Bubble behavior under a novel metallurgy process coupling an annular gas curtain with swirling flow at tundish upper nozzle
Bubble behavior under a novel metallurgy process coupling an annular gas curtain with swirling flow at tundish upper nozzle
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中间包上水口环形气幕与旋流耦合的新型冶金工艺下的气泡行为
DOI：
10.1016/j.jmrt.2022.10.100
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发表时间：
2022-10
期刊：
影响因子：
--
通讯作者：
Jin Yan
中科院分区：
文献类型：
--
作者：
Qin Xufeng;Cheng Changgui;Li Yang;Wu weili;Jin Yan
本文开发了一种将环形气幕与中间包上水口（TUN）旋流技术相结合的新型冶金工艺。通过1:2比例的水模型研究了气泡的迁移和分布行为，并进一步研究了工艺和结构参数对模具内气体流量和气泡尺寸分布的影响。结果表明，大部分氩气气泡在中间包内上浮，在塞杆周围形成完整的环形气幕，少部分小气泡进入水口和结晶器，可实现TUN处正常吹氩的效果。钢液通过旋流槽时，在喷嘴内会产生一定的旋流。在旋流离心力的作用下，轻质气泡会向喷嘴中心汇聚，增加了气泡碰撞、聚结的概率。随着吹氩流量、拉速、旋流槽数量和高度的增加，结晶器内的氩气量和平均气泡尺寸逐渐增加。
A novel metallurgy process coupling an annular gas curtain and swirling flow technology at a tundish upper nozzle (TUN) was developed in this paper. The migration and distribution behaviors of bubbles were studied by a 1:2 scale water model, and the effects of the process and structural parameters on the distribution of gas flow and bubble size in the mold were further investigated. The results indicated that most argon bubbles float up in the tundish, forming a complete annular gas curtain around the stopper rod, and a small portion of small bubbles enter the nozzle and mold, which can realize the effect of normal argon blowing at the TUN. The liquid steel passing through the swirl slots can produce a certain swirling flow in the nozzle. Under the action of the centrifugal force of the swirling flow, lightweight bubbles will converge to the centre of the nozzle, which increases the collision and coalescence probability of bubbles. As the flow rate of argon blowing, casting speed, and number and height of swirl slots increase, the argon volume and average bubble size in the mold gradually increase.
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DOI：
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DOI：
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影响因子：
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