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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Primary Aluminum Industry - Energy and Emission Reductions: An LMD Symposium in Honor of Halvor Kvande
Presentation Title Reflections on the Low Voltage Anode Effect in Aluminium Electrolysis Cells
Author(s) Asbjorn Solheim
On-Site Speaker (Planned) Asbjorn Solheim
Abstract Scope The paper addresses the basic mechanisms leading to the low voltage anode effect (LVAE) as well as the high voltage anode effect (HVAE) in aluminium electrolysis cells. The root cause of any anode effect is too low alumina concentration at the anode surface. By statistical treatment based on a Gaussian distribution of the alumina concentration, it was found that the onset of a HVAE takes place at higher average concentration if there is a large standard deviation. By calculating the anode potential, it was found that an LVAE can take place at a part of the anode as small as 0.001 m2 while the rest of the anode works normally, which makes the LVAE extremely difficult to discover. It was suggested that the on-and-off current pattern observed during LVAE can be explained by alternation between blocking of the surface (AE) and normal electrolysis, induced by non-stationary mass transfer of alumina.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum, Modeling and Simulation, Electrometallurgy

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Historical Review of Aluminum Reduction Cell Start-up and Early Operation
Direct and indirect CO2 equivalent emissions from primary aluminium production
Environmental Enhancement of Potroom Processes by Using a Machine Vision System
Gas Recycling and Energy Recovery. Future Handling of Flue Gas from Aluminium Electrolysis Cells
Halvor Kvande: An Academic Ambassador in Aluminum Between China and Norway
Ready-to-Use Cathodes in high amperage technologies
Reflections on the Low Voltage Anode Effect in Aluminium Electrolysis Cells
Sampling and analysis methodology review to report total PFC emissions
SCALE FORMATION IN PRIMARY ALUMINIUM PRODUCTION
The Importance of Respecting the Underlying Science and Physics When Maximising Productivity and Return on Investment of Modern Aluminium Smelting Technology
The TMS Industrial Aluminum Electrolysis Course – History, Development of Contents, and Future
Vaporization of Fluorides from Aluminium Cells. Part II: Treatment of Spent Potlining in a Laboratory Furnace
Vaporization of Fluorides from Aluminium Cells. Part I: Theoretical Study on Replacement of Aluminium Fluoride and Soda

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