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Kenzhaliyev, Bagdaulet, Tatiana Surkova, Ainur Berkinbayeva, Leila Amanzholova, Brajendra Mishra, Bekzat Abdikerim e Dinara Yessimova. "Modification of Natural Minerals with Technogenic Raw Materials". Metals 12, n. 11 (7 novembre 2022): 1907. http://dx.doi.org/10.3390/met12111907.
Abstract (sommario):
The presence of uranium-containing wastes from large provinces in the Republic of Kazakhstan significantly complicates the ecological situation, causing damage to the soil and hydrosphere due to the uncontrolled spread of large volumes of natural waters contaminated with radionuclides. They are usually utilized by the sorption method; however, the use of synthesized sorption materials is limited by their high price, and natural minerals are limited by low sorption characteristics. Many modification options are used in order to improve the sorption characteristics, but only a few methods have been found applied in industry. The main disadvantages include the complexity in the application and modification of reagents rarely used in industrial practice, which increases their cost, and is an obstacle to their widespread use. The authors of this research have studied the possibility of using technogenic raw materials—slags of phosphorus production—as a modifier of natural minerals. The methods of slag activation are investigated, the optimal conditions for the modification of the natural minerals zeolite and shungite by activated slag are determined, and the sorption properties of modified sorbents are studied.
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Gerasimova, Lidia G., Ekaterina S. Shchukina e Anatoly I. Nikolaev. "Titanium-containing functional materials from natural raw materials and technogenic waste". Transactions of the Kоla Science Centre of RAS. Series: Engineering Sciences 1, n. 1/2023 (29 marzo 2023): 92–95. http://dx.doi.org/10.37614/2949-1215.2023.14.1.017.
Abstract (sommario):
Natural mineral raw materials, as a rule, have a complex composition. Its processing with the release of one or two components is accompanied by the formation of a large amount of waste, including man-made, which is harmful to the environment. In this regard, the problem of its complex processing is important and remains relevant in setting the directions of scientific research to improve existing and development of new technologies.
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Auyesbek, S. T., N. B. Sarsenbayev, B. K. Sarsenbayev, T. M. Khudyakova, Zh T. Aimenov, K. S. Abdiramanova, Т. S. Aubakirova et al. "THERMAL INSULATING MATERIALS BASED ON MAGNESIUM-CONTAINING TECHNOGENIC RAW MATERIALS". RASAYAN Journal of Chemistry 16, n. 01 (2023): 413–21. http://dx.doi.org/10.31788/rjc.2021.1616927.
Abstract (sommario):
The article considers the possibility of replacing traditional mineral raw materials (dolomite and asbestos) to obtain thermal insulating material – sovelite – with technogenic raw materials, i.e. tails of polymetallic ores (dolomitebarium tails) and synthetic wollastonite, obtained on the basis of phosphoric slag. The research results allowed us to establish that the dolomite-barium “tails” can serve as a technogenic raw material base to obtain thermal insulating material – sovelite. The advantages of the proposed technology to obtain thermal insulating material –sovelite– in comparison with the traditional one allow for reducing energy costs for production due to the absence of stages of raw material extraction, crushing, and grinding, a reduced firing temperature, the absence of the stage of grinding the fired product since during firing there is waste dispersion, natural dolomite saving, replacement of expensive natural reinforcing material – chrysotile asbestos–with synthetic wollastonite, obtained on the basis of phosphoric slag. The use of synthetic wollastonite significantly improves the quality characteristics and increases the service life of the products.
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Peregudov, Yu S. "Magnetic Oil Sorbents based on Technogenic and Natural Inorganic Materials". Ecology and Industry of Russia 25, n. 2 (10 febbraio 2021): 34–40. http://dx.doi.org/10.18412/1816-0395-2021-2-34-40.
Abstract (sommario):
The results of the study of the fractional composition, physicochemical and sorption characteristics of technological calcium carbonate and glauconite are presented. It is shown that the fraction of technological chalk with a particle size of more than 0.125 mm absorbs the greatest amount of oil and gasoline. The oil is better absorbed by the fraction of chalk with a particle size of 0.1–0.25 mm. For glauconite, oil sorption increases with decreasing particle size. The complete absorption of oil on the solid surface by the glauconite sorbent occurred within 2 min and about 10 min by the carbonate sorbent; the recovery rates were 99% and 90%, respectively. The best results in terms of the degree of water purification from oil were shown by a carbonate sorbent with a particle size of more than 0.125 mm – 83 % and glauconite with a particle size of 0.045–0.1 mm – 90% with an oil film thickness of 0.5 mm. The degree of water purification from oil was 80 % for the carbonate sorbent and 93 % for the glauconite one with an oil film thickness of 0.5 mm. With an increase in the thickness of the oil and oil films, the degree of water purification decreases.
5
Erdman, S. V., K. M. Gapparova, T. M. Khudyakova e A. V. Tomshina. "Magnesia Binder Preparation from Local Natural and Technogenic Raw Materials". Procedia Chemistry 10 (2014): 310–13. http://dx.doi.org/10.1016/j.proche.2014.10.052.
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Timofeeva, S. S., V. V. Garmyshev e D. V. Dubrovin. "Assessment of the Contribution to the Pollution of the Atmosphere of Technogenic and Natural Fires in the Irkutsk Oblast". Ecology and Industry of Russia 22, n. 9 (21 settembre 2018): 67–71. http://dx.doi.org/10.18412/1816-0395-2018-9-67-71.
Abstract (sommario):
On the example of the Irkutsk oblast, the problem of air pollution with technogenic and natural fires is considered. The factual basis of the study was the statistics of the consequences of fires in residential, public, industrial and other objects of the technosphere and natural fires, also combustion of forest combustible materials in the residential, landscape-recreational, forest-park, suburban zones of cities and settlements for 2011-2016. On the basis of existing approaches, qualitative and quantitative indicators of burned materials are determined as a result of technogenic and natural fires, ignition, and specific indicators of toxicant emissions in the combustion of various types of materials, which allowed to comprehensively determine the gross emissions of pollutants in the Irkutsk oblast. It is established that as a result of technogenic and natural fires, ignitions, the annual gross emissions of pollutants averaged about 18.2% of the mass of stationary sources of pollution in the oblast.
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S.P., Kochetkov, Bryl S.V., Smirnov N.N., Rukhlina N.I. e Rukhlin G.V. "Conditioning techniques technogenic raw materials used for binders". Ekologiya i stroitelstvo 2 (2017): 16–24. http://dx.doi.org/10.35688/2413-8452-2017-02-003.
Abstract (sommario):
For production of binding building materials in Russia and worldwide, used a variety of calcium-containing natural raw material: calcium carbonates, aragonite (CaCO3); sulfates-gypsum (CaSO4∙2H2O,CaSO4); oxides and hydroxides (bauxite glinozemservice); perforate-apatites and phosphates (Ca5∙(PO4)3∙F). The article discusses the need for air-conditioning of phosphogypsum to ensure that he was suitable without restrictions for processing into high-quality gypsum binders.
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Шеина, С. Г., М. С. Сайдумов, И. С.-А. Муртазаев e М. П. Маслаков. "COMPLEX ORGANOMINERAL SUPPLEMENT USING NATURAL AND MAN-MADE RAW MATERIALS". Вестник ГГНТУ. Технические науки, n. 2(28) (26 agosto 2022): 108–15. http://dx.doi.org/10.34708/gstou.2022.77.99.010.
