Numerical Simulation of the Growth and Removal of Inclusions in the Molten Steel of a Two-Strand Tundish
Numerical Simulation of the Growth and Removal of Inclusions in the Molten Steel of a Two-Strand Tundish
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二流中间包钢水中夹杂物生长与去除的数值模拟
DOI：
10.1007/s11837-013-0689-x
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发表时间：
2013-09-01
期刊：
影响因子：
2.6
通讯作者：
Zhang, Lifeng
中科院分区：
文献类型：
--
作者：
Ling, Haitao;Zhang, Lifeng
本文计算了双流连铸机钢液中夹杂物的湍流碰撞长大和去除过程。将熔体流动、传热和夹杂物浓度场耦合起来。堰坝结构能有效地控制入口区的强搅拌能。入口区夹杂物之间的碰撞远比其它区域强烈。9.2 μm包裹体的上升速度远小于流体的流动速度，因此，小包裹体很好地跟随流体流动。出口处4 μm、5 μm和9.2 μm夹杂物的浓度分别为9.9 ppm、9.1 ppm和30.2 ppm。其他夹杂物的浓度在2.0 ppm-6.0 ppm之间。达到稳定状态后的出口处的钢水的总氧为38.5ppm，假设所有夹杂物都是氧化铝。考虑湍流碰撞增长的去除率比不考虑碰撞增长的去除率高23.0%。
In the current article, the growth of inclusions by turbulent collision and their removal in the molten steel of a two-strand tundish was calculated. The fluid flow was coupled with heat transfer and the concentration field of inclusions in the tundish. The weir and dam was effective to control the strong stirring energy within the inlet zone. The collision among inclusions in the inlet zone was far stronger than that in other zones. The rising velocity of 9.2-μm inclusions was far smaller than the flow velocity; thus, small inclusions followed the fluid flow well. The concentration of 4-μm, 5-μm, and 9.2-μm inclusions at the outlet were 9.9 ppm, 9.1 ppm, and 30.2 ppm, respectively. The concentration of other inclusions was within 2.0 ppm–6.0 ppm. The total oxygen of the molten steel at the outlet after reaching the steady state was 38.5 ppm assuming all inclusions were alumina. The removal fraction considering turbulent collision growth was 23.0% more than that without considering collision growth.