Phase Relations and Distributions of Minor Elements in the Cu-Zn-S, Cu-Zn-Fe-S and Cu-Zn-Pb-S Systems at 1473K

摘要

As a fundamental study of the Warner process, phase relations in the Cu S-ZnS-FeS and Cu_2S-ZnS-PbS pseudo ternary systems and the Cu-Zn-X-S (X:Tc. Pb) systems were determined at 1473 K. In the Cu_2S-ZnS-FeS system, the solubility of ZnS in the liquid phase is considerably small at less than N_(ZnS) = 0.1 in the high Cu_2S and FeS composition ranges. In the Cu_2S-ZnS-PbS system, the solubility "of ZnS in the liquid phase is around N_(ZnS) = 0.1 in the low composition range of PbS. The Raoultian activity coefficients of ZnS in these pseudo ternary systems at 1473 K. which were determined from the obtained phase relation data, are very large at about 10. In the Cu-Zn-S ternary system, the two-phase region consisting of the L_1 alloy phase rich in copper and the L_2 matte phase exists in a considerably wide composition range from N_(Zn) = 0 to about 0.2. The distribution ratios of iron, lead, arsenic, antimony and silver in the matte (L_2) against the alloy (L_1) in the Cu-Zn-S, Cu-Zn-Fe-S and Cu-Zn-Pb-S systems are approximately 6, 0.4, 0.1, 0.05 and 0.4, respectively.