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Comparison of deep desulfurization methods in alumina production process

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Abstract

Several methods of deep desulfurization in alumina production process were studied, and the costs of these methods were compared. It is found that most of the S2−removed by adding sodium nitrate or hydrogen peroxide in digestion process, and in this way the effect of S2− on alumina product quality is eliminated. However, the removal efficiency of S2O 2−3 in sodium aluminate solution is very low by this method. Both S2− and S2O 2−3 in sodium aluminate solution can be removed completely by wet oxidation method in digestion process. The cost of desulfurization by wet oxidation is lower than by adding sodium nitrate or hydrogen peroxide. The results of this research reveal that wet oxidation is an economical and feasible method for the removal of sulfur in alumina production process to improve alumina quality, and provide valuable guidelines for alumina production by high-sulfur bauxite.

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Authors and Affiliations

  1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming, 650093, China

    Zhan-wei Liu  (刘战伟) & Wen-hui Ma  (马文会)

  2. State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan Province/The National Engineering Laboratory for Vacuum Metallurgy, Kunming University of Science and Technology, Kunming, 650093, China

    Zhan-wei Liu  (刘战伟) & Wen-hui Ma  (马文会)

  3. Zhengzhou Research Institute of CHALCO, Zhengzhou, 450041, China

    Wang-xing Li  (李旺兴), Zhong-lin Yin  (尹中林) & Guo-bao Wu  (武国宝)

Authors
  1. Zhan-wei Liu  (刘战伟)
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  2. Wang-xing Li  (李旺兴)
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  3. Wen-hui Ma  (马文会)
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  4. Zhong-lin Yin  (尹中林)
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  5. Guo-bao Wu  (武国宝)
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Corresponding author

Correspondence to Zhan-wei Liu  (刘战伟).

Additional information

Foundation item: Project(51404121) supported by the National Natural Science Foundation of China; Project(KKSY201452041) supported by Yunnan Provincal Personnel Training Funds for Kunming University of Science and Technology, China

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Liu, Zw., Li, Wx., Ma, Wh. et al. Comparison of deep desulfurization methods in alumina production process. J. Cent. South Univ. 22, 3745–3750 (2015). https://doi.org/10.1007/s11771-015-2918-7

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  • DOI: https://doi.org/10.1007/s11771-015-2918-7

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