SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2019, Vol. 27 ›› Issue (4): 802-810.DOI: 10.1016/j.cjche.2018.04.028

• Separation Science and Engineering • 上一篇    下一篇

Electrochemical behaviors of anode materials and their performance for bauxite desulfurization

Yingnan Hu1,2, Aijing Lü1, Mingyong Wang3, Dong Wang1, Junhao Liu1, Zhi Wang1, Xuzhong Gong1,2   

  1. 1 National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2018-03-21 修回日期:2018-04-15 出版日期:2019-04-28 发布日期:2019-06-14
  • 通讯作者: Xuzhong Gong
  • 基金资助:
    Supported by the Natural Science Foundation of China (51474198, 51422405).

Electrochemical behaviors of anode materials and their performance for bauxite desulfurization

Yingnan Hu1,2, Aijing Lü1, Mingyong Wang3, Dong Wang1, Junhao Liu1, Zhi Wang1, Xuzhong Gong1,2   

  1. 1 National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China;
    3 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2018-03-21 Revised:2018-04-15 Online:2019-04-28 Published:2019-06-14
  • Contact: Xuzhong Gong
  • Supported by:
    Supported by the Natural Science Foundation of China (51474198, 51422405).

摘要: Pyrite inside bauxite could be oxidized into soluble S-containing ions by electrolysis, and thus achieving bauxite desulfurization by using filtration. However, S-containing ions in electrolyte had some corrosion effects on electrode, especially for anode. In this work, six kinds of traditional materials were selected as anode, and their corrosion behaviors were examined by using electrochemistry characterization. Tafel and CV curves from simulating electrolyte suggested that their corrosion potentials were in the following order:Ni > C > SS > Fe > Cu > Pb-Ag. As expected, the desulfurization ratio and cell voltage from bauxite electrolysis were in the following order respectively:Cu > Ni > Fe > SS > C > Pb-Ag and Ni > Fe > SS > Cu > C > Pb-Ag. Finally, Ni was proposed a kind of excellent electrode material for bauxite desulfurization from electrolysis.

关键词: Corrosion resistance, High sulfur bauxite, Electrolysis desulfurization, Electrode materials

Abstract: Pyrite inside bauxite could be oxidized into soluble S-containing ions by electrolysis, and thus achieving bauxite desulfurization by using filtration. However, S-containing ions in electrolyte had some corrosion effects on electrode, especially for anode. In this work, six kinds of traditional materials were selected as anode, and their corrosion behaviors were examined by using electrochemistry characterization. Tafel and CV curves from simulating electrolyte suggested that their corrosion potentials were in the following order:Ni > C > SS > Fe > Cu > Pb-Ag. As expected, the desulfurization ratio and cell voltage from bauxite electrolysis were in the following order respectively:Cu > Ni > Fe > SS > C > Pb-Ag and Ni > Fe > SS > Cu > C > Pb-Ag. Finally, Ni was proposed a kind of excellent electrode material for bauxite desulfurization from electrolysis.

Key words: Corrosion resistance, High sulfur bauxite, Electrolysis desulfurization, Electrode materials