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为探究复吹转炉底吹供气方式对转炉搅拌效果的影响,采用水模拟方法研究了转炉底吹流量分配比、切换频率及分组模式对渣-金界面传质与混匀的影响。实验结果表明:流量分配比、切换频率及分组模式都会使渣-金界面的传质系数与混匀时间发生改变。在连续模式下,底吹流量分配比选择4时,传质效果最优;流量分配比选择5时,混匀时间最小。在间隔模式下,底吹流量分配比选择3时,传质效果最优;流量分配比选择4时,混匀时间最小。传质系数随切换频率的增加而减小。流量分配比对连续模式传质系数的影响比间隔模式大,2种模式下混匀效果接近。连续模式下底吹会导致炉衬侵蚀不均,大流量侧会加速炉衬侵蚀和两相乳化过程,小流量侧则相反。
In order to explore the influence of BOF BOF blowing mode on converter stirring effect, the effects of BOF flow distribution ratio, switching frequency and grouping mode on mass transfer and mixing of slag-gold interface were studied by water simulation. The experimental results show that the mass transfer coefficient and mixing time of the slag-gold interface can be changed by the flow distribution ratio, switching frequency and grouping mode. In continuous mode, when the bottom blowing flow rate is 4, the mass transfer effect is the best. When the flow distribution ratio is 5, the mixing time is the least. In the interval mode, when the bottom blow flow rate is 3, the mass transfer effect is the best. When the flow distribution ratio is 4, the mixing time is the minimum. The mass transfer coefficient decreases as the switching frequency increases. The effect of flow distribution ratio on the mass transfer coefficient of continuous mode is larger than that on the interval mode, and the mixing effect is close under the two modes. Bottom blowing at continuous mode results in erratic erosion of the lining, large flow rate accelerates lining erosion and two-phase emulsification, and vice versa on the low flow side.