Abstract
To develop an efficient recovery process of zinc from various secondary resources, release behavior of zinc from dusts and etfect of coexisting elements on carbon reduction were investigated with the addition of Prima coal as a reducing agent Change in zinc form in the dusts with temperature was clarified by a sequential leaching analysis. Two kinds of zinc dust were used which contained ZnO and ZnFe_2O_4 as major zinc components, respectively. The release extents of zinc for dusts were higher than that for ZnO reagent and achieved to 99% at 1273 K. Formation of iron compounds was observed for dust A from 1073 K. Volatilization of zinc was accelerated by FeO and Fe above 1173 K. The release of zinc from dust B was affected by coexisting chloride, fluoride, and lead in the sample.
