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Methodological Review of Methods and Technology for Utilization of Spent Carbon Cathode in Aluminum Electrolysis

Author

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  • Liuzhou Zhou

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China)

  • Zhen Yao

    (School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China)

  • Ke Sun

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China)

  • Zhongliang Tian

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China)

  • Jie Li

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China
    National Engineering Research Center for Low-Carbon Non-Ferrous Metallurgy, Central South University, Changsha 410083, China)

  • Qifan Zhong

    (School of Metallurgy and Environment, Central South University, Changsha 410083, China
    National Engineering Research Center for Low-Carbon Non-Ferrous Metallurgy, Central South University, Changsha 410083, China)

Abstract

Spent carbon cathode (SCC) is one of the major hazardous solid wastes generated during the overhaul of electrolysis cells in the aluminum production process. SCC is not only rich in carbon resources but also contains soluble fluoride and cyanide, which gives it both recycling value and significant leaching toxicity. In this study, we explore the properties, emissions, and disposal strategies for SCC. Pyrometallurgy involves processes such as vacuum distillation, molten salt roasting, and high-temperature roasting. Hydrometallurgy describes various methods used to separate valuable components from leachate and prepare products. Collaborative disposal plays a positive role in treating SCC alongside other solid wastes. High-value utilization provides an approach to make full use of high-purity carbon-based materials. Finally, we analyze and summarize future prospects for the disposal of SCC. This study aims to contribute to the large-scale treatment and resource utilization of SCC while promoting circular economy principles and green development initiatives.

Suggested Citation

  • Liuzhou Zhou & Zhen Yao & Ke Sun & Zhongliang Tian & Jie Li & Qifan Zhong, 2024. "Methodological Review of Methods and Technology for Utilization of Spent Carbon Cathode in Aluminum Electrolysis," Energies, MDPI, vol. 17(19), pages 1-26, September.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:19:p:4866-:d:1487778
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    References listed on IDEAS

    as
    1. Tianhao Shen & Fengxia Zhang & Shiliang Yang & Hua Wang & Jianhang Hu, 2023. "Investigation of Pyrolysis Kinetic Triplet, Thermodynamics, Product Characteristics and Reaction Mechanism of Waste Cooking Oil Biodiesel under the Influence of Copper Slag," Energies, MDPI, vol. 16(5), pages 1-22, February.
    2. Zhao, Pengcheng & Wang, Jingang & Xia, Haiting & He, Wei, 2024. "A novel industrial magnetically enhanced hydrogen production electrolyzer and effect of magnetic field configuration," Applied Energy, Elsevier, vol. 367(C).
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