基于感应炉正交实验的钢包脱磷工艺研究

Research on Ladle Dephosphorization Process Based on the Induction Furnace Orthogonal Experiment

为降低提钒后半钢高P含量,减小转炉生产负荷,提出半钢钢包脱磷工艺研究,建立"提钒-脱磷-脱碳"三联冶炼工艺。基于感应炉脱磷四因素三水平正交实验,得出影响脱磷率的因素主次顺序为:供氧流量>渣量>Ca O质量分数>供氧时间,并给出模拟实验下的最优半钢脱磷渣配比与供氧模式,为工业试验提供理论依据。根据感应炉实验结果分析,进行半钢脱磷工业试验,结果表明:大供氧流量与高半钢入炉温度可提高炉渣的脱磷能力。随脱磷渣碱度上升,脱磷率呈先上升后下降的趋势,拐点发生在碱度为3.26时,试验中脱碳量与脱磷量平均比例3.17:1。

To reduce the phosphorus content of the semi-steel and converter production load,dephosphorization in ladle are put forward.Two converters and one ladle are used together,one of converters is used to vanadium extraction and the other is used to decarburization,ladle is used to dephosphorization during intermediate procedures. The result of orthogonal experiments show that the factors affecting the dephosphorization rate,with the order： flow rate of oxygen amount of slag Ca O content blowing time. The model of compositions of slag and oxygen side-blown method has been established for industrial test. And industrial test shows that high oxygen flow rate and high temperature of semi-steel can improve the dephosphorization rate. For the slag basicity,dephosphorization rate showed a trend of decline after rising first,inflexion is 3.26,and average proportion of quantity of decarburization and quantity of dephosphorization is 3.17：1.