About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Aluminum Reduction Technology Across the Decades: An LMD Symposium Honoring Alton T. Tabereaux and Harald A. Øye
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Presentation Title |
Establishing a Chemical Model of the Melt in the Cathode |
Author(s) |
Lorentz Petter Lossius, Harald Arnljot Øye |
On-Site Speaker (Planned) |
Lorentz Petter Lossius |
Abstract Scope |
From 1990 Harald A. Øye supervised work to establish a model of the chemistry of the catholyte, the electrolyte in the carbon cathode during start-up and operation of Hall Héroult cells for both semi-graphitic and graphitic blocks. First part, lab scale, P. Brilliot tested a range of carbon materials and electrolyte compositions, running electrolysis for less than one hour to a few days. After, the cathode with frozen melt was cross sectioned and XRD showed the sequential change from electrolyte to catholyte. Full scale, Lorentz Petter Lossius collected cores from cathodes from cells stopped after 10 days to 2700 days. The results and understanding from the lab scale work could then be extrapolated and modified to the chemical processes occurring through the life-time of the cells. The paper recounts key analytical experiences than and today, and presents the set of chemical equations and associated thermodynamics. |
Proceedings Inclusion? |
Planned: Light Metals |