非对称二流中间包夹杂物碰撞长大行为研究

Study on Collision and Growth of Inclusions in a Two-Strand Unsymmetrical Tundish

采用数值模拟方法考察了非对称二流中间包内夹杂物碰撞长大行为,计算结果表明:挡墙对中间包流场影响较大,有利于控制中间包内钢液湍流流动;安装挡墙后中间包内湍动能耗散率分布更均匀,最大湍动能耗散率为无挡墙时最大值的1/5;挡墙对中间包夹杂物空间分布影响较大;挡墙的安装有利于提高夹杂物去除率,可有效地增强对直径>50的大尺寸夹杂物的去除。

A mathematical model was developed to investigate the collision and growth behavior of inclusions in a two-strand unsymmetrical tundish. The numerical results indicate that the baffles has a great effect on the fluid flow and is helpful to control the turbulent flow in tundish. The turbulent kinetic energy dissipation rate is more uniform in the tundish with baffle and the maximum value is about one fifth of that in the tundish without baffle. The baffle in tundish can change the distribution of inclusions and increase the inclusion removal rate. Furthermore, the removal rate for inclusions larger than 50 can be increased greatly in tundish with baffle.