Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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MODERN HYDROMETALLURGICAL TECHNOLOGIES FOR PROCESSING REFRACTORY GOLD-BEARING RAW MATERIALS

Boduen A.J. 1 Fokina S.B. 1 Petrov G.V. 1 Serebrjakov M.A. 1
1 National Mineral Resources University
The share of the gold, extracted from simple gold ores in the technological relation, decreases recently. At the same time the share of the gold extracted from persistent ores increases. Effective processing of such ores demands much more difficult and developed schemes including preparatory operations (roasting, bioleaching, autoclave oxidative leaching) before cyanidation. On the basis of the analyzed literature the present paper provides foreign and domestic experience of hydrometallurgical processing of refractory gold-bearing raw materials. Application of hydrometallurgical technologies for processing of persistent gold-bearing raw materials (bio-oxidation and autoclave oxidation) allows to increase extraction of gold and to solve problems with toxic emissions of arsenic in the atmosphere, typical for roasting pyrite-arsenopyrite gold raw materials. Introduction bio-oxidation and autoclave oxidation allowed to process earlier unprofitable gold fields. Future tasks, facing before hydrometallurgical technologies of processing of persistent gold, are stated. They are connected with the solution of environmental issues and reduction of operational and capital expenditure.