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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Authors
Dates
1998-10-10—Published
1997-08-26—Filed