Abstract (sommario):
Статья посвящена проблеме разработки органоминеральной добавки для проектирования современных высококачественных строительных композитов с применением некондиционного природного и техногенного сырья. В статье представлены результаты исследований по изучению запасов сырья Чеченской и соседних республик и областей, с целью установления возможности для получения на их основе современных высококачественных композитов для возведения строительных конструкций и производства строительных работ. Приведен сравнительный анализ данных по изучению технологических (подвижность, удобоукладываемость и др.), физических, механических и деформативных свойств, как бетонной смеси на различном сырье, так и бетона. Определены свойства и структура строительных композитов, полученных с использованием органоминеральной добавки на основе техногенного сырья. Установлено, что бетоны на основе местного техногенного и природного сырья характеризуются повышенной прочностью (50 МПа и выше), сохраняемостью (более 10 час.), незначительными значениями относительных деформаций усадки (не более 0,6-0,75 мм/м), меньшим размером пор, а значит, и повышенными показателями долговечности. The article is devoted to the problem of developing an organomineral additive for the design of modern high-quality building composites using substandard natural and technogenic raw materials. The article presents the results of research on the study of the reserves of raw materials in the Chechen and neighboring republics and regions, in order to establish the possibility of obtaining on their basis modern high-quality composites for the construction of building structures and the production of civil works.A comparative analysis of data on the study of technological (mobility, workability, etc.), physical, mechanical and deformation properties of both a concrete mixture based on various raw materials and concrete is given. The properties and structure of building composites obtained using an organomineral additive based on technogenic raw materials have been determined.It has been established that concretes based on local technogenic and natural raw materials are characterized by increased strength (50 MPa and more), shelf life (more than 10 hours), insignificant values of relative shrinkage deformations (no more than 0.6-0.75 mm/m), smaller size pores, and, therefore, increased durability.
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Petlovanyi, M., K. Sai, O. Borysovska e A. Khorolskyi. "ANALYSIS OF THE USE OF INDUSTRIAL WASTE FOR THE FORMATION OF BACKFILL MASS IN MAN-MADE VOIDS". Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, n. 1 (2023): 115–26. http://dx.doi.org/10.31474/2415-7902-2023-1-115-126.
Abstract (sommario):
Purpose. The objective of this study is to examine and compile a list of the most common types of backfill materials based on the analysis of successful backfilling practices in the development of technogenic cavities in mineral deposits in Ukraine. Methodology. The study employed theoretical analysis, information systematization, and data synthesis related to the research problem. It investigated the characteristics of different backfilling methods and the experience of using backfill materials in various countries where backfilling practices have been implemented. The study relied on data from government statistics, waste disposal sites, regional environmental reports, and the environmental passport of a leading region in industrial waste accumulation. Results. The study determined that insufficient attention has been given to the analysis and study of various types of industrial waste and their potential utilization as backfill materials for filling technogenic cavities in Ukraine. The main advantages and disadvantages of existing backfilling methods commonly used in mining practice have been analyzed. Among these methods, solidifying backfilling was found to be the most promising in terms of geotechnical stability and reliability of the artificial mass. Based on the analysis of successful backfilling practices, a priority list of the most common types of backfill materials has been made. Additionally, the study examined the volumes of waste accumulation and occupied areas for different types of backfill materials using a leading region as an example. Scientific novelty. The study has identified the most practical and characteristic types of natural and technogenic backfill materials that can be considered for the development of backfilling practices for technogenic cavities in Ukraine. Practical significance. The study of natural and technogenic waste materials, their accumulation parameters, and characteristics is an important step towards the development of effective backfilling practices for technogenic cavities and subsequent restoration of disturbed territories.
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Saydumov, M. S., S. A. Y. Murtazaev, A. Kh Alaskhanov, I. S. Dagin e M. R. Nakhayev. "Man-Made Waste as a Raw Material Base for the Production of Modern Construction Composites". Ecology and Industry of Russia 23, n. 7 (19 luglio 2019): 31–35. http://dx.doi.org/10.18412/1816-0395-2019-7-31-35.
Abstract (sommario):
The results of tests of secondary construction materials derived from man-made materials are presented. The granulometric and chemical compositions of secondary products from technogenic raw materials are investigated. The analysis of local natural and man-made raw materials base of the Chechen Republic. The possibilities of using local natural raw materials (crushed stone from gravel, natural sand, gravel, gypsum, cement, etc.) in the technology of building composite materials are shown. The suitability and efficiency of the use of technogenic raw materials in concrete and mortar technology, justified by the complex economic and environmental effect of its use in the practice of building materials science, have been experimentally proved. It has been established that with the introduction of advanced innovations in the field of concrete science it is possible to produce competitive products that are not inferior to foreign analogues.
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Lavrusevich, Andrey, Alisa Abene e Ivan Lavrusevich. "Geoecological aspects of technogenic impact on the territory of raw materials production for construction". MATEC Web of Conferences 265 (2019): 06013. http://dx.doi.org/10.1051/matecconf/201926506013.
Abstract (sommario):
The article is devoted to the problem of inconsistency of needs of the modern stage of the life activity of human society and the possibilities of self-restoration of Earth's geospheres. The increase in the technogenic load and the rate of consumption of natural resources leads to a disturbance of the natural balance. On the example of territories of mining of non-metallic materials, it is shown how technogenic transformation of the natural environment provokes extensive negative consequences. As a result of the quarrying of non-metallic raw materials for the construction industry, the relief, microclimate, hydrological and hydrogeological regimes of the territories, the state of ecosystems, and the pollution of the environment are changing. In the vast territories of the deposits themselves and areas adjacent to them, dangerous exogenous geodynamic processes (suffosion, erosion, landslides, screes, etc.) develop. To preserve the natural balance, it is necessary to conduct comprehensive monitoring in the areas of deposits and introduce a system of recultivation measures.
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Samsonov, ALEXEI, ALEXEI Burmistrov e Afanasiy Tel’nov. "Potential mineral resources and multi-component use of natural and technogenic tungsten deposits of the Dzhida ore field (city of Zakamensk, Republic of Buryatia)". Ores and metals, n. 1 (8 aprile 2024): 17–35. http://dx.doi.org/10.47765/0869-5997-2024-10002.
Abstract (sommario):
The article provides an overview of published and deposited data on the geological structure, mineral and chemical composition of ores, and the ore processing technologies for the Barun-Naryn and other technogenic deposits formed during long-term exploitation of natural molybdenum and tungsten deposits of the Dzhida ore field. Based on statistical analysis of these data and on author’s laboratory analytical studies, the mineral potential of the natural and technogenic deposits of the region was appro- ximately quantitatively assessed for a wide complex of by-product components of the ores. Modern possibilities of multi-element processing of the technogenic raw materials accumulated in this area and outlook for solving the actual problems in the future are demonstrated
13
Voloshyn, Petro. "Analysis of influence of natural and technogenic factors on architectural monuments sustainability within historical centre of Lviv". Visnyk of the Lviv University. Series Geography, n. 47 (27 novembre 2014): 50–57. http://dx.doi.org/10.30970/vgg.2014.47.816.
Abstract (sommario):
The main factors that influenced on sustainability of architectural monuments were considered. Among natural factors principle role belongs to presence of soils with sensor features in buildings active zone, and significant changes of those features under influence of technogenic press. Constructive features of buildings, kinds of building materials and their age belong to technogenic factors. Key words: architectural monument, sustainability, deformation, basement, geological environment, soil features.
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Levickaya, Kseniya, Nataliya Alfimova, Ivan Nikulin, Natalia Kozhukhova e Aleksander Buryanov. "The Use of Phosphogypsum as a Source of Raw Materials for Gypsum-Based Materials". Resources 13, n. 5 (14 maggio 2024): 69. http://dx.doi.org/10.3390/resources13050069.
