材料期刊网

在复吹转炉铁水消耗1050 kg/t(钢)，铁水磷质量分数小于0.150%条件下，采用单渣法高拉碳工艺进行试验研究，实现了出钢碳质量分数大于0.40%，磷质量分数小于0.020%。分析了高拉碳的操作控制难点是脱磷效率低、易喷溅和终点拉碳时机难以精确掌握。为此，对转炉操作抢位、氧压、底吹流量以及终点控制等方面进行了调整试验，试验结果表明：高枪位配合合适的底吹压力在提高脱磷效率的同时能有效控制喷溅；建立高碳出钢终点判断模型，能将碳命中率提高到90%以上。该工艺实施后，转炉终点游离氧保持在约100×10-6。

In order to achieve w(C)>0.4% and w(P)<0.02% at tapping, a single-slag decarburization process at the con-dition of 1 050 kg/t consumed by hot metal and w(P)=0.15% was developed. Lower dephosphorization, splashing and dif-ficulty of pulling carbon time is the most difficult point of the process. Therefore, the adjustment test on the converter oper-ation taking place, oxygen pressure, the flow of bottom blowing and the end control are taken. Experimental results indi-cate that splashing can be efficiently controlled while improving the dephosphorization efficiency with suitable bottom blowing pressure. The carbon percentage increased to more than 90%by establishing high carbon tapping end-point judg-ment model. After the implementation of the process, BOF end-point free oxygen is maintained at about 100×10-6.