METHOD OF PROCESSING SULFIDE POLYMETALLIC PIRRHOTINE CONTAINING MATERIALS Russian patent published in 1994 - IPC

FIELD: non-ferrous metallurgy. SUBSTANCE: method comprises steps of subjecting aqueous pulp of sulfide polymetallic pirrhotine containing material to a pressure acid leaching under an oxygen pressure at a temperature higher, than a sulfur melting temperature in presence of a hydrocarbon surface active substance and a non-organic compound, containing calcium and sulfur, the last being sulfur with an intermediate valency, upon mass ratio of the sulfur-calcium compound to the hydrocarbon surface active substance no less than 1:10 upon leaching transferring non-ferrous metals to a solution, sulfur - to elemental sulfur, ferrum - to ferrum oxides; depositing non-ferrous metals from pulp solution in the form of sulfides with their subsequent separation and elemental sulfur by flotation way to a collective sulfur-sulfide concentrate, and ferrum oxides - to residues; using compound of calcium and sulfur with the intermediate valency in the form of aqueous solution, acidified up to pH no more, than 6,5; acidifying the solution containing sulfur-calcium compound, for example by a final pulp of pressure acid leaching. EFFECT: simplified procession process. 3 cl, 1 tbl