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

Yi-nan Shen; Yi Xing; Peng Jiang; Yong Li; Wen-dong Xue; Guo-xiang Yin; Xue-qin Hong

doi:10.1007/s12613-019-1807-8

Volume 26 Issue 8

Aug. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(8): 1038-1046

Yi-nan Shen, Yi Xing, Peng Jiang, Yong Li, Wen-dong Xue, Guo-xiang Yin, and Xue-qin Hong, 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(2019), No. 8, pp. 1038-1046. https://doi.org/10.1007/s12613-019-1807-8

Cite this article as:

Yi-nan Shen, Yi Xing, Peng Jiang, Yong Li, Wen-dong Xue, Guo-xiang Yin, and Xue-qin Hong, 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(2019), No. 8, pp. 1038-1046. https://doi.org/10.1007/s12613-019-1807-8

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Research Article

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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Corresponding authors:
Yi Xing E-mail: xingyi@ustb.edu.cn

Peng Jiang E-mail: jiangp@ustb.edu.cn
Received: 19 October 2018; Revised: 7 January 2019; Accepted: 11 January 2019

Abstract

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.
- highly dispersed MgO-MgAl₂O₄-ZrO₂ composite material;
- RH refining;
- chrome-free refractory;
- slag corrosion resistance

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References

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