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Slag Pool Depth Effectiveness of Molten Mold Flux Feeding Technology

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Abstract

POSCO’s advanced CASting Technology (PoCAST) is an innovative molten mold flux feeding technology which has been developed to ensure quality of continuously-cast Twinning-Induced Plasticity (TWIP) steel and Ultra-low carbon steels (ULCSs). Stable qualities of ULCS slabs could be achieved by reducing mold flux entrapments by optimizing the range of slag pool depth; this result matches well with entrapment characteristics during 0.6 scale water model tests. Also, uniform solidification at the meniscus with shallower depth of oscillation mark and subsurface hook depth was performed in optimum range of slag pool depth. Thermal plasma melting furnace feeding facility has been developed to control the slag pool depth in the mold by increasing the melting rate. The proposed optimized range of slag pool depth was verified in a commercial trial by realizing thickness control of slag pool depth during ULCS production.

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Acknowledgment

The research was supported by the people of POSCO.

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Authors and Affiliations

  1. Technical Research Laboratories, POSCO, Pohang, 37859, Republic of Korea

    Shin Yoo, Sang-Hyun Park, Min-Seok Park, Joong-Kil Park & Ki-Hyeon Moon

  2. Graduate School of Engineering Mastership, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea

    Shin Yoo

  3. Graduate Institute of Ferrous Technology, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea

    Jung-Wook Cho

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  1. Shin Yoo
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Correspondence to Jung-Wook Cho.

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Manuscript submitted December 17, 2018.

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Yoo, S., Cho, JW., Park, SH. et al. Slag Pool Depth Effectiveness of Molten Mold Flux Feeding Technology. Metall Mater Trans B 51, 1965–1972 (2020). https://doi.org/10.1007/s11663-020-01881-1

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