METHOD OF GOLD EXTRACTION FROM PERSISTENT ORES AND CONCENTRATES Russian patent published in 1998 - IPC

Abstract RU 2119963 C1

FIELD: hydrometallurgy, gold extraction. SUBSTANCE: method involves oxidative ore opening with an aqueous solution of sulfuric and nitric acid in the presence of oxygen. Gold is dissolved simultaneously and process is carried out in an aqueous solution containing 0.7-2.8 mole/l sulfuric acid, 0.14-2.2 mole/l nitric acid and 0.001-0.14 mole/l hydrochloric acid at 20-90 C under atmosphere pressure or that increased to 7 atm. Oxidative ore or concentrate opening is carried out before conversion of 20-75 weight % the parent gold-containing raw to solution. EFFECT: increased effectiveness of method, improved safety and ecology. 2 cl, 2 tbl

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RU 2 119 963 C1

Authors

Bljumberg Eh.A.

Son S.B.

Dates

1998-10-10Published

1997-08-26Filed