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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title An Attempt to Estimate the Sulfuric Acid Dewpoint in the Flue Gas from Aluminium Electrolysis Cells
Author(s) Asbjorn Solheim
On-Site Speaker (Planned) Asbjorn Solheim
Abstract Scope The sulfuric acid dewpoint in the flue gas from aluminium electrolysis cells increases with increasing concentrations of sulfur dioxide and water vapour. This represents a potential problem in a future scenario with reduced air draught for increased carbon dioxide capture and heat exchangers for cooling or heat collection. A pragmatic model was derived, based on kinetics for the sulfur dioxide to trioxide conversion and models for estimating the temperature and air penetration into the flame. The results indicate that oxidation of carbon monoxide as well sulfur dioxide takes place mainly less than 10 cm above the crust opening. The dewpoint increases with decreasing current efficiency and with increasing area and diameter of the crust openings. In the base case, which was thought to be representative for a modern prebake cell, the dewpoint was 73 °C. The dewpoint may increase if sulfur trioxide is refluxed with the secondary alumina.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum, Electrometallurgy,


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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