Effect of different removal conditions on the growth and removal of inclusions in the molten steel in a two-strand tundish
Effect of different removal conditions on the growth and removal of inclusions in the molten steel in a two-strand tundish
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DOI：
10.1051/metal/2017057
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发表时间：
2017
影响因子：
--
通讯作者：
H. Ling;Lifeng Zhang;Hai-jun Wang
中科院分区：
文献类型：
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作者：
H. Ling;Lifeng Zhang;Hai-jun Wang
在目前的研究中，建立了数学模型来预测双链中间包中夹杂物的浓度和大小分布。研究了浮动速度、钢水速度和湍流波动速度对钢渣界面夹杂物去除的影响。同时，通过工业试验测定了钢中夹杂物的组成、数量和大小，并测定了总氧的含量。计算结果与实测结果吻合较好。较强的搅拌能量有利于钢液中夹杂物的碰撞和生长。仅考虑浮速时，夹杂物的去除率为23.4%。钢水速度和湍流波动速度对中间包顶部表面夹杂物去除率的贡献分别为23.2%和14.5%。最后，仅考虑悬浮速度的数学模型能较准确地预测中间包夹杂物的生长和去除。
In the current study, mathematical models were developed to predict the concentration, size distribution of inclusions in a two-strand tundish. The effect of the floating velocity, the velocity of the molten steel, and the turbulent fluctuation velocity on the removal of inclusions at the interface between the molten steel and slag was also studied. Meanwhile, the composition, amount, and size of inclusions in the steel were detected and the content of the total oxygen was obtained from the industrial trial. The calculated results were well validated by the measured ones. The strong stirring energy was greatly beneficial to the collision and growth of inclusions in the molten steel. When only considering the floating velocity, the removal fraction of inclusions was 23.4%. Furthermore, the contribution of the velocity of the molten steel and the turbulent fluctuation velocity to the removal fraction of inclusions at the top surface in the tundish was 23.2% and 14.5%, respectively. Finally, the mathematical model only considering the floating velocity can accurately predict the growth and removal of inclusions in the tundish.