|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Study of Heat Distribution due to Acd Variations For Anode Setting
||Choon-Jie Wong, Yuchen Yao, Jie Bao, Maria Skyllas-Kazacos, Barry Welch, Ali Jassim, Jing Shi
|On-Site Speaker (Planned)
The carbon anodes in a Hall-Héroult cell undergo continuous electrochemical oxidation and thus require periodic replacement. During setting of a cold new anode, bath freezes around it, causing the current flow to be impeded and redistributed to the other anodes. As the freeze slowly melts, anode current gradually increases, which causes further anode current redistribution. This event introduces significant disturbances which affect cell stability and thermal balance. Consequently, it is important to improve energy management and cell control during this event, which can be achieved through model-based approaches. Therefore, this work aims to develop a model that describes the effect of bath freezes on the dynamics of anode current pick up and redistribution, which will be useful for optimizing and further developing control strategies for anode setting. The anode current profiles during an anode setting event are simulated and compared to industrial cell measurements.
||Planned: Light Metals