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以迁钢RH精炼炉为背景,建立了RH强制脱碳数学模型,确定了脱碳的4个反应地点:真空室内钢液自由表面,氩气表面,真空室钢液内部与飞溅液滴表面,并进行了RH强制脱碳机制研究。模型计算结果表明,在真空处理前期,钢液内部脱碳速率在4个脱碳地点中占据主导地位,而在后期以液滴脱碳为主;在迁钢现有的压降模式下,确定了第3分钟进行吹氧操作,保证40m3/min的吹氧流量为最佳的工艺处理方式,并通过迁钢实际生产炉次的对照验证了模型计算结果。
Based on the RH refining furnace in Qigang, a mathematic model of RH decarbonization was established and four reaction sites of decarburization were determined: the free surface of molten steel in vacuum chamber, the surface of argon, the interior of molten steel in the vacuum chamber and the surface of splash droplets, The RH decarburization mechanism was also studied. The model calculation results show that in the early stage of vacuum treatment, the internal decarburization rate of molten steel occupies the dominant position among the four decarburization sites, while the decarburization is dominated in the later stage. In the existing pressure drop mode of Qianfang Steel, The first 3 minutes oxygen operation, to ensure that the flow rate of 40m3 / min oxygen blowing for the best process, and by comparing the actual production of heat transfer furnace verified the model results.