METHOD OF PREPARATION OF SULFIDE GOLD-CONTAINING CONCENTRATES FOR GOLD EXTRACTION BY CYANIDATION

摘要

FIELD: hydrometallurgy. SUBSTANCE: parent concentrate containing 44.2% pyrrhotine, 50 g/t gold is subjected for bacterial leaching in the presence of sulfur-alkaline solution obtained after alkaline treatment of gold-containing cake of bacterial leaching with sulfur content 10 g/l, pH=12. Sulfur-alkaline solution is fed to the process of bacterial leaching up to pH= 1.8-2.2. Process is carried out for 6 days. Liquid phase with biomass obtained after pulp condensing is separated and fed for bacterial leaching, and gold-containing cake is subjected for alkaline treatment. Prepared sulfur-alkaline solution is fed for bacterial leaching. EFFECT: improved method of concentrate preparation. 1 tbl