Some problems of processing dispersed arsenic-containing raw materials by sublimation in vacuum

Володин, В. Н.; Trebukhov, S. A.; Nitsenko, A. V.; Trebukhov, Alexey; Tuleutay, Farkhat

doi:10.1088/1742-6596/2059/1/012026

Cited by 4 publications

(3 citation statements)

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“…We have not found analogs of such equipment. All technical solutions have patents from the Republic of Kazakhstan [53][54][55][56].…”

Section: Discussionmentioning

confidence: 99%

“…However, when analyzing the technical design of the process of vacuum thermal processing of dispersed raw materials, some problems can be identified [41], including those related to the thermal and corrosion resistance of special steels in vibro-vacuum furnaces. It was noticed that over time, sulfidation of the alloy steel of the conveyor occurs, which leads to a reduction in its service life.…”

Section: Dearsenation Of Gold-arsenic Concentrates On a Vibro-vacuum ...mentioning

confidence: 99%

See 1 more Smart Citation

Dearsenation of Gold-Bearing Composite Concentrates without Forced Displacement in a Sublimator

Trebukhov,

Volodin,

Nitsenko

et al. 2023

J. Compos. Sci.

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The primary devices for extracting volatile components from dispersed materials in a vacuum are devices with the movement of raw materials by directed vibrations. During the analysis of the operation of such installations, some shortcomings were identified, due to the supply of heat flow to the processed raw material and the requirements for the choice of structural materials. In this article, the authors tested a heating method and a design of a sublimator with the supply of heat flow to the dispersed material by radiation from the heater. The sublimation zone is made in the form of a shaft formed by simple-shaped plates, the design and material of which involve the use of refractory and ceramic materials that are inert with respect to an aggressive vaporous sulfide medium. The movement of bulk material through the volume of the sublimator occurs due to rheological properties: sliding along inclined plates. Technological tests on the sublimation of arsenic sulfides from gravity and flotation composite concentrates of the Bakyrchik deposit (Kazakhstan) have shown the possibility of a high degree of sublimation of arsenic (more than 96–99%) while preserving precious metal composites in the sublimation residue and stable operation of equipment. Sublimation residues containing 0.14–0.30% As can be processed by known methods. The possibility of sufficiently complete removal of arsenic and its compounds from composite concentrates at a reduced pressure with the removal of the latter in the most environmentally friendly sulfide form has been established.

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“…We have not found analogs of such equipment. All technical solutions have patents from the Republic of Kazakhstan [53][54][55][56].…”

Section: Discussionmentioning

confidence: 99%

Section: Dearsenation Of Gold-arsenic Concentrates On a Vibro-vacuum ...mentioning

confidence: 99%

Dearsenation of Gold-Bearing Composite Concentrates without Forced Displacement in a Sublimator

Trebukhov,

Volodin,

Nitsenko

et al. 2023

J. Compos. Sci.

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show abstract

“…The scheme of the first version of the sublimation unit intended to process dispersed materials and the principle of its operation are considered and given by us in [20]. Further design developments were aimed to simplify the manufacturing process of inclined surfaces, where the processed material descends, their placement, and mounting of the column in the sublimator volume.…”

Section: Experimental Partmentioning

confidence: 99%

Vacuum sublimators with rheological displacement of the dispersed medium

Trebukhov¹,

Володин²,

Nitsenko³

et al. 2022

KIMS/CUMR/MShKP

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Based on the analysis of designs and technological processes carried out in vacuum electric furnaces developed to date for the processing of dispersed materials by sublimation of volatile components from them, and problems associated with technological processes, technical solutions are proposed in the present work in which the movement of concentrate is carried out due to rheological properties with direct heating by radiation from the heater to the surface of the transported and mixing raw materials. During the development of the equipment, a concept was adopted in which the movement of material in the sublimation zone of the furnace is ensured due to rheological properties, which opens up the possibility of using materials inert to the sulfide atmosphere and realizing heat transfer by radiation to open areas of dispersed material. Technological tests on sublimation of arsenic sulfide compounds from granulated concentrates of Nezhdaninsky and Bakyrchik deposits have confirmed the prospects of such a constructive design of sublimation processes. The application of the developed equipment in practice will ensure the technical and economic efficiency of production in compliance with all environmental requirements with minimal impact on the environment, which is currently a fundamental indicator when choosing a particular technology.

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Arsenic Vapor Condensation in the Vacuum-Thermal Dearsenation Process of Gold Concentrate

Trebukhov,

Volodin,

Nitsenko

et al. 2023

Mineral Processing and Extractive Metallurgy Review

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Some problems of processing dispersed arsenic-containing raw materials by sublimation in vacuum

Cited by 4 publications

References 0 publications

Dearsenation of Gold-Bearing Composite Concentrates without Forced Displacement in a Sublimator

Dearsenation of Gold-Bearing Composite Concentrates without Forced Displacement in a Sublimator

Vacuum sublimators with rheological displacement of the dispersed medium

Arsenic Vapor Condensation in the Vacuum-Thermal Dearsenation Process of Gold Concentrate

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