METHOD OF PROCESSING SULPHIDE OXIDISED COPPER ORES WITH COPPER AND SILVER EXTRACTION Russian patent published in 2016 - IPC C22B15/00 C22B11/00 C22B3/08 B03D1/00 

FIELD: technological processes.

SUBSTANCE: invention can be used in enrichment of copper and silver for processing of sulphide oxidised copper ores. Before feeding for acid leaching when mixing a bulk concentrate obtained from sulphide-oxidised copper ore, method comprises multi-stage bulk flotation using a sodium sulphide additive. Before first stage of bulk flotation ore is crushed to particles of 140-190 mcm, and tailings are directed to second stage of bulk flotation. Prior to second step, said tailings are ground to particles of 60-90 mcm. Sodium sulphide on stages of bulk flotation is introduced through pre-determined time intervals. Prior to extraction of copper and silver by flotation from cake of concentrate leaching, cake is milled to particles of 20-30 mcm.

EFFECT: technical result is high extraction of copper and silver, as well as obtaining copper concentrate of high quality.

1 cl, 1 tbl, 7 ex