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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Experience with Lengthy Pot Hibernation at Alcoa Baie-Comeau
Author(s) Xiangwen Wang, Marie-Eve Laframboise, Patricia Gagnon, Gilles Proulx
On-Site Speaker (Planned) Xiangwen Wang
Abstract Scope Two AP18 pots were put into sleep (hibernation state) from a normal production state. The pots were then maintained at the hibernation state for about 4 weeks. They were then woken up and successfully transitioned back to their normal operation. During the hibernation period, the pot was operated at the line current amperage and maintained around 840 to 860 degree C. This paper presents the pot thermal behavior and responses at different phases of the hibernation process from transitioning into a hibernation state, maintaining a stable sleep state, to waking up and transitioning back to a normal production state. Some special adjustments were necessary for each phase during the hibernation process. Interesting observations were made, some unanticipated events which had to be dealt with effective counter measures, are also presented and discussed.
Proceedings Inclusion? Planned: Light Metals


AP12 Low Energy Technology at ALRO Smelter
Carbon Dust - Its Short-Term Influence on Potroom Operations
Characterisation of Powders-precondition for Plant Engineering
Coupled SPH-DEM to Simulate the Injection of a Powder into a Liquid with Heat Transfer and Phase Change
Dissolution Characteristics and Concentration Measurements of Alumina in Cryolite Melts
Electrochemical Reduction and Dissolution of Aluminium in a Thin-layer Refinery Process
Experience with Lengthy Pot Hibernation at Alcoa Baie-Comeau
Gas Treatment in the GE Pot Integrated ABART Modules (PIA)
Hydro’s New Karmøy Technology Pilot: Start-up and Early Operation
Improvement to Alpsys Instability and Alumina Feeding Control
Individual Anode Current Monitoring during Aluminum Reduction Cell Power Reduction
Influence of Additives on Alumina Dissolution in Superheated Cryolite Melts
Instant Monitoring of Aluminum Chemistry in Cells Using a Portable Liquid Metal Analyzer
Introductory Comments: Aluminum Reduction Technology
Latest Developments in GTC Design to Reduce Fluoride Emissions
Low and High Voltage PFC Slope Coefficient Monitoring during Pot Start-up
Mass Transport by Waves: Bath-metal Interface Deformation, Rafts Collision and Physical Model
Modeling Anode Current Pickup After Setting
New Phase in Upgrade of Søderberg Technology at RUSAL’s Smelters
On Gaseous Emissions during Alumina Feeding
On the Feasibility of Using Low-melting Bath to Accommodate Inert Anodes in Aluminium Electrolysis Cells
Process and Environmental Aspects of Applying Unshaped Carbon Materials for Cell Lining Purposes
Superconductor Busbars – High Benefits for Aluminium Plants

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