Abstract (sommario):
Gypsum binders and the products based on them are widely in demand in the construction materials market, which is due to their easy production technology, lower energy consumption, and low environmental impact in relation to Portland cement. Not only natural gypsum (NG), but also phosphogypsum (PG), which is a by-product of the synthesis of orthophosphoric acid from phosphorite rock, can be used as a source of raw materials for the production of gypsum materials. PG is produced annually in large quantities throughout the world. In chemical composition, PG mainly consists of calcium sulfate dihydrate CaSO4·2H2O, so it is a good potential analogue of natural gypsum, which is used as the main component of gypsum building materials. Thus, the useful recycling of PG as a technogenic resource with valuable properties will expand the raw material base for the production of gypsum materials. This approach to handling technogenic resources fits well with the principles of a circular economy. However, like any technogenic resource, PGs from different enterprises normally differ in their deposits of the original phosphate rock and production technologies. Therefore, PG contains a large number of undesirable impurities, the proportion and composition of which vary over a wide range. This feature does not allow for predicting the properties of PG-based materials without a preliminary detailed study of PG. This research was aimed at carrying out a comprehensive study of the characteristics of PGs from three different industrial plants to evaluate their relationship with the properties of gypsum materials based on them. It was found that PGs have significant differences in their structural and morphological characteristics both in relation to each other and in relation to NG. Also, binders based on PG and NG have significant differences in their physical properties. The average density, compressive strength, and flexural strength for the PG binders with equal workability are lower than those of NG binders. At a water/solid ratio (W/S) < 0.7, all PG binders exhibit comparable compressive strength to NG binders. Thus, PG can act as an alternative to natural gypsum in gypsum binders.
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Nelyubova, Viktoriya V., Yulia N. Ogurtsova, M. N. Sivalneva, Valeria V. Strokova e P. Zhao. "Specifics of Structure Formation of Cement Stone with Silica Raw Material - A Substrate of Photocatalytic Composite Material". Materials Science Forum 1017 (gennaio 2021): 153–62. http://dx.doi.org/10.4028/www.scientific.net/msf.1017.153.
Abstract (sommario):
The increasing urbanization of urban areas poses the challenge of the development of materials capable of self-cleaning from organic pollutants formed. Previous papers substantiated the possibility of the coating of titanium oxide as the main agent of the photocatalytic method of cleaning structural materials on silica raw materials in order to increase the degree of its distribution in the volume of cement matrix and, as a result, increase its efficiency.It is obvious that a silica substrate will affect the processes of structure formation during hardening of a cement matrix. During the research, the processes of phase transformations of cement stone modified with silica raw materials of natural and technogenic origin were studied. As a result, the influence of siliceous modifiers on the strength characteristics of the cement stone was determined, which allowed ranking them according to the degree of decrease in efficiency as follows: technogenic raw materials; natural raw materials of silicate composition; natural raw materials of aluminosilicate composition. Quantitative assessments of the degree of efficiency showed the irrationality of using aluminosilicate composition as a silica modifier of natural raw materials, which is explained by its low pozzolanic activity.
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Nelyubova, Viktoriya V., Yulia N. Ogurtsova, M. N. Sivalneva, Valeria V. Strokova e P. Zhao. "Specifics of Structure Formation of Cement Stone with Silica Raw Material - A Substrate of Photocatalytic Composite Material". Materials Science Forum 1017 (gennaio 2021): 153–62. http://dx.doi.org/10.4028/www.scientific.net/msf.1017.153.
Abstract (sommario):
The increasing urbanization of urban areas poses the challenge of the development of materials capable of self-cleaning from organic pollutants formed. Previous papers substantiated the possibility of the coating of titanium oxide as the main agent of the photocatalytic method of cleaning structural materials on silica raw materials in order to increase the degree of its distribution in the volume of cement matrix and, as a result, increase its efficiency.It is obvious that a silica substrate will affect the processes of structure formation during hardening of a cement matrix. During the research, the processes of phase transformations of cement stone modified with silica raw materials of natural and technogenic origin were studied. As a result, the influence of siliceous modifiers on the strength characteristics of the cement stone was determined, which allowed ranking them according to the degree of decrease in efficiency as follows: technogenic raw materials; natural raw materials of silicate composition; natural raw materials of aluminosilicate composition. Quantitative assessments of the degree of efficiency showed the irrationality of using aluminosilicate composition as a silica modifier of natural raw materials, which is explained by its low pozzolanic activity.
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CHANTURIA, Valentin, Irina SHADRUNOVA e Olga GORLOVA. "INNOVATIVE PROCESSES OF DEEP AND ENVIRONMENTALLY SAFE PROCESSING OF TECHNOGENIC RAW MATERIALS IN THE CONDITIONS OF NEW ECONOMIC CHALLENGES". Sustainable Development of Mountain Territories 13, n. 2 (30 giugno 2021): 224–37. http://dx.doi.org/10.21177/1998-4502-2021-13-2-224-237.
Abstract (sommario):
Innovative processes of deep and complex processing of technogenic raw materials in the context of sustainable development of the mining industry and the economic challenges facing the mining industry should ensure the transition to a circular economy and the maximum use of natural resources. The article reflects the priority scientific and technological research on the involvement of technogenic mineral resources in efficient processing. Presented, developed at ICEMR RAS, including jointly with universities, research and production organizations and enterprises, modern innovative processes of deep and environmentally friendly processing of refractory mineral raw materials of complex material composition (tailings of enrichment of non-ferrous and noble metal ores, poor off-balance ores, slags ferrous and nonferrous metallurgy, sludge of metallurgical production) and hydro-mineral technogenic resources (acidic mineralized bottom-dump waters of mining enterprises of the copper-zinc complex of the Urals, saponite-containing circulating waters of diamond processing factories). Among other things, new directions in the field of selective disintegration of finely dispersed mineral raw materials based on energy effects and deep processing of slags are outlined; increasing the selectivity of enrichment processes; combined processing of technogenic raw materials; resource-saving processing of technogenic and hydro-mineral resources, obtaining secondary products from processing waste. It is shown that in the face of new economic challenges, Russia has sufficient scientific and technological potential in the field of deep and environmentally safe processing of technogenic raw materials in the form of developed and, to varying degrees, tested innovative resource-saving technologies that correspond to the world level, and in a number of technologies are superior to it.
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Buravchuk, N. I., e O. V. Guryanova. "USE OF TECHOGENIC RAW MATERIALS IN THE TECHNOLOGY OF CERAMIC BRICKS PRODUCTION". Innovatics and Expert Examination, n. 2(30) (3 dicembre 2020): 160–69. http://dx.doi.org/10.35264/1996-2274-2020-2-160-169.
Abstract (sommario):
The article presents the results of a study of burnt rocks of mine dumps, ash and slag waste and clay raw materials for the purpose of their use in the technology of manufacturing ceramic bricks. Indicators of their quality are given. In terms of properties and composition, this raw material is close to clay. Compositions and technological modes for the manufacture of ceramic bricks using burnt rocks of mine dumps and ash and slag waste have been developed. The results of laboratory research and industrial tests are presented. The possibility of using this technogenic raw material in the technology of manufacturing ceramic bricks has been proven. The use of burnt rocks and ash and slag waste in the compositions for the manufacture of ceramic bricks can improve its quality, including strength and frost resistance. In all respects, prototypes of ceramic bricks meet the requirements of regulatory documents. The involvement of technogenic raw materials in production allows you to save part of natural raw materials, reduce the cost of products while improving their quality, and help reduce the negative impact of waste on the environment in the areas of their location.The involvement of technogenic raw materials in production allows you to save part of natural raw materials, reduce the cost of products while improving their quality, and help reduce the negative impact of waste on the environment in the areas where they are located.
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Myachina, К. V., e E. V. Krasnov. "Ways to optimize steppe under of oil and gas production". South of Russia: ecology, development 16, n. 1 (13 aprile 2021): 76–86. http://dx.doi.org/10.18470/1992-1098-2021-1-76-86.
