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

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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