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Penetration Behavior of CaO–SiO2–FeOx–MgO–(CaCl2) Slags in MgO Refractory

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Abstract

Laboratory experiments were carried out to investigate the effect of CaCl2 addition on the penetration behavior of BOF slags in MgO refractory. Slag viscosity and surface tension as well as the contact angle between the slags and MgO refractory were measured. It is found that the penetration depth increases with experimental time. Adding CaCl2 to BOF slag will enhance the penetration depth of the slags in MgO refractory. The viscosity and surface tension as well as contact angle are reduced by the addition of CaCl2 into the slags. The improved fluidity and wettability are the main reasons for the increase in penetration depth. The degradation mechanism of MgO refractory by CaCl2-added BOF slag was discussed, and both chemical reactions and slag penetration take place during the degradation. The structure of the MgO refractory influences the degradation evidently. For dense refractory, adding CaCl2 may be beneficial to lower the degradation; while it accelerates the degradation of porous refractory.

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Acknowledgments

The National Natural Science Foundation of China (Grant Nos. U20A20272 and 52074073) is acknowledged for the support to this study.

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The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, 110819, P.R. China

    Ziwen Yan, Zhiyin Deng & Miaoyong Zhu

  2. School of Metallurgy, Northeastern University, Shenyang, P.R. China

    Ziwen Yan, Zhiyin Deng & Miaoyong Zhu

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  1. Ziwen Yan
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  2. Zhiyin Deng
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  3. Miaoyong Zhu
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Yan, Z., Deng, Z. & Zhu, M. Penetration Behavior of CaO–SiO2–FeOx–MgO–(CaCl2) Slags in MgO Refractory. Metall Mater Trans B 54, 1582–1592 (2023). https://doi.org/10.1007/s11663-023-02787-4

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