六流中间包采用控制装置的物理模拟研究

Study on Physical Simulation of Six-strand Tundish with Control Device

以包钢六流大方坯连铸中间包为研究对象,根据相似原理建立几何相似比为1∶4的物理模型,研究挡墙挡坝结构对中间包内钢液流动状态的影响。结果表明,采用挡墙挡坝结构与未采用挡墙挡坝结构相比,钢液平均停留时间增加5.51%,死区比例减少20.73%。通过在中间包内设置挡墙和挡坝装置,能有效控制中间包内钢液的流动状况,增加中间包各流的峰值时间和平均停留时间,降低中间包整体的死区体积,从而有利于钢液在中间包内充分混匀和夹杂物聚集上浮。

The effects of structure of retaining wall and dam on the flow condition of liquid steel in tundish are studied based on the physical model with geometric similarity ratio of 1∶4 established according to the similarity principle by taking the six-strand continuous casting tundish of bloom of Baotou Steel as the object of study.The results showed that the average retention time of liquid steel was increased by 5.51%and proportion of dead band was reduced by 20.73%by comparing the structures with and without retaining wall and dam.The flow condition of liquid steel in tundish could be effectively controlled,peak time and average retention time of each strand for tundish are increased as well as volume of dead band for the whole tundish is reduced so as to be beneficial to fully mixing liquid steel in tundish as well as aggregation and floating of inclusions.