FIELD: nonferrous metallurgy. SUBSTANCE: cuprous sulfide is loaded into carbonate melt at 873-1520 C, kept for 1-4.5 h, and reduced copper is isolated. According to invention, carbonate melt is supplemented with low-melting metal, for instance, tin. Cuprous sulfide to carbonate melt weight ratio is maintained equal to 0.103-0.163. EFFECT: facilitated reduction process. 4 cl, 2 tbl
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