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Corrosion resistance evaluation of highly dispersed MgO-MgAl2O4-ZrO2 composite and analysis of its corrosion mechanism: A chromium-free refractory for RH refining kilns

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Abstract

The corrosion resistance behavior of a highly dispersed MgO-MgAl2O4-ZrO2 composite refractory material is examined by testing with high-basicity and low-basicity RH (Ruhrstahl-Hereaeus) slags. The composite material exhibits greater resistance to the RH slags than the traditional MgO-Cr2O3 composite, MgO-ZrO2 composite, and MgO-MgAl2O4-ZrO2 composite. On the basis of the microstructural analysis and mechanisms calculations, the corrosion resistance behavior of the MgO-MgAl2O4-ZrO2 composite is attributable to its highly dispersed structure, which helps protect the high activity of ZrO2. When in contact with the slag, ZrO2 reacts with CaO to form the stable phase CaZrO3, which protects MgAl2O4 against corrosion, thereby enhancing the corrosion resistance of the composite.

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Acknowledgement

This work was financially supported by the National Natural Science Foundation of China (No. 51872023).

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Authors and Affiliations

  1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Yi-nan Shen & Yi Xing

  2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Peng Jiang, Yong Li, Wen-dong Xue & Guo-xiang Yin

  3. Liaoning Donghe Advanced Material Co., Ltd., Haicheng, 14214, China

    Xue-qin Hong

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  1. Yi-nan Shen
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  2. Yi Xing
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  3. Peng Jiang
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  4. Yong Li
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  5. Wen-dong Xue
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  6. Guo-xiang Yin
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  7. Xue-qin Hong
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Correspondence to Yi Xing or Peng Jiang.

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Shen, Yn., Xing, Y., Jiang, P. et al. Corrosion resistance evaluation of highly dispersed MgO-MgAl2O4-ZrO2 composite and analysis of its corrosion mechanism: A chromium-free refractory for RH refining kilns. Int J Miner Metall Mater 26, 1038–1046 (2019). https://doi.org/10.1007/s12613-019-1807-8

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  • DOI: https://doi.org/10.1007/s12613-019-1807-8

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