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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


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