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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Electrode Technology for Aluminum Production
Presentation Title Development of a Soft Sensor for Detecting Overpitched Green Anodes
Author(s) Adéline Paris, Carl Duchesne, Éric Poulin, Julien Lauzon-Gauthier
On-Site Speaker (Planned) Adéline Paris
Abstract Scope Increase in coke variability over the past few years has led to frequent changes in the optimum pitch demand (OPD) defined as the amount of pitch that yields the best anode properties for a given dry aggregate mix. Exceeding the OPD may cause post-baking anode sticking problems, thereby requiring additional operator interventions when unloading the baking furnaces and increasing losses due to scrapped anodes. This paper describes a new soft sensor developed for early detection of anodes with the potential to have sticking problem based on electrical resistivity measurements. Five resistivities measured at different points on approximately 120 000 individual anodes were used to build a Principal Component Analysis (PCA) model. A correlation was found between the anode sticking potential and the electrical resistivity data. It was shown that a breakdown in this correlation, as measured by the statistics of the Squared Prediction Error (SPE), may be used to detect post-baking sticking problems.
Proceedings Inclusion? Planned: Light Metals


10 Years of Anode Research and Development: Alcoa & Université Laval Experience
Additive Selection for Coal Tar Pitch Modification in Aluminum Industry
An EXAFS and XANES Study of V, Ni, and Fe Speciation in Cokes for Anodes Used in Aluminum Production
Anhydrous Carbon Pellets – An Engineered CPC Raw Material
Carbon Anode Raw Materials – Where is the Cutting Edge?
Charcoal and Use of Green Binder for Use in Carbon Anodes in the Aluminium Industry
Development of a Soft Sensor for Detecting Overpitched Green Anodes
Diffusion Measurements of CO2 within Carbon Anodes for Aluminium Smelting
Energy Saving in Hall-Héroult Cell by Optimization of Anode Assembly Design
Environmental Benefits of Using Spent Pot Lining (SPL) in Cement Production
Higher Baking and Production Levels in Anode Baking Furnaces and Associated Challenges
How to Improve the Environmental Efficiency of the Hall-Heroult Process While Producing and Using Carbon Anodes?
Influence of Particle Shape and Porosity on the Bulk Density of Anode Grade Petroleum Coke
Major Reconstruction of Central Casing of Open Top Baking Furnace with a View to Increase Its Lifespan and Reduce the Total Costs Comparing to Full Reconstruction
Modelling of Gas Injection on Anode Baking Furnace and Application to Operations
Purification of Graphite by Thermal Vacuum Treatment of Spent Potlining
Ready-to-Use Cathodes for the Hall-Héroult Process
Redesigning of Current Carrying Conductor - The Energy Reduction Initiative in Low Amperage Hall-Héroult Cell
Solids Flow Considerations and their Impact in Smelter Carbon Plant Operations and Product Quality
Sustainable Spent Pot Lining Management Guidance
Testing of SERMA Technology on Industrial Anodes for Quality Control in Aluminum Production
The Development of Anode Shape, Size and Assembly Designs - Past Present and Future Needs
The LCL&L Process: A Sustainable Solution for the Treatment and Recycling of Spent Potlining
Trends in Carbon Anode Production

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