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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Individual Anode Current Monitoring during Aluminum Reduction Cell Power Reduction
Author(s) Yuchen Yao, Jie Bao, Maria Skyllas-Kazacos, Barry Welch, Ali Jassim
On-Site Speaker (Planned) Yuchen Yao
Abstract Scope In this work, individual anode current measurement system is installed to monitor the aluminum smelting process during several case studies involving power reduction and restoration. In these studies, anode current signals, together with the line current and cell voltage, were obtained at a high sampling rate to ensure the dynamic features in the process are captured. It is observed that the cell exhibits “battery” behaviors on stopping the electrolysis process due to the anode having surface intermediates that have not been transformed into the final gaseous products. It is also found that some anodes experience negative currents during the reduction due to the changed magnetic fields, which may make the metal pad touch the anode, forming a closed circuit with other anodes. The analysis results provide more fundamental understandings of the aluminum reduction process and can aid the cell operations such as power modulation.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum, Electrometallurgy, Other

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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