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Developing a new process indicator based on the relationship between an electrolysis cell impurity balance and its incident

Dion Lukas, Kiss László, Lavoie Dany et Arvisais Jean-Paul. (2014). Developing a new process indicator based on the relationship between an electrolysis cell impurity balance and its incident. Dans : 143rd Annual Meeting & Exhibition, TMS Light Metals 2014 , February 16-20, 2014, San Diego, CA.

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Résumé

Aluminerie Alouette recently studied the relationship between electrolysis cell operation and their impurities’ balance. It was observed in some cases that the concentration of impurities in the metal is lower than expected from raw material mass balance, mainly for iron, gallium, titanium and vanadium. These cells were inspected to find the cause of the imbalance; methodology and results of the inspection are presented in this paper. Analyses regarding cell performance were conducted with regard to cell impurities distribution (metal/crust/gas duct). The factors correlating these phenomena are discussed, with focus on operational results. It was found that anodic incidents are strongly related to very low impurity concentrations in the aluminium and it was possible to develop an indicator at Aluminerie Alouette to quickly detect anodic incidents using vanadium content in the aluminium. This process tool is presented and discussed in the article.

Type de document:Matériel de conférence (Non spécifié)
Date:2014
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Liens connexes:
Mots-clés:Electrolysis cell, incidents, spikes, iron, vanadium, mass balance, impurities, Cellule d'électrolyse, incidents, pics, fer, vanadium, bilan massique, impuretés
Déposé le:27 janv. 2021 20:47
Dernière modification:27 janv. 2021 20:47
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