试验在LaCrO3高温电阻炉中模拟研究了1873K时,超低碳铝硅镇静钢冶炼过程中锰元素在钢包渣与钢液间的分配平衡,考察了影响锰在钢包渣与钢液间分配比的因素.试验得出,渣中的FetO含量对锰的分配比有显著影响,FetO的质量分数在0～20％的范围内,随着FetO含量的增加,锰的分配比不断增加.在0.5～5.0的炉渣碱度范围内,当炉渣碱度增加时,锰的分配比先降低后增大.随着渣中Al2O3含量的增加,锰的分配比LMn先降低后增加.为了提高锰合金的收得率,FetO的质量分数应该维持在5％以下,Al2O3的质量分数在20％～25％之间,同时wCaO/wSiO2比值在2.5左右.在所使用的4种改质剂(CaC2+Al2O3,Al+ CaC2,Al+ CaCO3,Al+CaO)中,Al+CaO改质剂的效果最好,得到的LMn最小.
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