120 t复吹转炉吹氧后氩气搅拌工艺的冶金效果

转炉后吹氩气搅拌工艺可以更进一步促进钢液中的碳氧反应,有效降低转炉冶炼终点的钢液氧含量。通过对120 t复吹转炉的后吹氩气搅拌工艺的工业试验结果表明,后吹氩气搅拌可降低转炉终点碳氧积,底吹流量800 m³/h的氩气搅拌5 min后,[O]从吹氩前的897×10^-6,降至400×10^-6;(FeO)从18.5%降至13.7%,平均[S]从0.009%降至0.005%,平均[P]从0.008%降至0.006%;搅拌3～6 min钢液平均温度降低10～20℃。

Metallurgy Effect of Argon Stirring after Oxygen Blow of an 120 t Top and Bottom Combined Blown Converter

The converter post-blow argon stirring process may further promote carbon-oxygen reaction in liquid,effectively decreases converter end oxygen content in liquid.The results of commercial test of 120 t combined blown converter post-blow argon stirring process show that the post-blow argon stirring process may decreases the converter end carbon-oxygen product,with bottom blowing rate 800 m³/h argon stirring for 5 min,the[O]decreases to 400×10^-6 from 897×10^-6 before argon stirring;the（FeO） decreases to 13.7%from 18.5%;the average[S]decreases to 0.005%from 0.009% and the average[P]decreases to 0.006%from 0.008%;after stirring for 3～6 min,the average temperature of liquid decreases 10～20℃.