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通过建立多相流数学模型对带有过滤器中间包钢水内夹杂物的运动轨迹及浇注过程中夹杂物去除率进行模拟研究.在某钢厂提取连铸过程中中间包入口及出口处钢样,对其进行大样电解得到夹杂物在钢水中所占的比例,验证了数学模型正确性,并分析浇注过程对夹杂物去除的影响.结果表明:穿过过滤器的夹杂物速率变小,停留时间增加,去除几率增加,过滤器可以提高夹杂物的去除率;对于粒径在100μm以上的夹杂物,其去除率在稳定后不再发生剧烈波动,但对于粒径小于80μm的夹杂物,其去除率在稳定后依然存在较大波动,浇注中后期20μm以下的夹杂物在出口处甚至出现了增加.夹杂物去除是一个非稳态过程.
Through the establishment of mathematical model of multi-phase flow in the tundish with filter tundish movement of inclusions and inclusions in the casting process to study the removal rate.In a steel extraction and casting process tundish entrance and exit steel , The sample was electrolyzed to get the proportion of inclusions in the molten steel, the correctness of the mathematical model was verified and the influence of pouring process on the removal of inclusions was analyzed.The results show that the rate of inclusions passing through the filter becomes smaller , The residence time increases and the removal probability increases. The filter can improve the removal rate of inclusions. For the inclusions with particle size above 100μm, the removal rate does not fluctuate violently after the stabilization, but for inclusions less than 80μm , And the removal rate still fluctuates greatly after the stabilization, and inclusions below 20μm in the middle and late stages of pouring increase even at the outlet. Inclusion removal is an unsteady process.