Akira Yazawa

Thermodynamic Consideration for Treatment of Complex Sulfide Ores

Several metallurgical processes for the treatment of complex sulfide ores were discussed thermodynamically. Principles of selective leaching process were examined by a few types of equation, and the results are given and discussed in the pH-potential diagrams. The stabilities of metallic copper and various form of sulfates at roasting temperature are illustrated in the isothermal reaction diagrams in which partial pressures of basic components are taken for both axes. The selective sulfatization roasting in practice was ex-