METHOD FOR EXTRACTION OF COPPER FROM SULFIDE AND MIXED (SULFIDE AND OXIDIZED) ORES WITH ASSOCIATED EXTRACTION OF PRECIOUS METALS Russian patent published in 2021 - IPC C22B3/04 C22B15/00 C22B11/00 

FIELD: non-ferrous metallurgy.

SUBSTANCE: invention relates to the extraction of non-ferrous and precious metals from ores, in particular from sulfide and oxidized copper ores. The method includes crushing the ore to a fineness class of -630 + 160 microns, leaching of copper and precious metals with a solution containing, g/l: copper (II) chloride 2-aqueous 200-300, sodium chloride 150-300 or a solution containing, g/l: copper (II) chloride anhydrous 20-100, sodium chloride 100-200, iron (III) chloride 6-aqueous 50-150. The pH of the solution is 1.0 - 1.9. After that, the solid leaching waste from the solution residues is washed with water, sorption, extraction, re-extraction and electrolysis are carried out. Leaching and washing of solid leaching waste from solution residues is carried out in a countercurrent pulsation column, and leaching, sorption and extraction are carried out in a closed cycle.

EFFECT: method provides high degree extraction of metals from ore with the possibility of joint processing of ores of different origin (sulfide and oxidized) in any ratio with the associated extraction of precious metals.

1 cl, 2 dwg, 2 tbl