Preliminary communication

Intensification of copper leaching from heaps using biological oxidation

A. K. Koizhanova ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
D. R. Magomedov orcid.org/0000-0001-7216-2349 ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
E. A. Tastanov ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
B. K. Kenzhaliyev ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan
G. V. Sedelnikova ; JSC «Rosgeologia» Moscow, Russian Federati
A. N. Berkinbayeva orcid.org/0000-0002-2569-9087 ; Satbayev University, JSC “Institute of Metallurgy and Ore Beneficiation”, Almaty, Republic of Kazakhstan

Abstract

The article presents the results of experiments intended to leach copper from ore heaps of complex mineral composition biochemically. The processing of such heaps is complicated due to the presence of oxidized copper minerals among significant fragments of sulfide minerals and iron-calcium silicates. This factor does not allow to perform standard sulfuric acid leaching effectively without the use of additional oxidation catalysts, or to apply beneficiation methods for that kind of raw materials. Use of A. Ferrooxidans bacteria adapted to the composition of the copper dump, as a bio-catalytic agent, significantly accelerates the leaching process and increases the copper recovery degree into the productive solution.

Keywords

hydrometallurgy; copper; leaching; biochemistry; ferrooxidans bacteria

Hrčak ID:

274040

URI

https://hrcak.srce.hr/274040

Publication date:

1.7.2022.

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