Numerical simulation of structure optimization of one-strand slab tundish dam

XING Li-yong; GAO Yu; ZHANG Cai-dong; YAO Hong-yong; LI Jie; TIAN Zhi-qiang

doi:10.13228/j.boyuan.issn1005-4006.20220055

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Continuous Casting ›› 2022, Vol. 41 ›› Issue (5) : 95-100. DOI: 10.13228/j.boyuan.issn1005-4006.20220055

Continuous Casting Technology

Numerical simulation of structure optimization of one-strand slab tundish dam

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Abstract

Based on the one-strand slab tundish of a steel corporation, the numerical simulation method was used to study the molten steel flow field and the removal of inclusions before and after the optimization of the tundish dam structure. The result shows that the optimized dam allows part of molten steel to flow out through the diversion hole, which reduces the impact of molten steel flowing upward along the dam on the liquid surface, and also avoids short-circuit flow formed by the direct outflow along the bottom. The average residence time of 30° diversion hole in the tundish is the longest, the dead zone is the smallest, and flow state is the most reasonable. When the angle of diversion hole is further increased, the molten steel flows out of the diversion hole and quickly merges into the large circulation behind the dam, and the residence time decreases. The inclusion removal rate of the 30° diversion hole is about 11% higher than that of the original structure. When the angle is further increased, the removal rate of inclusions decreases, but it is slightly better than the original dam structure. After the industrial application of the new dam structure, the results of inclusion ratings have improved significantly.

Key words

tundish / structure optimization / resident time distribution / inclusion / numerical simulation

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XING Li-yong, GAO Yu, ZHANG Cai-dong, et al. Numerical simulation of structure optimization of one-strand slab tundish dam[J]. Continuous Casting, 2022, 41(5): 95-100 https://doi.org/10.13228/j.boyuan.issn1005-4006.20220055

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