About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Magnetic fields and their variation in aluminium reduction cells |
| Author(s) |
Valdis Bojarevics |
| On-Site Speaker (Planned) |
Valdis Bojarevics |
| Abstract Scope |
Magnetic fields in large-amperage aluminium electrolytic cells can be slowly varying in time due to internal electric current distribution changes, involving the associated full network busbar circuit. The ferromagnetic steel construction elements modify the total magnetic field due to their highly nonlinear magnetisation properties. The effects of the magnetic and electric field variation are important for the MHD stability, involving optional current modulation either in the full potline or in special compensating bus lines. Conventional computational modelling techniques are not well-suited due to the requirement to recompute the full field distribution coupled with the free surface and velocity field variation. The specialised MHD software, using an integral equation formulation for the magnetic field recomputed continuously in time, is described and applied to predict the well-known and new MHD stability features of commercial cells modified by arbitrary modulated current supply or due to the internal liquid metal horizontal current variation. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Modeling and Simulation, Magnetic Materials |