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Novel Alkaline Method for the Preparation of Low-Chromium Magnesia

  • Design, Development, and Manufacturing of Refractory Metals & Materials
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Abstract

The typical method for the preparation of chromium-magnesia is by energy-consuming grinding, but the pollution of Cr6+ ions is a problem. However, the chromium-magnesia refractory is still irreplaceable due to its outstanding performance. In this regard, low-chromium magnesia was prepared by the alkaline chromium precipitation method from cheap light-burned magnesia. The impurities in the light-burned magnesia was removed in order to avoid the formation of Cr6+. The chromium was precipitated directly on the light-burned magnesia surface without the grinding process. The low-chromium magnesia was obtained after the calcination. The reaction temperature, solid content, reaction time and stirring speed were examined and low-chromium magnesia with Cr3+ 0.4%, MgO 98.5% was obtained. The effect of temperature on the surface tomography of low-chromium magnesia was also discussed. The present novel alkaline method should be a promising way for the preparation of low-chromium magnesia.

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Acknowledgements

Funding for this research by National Natural Science Foundation of China (51574286) and China Postdoctoral Science Foundation (2016M592448) are gratefully acknowledged.

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Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, People’s Republic of China

    Chao Wang, Hui Xu, Weiping Liu, Pengcheng Han & Xiyun Yang

  2. Department of Metallurgical Engineering, College of Mines and Earth Sciences, University of Utah, Salt Lake City, UT, 84112, USA

    Xuming Wang

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  1. Chao Wang
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  2. Hui Xu
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  3. Weiping Liu
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  4. Pengcheng Han
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  6. Xuming Wang
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Correspondence to Weiping Liu or Xuming Wang.

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Wang, C., Xu, H., Liu, W. et al. Novel Alkaline Method for the Preparation of Low-Chromium Magnesia. JOM 72, 333–339 (2020). https://doi.org/10.1007/s11837-018-3284-3

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  • DOI: https://doi.org/10.1007/s11837-018-3284-3

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