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根据某厂实际中间包的操作工艺参数,采用欧拉两流体模型以及多孔介质模型,用数值模拟法研究了同时采用湍流控制器和气幕挡墙技术,中间包内气幕挡墙的位置及吹气量对中间包内钢液流动特性的影响。结果表明,采用气幕挡墙技术,吹气量及吹气位置对钢液流场及RTD曲线影响较大,吹气位置靠近入口或出口都不利于中间包钢液流动特性的改善,吹气量太大易引起表面卷渣现象,吹气量太小,不能形成有效的气幕挡墙。气幕挡墙距离入口1 200~2 000 mm,且吹气量为0.90 m3/h时,可以有效延长钢液的停留时间,减小死区体积,有利于夹杂物的上浮去除。
According to the operating process parameters of an actual tundish in a factory, Euler two-fluid model and porous media model were used to study the effect of turbulence controller and air curtain retaining wall technology on the position of the air curtain wall in the tundish Influence of Gas Quantity on Flow Characteristics of Molten Steel in Tundish. The results show that the use of air curtain wall technology, the amount of air blown and blowing position on the flow field and RTD curves have a greater impact near the entrance or exit are not conducive to the flow characteristics of the tundish to improve the inflatable volume too Large easy to cause the phenomenon of surface entrainment, blowing too small, can not form an effective curtain wall. Air curtain wall distance from the entrance of 1 200 ~ 2 000 mm, and the inflow of 0.90 m3 / h, can effectively extend the retention time of molten steel to reduce the dead volume, is conducive to the removal of inclusions floating.