Journal
JOURNAL OF APPLIED ELECTROCHEMISTRY
Volume 33, Issue 7, Pages 563-569Publisher
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1024959807438
Keywords
alumina reduction cells; aluminium; gas-evolving electrodes; interelectrode resistance
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The large gas bubbles underneath the anode in Hall-Heroult cells not only affect the ohmic interelectrode resistance by decreasing the cross-sectional area available for current transport. They also exhibit a strong effect on the current distribution in the bubble-free layer, substantially increasing the resistance. Available relationships applied in aluminium industry do not take this effect into account. A review on attempts to describe the interelectrode resistance is given, and an improved relationship derived from a finite element model is presented.
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