembre 2013): 529–33. http://dx.doi.org/10.1590/s0370-44672013000400019.

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Ten years of continuous research and development have led to a major improvement in the field of iron ore Wet High Intensity Magnetic Separation - WHIMS. With this cutting-edge technology, Gaustec has established a new world record in this class of Magnetic Separators, by providing a sheer feed rate of up to 1400 tph for iron ore fines. Although low-grade iron ore mines will benefit from this new technology, focused on herein is the reclaiming of low-grade iron ore tailing from ponds, having in mind its huge positive environment impact and business opportunity. Based on this newly developed technology, the construction in Brazil of a Concentration Plant started in 2012 for dressing iron ore tailings at 45% Fe grade, at Itaminas Mine. This plant went into operation this year. Based on the good performance of this first unit, the construction of a second Concentration Plant of the same type, to further reduce to 18% Fe in the tailings, is under way, scheduled to be started-up in 2014.

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43

Li, Zhe Fu, Xiang Xin Xue, Tao Jiang, He Yang e Mi Zhou. "Study on the Properties of Boron-Containing Ores/Epoxy Composites for Slow Neutron Shielding". Advanced Materials Research 201-203 (febbraio 2011): 2767–71. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.2767.

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Abstract (sommario):

Three kinds of low cost shielding materials using boron-containing ores and epoxy as starting materials were developed. The three boron-containing ores consist of natural green ore that is specific in China and the two artificial minerals that are boron-containing iron ore concentrate and boron-rich slag. They were got after natural green ore dressing and separation from blast furnace, respectively. The shielding performance of slow neutron and 60Co γ ray among the three shielding materials were compared. The results show that boron-rich slag as neutron absorber performs relative good slow neutron shielding ability, its macroscopic cross section (Σ) is 0.271cm-1 which is about 1.72 times higher than Lead-Boron Polyethylene B201 whose macroscopic cross section (Σ) is 0.158cm-1. Boron-containing iron ore concentrate/epoxy composite performs relative good 60Co γ ray shielding ability and its linear attenuation coefficient (μ) is 0.0772cm-1. The elements boron and iron that exist as compound in ore are the main reasons to affect the slow neutron shielding performance. The iron element that exists as compound in the ore has the main attribution to 60Co γ ray shielding.

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44

Zhirnov, A. M. "PRODUCTION OF STEEL AND PRECIOUS METALS THROUGH THE DEVELOPMENT OF LARGE INTEGRATED IRON ORE DEPOSITS IN JEWISH AUTONOMOUS REGION AS THE MOST IMPORTANT FACTOR OF THE ECONOMY RISE IN THE FAR EAST". Regional problems 25, n. 3 (2022): 115–17. http://dx.doi.org/10.31433/2618-9593-2022-25-3-115-117.

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Abstract (sommario):

The iron ore deposits in the Jewish Autonomous region are characterized by large reserves of ores (3bn. tons) and super-large resources of precious metals (1500–2500 tons). The newly created Kimkan-Sutarsky GOK is focused only on dry ore dressing, instead of the previously planned metallurgical plant for steel production. The state directive documents provide for the complete processing of natural raw materials on site and obtain the final product. The presence of large resources of gold and platinum in iron ores, exceeding the value of the iron ore containing them makes it necessary and obligatory to build a metallurgical plant with complete processing of ores. That would dramatically increase the efficiency of the enterprise and ensure the breakthrough development of the entire economy of the Far East.

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45

ТАЖИБАЕВА, Д. М. "Utilization of Iron Ore Dressing Tailings in Production of Building Materials". Trudy Universiteta, n. 1 (2021): 66–69. http://dx.doi.org/10.52209/1609-1825_2021_1_66.

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46

Tsitsilina, D. M. "CHANGES IN APATITE ORE DRESSING INDICES WHEN FLOATED BY LEAD OLEATE". Фундаментальные и прикладные вопросы горных наук 7, n. 1 (2020): 239–42. http://dx.doi.org/10.15372/fpvgn2020070137.

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47

IWASAKI, IWAO. "Application of the ore dressing technique to recycling and the development." RESOURCES PROCESSING 45, n. 2 (1998): 87–94. http://dx.doi.org/10.4144/rpsj1986.45.87.

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48

Nokhrina, O. I., I. D. Rozhikhina, I. E. Proshunin e I. E. Khodosov. "POLYMETALLIC MANGANESE ORE DRESSING AND OPTIMAL USE OF THE OBTAINED CONCENTRATES". Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy 58, n. 5 (10 giugno 2015): 309. http://dx.doi.org/10.17073/0368-0797-2015-5-309-315.

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49

V, Biletskyi. "Research into adhesive ore-dressing technologies of fine- and nano gold". Mining of Mineral Deposits 10, n. 4 (30 dicembre 2016): 19–28. http://dx.doi.org/10.15407/mining10.04.019.

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50

Florsch, N., F. Téreygeol e P. J. Cruz. "The Ore-Dressing Grindstone Called a ‘Quimbalete’: a Mechanics-Based Approach". Archaeometry 58, n. 6 (26 agosto 2015): 881–98. http://dx.doi.org/10.1111/arcm.12203.

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