Phase Equilibrium and Minor Elements Distribution between SiO_2-CaO-FeO_x-MgO Slag and Copper Matte at 1573 K Under High Partial Pressures of SO_2

摘要

Phase equilibrium between copper matte and SiO_2-CaO-FeO_x-MgO slag with Q=0.35 (Q=mass/100CaO/ (mass/100CaO+mass/100SiO_2)) was investigated at 1573 K under the SO_2 partial pressures of 10.1, 50.7 and 101.3 kPa as a fundamental study for thermodynamically discussing oxygen-smelting processes to produce copper. The copper and sul- fur solubilities in the slag were found to be independent of p_so_2 when the matte grade was specified, and it was considered that this behavior was ascribed to the constancy of (po_2/ps_2) against pso_2 at a given matte grade.