基于高废钢比的转炉脱磷工艺研究

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Study on Dephosphorization Technology In Converter with High Scrap Ratio

1. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China;
2. Long Product Departmengt of Tangshan Iron and Steel Company, Hebei Iron and Steel Group, Tangshan 063016, Hebei, China

摘要: 在高废钢比冶炼条件下, 为了改善转炉终点钢液磷含量过高的问题, 采用65 t顶底复吹转炉, 结合脱磷热力学理论, 系统分析研究了入炉铁水和终点条件对转炉脱磷的影响。结果表明, 最佳的入炉铁水和终点脱磷条件为:当铁水温度、Si含量、终渣碱度、FeO和MnO分别控制在1 300~1360℃、0.55%~0.65%、≥2.6、16%~22%和2.5%~4.0%时, 可以顺利实现终点钢液磷含量在0.015 0%以下。
- 顶底复吹转炉 /
- 脱磷 /
- 铁水条件 /
- 终点控制
Abstract: In order to solve the problem of too high phosphorus content in end liquid steel of converter with high scrap ratio,the effects of the conditions of hot metal charging and end point on dephosphorization were studied by combing with the theory of dephosphorization thermodynamics.The results show that the optimum conditions for dephosphorization in hot metal charging and end point are as follows:when hot metal temperature and hot metal Si content should be controlled 1 300~1 360 ℃ and 0.55%~0. 65% respectively in hot metal charging;basicity,Fe O and Mn O were reached ≥2.6、16%~22% and 2.5%~4.0% respectively in converter end point,phosphorus content of liquid steel at the end point can be successfully achieved less than 0.015 0%.
- top and bottom combined blown converter /
- dephosphorization /
- the conditions of hot metal /
- end point control