(PS176 )Novel process to extract Fe-S-C metallic phase from FeTiO3 via sulfurization

摘要

In general, the production of titanium is started by chlorinating high grade rutile ores (TiO2) using the Kroll process. [1] In order to replace expensive rutile ore due to lack of natural resources, it is necessary to utilize abundant and cheaper ilmenite (FeTiO3). On the other hand, the titanium dioxide for production of titanium can be produced from titanium-rich slag by several processes of carbon reduction of natural ilmenite ores more than 1823 K and acid leaching.[2] However, the conventional process is high-energy consumption and cause a large amount of leaching residue. In this study, we propose the novel process to sulfurize FeTiO3 by Na2SO4 less than 1573 K. The Fe in FeTiO3 can be extracted as Fe-S-C metallic phase and FeS based phase, and Ti can be separated into TiO2-Na2O based oxide phase. Then, the influece of temperature and initial ratio of sulfur on the behaviors of Fe, Ti, and Na between metallic phase and FeTiO3 were investigated.