Thermodynamic Analysis of Chlorination of Zinc-Bearing Phases in Pyrite Cinder

摘要

Thermodynamic analysis of chlorination of zinc-bearing phases in pyrite cinder was conducted by FactSage thermochemical software. The effects of temperature and main components of pyrite cinder on the chlorination of ZnO and ZnFe_2O_4 were studied. The results show that the presence of CaO and MgO has no effect on the chlorination of ZnO while the starting chlorination temperatures of ZnO decrease from 1525 °C to 1200, 950, 850 °C with the presence of Fe_2O_3, SiO_2, and Al_2O_3, respectively. In contrast, the presence of Fe_2O_3 and MgO has no effect on the chlorination of ZnFe_2O_4 while the starting chlorination temperatures of ZnFe_2O_4 change from 1350 °C to 825, 1075, 1525 °C with the presence of SiO_2, A1_2O_3, and CaO, respectively. The thermodynamic analysis is consistent with the experimental results available in the literature.