Spent Potlining from Aluminium Electrolysis-Are Cells with Vertical Inert Electrodes a Solution?
Jón Hjaltalín Magnússon （ Arctus Aluminium Ltd., Reykjavik, Iceland ）
Halvor Kvande （ Norwegian University of Science and Technology (NTNU) in Trondheim, Norway (retired) ）
https://doi.org/10.37155/2717-526X-71-55982简介
Spent potlining (SPL) is a term used in the aluminium industry for the spent cathode lining materials of industrial electrolysis cells. SPL is the cathode and sidewall materials that are removed from a cell after being shut down. The treatment of spent potlining is an environmental problem that has been a challenge for a long time and it needs to be solved. Sodium ions are the main carrier of electrical current through the molten cryolite bath during electrolysis, and a small amount of sodium metal is formed as part of the cathode reaction. Sodium penetrates the porous horizontal carbon cathode blocks in the bottom of the cell and causes swelling of the carbon material. With the present cell design it is not possible to eliminate this sodium interaction, and the only way to avoid it is to use a different cell design. The present paper discusses whether the use of cells with vertical inert electrodes will give less sodium penetration in the carbon part of the cell.
关键字
Aluminium; Carbon anodes; Carbon cathodes; Inert anodes; Inert titanium diboride cathodes; Sodium; Cathode lining material全文
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版权所有 © 2025 Jón Hjaltalín Magnússon, Halvor Kvande
出版时间:2025-03-17
本作品采用以下许可协议授权： 知识共享 署名 4.0 国际许可协议
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