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Erschienen in:
2016 | OriginalPaper | Buchkapitel
Influence of the Cathode Surface Geometry on the Metal Pad Current Density
verfasst von : Marc Dupuis, Valdis Bojarevics
Erschienen in: Light Metals 2014
Verlag: Springer International Publishing
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In the recent years, the Chinese aluminum industry has started to extensively use irregular top surface cathode blocks in its new cell designs. The increase popularity of these new types of cell designs in China is explained by the fact that they can be operated at a much lower cell voltage.The cell voltage can be reduced because irregular top cathode surface designs seem to increase the MHD cell stability which allows the cell to be operated at a reduced ACD. No satisfactory explanation as to why the usage of irregular top cathode surface promotes MHD cell stability has been presented up to now.The present work concentrates on the influence of the cathode surface geometry on the metal pad current density as potential cause of the change in the MHD cell stability behavior.