1. Research of biochemical gold recovery method using high-arsenic raw materials
- Author
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A. K. Koizhanova, A. N. Berkinbayeva, G. V. Sedelnikova, B. K. Kenzhaliyev, M. N. Azlan, D. R. Magomedov, Y. M. Efremova (Dyo), A. K. Koizhanova, A. N. Berkinbayeva, G. V. Sedelnikova, B. K. Kenzhaliyev, M. N. Azlan, D. R. Magomedov, and Y. M. Efremova (Dyo)
- 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.
- Published
- 2021