METHOD FOR COMPLEX PROCESSING OF POLYMETALLIC RAW MATERIALS Russian patent published in 2002 - IPC

FIELD: non-ferrous metallurgy, possibly processing of plumbum, antimony, polymetallic and gold-containing sulfide concentrates. SUBSTANCE: method for complex processing of polymetallic sulfide raw materials of heavy, non-ferrous and noble metals comprises steps of their separate melting in furnace with deep bath at presence of mixed salts of alkali metals and carbon-containing reducing agent for receiving rough metals to be further processed by well known methods, slag, matte or slag-matte melts; using slag-matte melts after melting plumbum raw material as flux for melting antimony raw material; using matte or cake after leaching matte of melting antimony raw material as raw material at melting plumbum or noble metal raw material; blending plumbum raw material and raw material of noble metals with mixture including soda ash and(or) potash; feeding it for melting in order to produce crude plumbum concentrating noble metals, and slag-matte melt supplied for melting antimony raw material; blending antimony raw material with slag-matte melt after melting plumbum raw material and feeding for melting in order to receive slag, matte and crude antimony; feeding matte for melting plumbum raw material. Antimony raw material also may be melt to slag and matte. Matte is subjected to processing by well known methods for receiving solution of antimony and cake fed for melting plumbum raw material. Plumbum raw material may be blended with soda ash; produced slag-matte melt is supplied to ore cycle at plumbum-zinc flotation. Plumbum raw material may be also melt in mixture with potash; and then produced slag-matte melt is fed for obtaining sulfatepotassium fertilizers. EFFECT: enhanced ecology, increased degree of complex use of raw materials, improved economical factors of processing antimony raw material. 6 cl, 5 tbl, 9 ex