【摘要】 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^-3W²-55.1[%Si]_i+53.25[%Si]_i²-1.588W[%Si]_iη_s=46.37+1.53W-0.0142W²+58.5（[%Si]_i-0.4）²R=244.70+0.088W-0.3682t-9.165[%Si]_i+1.396×10^4t2+11.86[%Si]_i²-0.131W[%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。更多还原

【Abstract】 Thermodynamic and kinetic parameters in removing phosphorus,sulphur and niobium from hotmetal using natural soda ash have been studied in laboratory experiments.Removal of phosphorusand sulphur was found to obey second order mathematical model and so was the influence of slagbasicity:η_p=103.54-0.0768t+1.752W+3.785×10^-3W²-55.1[%Si]_i+53.25[%si]²_i-1.588W[%si]_iη_s=46.37+1.53W-0.0142W²+58.5（[%Si]_i-0.4）²R=244.7+0.088W-0.3682t-9.165[%Si]_i+1.396×10^-4t²+11.86[%Si]²_i-0.131W[%Si]_iOxygen potentials in the slag and hot metal were continuously measured by oxygen sensor.These results showed that the chemical reactions in hot metal pretreatment among slag,hot metaland furnace gas are all sensitive to oxygen potential.The slag capacities of phosphorus（C_p）,sul-phur（C₃）and niobium(C_Nbhave been discussed by the measured results of equilibrium oxygenpotential and the distribution coefficients of P,S and N_b have been consequently studied.更多还原