METHOD OF PROCESSING GOLD-CONTAINING ORES Russian patent published in 1997 - IPC

FIELD: goldmine industry. SUBSTANCE: invention relates to recovering gold by heap leaching technique. Method includes crushing ore, gravitational enrichment of ore to produce graviconcentrates and gravitation tails, formation of ore pile, and subsequent heap leaching with cyanide solutions. According to invention, graviconcentrate is subjected to cyanidation in a separate cycle to produce commercial gold-containing deposits, cyanidation cakes, and gold-free solutions, whereas gravitation tails are directed to form ore pile. Graviconcentrate cyanidation cakes in common with gravitation tails are directed to form ore pile, and gold- free solutions are directed into heap leaching process. EFFECT: enhanced efficiency of process. 3 cl, 2 tbl, 1 dwg