METHOD OF EXTRACTION OF TIN FROM TIN - CONTAINING RAW MATERIAL Russian patent published in 1994 - IPC

FIELD: non-ferrous metal metallurgy. SUBSTANCE: method comprises steps of treating tin, being extracted from tin-containing raw material, by salt chlorination; then carrying out wet trapping of sublimates, filtering them, separating tin from the filtrate by evaporation of the filtrate; fractioning a deposit by successive heat treatment in temperature range 300-400 C and 450-800 C over 30-60 min, feeding the condensate of the evaporation step to the step for wet trapping of the sublimates, and feeding ammonium chloride and metal chlorides of the heat treatment step to a step for preparing charge or treating up chlorination cinders. EFFECT: enhanced efficiency of extraction. 2 cl