scholarly journals COMBINED TECHNOLOGY FOR PROCESSING WASTE DUMPS OF THE BAIZHANSAI MINE

2021 ◽  
Author(s):  
А.Е. Конурбаев ◽  
Г.Н. Ибрагимова ◽  
С.К. Курбаниязов ◽  
Г.А. Жаужанова
Keyword(s):  
Negative Impact ◽  
Electrochemical Activation ◽  
Trace Impurities ◽  
Metal Coatings ◽  
Ferrous Metals ◽  
Waste Dumps ◽  
Lead And Zinc ◽  
Useful Components ◽  
Non Ferrous Metals ◽  
Glass Optics

Статья посвящена теме переработки отвалов рудника Байжансай в Туркестанской области, который, в настоящее время, является местом отходов полиметаллической руды в количестве примерно 6,5 тонн. В материале рассматривается потенциальная возможность применения данных отходов для извлечения полезных компонентов, таких как из цветных металлов - свинец и цинк, из благородных серебро и из редкоземельных - германий, индий, селен, теллур и таллий. При использовании данной переработки можно не только снизить негативное влияние отходов на окружающую среду, но и добыть полиметаллические руды, которые можно использовать в производстве стекол, оптики, в производстве высокоответственных подшипников для двигателей, для защиты антикоррозионных металлопокрытий и во многих других сферах, указанных в данной статье. Авторами было изучено технологическое решение по переработке отходов Байжансая. На основании полученных данных, была разработана технологическая модель, сочетающего в одном аппарате процессы электрохимической активации воды, флокуляции, газонасыщения и разделения микропримесей редких и рассеянных элементов (РРЭ), цветных металлов из технологических растворов и жидких техногенных отходов. Данный модуль является аналогом "классического" аппарата, но преимуществом предложенного модуля является меньшая энерго затратность, более эффективная работа по временным аспектам и по габаритам. The article is devoted to the topic of processing the dumps of the Baizhansai mine in the Turkestan region, whichis a place of waste of polymetallic ores in the amount of about 6.5 tons. The article discusses the potential use of these wastes for the extraction of useful components, such as non-ferrous metals - lead and zinc, precious silver, and rare-earth metals - germanium, indium, selenium, tellurium and thallium. With the use of this processing, it is possible not only to reduce the negative impact of waste on the environment, but also to extract polymetallic ores that can be used in the production of glass, optics, in the production of highly critical bearings for engines, to protect anti-corrosion metal coatings and in many other areas specified in this article. The authors studied the technological solution for the processing of waste from Baizhansai. Based on the data obtained, the authors of the article have developed a technological module that combines in one apparatus the processes of electrochemical activation of water, flocculation, gas saturation and separation of trace impurities of rare and trace elements (RRE), non-ferrous metals from technological solutions and liquid man-made waste. This module is analogous to the "classical" apparatus, but the advantage of the proposed module is lower energy consumption, more efficient work in terms of time and dimensions.

scholarly journals DISPOSAL OF LEAD PRODUCTION WASTES BY EXTRACTION OF LEAD AND ZINC OXIDES

2021 ◽  
Vol 2 (446) ◽  
pp. 37-44
Author(s):  
Zarina Bagova ◽  
Kurmanbek Zhantassov ◽  
Gaukhar Turebekova ◽  
Bayan Sapargaliyeva ◽  
Shermakhan Shapalov
Keyword(s):  
Negative Impact ◽  
Ferrous Metal ◽  
Selective Extraction ◽  
Toxic Waste ◽  
Metal Compounds ◽  
Zinc Oxides ◽  
Ferrous Metals ◽  
Lead And Zinc ◽  
Lead Production ◽  
Non Ferrous Metals

