亜鉛揮発回収法の基礎的研究 (続)

抄録

We studied the reducibilities of zinc compounds, such as ZnAl₂O₄and ZnS and of copper slag at Naoshima Smelter underCOatmosphere. These samples and carbon powder were mixed with or without CaCO₃. ZnAl₂O₄was stable and reduced only 30% at 1050°C. ZnS was reduced 90% when mixed with CaCO₃, but only 20% without CaCO₃, but. only 20% without CaCO₃ at 900°C. The reducibility of zinc in Cu-slag was nearly as same that of Pb-slag and ZnFeSiO₄. We also studied the decomposition of Zn-ferrite when heated with CaCO₃and the prevention of formation of Zn-ferrite from mixture of ZnO, Fe₂O₃and CaCO₃. In both cases, free ZnO was leached 60-70% from the samples heated at 1100°C.