Recycling of chrysotile-asbestos production waste

Shevko, Viktor; Akylbekov, Yerbol Ye.; Karataeva, Gulnara; Badikova, Alexandra

doi:10.1051/metal/2022050

Cited by 7 publications

(6 citation statements)

References 3 publications

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“…The data revealed in Figure 6 were presented in Table 4, which was supplemented with calculations for scaling and setting up a production flow for processing tailings of a 3.2-million-ton chrysotile-asbestos plant. A plant with an output of 3.2 million tons of chrysotile-asbestos tailings exists in northern Kazakhstan [1,9]. The data revealed in Figure 6 were presented in Table 4, which was supplemented with calculations for scaling and setting up a production flow for processing tailings of a 3.2-million-ton chrysotile-asbestos plant.…”

Section: Results Of Granulometric Analysis Of the Initial Tailsmentioning

confidence: 99%

“…The data revealed in Figure 6 were presented in Table 4, which was supplemented with calculations for scaling and setting up a production flow for processing tailings of a 3.2-million-ton chrysotile-asbestos plant. A plant with an output of 3.2 million tons of chrysotile-asbestos tailings exists in northern Kazakhstan [1,9]. Our estimations for the main stages of the technological chain and the industrial products generated are based on the annual dump-tailing output of the Zhetikara oreprocessing plant, equal to 100 kg.…”

Section: Results Of Granulometric Analysis Of the Initial Tailsmentioning

confidence: 99%

“…The extraction of nonferrous metals from asbestos production waste became a reality relatively recently, and the related technology is constantly improving. The interest in this area is due to the fact that 1) the serpentinite supply is almost inexhaustible and is readily available for processing, and 2) the cost of the raw materials is very low [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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Asbestos Waste Treatment—An Effective Process to Selectively Recover Gold and Other Nonferrous Metals

et al. 2022

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We investigated the potential of tailings generated from chrysotile asbestos fiber production as a source of iron, nonferrous metals, and gold. We proposed the use of granulometric separation and systematically examined different enrichment processes, namely magnetic separation, gravity concentration, and enrichment using a Knelson concentrator, to extract the valuable components. The characterization of the initial tailing samples revealed that it comprises primarily of serpentine, brucite, antigorite, hematite, vustite, sillimanite, and magnesium oxide. Using the suggested enrichment process, we isolated gold, chromite, and nickel-cobalt concentrates as valuable products in addition to magnetite. The new approach exhibited high separation efficiency for iron, nonferrous metals, and gold, allowing their satisfactory extraction.

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Section: Results Of Granulometric Analysis Of the Initial Tailsmentioning

confidence: 99%

“…The data revealed in Figure 6 were presented in Table 4, which was supplemented with calculations for scaling and setting up a production flow for processing tailings of a 3.2-million-ton chrysotile-asbestos plant. A plant with an output of 3.2 million tons of chrysotile-asbestos tailings exists in northern Kazakhstan [1,9]. Our estimations for the main stages of the technological chain and the industrial products generated are based on the annual dump-tailing output of the Zhetikara oreprocessing plant, equal to 100 kg.…”

Section: Results Of Granulometric Analysis Of the Initial Tailsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Asbestos Waste Treatment—An Effective Process to Selectively Recover Gold and Other Nonferrous Metals

et al. 2022

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“…The development of the energy sector of Kazakhstan's industrial and economic activities is inseparable from the global trends of the increasing importance of the environmental aspect in energy processes. Only a smooth, economically sound process of implementing the principles of the "green" economy and energy can establish a favourable balance without generating stressful adverse effects [29,30]. Energy efficiency is inseparable from environmental safety, and this principle should be actively implemented in a phased manner in the thermal power sector in Kazakhstan.…”

Section: Discussionmentioning

confidence: 99%

Development and Research of Technologies to Reduce the Harmful Environmental Impact of Coal-Fired CHP Plants

Torgayev

2023

GEOMATE

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The relevance of this work lies in the need to solve the problem of the negative impact of coal combustion processes on the environment and the development of measures to improve the environmental situation in the fuel and energy complex of Kazakhstan. Purpose of work -analysis of vectors of anthropogenic load on the environment from heat and power enterprises using coal fuel. Also, there is a need to explore possibilities of introduction and application of innovative technological solutions on reduction of quantitative indicators and component composition of pollutant emissions into the atmospheric air. In the process of research, modern technological developments and solutions for minimising the impact of thermal power plants on local environmental conditions and global processes in the atmosphere were analysed, the possibilities of their effective application at thermal power enterprises of Kazakhstan were explored, developed optimal and feasible measures to improve the environmental situation at the current stage of development of the country's fuel and energy sector.

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“…The optimal parameters were determined by combining the horizontal images in one figure. This method was described by us in articles [ [19], [20], [21], [22]].…”

Section: IImentioning

confidence: 99%

Electrothermal processing of chrysotile-asbestos wastes with production of ferroalloy and extraction of magnesium into the gas phase

AKYLBEKOV¹,

Shevko²,

Aitkulov³

et al. 2023

KIMS/CUMR/MShKP

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The article presents the results of an experimental study on the processing of wastes from chrysotile-asbestos production at Kostanay Minerals JSC. An electrothermal technology for the extraction of magnesium and siliceous ferroalloy from the chrysotile-asbestos wastes is proposed. The influence of the amount of coke and steel shavings on the technological parameters of the obtained alloys is determined. The results of derivatographic and SEM analyses of the chrysotile-asbestos waste samples are presented. The studies included planning experiments using the second-order rotatable designs (Box-Hunter plans), graphical optimization of technological parameters, and electric melting of a charge in a graphite crucible using a single-electrode arc furnace. Adequate regression equations were obtained explaining the effect of the amount of coke and steel shavings added to the chrysotile-asbestos waste on the extraction degree of silicon into the alloy and the silicon concentration in the alloy. By the electric melting of the charge, high-quality FS25 grade ferrosilicon with a silicon content of 24.4-29.2% and FS45 grade ferrosilicon with a silicon content of 41.6-45% were obtained. It was established that FS45 grade ferrosilicon with the extraction degree of silicon into the alloy from 75 to 85.4% is formed in the presence of 33.6-38% of coke and 16-20.8% of steel shavings. FS25 grade ferrosilicon is formed in the presence of 30-38% of coke and 29.4-40% of steel shavings; the extraction degree of silicon is 68.6-73.8%.

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Recycling of chrysotile-asbestos production waste

Cited by 7 publications

References 3 publications

Asbestos Waste Treatment—An Effective Process to Selectively Recover Gold and Other Nonferrous Metals

Asbestos Waste Treatment—An Effective Process to Selectively Recover Gold and Other Nonferrous Metals

Development and Research of Technologies to Reduce the Harmful Environmental Impact of Coal-Fired CHP Plants

Electrothermal processing of chrysotile-asbestos wastes with production of ferroalloy and extraction of magnesium into the gas phase

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