Methods for processing oxidized and primary ores of the Kochkovskoe gold deposit in the Transbaikal territory

The Kochkovskoe deposit is located in the Gazimuro-Zavodsky district of the Transbaikal territory and spreads over the area of 2.4 km2. Exploration and appraisal surveys of the Kochkovskoe deposit in 2012–2016 revealed process-oriented types of ore—oxidized ore and primary ore. The main valuable component of the deposit is gold, and silver is the associated component. Ores differ in chemical composition and extractability during processing by different methods. It is expected that geological exploration and pilot trials of agitation leaching (cyanidation), as well as semi-commercial tests and operational exploration will specify the interfaces of the ore types and the methods of ore mining. As the most rational scheme for processing primary ores of the Kochkovskoe deposit, we recommend flotation and treatment of flotation concentration by cyanidation with preliminary alkaline autoclave oxidation. For processing oxidized ores of the Kochkovskoe deposit, heap leaching with carbon adsorption recovery of precious metals is assumed as a promising option.

Keywords: Kochkovskoye gold Deposit; oxidized and primary ores; test studies of agitation leaching (cyanidation); persistent nature of the Kochkovskoye Deposit ores; regularities between the degree of gold extraction by direct cyanidation and the oxidation zone; study of the concentrability of oxidized ores by percolation leaching; gold extraction by direct cyanidation; scheme with an open cycle of gold extraction into an intercycle flotation concentrate.

For citation:

Barabasheva E. E., Pikatova M. V. Methods for processing oxidized and primary ores of the Kochkovskoe gold deposit in the Transbaikal territory. MIAB. Mining Inf. Anal. Bull. 2021;(3-2):110-117. [In Russ]. DOI: 10.25018/0236_1493_2021_32_0_110.

Acknowledgements:

About authors:

Barabasheva E. E.¹, Cand. Sci. (Eng.), Associate Professor, e-mail: barabasheva@mail.ru;
Pikatova M. V.², resource geologist, e-mail: masha.pikatova@mail.ru;
¹ Transbaikal State University, Chita, Russia;
² «Mangazeya mining LLC», Chita, Russia.

 

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