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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 Vaporization of Fluorides from Aluminium Cells. Part II: Treatment of Spent Potlining in a Laboratory Furnace
Author(s) Camilla Sommerseth, Samuel Senanu, Henrik Gudbrandsen, Stein Rørvik, Per Anders Eidem, Asbjørn Solheim, Morten Isaksen, Ellen Myrvold
On-Site Speaker (Planned) Camilla Sommerseth
Abstract Scope Today, spent potlining (SPL) from the aluminium industry is mainly placed on landfill. In a circular economy perspective, and with limited availability for landfill sites in the future, the industry is looking into ways of cleaning the SPL to produce saleable products. Vacuum vaporization was investigated to determine its applicability for removing fluorides from the graphite rich first cut SPL. It was demonstrated that vacuum vaporization at elevated temperatures is suitable for removal of fluorides. The condensate generally contained only cryolite and NaF, in accordance with theory. At the temperatures used it was impossible remove CaF2 or alumina from the SPL, due to the low vapour pressure. Hold time at elevated temperature and vacuum affected the amount of electrolyte removed. The findings comply with the theory for vaporization of fluoride mixtures.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum, Recycling and Secondary Recovery,

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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