| abstract |
FIELD: chemical technology. SUBSTANCE: method involves autoclave oxygen leaching with solution containing sodium hydroxide. Concentrates containing gold and silver and arsenic (above 1.5%) were subjected for leaching with solution that contains additionally soda, at 150-180 C, for 3-6 h at ratio liquid : solid = 5-7, under oxygen pressure 5-10 atm. Using soda pH value in solution is brought about at the range 13-14. EFFECT: improved method of arsenic removing. 2 cl, 2 tbl |