Abstract (sommario):
Aim. To substantiate ways of geo‐ecological optimization of an oil and gas field landscape (through the example of the Volga‐Ural steppe region).Materials and Methods. The development of directions for geoecological optimization of landscape is based on the authors’ previously developed ideas about the transformation processes of landscape, the formation and stages of the oil and gas natural‐technogenic geosystem development, and the hierarchy and multi‐scale of technogenic changes of landscape.Results. Optimization solutions were developed for the successive stages of planning of oil and gas extraction, operation of an oil and gas natural‐technogenic geosystem field and the end of development and disposal of oil and gas facilities. The main direction of landscape optimization is highlighted and its tasks and principles formulated.Conclusion. Reducing technogenic impact on steppe landscape, its control and regulation is not only a problem of scientific research, but also one of the state of public consciousness and the setting of priorities by management bodies. Methods of reducing the impact and restoringsteppe landscapes can only be effective as a result of implementing a targeted policy of greening education and a corresponding change in public consciousness.
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Chernyak, L. P., L. I. Melnyk, N. O. Dorogan e I. A. Goloukh. "Integrated use of technogenic raw materials in cement technology". Кераміка: наука і життя, n. 2(51) (25 giugno 2021): 19–24. http://dx.doi.org/10.26909/csl.2.2021.3.
Abstract (sommario):
This work used a combination of modern physico-chemical research methods with standardized testing of technological and operational properties of raw materials, clinker, cement and compositions with its application.
Results over of research of the silicate systems with rice husk and ash-fly as technogenic raw material for making of cement clinker are driven. The features of the chemical-mineralogical composition, phase transformations during burning and astringent properties of material at the use of 42,5-50,5 % industry wastes in composition initial raw material mixtures are shown.
The object of the study were raw material mixtures for the production of Portland cement clinker based on the systems of chalk - clay - man-made raw materials and chalk - man-made raw materials.
The possibility of replacing exhaustible and non-renewable natural raw materials with a complex of multi-tonnage wastes of agro-industry and heat energy, which meets the objectives of expanding the raw material base of cement production, resource conservation and environmental protection.
Peculiarities of phase formation during firing of silicate systems of chalk-polymineral clay and chalk-technogenic raw materials taking into account changes in the quantitative ratio of components, in particular rice husk and ash-removal of thermal power plants are noted.
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SAPELKINA, T. V., G. I. STOROZHENKO e T. E. SHOEVA. "Composite Ceramic Materials from Natural and Technogenic Rocks of the Republic of Tyva". Stroitel'nye Materialy, n. 5 (2023): 9–13. http://dx.doi.org/10.31659/0585-430x-2023-813-5-9-13.
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Kotova, O., S. Sun, E. Kotova, A. Ponariaydov e R. Brodskaya. "Aluminosilicates: interphase boundary interactions and nature engineering of nanostructures." Journal of Physics: Conference Series 2315, n. 1 (1 luglio 2022): 012003. http://dx.doi.org/10.1088/1742-6596/2315/1/012003.
Abstract (sommario):
Abstract The scientific basis for the development of innovative materials (microporous, nanostructured, composite) based on natural (technogenic and synthetic) aluminosilicate raw materials determine prototypes of new technologies in modern industry. Inspired by this, we studied interphase boundary interactions of the “aluminosicate resource – nanoproduct” type system as a key factor of aggregation and nanostructuring in the processes of mineral formation and synthesis. To study features of the heterogeneity of the structure and their correlations with the thermodynamic parameters of the formation of mineral aggregates and individuals, instrumental and methodological resources were used. Based on previous and current studies of natural, synthesized and technogenic aluminosilicates (zeolites, clays, halloysite, fly ash, halloysite nanotubes, etc., features of the constitution and surfaces, sorption, ion-exchange, catalytic, –QS and +QS, biocompatibility, nontoxicity and other useful properties) the prospects for promotion of their industrial application were considered.
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Ismayilov, M. J. "Anthropogenic transformation of landscapes in arid climate conditions and their risks". Journal of Geology, Geography and Geoecology 31, n. 4 (9 gennaio 2023): 653–58. http://dx.doi.org/10.15421/112261.
Abstract (sommario):
The article represents the outcomes of our study materials on the branch of technogenic transformation of landscapes based on scientific methods. We have analyzed landscape ele- ments, such as relief, climate, vegetation, dynamics of forests, precipitations and etc. We classify the anthropogenic activities in the study area. Consequently, we have determined risks and problems in the landscapes of the coastal zone of the Caspian Sea due to human impact. Transformation characterizes of Salyan and Lankaran, South-eastern Shirvan plains due to anthropogenic effects have been researched in the article. Dynamic analyzes of old and modern topo maps, satellite images, surveys of older people let to determine transformation degrees and development levels of natural and natural-an- thropogenic landscapes. Ecosystems of the protected areas are compared with landscapes undergoing anthropogenic impacts based on the analogy method. NDVI, dynamic of technogenic landscapes, forest ecosystem maps allow the creation of an anthropogenic transformation map of the study area. We divided the investigation into 5 parts due to the transformation degrees: unchanged landscapes that retain their natural structure, poorly transformed landscapes, medium transformed landscapes, strongly transformed landscapes, natural-technogenic landscapes. Risks and hazards are then assessed. We have prepared a system of measures to overcome environmental risks and hazards.
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Chartko, N. K., e A. A. Karpichenka. "RESEARCH AND MAPPING OF TECHNOGENIC LOADING ON THE MODERN LANDSCAPES OF BELARUSIAN POLESYE". Odesa National University Herald. Geography and Geology 19, n. 3(22) (1 aprile 2015): 22–28. http://dx.doi.org/10.18524/2303-9914.2014.3(22).40282.
Abstract (sommario):
Purpose. The article considers the territorial differentiation of technogenic loading on the territory of Belarusian Polesye. Methodology. The mapping technique of technogenic loading on the natural and agricultural landscapes is developed, which takes into account the introduction of mineral and organic fertilizers, pesticides, ameliorants and receipts of dust of different origins, in addition with substances that fall together with precipitation per year. Mapping was performed using ESRI ArcView and ESRI ArcGIS. Finding. Based on the literature data and own research materials compiled a series of maps of technogenic loading on the landscape of the Belarusian Polesye. Established that technogenic loading to agricultural landscapes varies from 6.3 to 17.6 tons per hectare, is thus observed increasing it from the north-east to south-west Polesye. Strict dependencies between the genera of landscapes and the value of the technogenic loading is not established. For the types of forestry and nature conservation landscapes are significantly smaller values technogenic loading (not greater than about 1 ton per hectare), without a significant spatial differentiation.Results. A number of territories of the Belarusian Polesye are requires environmental measures to reduce the impact of technogenesis on landscapes. For the West Belarusian Polessye should be defined optimal rates of technogenic loading on the agricultural landscapes according to the local agricultural specialization and soil cover structure.
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Mustafin, S. K., A. N. Trifonov, G. S. Anisimova e K. K. Struchkov. "Mercury as an indicator of geological and environmental risks in the development of various mineral raw materials". IOP Conference Series: Earth and Environmental Science 962, n. 1 (1 gennaio 2022): 012056. http://dx.doi.org/10.1088/1755-1315/962/1/012056.
Abstract (sommario):
Abstract Mercury is a highly toxic pollutant of the environment, and a quantitative assessment of its emission and migration in the technogenic transformation of mining regions is vital. The presented study focuses on the features of mercury concentration in the natural mineral raw materials, commercial products and processing waste by the example of mercury-containing copper pyrite deposits in the Urals. Mercury (its quantitative indicators) is used as a reliable element-tracer of the evolution of the technogenic system: mineral raw materials – subsurface use wastes – environmental components – food products – the human body. Such integrated approach is recommended for optimizing the forecasting, assessment and management of geological and environmental risks, as well as for the geological and environmental monitoring of the modern mining engineering system.
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Belogurova, Olga A., Marina A. Savarina e Tatyana V. Sharai. "Technogenic wastes of Kovdor GOK — raw resources for unshaped materials". Transactions of the Kоla Science Centre. Series: Natural Sciences and Humanities 1, n. 2/2022 (29 dicembre 2022): 30–40. http://dx.doi.org/10.37614/2949-1185.2022.1.2.004.
