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Optimization of Mold Flux for the Continuous Casting of Cr-Contained Steels

  • Topical Collection: Metallurgical Processes Workshop for Young Scholars
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Abstract

To compensate the negative effect caused by the absorption of chromium oxide inclusions during the casting process of Cr-contained steels, a new mold flux system has been designed and investigated. The melting temperature range of the newly designed mold flux system is from [1124 K to 1395 K (851 °C to 1122 °C)]. The viscosity at 1573 K (1300 °C) and the break temperature increase with the addition of MnO and Cr2O3 but decrease with the addition of B2O3. The crystalline fraction of mold flux decreases from 81 to 42.1 pct with the addition of MnO and Cr2O3, and then further decreases to 25.3 pct with the addition of B2O3; however, it improves from 54.4 to 81.5 pct when the basicity increases. Besides, the heat-transfer ability of mold flux is inverse to the crystallization ratio of the slag. The comprehensive study of the properties for the four designed mold fluxes suggests that the mold flux with 1.15 basicity-3.01 pct B2O3-1.10 pct MnO-2.10 pct Cr2O3 shows the best properties for the continuous casting of Cr-contained steels.

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Acknowledgments

The financial support from the National Science Foundation of China (Grant Nos. 51504294 and U1760202) is great acknowledged.

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Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, P.R. China

    Wanlin Wang, Jie Yu, Lejun Zhou & Huan Li

  2. Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ma’anshan, 243002, P.R. China

    Zhaoyang Wu

Authors
  1. Wanlin Wang
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  2. Jie Yu
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  3. Lejun Zhou
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  4. Zhaoyang Wu
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  5. Huan Li
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Correspondence to Lejun Zhou.

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Manuscript submitted July 28, 2017.

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Wang, W., Yu, J., Zhou, L. et al. Optimization of Mold Flux for the Continuous Casting of Cr-Contained Steels. Metall Mater Trans B 49, 1580–1587 (2018). https://doi.org/10.1007/s11663-018-1279-7

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  • DOI: https://doi.org/10.1007/s11663-018-1279-7

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