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A taxonomy of low-voltage perfluorocarbon emissions in primary aluminium production cells

Boulanger Joan, Lalancette François, Gosselin A., Dion Lukas, Gaboury Simon, Guimond L., Simard C. et Blais A.. (2020). A taxonomy of low-voltage perfluorocarbon emissions in primary aluminium production cells. Dans : Conference of Metallurgists , 24-27 aug 2020, Fairmont Royal York, Toronto.

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Résumé

The screening of the data obtained from a primary Aluminium production cell equipped with CF4, anodic current, line intensity, and voltage sensors during a six-week measurement campaign shows that the Low-Voltage Anode Effects (LVAE) at the scale of a single anode enshrine typical but various footprints into the anodic current signals. These footprints can exhibit shapes in ‘V’, of a backward facing step profile, or a combination of both. ‘V’ shapes tend to be relatively short term while ‘Step’ shapes are usually longer-lasting. The drop magnitude of these signatures furthermore covers a relatively wide range. ‘V’ shapes tend to be deep and ‘Step’ shapes shallow. Anodic currents are efficient to identify cell zones prone to LVAE. This is certainly helpful to assess and optimise feeding schemes. On the other hand, the variety of the patterns imprinted within the anodic current time series by LVAE events exacerbates the challenges to reliably detect those using automated systems. The understanding of the shapes these patterns can take provides a guidance for the future design of a detection algorithm.

Type de document:Matériel de conférence (Non spécifié)
Date:14 Septembre 2020
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
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Mots-clés:Aluminium smelter, anode current, low-voltage anode effect, perfluorocarbon, signal patterns, fonderie d'aluminium, courant d'anode, effet d'anode basse tension, perfluorocarbone, modèles de signaux
Déposé le:27 janv. 2021 20:58
Dernière modification:28 janv. 2021 13:40
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