复吹转炉冶炼高磷铁水的试验研究

Study on refiing high phosphorus hot metal by combined blown converter

利用500kg感应炉热模拟顶底复吹转炉，对w（P）=0．28％～2．02％的铁水进行脱磷预处理和炼钢试验研究，结果表明：脱磷预处理期的脱磷率为67％～86％，至炼钢脱碳试验结束时的脱磷率为86％～97％。影响脱磷率的因素主要是炉渣碱度、供氧速度和熔池温度。

The experimental study is carried out on hot metal pretreatment （dephospho- rizatin） and steel-making using w（P） = 0. 28 % -2.02 % hot metal as starting material in a 500 kg induction furnace in simulation of a top-bottom combined blown converter. Results show that the dephosphorization rate of the hot metal arrives at 67 % to 86% in the initial dephosphorization pretreatment stage and upon completion of decarburization in steel-making the dephosphorization rate cliimbs to as high as 86 % to 97 %. The primary factors affecting the dephosphorization rate of the hot metal are basicity of the converter slag, oxygen supply rate and temperature of bath.