Abstract (sommario):
The article is devoted to the development of unshaped materials from industrial waste. Refractory concrete is the most popular, it consists from filler, binder and additives, which is harden under normal conditions and has limited shrinkage at application temperature. Concretes from the technogenic wastes of the Kovdor GOK using magnesium phosphate cement were obtained. As a result of studies, the grain composition of the charge was selected, the ratio of filler and binder to improve the structural properties of concrete was established, the effect of the composition and temperature of thermal treatment of concrete on the physical and technical properties were determined. The replacement of traditional fired refractories with non-fired concretes makes it possible to speed up the construction and repair of thermal units, to adopt fundamentally new technical solutions in the development of furnace designs and leads to an increase in their operational characteristics. Utilization of such waste will lead to a qualitatively new use of non-renewable natural resources, the elimination of sources of environmental pollution and the reclamation of lands occupied by waste.
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Mikhalkova, Nina, Alina Kononenko e Igor Udalov. "Analysis of the influence of technogenic facilities of the Lysychansk-Rubizhne industrial hub on the ecological state of the natural environment". Visnyk of V.N. Karazin Kharkiv National University, series Geology. Geography. Ecology, n. 56 (1 giugno 2022): 225–39. http://dx.doi.org/10.26565/2410-7360-2022-56-17.
Abstract (sommario):
Formulation of the problem. The paper is devoted to the study of the ecological state of the natural environment components in connection with the impact of technogenic facilities of the Lysychansk-Rubizhne industrial hub. The purpose of the paper is to analyze the technogenic impact of the Lysychansk-Rubizhne industrial hub on the natural environment components. Materials and methods. The natural environment components data including atmospheric air, soil, surface water, groundwater from the Regional Report on the natural environment state in Luhansk region were used and analyzed. The total pollution index was calculated to determine the level of soil contamination in the areas of biggest technogenic impact. The places furthest from the cities with powerful sources of the natural environment pollution are allocated. Mathematical processing of geochemical information was performed on separate samples. The containing of specific chemical elements in the soils of Lysychansk-Rubizhnе industrial hub is calculated. The obtained data were used to calculate the concentration coefficient. The level of chemical contamination of soils as an indicator of adverse effect on public health is determined by following indicators: 1) the chemical substance concentration coefficient (Kc), which is determined by the ratio of its actual containing in the soil (C) to the background containing (Cb); 2) the total pollution index (Zc), which is equal to the sum of the concentration coefficients of chemical elements. Results. As a result of the study, it was found that the territory of the Lysychansk-Rubizhne industrial hub is still under a huge technogenic impact, despite the closure of many enterprises. Abandoned settling tanks, sludge collectors, spoil tips, landfills of various industrial wastes and other are one of the main sources of the natural environment pollution today. The ecological state of the natural environment components (atmosphere, surface water, soil and groundwater) is described in the paper. Quite positive changes are observed only in the situation with atmospheric air. The tendency to reduce emissions of pollutants into the atmosphere is associated with the liquidation of industrial enterprises over the past 20 years. The state of other natural environment components remains unsatisfactory: surface water, soil and groundwater are contaminated with heavy metals, petroleum products, nitrates, nitrites, etc. (the nature of the pollutants depends on the nearby technogenic facilities). It is noted that these technogenic facilities lose their waterproofing over the years, so they are currently sources of pollutant migration to the natural environment. Scientific novelty and practical significance. An integral assessment of the Lysychansk-Rubizhne industrial hub impact on the natural environment components, which allowed us to talk about the different degree of technogenic impact and different influence factors, is the scientific novelty of the study. The different genesis of pollution in the given area is proved. It is established that there is an infiltration from the surface on the left bank and pollution of deep origin on the right bank. The long-term forecasts of changes in the ecological state of the Lysychansk-Rubizhne industrial hub territory are given as practical use of the obtained results. It is proposed to carry out continuous monitoring of the natural environment for a more detailed study of the environmental situation.
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Gerasimova, Lydia G., Ekaterina S. Shchukina, Yuri V. Kuzmich e Yuri G. Kiselev. "Btaining fillers for building materials from raw sphene concentrate". Transactions of the Kоla Science Centre. Series: Natural Sciences and Humanities 1, n. 2/2022 (29 dicembre 2022): 41–49. http://dx.doi.org/10.37614/2949-1185.2022.1.2.005.
Abstract (sommario):
Attraction to processing of new sources of titanium raw materials in the form of technogenic wastes of existing mining and processing industries is an important task, the solution of which will increase the use of natural resources and receive deficit products of a functional purpose. The conducted studies have shown the possibility of using raw sphene concentrate (RSC) as a filler for construction materials and adsorbent for purification of liquid effluents by changing the optical and morphological properties of the crushed concentrate.
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Namsone, Elvija, Genadijs Sahmenko, Irina Shvetsova e Aleksandrs Korjakins. "Mechanical and Thermal Properties of Magnesia Binder Based on Natural and Technogenic Raw Materials". Solid State Phenomena 320 (30 giugno 2021): 181–85. http://dx.doi.org/10.4028/www.scientific.net/ssp.320.181.
Abstract (sommario):
Because of low calcination temperature, magnesia binders are attributed as low-CO2 emission materials that can benefit the environment by reducing the energy consumption of building sector. Portland cement in different areas of construction can be replaced by magnesia binder which do not require autoclave treatment for hardening, it has low thermal conductivity and high strength properties. Magnesium-based materials are characterized by decorativeness and ecological compatibility.The experimental part of this research is based on the preparation of magnesia binders by adding raw materials and calcinated products and caustic magnesia. The aim of this study was to obtain low-CO2 emission and eco-friendly material using local dolomite waste materials, comparing physical, mechanical, thermal properties of magnesium binders.
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ABAKUMOV, Igor’ Viktorovich. "Revaluation of alluvial deposits residual reserves of boulder chrome ores of the Saranovsky ore field". NEWS of the Ural State Mining University 1, n. 2 (15 giugno 2020): 74–82. http://dx.doi.org/10.21440/2307-2091-2020-2-74-82.
Abstract (sommario):
Relevance of the work. After the collapse of the USSR, local ferroalloy industry experienced a deficit in certain types of mineral raw materials, in particular in chromium ores. In Perm Krai, in the vicinity of the village Sarany, medium and small-scale deposits of primary magmatic and fragmental slop wash ore of high iron content and alumina are known, previously used only as refractory raw materials. In the 1990–2000s, technologies for producing commercial and conversion ferrochrome with low chromium content (“charge-chromium”) using chromium ores of the Ural region, including ores from deposits of the Saranovsky group, were developed and introduced on an industrial scale. All this entailed the need for geological and economic revaluation of the reserves of known deposits, including placers of wash ores partially affected by mining operations of previous years. The revaluation included not only the residual natural reserves of deposits, but the technogenic formations in their areas containing underextracted ore round stones as well. Currently, the project for the development of boulder placers is being successfully implemented. The experience gained may be of interest in reassessing the residual reserves of objects of scarce types of mineral raw materials characterized by a complex "natural-technogenic" structure. Purpose of the work: to summarize the experience of joint revaluation of residual natural reserves and technogenic formations on the areas of placer deposits of boulder chrome ores aimed at ensuring the maximum completeness of excavation of scarce raw materials. Method and methodology of the work carried out. The main idea of the work is to jointly reassess the industrial importance of the residual reserves of boulder chrome ores contained in natural and man-made formations in placer areas. Given the relatively simple mining and geological conditions and small volumes of annual production, the criterion of “minimum industrial output of ore boulders”, which achieves equality of the recoverable value of mineral raw materials to the operating costs of obtaining marketable products, is proposed to be applied to the residual reserves of the placer, and not to individual geological blocks. This approach obliges the subsoil user to conduct continuous mining of the remaining reserves, to involve in the industrial development reserves of low-productive geological blocks, including those represented by technogenic formations, the average yield of ore boulders from which, as a rule, is lower than the estimated industrial minimum. The rational choice of placers that are simultaneously mined is justified by economic indicators used in the evaluation of mining projects (net present value, profitability index, budget efficiency, etc.), taking into account the “individual” characteristics of individual deposits. The proposed approach to involving in the development of reserves of low-productive areas (including technogenic formations) can be implemented not only at the level of individual deposits, but at the level of a group of “converging” differently productive placers as well, when both highly productive and “poor” placers are being developed, the reserves of which in the traditional assessment are classified only as off-balance sheet (potentially economic). Results of the works. The description is given of methodological approaches to the revaluation and rational use of residual reserves of boulder chrome ores disrupted by mining operations of previous years. The experience gained can be used to evaluate other mining facilities that contain natural and technogenic formations of different productivity on their area.
