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

摘要： 采用90 t钢包炉研究了铁水中初始硅含量(0.01%～0.61%Si)对铁水(%:3.34～3.90C、0.01～0.15Mn、0.014～0.082P、0.019～0.051S)预处理同时脱除硅、锰、磷、硫的影响。结果表明,铁水初始硅含量高,碳硅氧化的临界温度高,减少了碳的氧化,甚至增加了碳含量;初始硅含量低时,碳硅氧化的临界温度低,[Si]、[C]同时被氧化。铁水初始硅含量高可以提高脱锰和脱硅量,但抑制脱磷和脱硫,导致回硫。

关键词: 初始硅含量, 铁水预处理, 脱除硅、镒、磷、硫