| 摘要 |
FIELD: metallurgy.SUBSTANCE: invention relates to hydrometallurgy of noble metals. Proposed process comprises grinding of stock to not over 90%-grade minus 10 mcm, pressure leaching at oxygen feed at 100-110°C and partial pressure of oxygen of 1.01.5 MPa with production the pulp. Then, pulp is divided into solution and solid residue. Precious metals are extracted from solid residue of pressure leaching by solution containing artificially produced thiosulphate ions by processing of pressure oxidation residue including elementary sulphur by solutions containing sulphite-ion. Note here that concentration of sulphite-ions in solution fed for leaching makes 30-65 g/l. To accelerate dissolution of precious metals leaching is performed at pulp temperature of 20-80°C and medium pH of 5.5-40.5.EFFECT: lower costs, higher yield.10 cl, 4 tbl, 2 ex |
