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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title CFD Modelling of Alumina Feeding
Author(s) Kristian Etienne Einarsrud, Sindre Engzelius Gylver, Eirik Manger
On-Site Speaker (Planned) Kristian Etienne Einarsrud
Abstract Scope The dissolution and distribution of alumina in molten cryolite bath is a complex process, involving heat and mass transfer, phase transition and dynamics for a particle population with variable size and properties. Although single particle models can describe essential features of the process, they necessarily fail to capture features involving the interaction between particles (i.e. collisions and adhesion) and detailed coupling to the flow field, for which computational fluid dynamics (CFD) is needed. Several strategies and assumptions have been proposed in the literature, focusing on separate phenomena of relevance. Coupled models considering the full history of alumina particles have however not yet been developed. In the current work we investigate and review recent developments in coupled CFD particulate flow, aiming for general guidelines for implantation and use, with applications to both the gas-solid flow between the feeder and bath surface, and from the bath surface to dissolved alumina.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Alternative Roof-vent Emission Monitoring Method
Alucell: A Unique Suite of Models to Optimize Pot Performances and Design
Anode Bottom Burnout Shape and Velocity Field Investigation in a High Amperage Electrolysis Cell
AP44 Development at Alma
APXe Cell Technology: 7 Years of Low Energy Operation
Bubble Dispersion States in the Zinc Oxide Desulfurization Injection Blow Tank
CFD Modelling of Alumina Feeding
Current Distribution on the Anode Bottom of the Aluminium Cell in the Complicated Conditions of Electrolysis
Current Efficiency in Hall-Héroult Cells: The Role of Mass Transfer at the Cathode
Decision Matrix for Pneumatic Conveying and Distribution of Material
Development and Industrial Application of NEUI600 High Efficiency Aluminum Reduction Cell
Discussion on Alumina Dissolution and Diffusion in Commercial Aluminum Reduction Cell
DX+ Ultra Industrial Version: Preheat Start up and Early Operation
Effect of Changes in Anode Top Cover Composition on Anode Butt Quality
Effect of Steel Multi-collector Bars on Current Density and Magnetohydrodynamic Stability in an Aluminum Reduction Cell
Effects of Current Density on Current Efficiency in Low Temperature Electrolysis with Vertical Electrode Structure
EGA New D20+ Technology with Reduced Energy Consumption
Evaluating Effects of Future Shared Mobility and Electrification Trends on Key Intermediate Indicator of Aluminum Transportation Demand: US Vehicle Fleet Size
Impacts of Sodium on Alumina Quality and Consequences for Current Efficiency
Improved Abart Gas Treatment and Alumina Handling at the Karmøy Technology Pilot (KTP)
Improvement in Smelter Process Analysis through EGA Lab Modernization
Inert Anodes – the Blind Alley to Environmental Friendliness?
Investigate the Causes of Hole in Pots
Investigation of Alumina Concentration Gradients within Hall-Héroult Electrolytic Bath
Maximizing Previous Pot Design to Have Higher Capacity
MHD Generation of Liquid Metal Droplets in Aluminium Reduction Cell
Numerical Simulation Study on Gas Collecting System of 400kA Grade Aluminum Electrolytic Cell
On the Use of Multivariate Statistical Methods to Detect, Diagnose and Mitigate Abnormal Events in Aluminium Smelters
Partial Repair and Restart of a Damaged Aluminium Reduction Cell
Potline Start up without Anode Effect Frequency
RA-550 Cell Technology: UC RUSAL’s New Stage of Technology Development
Relationship between Aluminium Electrolysis Current Efficiency and Operating Condition in Electrolyte Containing High Concentration of Li and K
Restarting Electrochemical Cell with a Cold Metal (D18 Cell)
Role of the Porosity of Carbon Anodes in the Nucleation and Growth of Gas Bubbles
Selecting Technology for Achieving 300,000 T/Year - Why Do We Need to Compete Pot Technology?
Speed, Agility and Simplicity (SAS) Recovery of Reduction Line-5 in Alba
Spike Detection Using Advanced Analytics and Data Analysis
SPL: An Update
Study of Alumina Dissolution in Cryolitic Bath to the Vertical Soderberg (VSS) Aluminum Production Process
Study on 3D Full Cell Ledge Shape Calculation and Optimal Design Criteria by Coupled Thermo-flow Model
The Impact of One Pot Tap out on the Secondary Alumina in Line Production
The Influence of Potassium Additive on Cryolite Molten Salt Structure and Transport Properties.
The Successful Implementation of Energy Saving Technology Based on Steady Flow and Heat Preservation
Theory and Practice of High Temperature Gas Baking Technology for Alumninium Electrolysis Cells
Thermo-electrical Modeling of an Aluminum Reduction Cell
Two-stage Pot Gas Treatment Technology Allowing the Production of Sodium Sulfate
Very Low Energy Consumption Cell Designs: The Cell Heat Balance Challenge

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