Information is given about the need to dispose of waste from the Shymkent lead plant in the form of slags, which have accumulated about 2 million tons. It is proved that lead production slags contain a large number of toxic compounds, such as lead, zinc, osmium, and cadmium, which are dangerous sources of environmental pollution. According to the results of X-ray diffractometric analysis and DTA, it was found that the slag of lead produc- tion contains a fairly high number of non-ferrous metal compounds: the content of lead oxide up to 2 %, zinc oxide up to 17% and copper oxide up to 1.25% of the total weight of the sample. The qualitative composition and content of non-ferrous metals of lead slags makes it possible to make the process of recycling toxic waste from lead production technically and economically feasible. The results of preliminary tests allow us to select a technology for more complete and selective extraction of lead and zinc oxides from the slag waste of lead production. When using a selective method for extracting non- ferrous metals, it is expected to improve the ecological state of the environment and reduce the negative impact on human health due to the disposal of toxic slags from lead production. At the same time, a significant contribution is made to the development of the system of rational use of natural and secondary resources.

scholarly journals DEVELOPMENT OF TECHNOLOGY FOR THE EXTRACTION OF LEAD AND ZINC OXIDES FROM DUST AND SLAGS DURING THE UTILIZATION OF LEAD PLANT WASTE

2021 ◽  
Vol 2 (446) ◽  
pp. 81-85
Author(s):  
K. Zhantassov ◽  
Z. Bagova ◽  
G. Turebekova ◽  
B. Sapargaliyeva ◽  
G. Pusurmanova
Keyword(s):  
Negative Impact ◽  
Raw Materials ◽  
Selective Extraction ◽  
Optimal Method ◽  
Ferrous Metals ◽  
Lead And Zinc ◽  
Maximum Permissible Concentrations ◽  
Lead Production ◽  
Non Ferrous Metals ◽  
State Of The Environment

The object of the study is lead-containing slag dumps from a lead plant. The slags of the lead plant contain a large number of toxic compounds: lead, zinc, osmium, cadmium, which are dangerous sources of environmental pollution. Due to the open storage of slags, it was found that the maximum permissible concentrations of lead were exceeded. Utilization of lead production slags allows to obtain non-ferrous metals and to reduce the technogenic load on the environment as a result of processing of slags. At the same time, slags are valuable raw materials containing compounds of non-ferrous and rare-earth metals. The article proposes methods for the extraction of lead and zinc from slag waste and selects the optimal method for the selective extraction of zinc and lead oxides from dust and slags of lead production. The proposed technology of continuous carbon-free selective extraction of zinc and lead from the dust of electric steelmaking production allows the use of lead production slag, which is fed into a rotating drum furnace in two oppositely directed streams. During the movement of lead slag in the furnace drum and the burning of the torch, lead and zinc are more completely extracted from the dust-like material, where the transporting object is compressed air, and the purified flue gas after the gas is further purified by means of a smoke pump is released into the atmosphere. When using the proposed selective method for extracting non-ferrous metals, the ecological state of the environment will be improved, and it will also reduce the negative impact on human health due to the disposal of toxic slags from lead production.

scholarly journals A Study on the Synergistic Change of Non-ferrous Metal Futures and Stock Prices in China—Based on the Complex System Synergy Degree

2019 ◽  
Vol 267 ◽  
pp. 04009
Author(s):  
Qingxin Kong ◽  
Shangde Gou
Keyword(s):  
Stock Prices ◽  
Composite System ◽  
Negative Impact ◽  
Ferrous Metal ◽  
Futures Market ◽  
2008 Financial Crisis ◽  
Ferrous Metals ◽  
Metal Market ◽  
Non Ferrous Metals ◽  
The 2008 Financial Crisis

Based on the synergetics perspective, this paper constructs a composite system of non-ferrous metal futures and stock prices, using MATLAB to analyze the data of 3405 trading days from 2004 to 2018 in China. The empirical results show that non-ferrous metal stock prices are generally more orderly than futures prices in the selected period; the price discovery function of aluminum futures is worse than that of copper and zinc; and the 2008 financial crisis has an indelible negative impact on the coordination of China's non-ferrous metals futures market. Finally, this paper discusses whether there are representative metals in the non-ferrous metal market, and makes a brief summary.

scholarly journals Predictive Analysis of Waste Co-Combustion with Fossil Fuels Using the Life Cycle Assessment (LCA) Methodology

