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Preliminary communication

Research of biochemical gold recovery method using high-arsenic raw materials

A. K. Koizhanova ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
A. N. Berkinbayeva ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
G. V. Sedelnikova ; JSC «Rosgeologia» Moscow, Russian Federation
B. K. Kenzhaliyev ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
M. N. Azlan ; Physics Department, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjung Malim, Perak, Malaysia
D. R. Magomedov ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
Y. M. Efremova (Dyo) ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan


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Abstract

This article contains the results of experiments to recover gold from complex mineral raw materials containing more than 15 % arsenic. Laboratory tests showed that standard cyanidation recovers only 26,4 % of gold into the solution. Additional oxidizing reagents used increase the leaching efficiency and enable to recover more than 40 % of gold during subsequent cyanidation. The efficiency has been established for replacement of cyanide with thiourea and thiosulfate solutions. 79,5 %, i.e. the maximum recovery rate, was found in the experiment with preliminary oxidation with T. Ferrooxidans, a bacterial culture, followed by leaching with a thiourea solution.

Keywords

hydrometallurgy; biochemical method; arsenic; gold; recovery

Hrčak ID:

256126

URI

https://hrcak.srce.hr/256126

Publication date:

1.7.2021.

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