通过对两种IF钢冶炼工艺路线生产成本比较,提出了IF钢冶炼的最佳工艺路线为:铁水预处理→BOF→RH→CC。基于该工艺路线,并结合IF钢生产实践,通过比较不同转炉终点碳含量对转炉炉况、吹氧时间、转炉吹损及出钢氮含量的影响,得出了降低冶炼成本的转炉最佳终点控制目标:碳质量分数控制在0.04%~0.06%,出钢温度在1 700℃以上。 By comparing the production costs of the two kinds of IF steel smelting process route, the best technological route of IF steel smelting is proposed as follows: hot metal pretreatment → BOF → RH → CC. Based on the process route and the production practice of IF steel, the optimal ending point of converter for smelting cost reduction was obtained by comparing the effect of carbon content of different converter end-points on converter condition, oxygen injection time, converter blow loss and tapping nitrogen content Control objectives: control of carbon mass fraction of 0.04% ~ 0.06%, tapping temperature above 1 700 ℃.