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Vartan, I. A., A. M. Prokashev, A. A. Skvortsov e L. I. Skvortsova. "SPECIALLY PROTECTED NATURAL AND TECHNOGENIC TERRITORIES OF THE KIROV REGION". Bulletin of Udmurt University. Series Biology. Earth Sciences 29, n. 3 (25 settembre 2019): 362–73. http://dx.doi.org/10.35634/2412-9518-2019-29-3-362-373.
Abstract (sommario):
The article presents comprehensive data on one of the nature monuments of the Kirov region under the name “Zhukovlyansky sandstone spherical concretions”. The status of a specially protected natural area of local importance was granted to it in 2017 due to the presence of clusters of spherical geological bodies of human size, which give the area a very scenic view. They were discovered during the quarrying of gravel and sand materials in the early 80-s of the last century and soon became a reason to put forward various hypotheses regarding the time and methods of their formation. The latter was the motivation for this publication, which is based on field and laboratory geological and soil-geochemical studies carried out by the authors in 2014-18. The results below give an idea of the peculiarities of the spatial structure, component composition and properties of local geosystems, the time of formation of their lithogenic basis, scientific and cognitive, tourist-recreational importance and problems of preservation of the original natural heritage of the region under consideration. From the genetic point of view, the spherical sandstone concretions located within the paleolacial province of the Vyatka Territory are treated by the authors as native Permian formations, not affected or slightly affected by fluvioglacial processes at the Pleistocene stage of geological development. They serve as a basis for the designation of a special category of protected areas on Vyatka land - natural and man-made monuments - as an example of spontaneous creation of nature and man.
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Glagolev, Evgeny S. "Effective Application of 3D Additive Technologies for Creation of Construction Compositions Using Technogenic Raw Materials". Materials Science Forum 1017 (gennaio 2021): 51–60. http://dx.doi.org/10.4028/www.scientific.net/msf.1017.51.
Abstract (sommario):
Nowadays the great attention of scientists and engineers is attracted by applying 3D-additive technologies for obtaining high-strength fine-grain concrete by using technogenic raw materials. It is distinguished from the conventional concrete by the increased content of cement stone, lower grain size, multicomponent composition and the increased specific surface of the aggregate [1-3]. The performance characteristics of such concrete mostly depend on its aggregate’s properties and water content.The paper considers the problem of improving fine-grain concretes production technologies. For this purpose the opportunities of 3D-additive technologies, which improve the efficiency of fine-grain concretes production technology due to using concrete compositions with natural and technogenic raw materials of various chemical and mineral formulas, were studied. The opportunity of increasing the economic feasibility of high-strength fine-grain concretes, produced by means of 3D-additive technology, with preserving their performance characteristics, has been demonstrated
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Glagolev, Evgeny S. "Effective Application of 3D Additive Technologies for Creation of Construction Compositions Using Technogenic Raw Materials". Materials Science Forum 1017 (gennaio 2021): 51–60. http://dx.doi.org/10.4028/www.scientific.net/msf.1017.51.
Abstract (sommario):
Nowadays the great attention of scientists and engineers is attracted by applying 3D-additive technologies for obtaining high-strength fine-grain concrete by using technogenic raw materials. It is distinguished from the conventional concrete by the increased content of cement stone, lower grain size, multicomponent composition and the increased specific surface of the aggregate [1-3]. The performance characteristics of such concrete mostly depend on its aggregate’s properties and water content.The paper considers the problem of improving fine-grain concretes production technologies. For this purpose the opportunities of 3D-additive technologies, which improve the efficiency of fine-grain concretes production technology due to using concrete compositions with natural and technogenic raw materials of various chemical and mineral formulas, were studied. The opportunity of increasing the economic feasibility of high-strength fine-grain concretes, produced by means of 3D-additive technology, with preserving their performance characteristics, has been demonstrated
34
Sakharova, A., e L. Maslennikova. "The electronic structure of the atom as a classification criterion of mineral technogenic waste". Journal of Physics: Conference Series 2131, n. 4 (1 dicembre 2021): 042095. http://dx.doi.org/10.1088/1742-6596/2131/4/042095.
Abstract (sommario):
Abstract Today, the total scientific classification of solid industrial waste is absent because of their diversity. The task of universal of mineral technogenic waste recycling is complicated by the difference in their composition. The nature of the chemical elements that make up building materials is always taken into account to predict their properties. In this regard, the purpose of the study was to determine the classification characteristics of mineral technogenic waste recycling on the basis of natural-scientific ideas about the electronic structure of the atom. Studies were conducted on model systems with ceramic oxides entering s-, p-, d- elements in ceramic matrix to test the impact of the electronic structure of the mineral waste cation on operational characteristics of building materials. The experimental results showed that the strength of the samples changes in the series s → p → d of the belonging of the introduced oxide cation to the electronic family. Additionally, such an indicator as the energy-gap width was used to study the nature of the contacting solid phases. It is possible to identify which substances in technogenic raw materials have the greatest effect on the performance of the material in value of the energy-gap width.
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Zhorov, Georgiy Aleksandrovich, Lyubov Lvovna Zakharova, Vasiliy Ivanovich Dorozhkin e Elizaveta Arkadievna Denisova. "Control of Ecotoxicants Content in Feed Additives and Veterinary Pharmacological Products". BIO Web of Conferences 37 (2021): 00041. http://dx.doi.org/10.1051/bioconf/20213700041.
Abstract (sommario):
The article is devoted to the control of ecotoxicants content in mineral and organic substances of natural and artificial origin used in the production of feed additives and pharmacological veterinary agents. In the context of the growing technogenic load on the environment, the probability of detecting increased background levels of natural and technogenic ecotoxicants in mineral and organic raw materials for the production of feed additives and veterinary products increases significantly. In this regard, more attention should be paid to the study of substances of artificial origin with a minimum content of toxic and ballast components, as well as substances that have undergone technological processing to reduce their natural level of ecotoxicants. According to modern data, amorphous silicon dioxide is an effective, safe, economically available sorbing agent and it should be considered as a promising sorption-detoxifying agent for application under the influence of xenobiotics that differ in the toxicological action mechanism on the animal organism.
36
Akovetsky, V. G., A. V. Afanasyev e J. A. Ramirez Suarez. "Geoinformational reconstructions of models of sources of hazardous natural and technogenic processes". Environmental Protection in Oil and Gas Complex, n. 3 (2023): 5–14. http://dx.doi.org/10.33285/2411-7013-2023-3(312)-5-14.
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Kindzera, D. P., V. M. Atamaniuk, Z. Ya Gnativ e I. M. Mitin. "Рroduction of light fillers on the basis of technogenic raw materials". Chemistry, Technology and Application of Substances 4, n. 1 (1 giugno 2021): 131–37. http://dx.doi.org/10.23939/ctas2021.01.131.
