关键词: 初始硅含量, 铁水预处理, 脱除硅、镒、磷、硫

Abstract: The effect of initial silicon content (0. 01% ~0. 61% Si) in metal ( % : 3. 34 ~ 3. 90C, 0. 01 ~0. 15Mn, 0. 014 ~0. 082P, 0. 019 ~0. 051S) on simultaneous removal of silicon, manganese, phosphorus and sulphur during metal pretreatment process has been studied by using a 90 t ladle furnace. Results show that with higher initial silicon content the critical temperature of oxidation of carbon and silicon is higher, led to decrease of the oxidation of carbon even increase of the carbon content in metal; and with lower initial silicon content the critical temperature of oxidation of carbon and silicon is lower, and the [Si] and [C] are oxidized simultaneously； and with higher initial silicon content the amount of removal of silicon and manganese increases, but dephosphorization and desulphurization are suppressed led to resulphurization.

Key words: Initial Silicon Content, Metal Pretreatment, Removal of Silicon, Manganese, phosphorus and Sulphur