Integrated Technology of Gold Ore Processing with Cyanide Substitute
K. K. Razmakhnin1,2
1Chita Division of the Chinakal Institute, Siberian Branch, Russian Academy of Sciences, Chita, Russia
2Environmental Industrial Policy Center, Moscow, Russia
Keywords: Gold ore, deposit, processing, gravity sepearation, flotation, hydrometallurgy, thiocyanate, eco-friendly technology, technological leadership
Abstract
The mineral and chemical analyses of gold ore from one of the largest deposits in Transbaikalia are described. The main valuable component of the test oxidized gold ore type is nonuniform and coarse native gold. The uniformity of size distribution of gold in initial ore is studied. The gold ore dressability was tested using the methods of gravity separation, flotation and hydrometallurgical treatment. From the experimental results, the conclusion is drawn on the expedient applicability of an integrated technology of gold ore processing. The proposed technology of gold ore processing integrates jigging of milled ore, classification, rough-scavenging-recleaner flotation cycles with the subsequent leaching of flotation concentrate and gravity separation concentrate using a thiocyanate-based agent. Gold recovery in the proposed technology totals 96.3%, which is comparable with the recovery efficiency reached in gold cyanidation (97.5%).
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