Abstract (sommario):
In Ukraine, along with the growing demand for tonnage production of light fillers, the need for raw materials is growing, considering that most of the range of light fillers is made from natural raw materials. Thus, a promising direction of utilization of TPP slags and coal concentrate obtained by enrichment of primary coal sludge is there involvement to the production process after preliminary drying. Drying of the thermal power plant slag and the coal concentrate, which are hydraulic mixtures, by the filtration method will reduce energy consumption due to the displacement and removal of significant amount of moisture by the moving thermal agent due to the pressure drop. The results of studies of the thermal agent velocity effect on the drying process duration of TPP slag and coal concentrate, as well as the obtained values of heat transfer coefficients at different velocities of the thermal agent for TPP slag α = 40 ÷ 112 and coal concentrate α = 92,5 ÷ 294 will allow to calculate energy consumption and scientifically substantiate the optimal technological parameters for intensification of the drying process of the charge components for porous fillers production.
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Dorogan, Nataliia, Petro Varshavets, Lev Chernyak e Oleg Shnyruk. "Application of varieties of technogenic raw materials in cement technology". Technology audit and production reserves 3, n. 3(65) (30 giugno 2022): 15–21. http://dx.doi.org/10.15587/2706-5448.2022.260337.
Abstract (sommario):
The possibility of manufacturing a mineral binder using large-tonnage waste from other industries has been studied. The object of the research are mixtures for the manufacture of cement clinker based on systems of chalk – clay – scope of paper production and chalk – clay – husks of rice processing. At the same time, urgent tasks of developing the raw material base for cement production and resource conservation were solved. The development of new initial mixtures was carried out taking into account the peculiarities of the chemical and mineralogical composition of varieties of technogenic raw materials. According to the chemical composition, rice alkali is characterized by a content of 15.6 wt. % SiO2 with a large quantitative ratio of SiO2:Al2O3=65.2 and a small amount of alkaline earth and alkaline oxides. Scop differs from alkali in a large amount of CaO (25.8 wt. %), a lower content of SiO2 at a quantitative ratio of SiO2:Al2O3=1.3. In this case, there are quantitative ratios of oxides CaO:SiO2=2.5, CaO:Al2O3=3.3, CaO:SiO2:Al2O3=3.3:1.4:1, which determine the probable phase transformations during firing. The main rock-forming mineral in rice husks is amorphous silica; Scope is marked by the presence of crystalline phases of calcite, quartz, and kaolinite. The analysis of the possible content of the studied wastes and the determination of the compositions of the raw mixtures were carried out using the computer program «Clinker». Analysis of computer calculations and experiments indicates the possibility of reducing by 11–16 wt. % consumption of natural raw materials in the composition of mixtures for the manufacture of clinker in comparison with the known production composition. According to X-ray phase analysis, the features of the development of crystalline phases during the firing of mixtures using varieties of technogenic raw materials at a maximum temperature of 1400 ºС were established. Based on the data of technological testing, the differences in indicators of binding properties were determined - the setting time of cement when used in the composition of raw mixtures of rice husk and paper scope.
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Ogurtsova, Yu N., V. V. Strokova, S. V. Nerovnaya e E. N. Gubareva. "Specific features of preparation of natural and technogenic mineral raw materials for the manufacture of photocatalytic composite materials". Obogashchenie Rud, n. 5 (31 ottobre 2023): 44–50. http://dx.doi.org/10.17580/or.2023.05.08.
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Domanskaya, Irina K., Fedor Kapustin e Rudolf Hela. "Concrete Recycling as a Source of Polyfractional Mineral Raw Materials". Solid State Phenomena 309 (agosto 2020): 126–31. http://dx.doi.org/10.4028/www.scientific.net/ssp.309.126.
Abstract (sommario):
The problems of concrete recycling as a complex poly-reinforced composite characterized by unstable composition and properties are discussed. The peculiarity of recycling concrete scrap is that its return to the production cycle can be carried out in the form of different products: coarse aggregate (recycled aggregate), fine aggregate (sand from crushed concrete), as well as in the form of a dust-like fraction. It is shown that aggregates made of crushed concrete are inferior to natural analogues due to the presence of cement-sand mortar in their composition. Given the growing threat of depletion of natural resources, it seems appropriate to consider construction waste not only as secondary resources for the production of concrete and mortars, but also more widely: as a promising technogenic source of polymineral raw materials, including for firing technologies.
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Shepelev, Igor, Aleksey Sakhachev, Anatoly Zhyzhaev, Raisa Dashkevich e Nikholay Golovnykh. "EXTRACTION OF VALUABLE COMPONENTS FROM ALUMOSILICATE NATURAL AND TECHNOGENIC MATERIALS UNDER ALUMINA PRODUCTION BY SINTERING". Proceedings of Irkutsk State Technical University 22, n. 4 (aprile 2018): 202–14. http://dx.doi.org/10.21285/1814-3520-2018-4-202-214.
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Suchkov, V. P., e A. V. Veselov. "Mechanochemical activation of natural and technogenic raw materials in the production of high strength plaster". IOP Conference Series: Materials Science and Engineering 775 (18 aprile 2020): 012127. http://dx.doi.org/10.1088/1757-899x/775/1/012127.
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Abdualiyev, B., B. Satanova, F. Abuova e G. Aralbayeva. "Sorption technology for obtaining uranium from technogenic and hydromineral raw materials using natural modified sorbents". BULLETIN of the L.N. Gumilyov Eurasian National University. PHYSICS. ASTRONOMY Series 143, n. 2 (30 giugno 2023): 36–43. http://dx.doi.org/10.32523/2616-6836-2023-143-2-36-43.
Abstract (sommario):
This work is devoted to the study of sorption technology for obtaining uranium from technogenic and hydromineral raw materials using natural modified sorbents. The main purpose of the study is to determine the effectiveness and prospects of this technology in the field of uranium mining and processing.The paper analyzes various types of naturally modified sorbents, their sorption capacity and the specificity of uranium. Special attention is paid to the environmental aspects of this technology, since the use of natural modified sorbents minimizes the negative impact on the environment.The paper also discusses methods of recovery and reuse of sorbents, which contributes to the resource efficiency of this technology. The economic benefits of the use of sorption technology are also considered in the work, taking into account the reduction of costs for the extraction and processing of uranium.The results of the study show that the sorption technology for producing uranium using naturally modified sorbents has high efficiency and prospects for industrial applications. The need for further research and innovation in this area is noted in order to improve processes and develop new types of sorbents.
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Litvintsev, Viktor, Vitaly Usikov, Yulia Ozaryan e Vladimir Alekseev. "Remote sensing of the Earth as a part of research of assessing the volume of technogenic raw and the environmental situation during the exploitation of placers". Georesursy 23, n. 4 (30 novembre 2021): 116–23. http://dx.doi.org/10.18599/grs.2021.4.13.
Abstract (sommario):
It is known that one of the main nowadays problems of subsoil use is the depletion of reserves. Every year many researchers pay attention on mining waste as a source of replenishment of the resource base. Disputes on the prospects of processing technogenic raw materials are relevant. The object of research is the technogenic neoplasms, which were the result of dredging and hydraulic processing of placer gold. The paper presents the results of assessing the prospects and places of application of information technologies, in particular, the analysis of Earth remote sensing data in the design and organization of work to involve technogenic placers in operation. It is shown that these technologies are able to increase the efficiency of work and reduce labor costs at the stage of preliminary study of potential development targets. Possibilities of detailing the infrastructure facilities of the mining and processing complex are considered. It is proposed to use the vegetation index at a non-traditional time for vegetation research in order to isolate coniferous trees on the formed secondary phytocenoses. An area assessment of the technogenic raw materials of the Kerba gold-placer cluster has been carried out. The analysis of the methodological approach based on remote sensing data is carried out. Aspects of natural vegetation restoration in the post-exploitation period are covered. Optimal combinations of raster data channel combinations for the study of the territory within the boundaries of the object under study are proposed.