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3691 ◽  
Author(s):  
Pikoń ◽  
Krawczyk ◽  
Badyda ◽  
Bogacka
Keyword(s):  
Environmental Impact ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Ecological Impact ◽  
Predictive Analysis ◽  
Lca Methodology ◽  
Ferrous Metals ◽  
The Status ◽  
Non Ferrous Metals ◽  
Waste Mixture

The use of waste for energy purposes could become widespread and the radical lowering of the costs associated with that process could occur, if the resulting fuel did not have the status of waste. The key issue in removing the status of waste for a given substance is to eliminate the environmental impact of its use. Currently, there are no known fuels whose combustion does not lead to a negative impact on the environment, even to a minimum extent. It is therefore necessary to set a threshold of environmental impact at which we “recognize” a fuel to be harmless to the environment. The ecological impact of lignite was assumed in this text to be such a threshold. This paper proposes a methodology for determining the limit of environmental impact of fuel from waste. It also presents the results of our own research on the morphological and elemental composition of a waste mixture created by the separation of the over-screen fraction of municipal waste undesirable for a fuel, namely, chlorine carriers (PVC), multi-material waste, ferrous and non-ferrous metals, and non-combustible fractions (ash). The results obtained were used to assess the relative environmental impact of a waste mixture used as fuel.

scholarly journals ECOLOGICAL ASPECTS OF THE TECHNOGENIC DEPOSITS PRESERVATION OF NON-FERROUS METALS IN THE NORTH CAUCASUS

2021 ◽  
Vol 13 (2) ◽  
pp. 265-272
Author(s):  
Ivan ALBOROV ◽  
◽  
Fatima TEDEEVA ◽  
Olga BURDZIEVA ◽  
◽  
...  
Keyword(s):  
Negative Impact ◽  
Raw Materials ◽  
Ferrous Metal ◽  
Industrial Building ◽  
North Caucasus ◽  
Mountain Rivers ◽  
The North ◽  
Ferrous Metals ◽  
Non Ferrous Metals ◽  
Waste Deposits

The article presents the results of research on a comprehensive assessment of techno genic waste deposits located in the North Caucasus region, gives a brief description of the material composition of techno genic raw materials, element-by-element quantitative reserves that are part of the accumulated secondary georesources for their possible utilization, production of non-ferrous metals and raw materials for the manufacture of industrial building materials. The article considers the sanitary and ecological parameters of the functioning of man-made raw materials in complex orographic, meteorological and geographical conditions. The critical aspects of the preservation of techno genic waste deposits in the current anthropogenic conditions are identified. The risk factors for the removal of toxic and harmful geomaterials into the water area with significant harm to the flora and ichthyofaunal are identified. For a deeper assessment of the minerals contained in the extracted ore, a unified state register of techno genic waste deposits should be created, Taking into account the high fragmentation of all the above – mentioned process links at the present time , the owners, taking into account the current sanitary and regulatory requirements, must take adequate measures to ensure the regulatory and environmental requirements in accordance with the current Federal Law “On Production and Consumption Waste”. The need for complex processing of waste from mining and processing industries in the North Caucasus is also dictated by environmental aspects due to the high risk of the occupied territories (they are located in floodplain terraced areas of mountain rivers) due to the flooding of mountain rivers, including the high vulnerability of resort and recreational and balneological complexes due to the negative impact of these negative sources. The assessment of the useful components contained in the extracted ore is currently not carried out in full, and the accumulated waste from processing non-ferrous metal ores is used in small volumes.

scholarly journals Behavior of Сu, Zn, Pb, As compounds during copper-zinc concentrate and matte comelting in converters

2020 ◽  
pp. 11-18
Author(s):  
N. K. Dosmukhamedov ◽  
E. E. Zholdasbay ◽  
A. A. Argyn ◽  
M. B. Kurmanseitov
Keyword(s):  
Elemental Sulfur ◽  
Iron Sulfide ◽  
Converter Slag ◽  
Metallic State ◽  
Ferrous Metals ◽  
Lead And Zinc ◽  
Copper Zinc ◽  
Non Ferrous Metals ◽  
Copper Lead ◽  
Zinc Concentrate

