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介绍了邢台钢铁有限责任公司炼钢厂方坯连铸超低碳钢的操作实践,对不同的生产工艺进行对比后,优化选择了“转炉→LF精炼→RH真空处理→方坯连铸”工艺路线。研究发现:无顶渣改质时(FeO)、(MnO)含量高,且波动较大(w(FeO)=9%~14%、w(MnO)=1%~3%),易造成水口絮流;采用三步顶渣改质工艺(转炉、LF、RH工序钢包顶渣改质),可将顶渣w(FeO+MnO)控制在3%左右,为钢液钙处理创造有利条件,避免水口絮流,实现多炉连浇,且成品平均w(C)=0.008%(“转炉→RH→LF→方坯连铸”工艺成品平均w(C)=0.010 2%)。
The operation practice of billet continuous casting ultra - low carbon steel in Xingtai Steel Co., Ltd. Was introduced. After comparing the different production processes, the optimized “converter → LF refining → RH vacuum processing → billet continuous casting ”Routing. The results show that the content of FeO and MnO is high and the fluctuation is very high (w (FeO) = 9% ~ 14% and w (MnO) = 1% ~ 3% The top slag w (FeO + MnO) can be controlled at about 3% by using the three-step top slag modification process (converter, LF, RH process ladle top slag modification) to create favorable conditions for the calcium treatment of molten steel, Avoid cross-flow of water to achieve multi-furnace continuous pouring, and the finished product average w (C) = 0.008% ( “converter → RH → LF → billet continuous casting process” average w (C) = 0.010 2%).