| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Imaging Alumina Distribution Using Low-voltage Anode Effect Detections in Anodic Current |
| Author(s) |
Joan Boulanger, Anne Gosselin, Simon Gaboury, Louis Guimond, Claude Simard, Alexandre Blais, Francis Lalancette |
| On-Site Speaker (Planned) |
Joan Boulanger |
| Abstract Scope |
From the observations in continuous anodic currents of the various patterns associated with Low-Voltage Anode Effects (LVAE) at the scale of single anodes, a signal processing approach is devised for automated detection. High precision and sensitivity are obtained from a training of the level-based change-point detection algorithm using evolutionary optimisation and data carefully screened from resistance, CF4 emissions, anodic and line current time series. The possibility of detecting a wide range of LVAEs allows one for tracking cell zones recurrently lean under the hypothesis that LVAEs are solely associated with a lack in Alumina. Detection spatial statistics shape a kind of tomography for Alumina distribution diagnostics. In the technology studied, characteristic and stable Alumina distribution inhomogeneities are reported. This capability to draw qualitative mapping of Alumina inhomogeneity paves the way to the development of enhanced feeding mechanisms with spatial intelligence to diminish Alumina variability and improve the process. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Process Technology, Environmental Effects |