The practicability of improving the existing technology of converting copper mattes by comelting with the difficult-toprocess high-sulfur copper-zinc concentrate. The basis for research in the behavior of non-ferrous metals, arsenic and antimony is thermodynamic analysis of the reactions of matte components, converter slag and copper-zinc concentrate interaction in the temperature range 1073–1573 K. The behaviour mechanism of copper, zinc, lead, arsenic, and antimony compounds during co-processing of copper-zinc concentrate with matte is established. High values of the Gibbs free energy of reactions of interaction between oxides of lead and zinc with elemental sulfur, sulfides of non-ferrous metals and iron show the feasibility of the highest possible extraction of lead and zinc into dust in the form of their volatile compounds: sulfides, as well as oxides of lead and zinc in the metallic state in the form of gas. There is shown the possibility of the highest possible extraction of arsenic and antimony into dust by means of converting their nonvolatile pentavalent oxides (As2O5, Sb2O5) into volatile trivalent oxides (As2O3, Sb2O3) and non-toxic sulfides (As2S3, Sb2S3) by the converter slag sulfidizing with the components of copper–zinc concentrate: elemental sulfur and iron sulfide. Direct processing of copper-zinc concentrate in converter allows selective extracting copper into matte as well as lead and zinc into a rich semiproduct suitable for their extraction by existing technologies. It is shown that a significant quality improvement of the resulting converter slag and blister copper is achieved by the high sublimation of arsenic and antimony into dust under conditions of converting copper-lead mattes together with a high-sulfur concentrate.

scholarly journals Simulation of combined reduction of iron and non-ferrous metals (nickel, copper, lead and zinc) from oxide melts by converted methane

2020 ◽  
Vol 24 (5) ◽  
pp. 1113-1125
Author(s):  
Alexander Vusikhis ◽  
◽  
Leopold Leontiev ◽  
Evgeniy Selivanov ◽  
Viktor Chentsov ◽  
...  
Keyword(s):  
Metallic Phase ◽  
Second Stage ◽  
Ferrous Metals ◽  
Maximum Value ◽  
Reduction Of Iron ◽  
Lead And Zinc ◽  
Nickel Copper ◽  
Non Ferrous Metals ◽  
Copper Lead ◽  
Oxide Melts

The purpose of the article is to assess the application possibility of methane of various conversion methods (СО2, Н2О, О2) for combined reduction of iron and non-ferrous metals (nickel, copper, lead and zinc) from B2O3-CaO-Fe2O3-МеО oxide melts in the temperature range of 1273-1673 K. Thermodynamic modeling is carried out using a technique, which allows to estimate the variations in phase compositions depending on the amount of the reducing agent induced. The technique differs from the known ones by sequential calculation cycles with the removal of the formed gases and the metal phase from the working fluid composition. It is found that regardless of gas composition the process goes on in several stages. In the case of the combined reduction of iron and nickel (lead or zinc), the first stage is reduction of Fe2O3 to Fe3O4 and FeO. The content of Fe2O3 decreases, while the contents of FeO and Fe3O4 increase (at the end of the stage the content of Fe3O4 reaches its maximum value). At the second stage, there is the transition of Fe3O4 → FeO when the values of the contents of Fe2O3 and Fe3O4 decrease to negligible values. The third stage features the manifestation of the metallic phase. In the case of the combined reduction of iron and copper, the process can be divided into three stages according to the variations of the content of iron oxides, and into two stages according to the variations of the content of CuO and Cu2O. The first stage of iron reduction ends at the moment when the content of magnetite reaches its maximum value, the second stage finishes when the metallic phase appears. The first stage of copper reduction includes the transition of CuO to Cu2O and achievement of the maximum value of Cu2O content. The second stage includes the reduction of copper from Cu2O. A gas with the increased content of hydrogen, which corresponds to methane steam reforming is shown to be the most effective reducing agent. The results obtained make it possible to predict the parameters of the metal reduction process during oxide systems bubbling by methane conversion products. The results will be useful for the development of technologies for selective reduction of metals.

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