REDUCTION OF TITANIUM DIOXIDE IN SMELTING SILICO-TITANIUM FERROALLOY USING TITANIUM-BEARING SLAG BY D. C. SILICOTHERMIC PROCESS

It is studied in this paper that the physico-chemical phenomena of TiO₂ reduction in molten slag under the influence of D. C., and TiO₂ reduction in smelting Si-Ti ferroalloy using slag containing titania by D. C. silicothermic process is referred to due to silicothermic reduction, electrolysis, carbothermic reduction, gravity settling, electrophoresis of metal drops and convection in melting bath. Under the experimental conditions it is conducted to smelt Si-Ti ferroalloy using titanium-bearing slags from blast furnace by electrolysis, silicothermic process and D. C. silicothermic process, and TiO₂ reduction laws in slags under three conditions is achieved. It is shown that the reduction rate, reduction reaction rate constant, metal recovery and titanium recovery by D. C. silicothermic process is higher than that by silicothermic process.