底吹中间包内钢液及夹杂物运动特性的数模研究

Mathematical Simulation of Steel Flow and Inclusion Movement in the Tundish with Gas Blowing at the Bottom

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和拉格郎日随机轨道模型,模拟计算采用湍流控制器和气幕挡墙技术的中间包内的钢液流动特性及钢水中夹杂物的运动行为。研究结果表明,中间包底部吹气过程可以有效地改善钢液的流动状态,消除短路流,起到中间包挡墙的作用,并且增大夹杂物在中间包内上浮排出率,大大提高了钢水的清洁度。

According to the structure and the operating parameters of tundish at a certain plant, Eulerian multiphase model and porous media model are applied ; and the characteristics of flow and movement of inclusion in the tundish with turbulence inhibitor and gas blowing at the bouom arc mathematically simulated. It is found that gas blowing at the bottom, like a dam, has effectively changed the steel flow, eliminated the short flow, and increased the inclusion removal rate, by which steel cleanliness can be improved.