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J. Compos. Sci.
Volume 8
Issue 9
10.3390/jcs8090367
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Article

Preliminary Removal of Mercury from Depleted Coal Sorbents by Thermal Vacuum Method with Associated Extraction of Precious Metal Composite

by
Bagdaulet Kenzhaliyev
1,
Sergey Trebukhov
1,*,
Valeriy Volodin
1,
Alina Nitsenko
1,
Yerkebulan Kilibayev
2,
Olga Kolesnikova
3,* and
Xeniya Linnik
1
1
Institute of Metallurgy and Ore Beneficiation JSC, Satbayev University, Almaty 050010, Kazakhstan
2
Department of Standardization, Certification and Metrology, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan
3
Department of Science, Production and Innovation, M. Auezov South Kazakhstan University, Shymkent 160012, Kazakhstan
*
Authors to whom correspondence should be addressed.
J. Compos. Sci. 2024, 8(9), 367; https://doi.org/10.3390/jcs8090367
Submission received: 21 July 2024 / Revised: 4 September 2024 / Accepted: 13 September 2024 / Published: 18 September 2024
(This article belongs to the Section Metal Composites)
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Abstract

This paper presents the results of laboratory studies for the distillation of mercury from depleted coal sorbents produced in gold recovery factories using CIP technology. The mercury content in these materials is more than 1%. The developed technology was tested in a large-scale laboratory on a pilot vacuum sublimation electric furnace with the rheological movement of dispersed material. The use of this equipment makes it possible to demercurize various materials with fairly high moisture (up to 20%). It eliminates the use of an additional technological operation—drying the material in a vacuum drying oven. It has been shown that a high degree of mercury distillation is achieved (more than 99.8%) at 350–400 °C in the reaction space and residual pressure in the system of less than 1.33 kPa, with residual mercury content in the material of less than 0.001% (10 mg/kg), which complies with the European environmental standards. Mercury-free coal sorbents are sent for combustion for the additional extraction of precious metal composites. The proposed vacuum technology is characterized by its environmental safety because the process is performed in sealed equipment, eliminating toxic emissions of mercury vapor into the atmosphere. The proposed vacuum technology equipment is characterized by reliability and ease of use.
Keywords: coal sorbent; mercury; vacuum; demercurization; rheology; technology; dispersed material; electric furnace; heating; precious metal composite coal sorbent; mercury; vacuum; demercurization; rheology; technology; dispersed material; electric furnace; heating; precious metal composite

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MDPI and ACS Style

Kenzhaliyev, B.; Trebukhov, S.; Volodin, V.; Nitsenko, A.; Kilibayev, Y.; Kolesnikova, O.; Linnik, X. Preliminary Removal of Mercury from Depleted Coal Sorbents by Thermal Vacuum Method with Associated Extraction of Precious Metal Composite. J. Compos. Sci. 2024, 8, 367. https://doi.org/10.3390/jcs8090367

AMA Style

Kenzhaliyev B, Trebukhov S, Volodin V, Nitsenko A, Kilibayev Y, Kolesnikova O, Linnik X. Preliminary Removal of Mercury from Depleted Coal Sorbents by Thermal Vacuum Method with Associated Extraction of Precious Metal Composite. Journal of Composites Science. 2024; 8(9):367. https://doi.org/10.3390/jcs8090367

Chicago/Turabian Style

Kenzhaliyev, Bagdaulet, Sergey Trebukhov, Valeriy Volodin, Alina Nitsenko, Yerkebulan Kilibayev, Olga Kolesnikova, and Xeniya Linnik. 2024. "Preliminary Removal of Mercury from Depleted Coal Sorbents by Thermal Vacuum Method with Associated Extraction of Precious Metal Composite" Journal of Composites Science 8, no. 9: 367. https://doi.org/10.3390/jcs8090367

APA Style

Kenzhaliyev, B., Trebukhov, S., Volodin, V., Nitsenko, A., Kilibayev, Y., Kolesnikova, O., & Linnik, X. (2024). Preliminary Removal of Mercury from Depleted Coal Sorbents by Thermal Vacuum Method with Associated Extraction of Precious Metal Composite. Journal of Composites Science, 8(9), 367. https://doi.org/10.3390/jcs8090367

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