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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Managing Power Interruptions at 360 KA Smelter
Author(s) Amit Jha, Amit Gupta, Pratap Sahu, Kamal Pandey, Senthil Nath
On-Site Speaker (Planned) Amit Jha
Abstract Scope Power interruptions as well as planned reduction can be difficult to manage due to challenges in thermal balance of the pot. At reduced internal heat, isotherms will shift inwards causing operational difficulties. Additionally, smelter also has pots with different design (standard collector bar & copper insert) and age groups, which react differently to amperage reduction. The study has been performed for a 360 kA potline to run at lower amperages, as low as 280 kA. Hence, computational & analytical models were used by smelter and R&D teams to identify the best cell operating window. The study was used to optimize pot control parameters like voltage adjustment, AlF3 feeding, forced cooling pressure, gas suction, metal/bath height, anode cover composition & height, covering/recovering practices etc. The actions taken at shop floor and control room helped to survive/recover pots during interruptions smoothly.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum,


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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