Removal of Inclusion through Bubble Curtain Created by Swirl Motion in Submerged Entry Nozzle
Removal of Inclusion through Bubble Curtain Created by Swirl Motion in Submerged Entry Nozzle
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DOI：
10.2355/isijinternational.38.1086
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发表时间：
1998-10
影响因子：
1.8
通讯作者：
S. Yokoya;S. Takagi;Hiroki Souma;M. Iguchi;Y. Asako;Sigeta Hara
中科院分区：
文献类型：
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作者：
S. Yokoya;S. Takagi;Hiroki Souma;M. Iguchi;Y. Asako;Sigeta Hara
在炼钢过程中，众所周知，悬浮的非金属夹杂物可以通过钢浴中注入的Ar气泡去除。本研究的目的是通过对浸入式喷嘴中的流体施加旋涡运动而形成的气泡累积区（即气泡幕）去除夹杂物。通过水模型实验和数值计算（欧拉/拉格朗法、欧拉/欧拉法）得到的结果如下：旋流运动有效地起作用，形成所有流体都通过的气泡幕，并且气泡幕的半垂直角随着旋流强度的增大而增大。另一方面，夹杂物几乎平行于浸入式喷嘴的轴线通过，它们的轨迹与液相流模式相似。因此，气泡和夹杂物相遇的机会将显着增加。
In the steel-making processes, it is well known that suspended non-metallic inclusions can be removed by Ar gas bubbles injected in the steel baths. This study aims to remove the inclusions through a bubble accumulated zone (namely, bubble curtain) created by swirling motion imposed on the flow in a submerged entry nozzle. The results obtained through water model experiments and numerical calculations (Eulerian/Lagragian, Eulerian/Eulerian method) show as follows; the swirling motion works effectively to form a bubble curtain through that all the flow pass, and the half vertical angle of the bubble curtain increases with the increasing swirl strength. On the other hand, inclusions pass nearly parallel to the axis of the submerged entry nozzle, the trajectories of them being similar to the liquid-phase flow pattern. Therefore, a chance for a bubble and an inclusion to meet with each other would significantly increase.