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Numerical Study on Metallurgical Effect of Filtering Weir with Multi-stepped Orifices in Tundish

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Abstract

Herein, a novel filtering weir with multi-stepped orifices is proposed to solve the problem of ineffective removal of small inclusions with traditional flow control devices in tundishes. Without changing the installation position, three types of novel filtering weir were designed. The flow and heat transfer behavior, wall shear distribution of the weir and dam, and removal rate of inclusions with different sizes were compared and analyzed. A 1:0.4 scale water model was conducted to validate the flow field calculated by mathematical simulation. The results indicate that the filtering weir can extend the response time and promote the mixing of liquid steel, but has little impact on the residence time and dead volume fraction. Due to the influence of the flow, the near-wall velocity and wall shear stress of the weir and dam decrease, but the area of the low-temperature zone of liquid surface in tundishes increases. The multi-stepped orifices added on the weir increase the removal rate of inclusions below 50 μm, especially the removal rate of inclusion of 2 and 5 μm increases to 63 to 64 pct, which is 18 to 21 pct higher than that with a traditional weir.

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Acknowledgments

This work was supported by National Natural Science Foundation of China (Grant Numbers 52204351, 51874215), China Postdoctoral Science Foundation (2022M722487), and Open Fund Project (Grant No. FMRUlab23-05) supported by Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education.

Conflict of interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Authors and Affiliations

  1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, P.R. China

    Xufeng Qin, Changgui Cheng, Hao Chen, Yang Li & Yan **

  2. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, P.R. China

    Xufeng Qin, Changgui Cheng, Hao Chen, Yang Li & Yan **

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  1. Xufeng Qin
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Correspondence to Changgui Cheng.

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Qin, X., Cheng, C., Chen, H. et al. Numerical Study on Metallurgical Effect of Filtering Weir with Multi-stepped Orifices in Tundish. Metall Mater Trans B 55, 1910–1924 (2024). https://doi.org/10.1007/s11663-024-03075-5

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