Fundamental Studies on Zinc Fuming Process

Abstract

We studied on the reducibilities of the several zinc compounds such as zinc oxide (ZnO), zinc-ferrite (ZnFe₂O₄), zinc-ferrous-silicate (ZnFeSiO₄) and zinc-silicate (Zn₂SiO₄) which were considered to be existed in lead smelter slag, under CO atmosphere. The samples and carbon powder were mixed with or without CaCO₃. Under these conditions, ZnO, ZnFe₂O₄, ZnFeSiO₄, and Zn₂SiO₄were reduced completely at about 800°, 920°, 1, 050°, and over 1, 150° respectively. By the results of the reducibility of zinc compound in lead slag of Kamioka Smelter, we considered that the greater part of zinc compound contained in slag was zinc-ferrous-silicate.