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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


A Pragmatic Model for Alumina Feeding
A Water Model Study of Alumina Feeding and Dispersion
Advanced Alumina Dissolution Modelling
An Attempt to Estimate the Sulfuric Acid Dewpoint in the Flue Gas from Aluminium Electrolysis Cells
Bauxite & Alumina: Now and In the Future
Concentration Distribution of Carbon Particles in Aluminium Electrolysis Cells
Developing and Implementing an Efficient Forced Cooling Network at Aluminerie Alouette
Direct Production of Aluminum Manganese and Silicon Alloys in Aluminum Reduction Cells, A Laboratory Test
Direct Production of Aluminum Titanium Alloys in Aluminum Reduction Cells, A Laboratory Test
Empirical Prediction of Alumina Dissolution Rate in a Cryolitic Melt: Comparison with the Existing Literature
Imaging Alumina Distribution Using Low-voltage Anode Effect Detections in Anodic Current
Managing Power Interruptions at 360 KA Smelter
Mass Transport by Waves: Physical Model with Coalescence, Fragmentation, and Displacement on a Bath-metal Interface
Modeling of the Heat Exchange, the Phase Change, and Dissolution of Alumina Injected in Electrolysis Cells
Oxide Sensor Measurements and Simultaneous Optical Observations during Dissolution of Alumina in Cryolite Melt
Preparation of Aluminum Master Alloys by Electrolytic Co-deposition in Hall-Héroult Cells
Restart of Copper-insert Pots in EGA's High Amperage Potlines
Stabilizing a Low-dimensional Model of Magnetohydrodynamic Instabilities in Aluminum Electrolysis Cells
Statistical Model for Forecasting the Cell Replacement Rate in an Aluminum Smelter
Strategic Training and Development of Smelter Teams to Improve Business Outcomes
The Survivability of Aluminum Potlines after Lengthy Electrical Power Outages
Trace Elements in Aluminium Smelting Carbon Dust and Their Extraction

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