METHOD FOR PRODUCING METALS, THEIR COMPOUNDS AND ALLOYS OF MINERAL RAW MATERIALS Russian patent published in 1995 - IPC

FIELD: production of metals, their compounds and alloys. SUBSTANCE: ground raw materials are mixed with additives containing pure chemical elements of origin raw materials to prepare charge. Then oxidation roasting is carried out, ratio of pure elements to mentioned above compounds being 1: 1-100: 1, summary content of said additives is not less 5 %. Said roasting takes place at 1400-1600 C in flowing oxygen atmosphere, it is followed by cooling and reduction. Thus prepared solid oxides are mixed with metal reducing agent, their ratio being 1: 0.3-1:0.7. Reduction is carried out at 2000-2300 C. If sulfur-containing ores of iron or barium are used then oxidation roasting is carried out at 1400-1600 C, thus prepared gaseous sulfur oxide is used in sulfuric acid production. Al in this case may be used as reducing agent, summary content of oxides to Al being 1;0.3-1:0.45. EFFECT: improves efficiency of the method. 2 cl, 1 tbl