Equilibrium of [Si]/(SiO2) in Carbothermic Selective Reduction of Titanium Concentrate Ore for the Preparation of Titanium Oxycarbide

Carbothermic selective reduction of titanium concentrate ore for the preparation of titanium oxycarbide was presented and SiO 2 was found to be partly reduced during the process. The equilibrium relationship between Si dissolved in metallic Fe and SiO 2 existed in corresponding slag was analyzed thermodynamically, and then revealed by a series of designed equilibration experiments. The results are in accordance with the calculated values obtained from thermodynamic analysis and have well explained the phenomenon that part of SiO 2 is reduced during selective reduction processing of titanium concentrate ore.