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Aimbetova, I. O., D. N. Myrkheyeva, G. Zh Koishiyeva e É. O. Aimbetova. "STUDY OF THE STRUCTURE AND PHYSICAL PROPERTIES OF THE COMPOSITION OF THERMAL INSULATION MATERIALS BASED ON WASTE FROM MINING COMPLEXES". RASAYAN Journal of Chemistry 15, n. 04 (2022): 2928–32. http://dx.doi.org/10.31788/rjc.2022.1546751.
Abstract (sommario):
New heat-insulating materials were prepared via the combined use of local technogenic and natural raw materials. The mixtures of natural clay, overburden of polymetallic surface mine, charcoal chips, wood crumbs, dolomite chips, and minor amounts of triethanolamine as a hardener and stearic acid emulsion as a waterproofing agent were used as starting mixtures. For the ceramic-like materials prepared by firing at 1000оC, we report their physicomechanical parameters-shrinkage ɛ, density d, abradability a, water adsorption q, thermal conductivity k (at 50oC), and compressive strength σс. The synthesized ceramic masses may find their application in the fabrication of wall panels and lightweight concrete aggregates
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Masalimov, А., А. Smirnov, N. Orekhova e I. Grishin. "The raw material base for the discovery of magnesium oxide production promising sources in the beneficiation processes". Transbaikal state university journal 27, n. 3 (2021): 16–25. http://dx.doi.org/10.21209/2227-9245-2021-27-3-16-25.
Abstract (sommario):
The article contains the analyse of the raw material base of magnesia raw materials in Russia and its relationship with the existing deficit of high-purity magnesium oxide. Existing and promising sources of magnesia raw materials and their distribution by regions are considered in order to discover new sources that could be involved in the enrichment processes. The existing methods of enrichment of natural magnesites and the possibility of their application for technogenic raw materials are analyzed
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Golik, Vladimir, Yuri Razorenov, Vladimir Morkun, Natalia Morkun e Vitalii Tron. "Sustainable development of mining processes based on mechanochemical leaching of ore". E3S Web of Conferences 166 (2020): 03004. http://dx.doi.org/10.1051/e3sconf/202016603004.
Abstract (sommario):
Intensive development of the mining and metallurgical complex results in considerable volumes of waste materials, more than half of which are produced by mining enterprises. Modern mining and processing can provide non-waste production only if mineral extraction and grade recovery from natural and technogenic mineral materials are regarded as a single technological process and the Earth surface preservation becomes a priority in determining parameters of process integration. The research is aimed at improving of the technology of metal leaching in a disintegrator through complex application of metallic ore concentration tailings. A radical step of reducing mining waste hazards is their utilization through introducing technogenic reserves of metallic ore concentration tailings into production, thus creating a new raw material base for the mining industry. Substantiation of the concept of non-waste utilization of off-grade mineral materials depends on the amount of integration of chemical leaching and mechanochemical activation in the disintegrator and is achieved by means of modern information technologies.
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Kolchev, K. "Mining waste as a base for the formation of technogenic minerals". Collection of Research Papers of the National Mining University 74 (settembre 2023): 87–100. http://dx.doi.org/10.33271/crpnmu/74.087.
Abstract (sommario):
Purpose. Based on open sources of information, review the current state and storage of waste from mining, primary (concentration) and secondary processing of mineral raw materials. To provide a current system for the existence and transformation of mining waste in relation to the category of promising developments as the basis for the formation and study of the mineralogical and geochemical features of the formation or process of formation of technogenic minerals. Predict the variation in the geological and economic assessment of the massif as a newly created deposit. The methods. The work uses general scientific research methods – empirical and theoretical (analysis, generalization, explanation). Findings. A preliminary review of the existing types of waste from industrial sectors where mining and processing of minerals is carried out is carried out as the basis for modern mineral formation of technogenic (technical) minerals. A general modern structural diagram of the system of mineral raw materials and mining waste is presented. The originality. The potential of the existence of technogenic minerals has been revealed.It is shown that at present, technogenic raw materials are a competitive, promising mineral resource, the use of which using innovative technologies provides not only a significant technical and economic effect, but also, along the way, an environmental effect is achieved as a natural consequence of the new level of requirements of modern production. In addition, this makes it possible to reduce the negative impact on the environment, reduce the area of alienated land for the needs of mining production, and also partly solves the problem of resource conservation. Practical implementation. The result of the review can be used for planning and carrying out further scientific and methodological research of the mineralogical and geochemical characteristics of waste from mining and processing of minerals, supergene processes occurring in technogenic massifs, expanding and deepening mineralogical research in the field of environmental mineralogy in connection with technological.
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Dolgushin, I. I., Yu S. Shishkova, S. N. Darovskikh, I. A. Komarova, N. V. Vdovina, E. A. Mezentseva e K. V. Nikushkina'. "FEATURES OF MODIFYING EFFECT OF LOW-INTENSITY ELECTROMAGNETIC RADIATION OF NATURAL AND TECHNOGENIC ORIGIN ON VIABILITY AND FUNCTIONAL STATUS OF NEUTROPHILIC GRANULOCYTES". Journal of microbiology, epidemiology and immunobiology 93, n. 5 (28 ottobre 2016): 11–17. http://dx.doi.org/10.36233/0372-9311-2016-5-11-17.
Abstract (sommario):
Aim. Study effects of microwave electromagnetic radiation (EMR) of the SHF range in vitro on viability and functional status of neutrophilic granulocytes. Materials and methods. Neutrophils of peripheral blood of 30 conditionally healthy donors aged 18 - 20 years were exposed to the effect of broadband (natural, similar to sun radio emission) and mono-frequency (technogenic, similar to emission of cell phones, PCs, microwave ovens, etc.) EMR with frequency range of 4 - 4.34 GHz, generated by a SHF-generator «А1МТ-1». 16 minutes after the effect, viability of neutrophilic granulocytes, phagocytic activity, lysosome activity of cells were studied, N ВТ-reducing ability and cytokine content in supernatant were evaluated. Results. The amount of viable neutrophils significantly reduced after the effect of modelled EMR with technogenic frequency-temporal structure, functional status of viable cells did not change. Neutrophils retained viability after the effect of EMR of natural origin, increased levels of 1 Lip and TNFa was determined in supernatants, functional status of neutrophils of men remained stable, and in women an increase of phagocytic ability and a reduction of production of oxygen radicals was noted. Conclusion. The detected reduction of the amount of viable neutrophils under the effect of EMR of technogenic origin could result in disturbances in the system of innate immunity, other homeostasis elements of the human organism and development of pathologic conditions. At the same time, the detected effects of EMR of natural origin open perspectives of use of modelled microwave EMR of SHF range in prophylaxis and clinical medicine.
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Lytkina, E. "Mixed magnesian binders using local silicate waste production". Journal of Physics: Conference Series 2131, n. 4 (1 dicembre 2021): 042035. http://dx.doi.org/10.1088/1742-6596/2131/4/042035.
Abstract (sommario):
Abstract Today, the waste of the mining industry is more than 8 billion tons. Analysis of the literature data showed that most of the man-made waste that is generated as a result of the development of mineral deposits is suitable for use in many industries, in particular, in the production of building materials. The use of technogenic raw materials allows us to solve the following tasks: Environmental aspect - reducing the number of dumps and reducing their volumes. And this, in turn, improves the ecology of regions and territories. 2. Economic aspect - reducing the cost of construction products through the use of almost free raw materials, the release of more competitive products. Of course, it is necessary to provide that part of the costs will be spent on additional processing, revision, activation, modification of this technogenic raw material component. But today we have to think about how to clear the territory of substandard “waste rock” and use it to reduce the production and consumption of natural raw materials. A similar process can create waste-free production.