板坯连铸中间包中夹杂物运动的模拟

Simulation of the Inclusion Movement in the Tundish of Slab Casting

中间包现在已成为去除夹杂物的一种精炼装置。通常在中间包内安装上下挡墙来改变流体流动和夹杂物的运动轨迹,提高夹杂物的去除率。利用软件进行模拟计算研究中间包内上下挡墙之间的距离,以及到入水口的距离对夹杂物去除的影响,从而合理地设计中间包内上下挡墙,使夹杂物去除达到最佳的效果。计算结果表明,上挡墙到入水口的距离和夹杂物的去除率间关系不明显,受到其他因素较大的影响;下挡墙与入水口越远,明显对夹杂物的去除越有利。上下挡墙之间的距离对夹杂物的去除没有明显规律性的影响。

Tundish is now viewed as a refining device to remove inclusions.Usually weirs and dams are used in the tundish to change the flow and inclusion trajectories,thereby enhancing the removal of inclusions.A common software is used to simulate the influence on the removal of inclusions,with the changes of distance between the walls upside and downside and the distance from the nozzle to the weir.The results showed that： As the distance between the weir and inlet increased,the removal ratio of inclusions is reduced,and the other factor also influence this trend.As the distance between the dam and inlet increased,the removal ratio is obviously increased.And the distance between the dam and weir have no influence on the removal ratio.