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Degradation Kinetics of MgO-C Refractory at High Temperature

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Abstract

The degradation mechanism of a MgO-C refractory was studied at 1973 K using an induction furnace under an Ar atmosphere. Cylindrical specimens were analyzed by X-ray computed tomography according to time. The degradation proceeded from the outer surfaces towards the core. Analysis of the degradation kinetics indicated the cylindrical shrinking core model could adequately describe the degradation behavior. The chemical reaction step between CO gas and the MgO aggregate was determined to be the rate-determining step.

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This work was supported by the sabbatical year research grant from Korea Polytechnic University, Korea Government (MOTIE) (P0008425, The Competency Development Program for Industry Specialist), and Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant (Grant number 20172010106310). The authors would like to thank POSCO CHEMICAL, KOREA, for their support of this paper.

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  1. Department of Advanced Materials Engineering, Korea Polytechnic University, 237, Sangidaehak-ro, Shiheung-si, Gyeonggi-do, 15073, Republic of Korea

    Juhun Lee, Jaewoo Myung & Yongsug Chung

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  1. Juhun Lee
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  3. Yongsug Chung
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Correspondence to Yongsug Chung.

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Manuscript submitted October 30, 2020; accepted February 5, 2021.

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Lee, J., Myung, J. & Chung, Y. Degradation Kinetics of MgO-C Refractory at High Temperature. Metall Mater Trans B 52, 1179–1185 (2021). https://doi.org/10.1007/s11663-021-02106-9

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