Recovery of Zinc by Reaction between Electric Arc Furnace Dust and Calcium Chloride

The chlorination and volatilization behavior of zinc was investigated by the reaction between ZnO, ZnFe2O4 and CaCl2. Experiments were conducted in a nitrogen atmosphere by using horizontal electric furnace. As a result of changing the ratio of zinc oxide to zinc ferrite at 1000ºC, it was expected that ZnO and ZnFe2O4 were chloride volatilized at the same time. In the kinetic study at 950ºC-1030ºC, Jander’s equation showed the experimental result well in the reaction system of this study, and the activation energy was 237 ± 18 kJ / mol. It was also found that carbon influenced the reaction product determination. FeO and CaFe2O4 were formed in the presence of carbon, and Ca2Fe2O5 was formed in the absence of carbon.