Affiliation:
1. Huazhong University of Science and Technology
Abstract
Pyrite was heat treated on a thermo-gravimetric reactor (TGR) and a drop tube furnace (DTF) in CO2/N2 mixtures with different CO2 concentrations. The effects of CO2 on pyrite transformation were investigated. The reaction products were characterized by XRD and XRF. The results show that, the presence of CO2 can promote pyrite desulfurization and oxidation at 900°C and 1500°C. Pyrite oxidation seems to increase with CO2 concentration. TGR results show that hematite and magnetite are the final iron products at 900°C and higher CO2 concentration. DTF reaction samples generated at 1500°C with the presence of CO2 contain pyrrhotite and magnetite, indicating incompletion of pyrite desulfurization/oxidization due to a short residence time.
Publisher
Trans Tech Publications, Ltd.
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