使用包头铁水和铌渣,测定了铁水预处理温度下的渣-铁平衡状态。同时,使用固体电解质定氧探头测定含碳铁液中α,以计算铌渣中α_(Nb_2O_5)。实验结果表明;在平衡状态下,当[Si]>0.02％,渣中SiO_2/MnO<2时,Nb_2O_5/Nb<4。因此铁水中Si能够在脱Nb之前优先去除。1350℃下的γ_(Nb_2O_5)在10~0—10~(-2)数量级范围内;渣中SiO_2/MnO对Nb的平衡分配比及γ_(Nb_2O_5)有较大影响。
The reaction equilibrium between slag-hot metal containing Nb at temperature of hot metal pretreatment was investigated. Hot metal and slag containing Nb_2O_5 from Baotou was used. Meanwhile, a_([O] in molten iron was measured by means of the elctrolyte oxygen cell technique for calculating a_(Nb_2O_5) in slag. It was shown that when [Si]>0.02％ and SiO_2/MnO<2,at the equilibrium state between slag-hot metal the selective removal of [Si] over [Nb] from Baotou hot metal is quite possible. The range of γ_(Nb_2O_5) values is 10°—10~(-2) at 1350℃. SiO_2/MnO of slag effects considerably on distribution ratio of Nb between slag-hot metal and on γ_(Nb_2O_5).
参考文献
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| [8] | 福沢章.钢铁,1984 |
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