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Slag corrosion characteristics of MgO-based refractories under vacuum electromagnetic field

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Abstract

MgO-based refractories have been widely used in metallurgical processes. However, their service lives are limited by the corrosion and penetration effects of the molten slag. To figure out the slag resistance of various MgO-based refractories, MgO–MgAl2O4, MgO–CaO, and MgO–C refractories were chosen in this work, and their slag corrosion characteristics under vacuum electromagnetic fields were investigated using the static crucible method at 1873 K. Furthermore, the corroded interfaces of refractories were analyzed by x-ray diffractometer (XRD), scanning electron microscope (SEM), and energy dispersive spectrometer (EDS). It was found that in CaO–Al2O3–SiO2–MgO slag system, the refractories displayed different slag corrosion resistance, and their corrosion depths ranged from 3 to 10 mm. The corrosion depths of MgO–CaO refractories were more than 10 mm, which showed the worst slag resistance performance. Among them, MgO–C refractories were hardly corroded by the molten slag and its corrosion depth was less than 3 mm.

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Funding

The authors gratefully acknowledge the financial supports from the open research fund for the State Key Lab for Advanced Refractories (Grant No.2016-01), National Natural Science Foundation of China (Grant No. 51772277), and the postdoctoral fund of the Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.

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Authors and Affiliations

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

    Xinming Ren, Beiyue Ma, Shiming Li & Jingkun Yu

  2. State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd, Luoyang, 471039, China

    Beiyue Ma, Hongxia Li, Guoqi Liu, Shixian Zhao, Wengang Yang & Fan Qian

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  1. Xinming Ren
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  2. Beiyue Ma
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  3. Shiming Li
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Correspondence to Beiyue Ma or Hongxia Li.

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Ren, X., Ma, B., Li, S. et al. Slag corrosion characteristics of MgO-based refractories under vacuum electromagnetic field. J Aust Ceram Soc 55, 913–920 (2019). https://doi.org/10.1007/s41779-019-00323-9

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  • DOI: https://doi.org/10.1007/s41779-019-00323-9

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