| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
60 Years of Taking Aluminum Smelting Research and Development from New Zealand to the World: An LMD Symposium in Honor of Barry J. Welch
|
| Presentation Title |
Monitoring Cell Conditions and Anode Freeze Dissolution with Model-based Soft Sensor After Anode Change |
| Author(s) |
Choon-Jie Wong, Jie Bao, Maria Skyllas-Kazacos, Ali Jassim, Mohamed Mahmoud, Alexander Arkhipov |
| On-Site Speaker (Planned) |
Jie Bao |
| Abstract Scope |
Carbon anodes in Hall-Héroult cells are consumed continuously and changed periodically. The anode change operation introduces major energy deficit which adversely perturbs the mass and heat balance of the cell. The freeze formed underneath the newly-replaced anodes impedes normal bath circulation and mixing, removes local heat as it dissolves, and disrupts the normal anode current flow which deforms the metal pad via magnetohydrodynamic forces. These exacerbate the spatial non-uniformity in a cell which may lead to increased process faults and loss of process efficiency. This paper proposes the use of individual anode current measurements to monitor the dissolution of anode freeze in real-time. This helps to return the cell to nominal operation conditions quickly, by identifying issues such as low local superheat, as well as by enabling further improvements to operational procedures such as ACD adjustments for new anodes. This improves process and energy efficiencies following anode change operations. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Modeling and Simulation, Other |