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Structural Optimization of Electromagnetic Swirling Flow in Nozzle of Slab Continuous Casting

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

During the slab continuous casting process, the flow field of molten steel in the mold plays a decisive role in the quality of the slab. In this paper, electromagnetic swirling flow in nozzle technology is proposed to control the flow field in mold. This technology can drive molten steel to rotate inside the submerged entry nozzle by electromagnetic force, thereby controlling the flow field. This research shows that it can reduce the impact of molten steel on the bottom of nozzle and partly reduce the negative pressure at the upper part of nozzle outlet which is even eliminated by optimizing the structure and angle of nozzle. The area of heat flux of the mold wall becomes larger, and the crest value of heat flux gets lower than that without swirling in nozzle and any nozzle optimization. The meniscus fluctuates smoothly, and the flow velocity at the top surface is within a reasonable range. The temperature field distribution in the mold is uniform which was beneficial to the growth of equiaxed crystal and decreased element segregation.

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Acknowledgements

Authors are grateful to the financial support from the National Natural Science Foundation of China (Nos. U1560207 and U51504057) and the National Key R&D Program of China: Upgrading and Industrialization of Key Basic Material Technology (No. 2017YFB0304400).

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Authors and Affiliations

  1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China

    Xiao-Wei Zhu, Chun-Lei Wu, Katsukiyo Marukawa & Qiang Wang

  2. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Xiao-Wei Zhu, Chun-Lei Wu & Katsukiyo Marukawa

  3. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, China

    De-Wei Li

Authors
  1. Xiao-Wei Zhu
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  2. De-Wei Li
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  3. Chun-Lei Wu
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  4. Katsukiyo Marukawa
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  5. Qiang Wang
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Corresponding author

Correspondence to Qiang Wang.

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Available online at http://link.springer.com/journal/40195

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Zhu, XW., Li, DW., Wu, CL. et al. Structural Optimization of Electromagnetic Swirling Flow in Nozzle of Slab Continuous Casting. Acta Metall. Sin. (Engl. Lett.) 31, 1317–1326 (2018). https://doi.org/10.1007/s40195-018-0808-3

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  • DOI: https://doi.org/10.1007/s40195-018-0808-3

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