INFLUENCE OF MnO ON REDUCTION OF TiO_2 IN BLAST FURNACE TYPE SLAG

摘要

A study was carried out on the formation of Ti（C,N） during smelting vanadium-bearingtitanomagnetite in blast furnace and the influence of MnO content on reduction of TiO₂ inthe slag containing high titania. The reduction of TiO₂ is restricted by MnOpredominantly atthe slag-metal interface and no more at the slag-coke one. The formation of Ti（C,N） is remarkablyrestricted by MnO in the slag when the MnO content is about 4% and the basicityfrom 0.6 to 1.2 in the slag. MnO may also retards the reduction of SiO₂ and accelerates thedesulphidation under certain condition.