Electrochemical behaviors of anode materials and their performance for bauxite desulfurization

doi:10.1016/j.cjche.2018.04.028

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (4): 802-810.DOI: 10.1016/j.cjche.2018.04.028

• Separation Science and Engineering • Previous Articles Next Articles

Electrochemical behaviors of anode materials and their performance for bauxite desulfurization

Yingnan Hu^1,2, Aijing Lü¹, Mingyong Wang³, Dong Wang¹, Junhao Liu¹, Zhi Wang¹, Xuzhong Gong^1,2

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:2019-06-14 Published:2019-04-28
Contact: Xuzhong Gong
Supported by:
Supported by the Natural Science Foundation of China (51474198, 51422405).

Electrochemical behaviors of anode materials and their performance for bauxite desulfurization

Yingnan Hu^1,2, Aijing Lü¹, Mingyong Wang³, Dong Wang¹, Junhao Liu¹, Zhi Wang¹, Xuzhong Gong^1,2

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

通讯作者: Xuzhong Gong
基金资助:
Supported by the Natural Science Foundation of China (51474198, 51422405).

Abstract

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

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

Yingnan Hu, Aijing Lü, Mingyong Wang, Dong Wang, Junhao Liu, Zhi Wang, Xuzhong Gong. Electrochemical behaviors of anode materials and their performance for bauxite desulfurization[J]. Chinese Journal of Chemical Engineering, 2019, 27(4): 802-810.

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Electrochemical behaviors of anode materials and their performance for bauxite desulfurization

Electrochemical behaviors of anode materials and their performance for bauxite desulfurization

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