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在实验室条件下,用内蒙天然碱进行了包钢铁水的预处理试验,研究了铁水脱磷、脱硫和脱铌的热力学和动力学参数。求出了脱磷率、脱硫率和熔渣碱度的二次回归数学模型:η_p=103.54-0.0768t+1.752W+3.875×10~(-3)W~2-55.1[%Si]_i+53.25[%Si]_i~2-1.588W[%Si]_iη_s=46.37+1.53W-0.0142W~2+58.5([%Si]_i-0.4)~2R=244.70+0.088W-0.3682t-9.165[%Si]_i+1.396×10~(4t2)+11.86[%Si]_i~2-0.131W[%Si]_i此外,用固体电解质氧浓差电池连续测定了渣-铁间和铁水中的氧位,测定结果表明渣-铁-气三相中的氧位变化能较灵敏的反映出反应情况。根据测定的平衡氧位,讨论了熔渣的磷容(c_p)、硫容(c_s)和铌容(C_(Nb))。以 c_p、c_s、c_(Nb)为基础,分析了渣-铁间 P、S、Nb 的分配比。
In the laboratory conditions, with Inner Mongolia natural base of the pretreatment of molten iron and steel, the hot metal dephosphorization, desulfurization and de-niobium thermodynamic and kinetic parameters. The mathematical regression model of dephosphorization rate, desulfurization rate and basicity of slag was obtained: η_p = 103.54-0.0768t + 1.752W + 3.875 × 10 ~ (-3) W ~ 2-55.1 [% Si] _i + 53.25 [% Si] _i ~ 2-1.588W [% Si] _iη_s = 46.37 + 1.53W -0.0142W ~ 2 + 58.5 ([% Si] _i-0.4) ~ 2R = 244.70 + 0.088W-0.3682t-9.165 [ % Si] _i + 1.396 × 10 ~ (4t2) +11.86 [% Si] _i ~ 2-0.131W [% Si] _i In addition, oxygen in slag-iron and molten iron The results show that the change of oxygen level in the slag-iron-gas three-phase can reflect the reaction more sensitively. The phosphorus (c_p), sulfur (c_s) and niobium (c_ (Nb)) contents of the slag were discussed based on the measured oxygen balance. Based on c_p, c_s and c_ (Nb), the distribution ratios of P, S and Nb between slag and iron were analyzed.