通过选择乳状液滴模拟夹杂物和连铸中间包水模型实验, 考察了控流装置、浇铸速度 及夹杂物粒径对中间包内夹杂物去除行为的影响规律. 结果表明: 挡墙-挡坝组合控 流去除夹杂物效果最佳, 中间包内强湍流区夹杂物的碰撞、聚合以及向上和表面流速的 增加是主因; 中间包注流区加入冲击槽, 虽然其流体流动特征发生改变, 但对夹杂物 去除率的影响并不显著; 浇铸速度较高时, 仅靠控流装置的优化已不能很好地改 善夹杂物的去除效果.
ABSTRACT The effects of flow control device、casting flowrate of liquid steel and inclusion size on inclusion removal in continuous casting tundish were investigated by choosing emulsion drops simulated as inclusions in a water model. The results show that the efficiency of inclusion removal in tundish with weir and dams is relatively high due to the collision and aggregation of inclusions in high turbulence region and the improvement of flow field in tundish. Although the fluid flow has some change in pouring region with turbulence inhibitor in tundish, It has not much effect on the efficiency of inclusion removal. It seems to be difficult to improve the efficiency of inclusion removal only by optimizing the flow control devices in tundish with high casting flowrate of liquid steel.
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