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pH variation mechanism of high sulfur-containing bauxite

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Abstract

In order to fundamentally solve the acidification problem of high sulfur-containing bauxite during storage, by simulating the environment of minerals storage in laboratory, the acidification mechanism and influencing factors of high sulfur-containing bauxite were studied and confirmed using the single variable method to control the atmosphere, water and other variables. The results show that the acidification is mostly caused by the oxidation of sulfur-containing bauxite, which is mainly the natural oxidation of Pyrite (FeS2), then the alkaline minerals dissolute in the presence of water, leading to the acidification phenomenon, which is influenced by moisture and air flow. Finally, more acid-producing substances are formed, resulting in the acidification of high sulfur-containing bauxite. The acidification of high sulfur-containing bauxite results from the combined effect of the oxygen in the air and water, which can be significantly alleviated by controlling the diffusion of the oxygen in air.

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Authors and Affiliations

  1. School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China

    **ng-hua Chen  (陈兴华), Yue-hua Hu  (胡岳华) & Xue-feng Cao  (曹学锋)

  2. Aluminum Corporation of China Limited, Bei**g, 100082, China

    **ng-hua Chen  (陈兴华), Wang-xing Li  (**旺兴) & **ang-qing Chen  (陈湘清)

Authors
  1. **ng-hua Chen  (陈兴华)
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  2. Yue-hua Hu  (胡岳华)
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  3. Wang-xing Li  (**旺兴)
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  4. **ang-qing Chen  (陈湘清)
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  5. Xue-feng Cao  (曹学锋)
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Corresponding author

Correspondence to Yue-hua Hu  (胡岳华).

Additional information

Foundation item: Project(2013AA064102) supported by the National High Technology Research and Development Program of China

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Chen, Xh., Hu, Yh., Li, Wx. et al. pH variation mechanism of high sulfur-containing bauxite. J. Cent. South Univ. 22, 2909–2913 (2015). https://doi.org/10.1007/s11771-015-2825-y

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  • DOI: https://doi.org/10.1007/s11771-015-2825-y

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