METHOD OF CONCENTRATING PERSISTENT GOLD-CONTAINING SULFIDE ORES Russian patent published in 1999 - IPC

FIELD: gold-mining industry. SUBSTANCE: in a method including grinding of ore concentrate with fineness up to 55% class -0.020 mm to fineness 98-99% class -0.020 mm and sorption cyanidation, ore, prior to be ground, is conditioned and then floated, and sorption cyanidation rejects are conditioned with sulfhydryl collector and frothing agent at sodium cyanide concentration in pulp 0.04 to 0.20%, after which nonferrous metal sulfides containing finely imbedded gold are isolated into froth product. EFFECT: increased completeness of ore utilization due to involving sorption cyanidation rejects into ore processing. 2 cl, 2 tbl