通过控制转炉工艺原辅材料质量,改进和优化加料、供氧等吹炼模型,实现了高的转炉吹炼终点[C]、T命中率;摸索出全程跟踪化渣技术,保证了吹炼过程的稳定性;提高挡渣效果,使大罐内渣层厚度由原来的100 mm以上降到50 mm左右。通过工艺优化提高了马钢CSP工序的脱磷效果,转炉的脱磷率提高到93%以上,终点磷的质量分数平均为0.0088%,过程总回磷小于0.005%,成品平均磷的质量分数为0.010%,提高了产品的质量。
With the control of charge quality for converter and the improvement of charging and oxygen supply models, the high hit rate of carbon and temperature at converter blowing end point was achieved. A technique inspecting the slag forming during blowing was developed to assure the stability of refining,efficient slag carryover control and the thickness of slag layer in the ladle was decreased from 100 mm to 50 mm approximately. In this way, the dephosphorization rate is up to 93%, and the phosphorous content at endpoint is 0.0088% in average,and the rephosphorization is less than 0.005%,so the average phosphorous content of final product is 0.010%.
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