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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Study of Impact of the Anode Slots on the Voltage Fluctuations of Aluminium Electrolysis Cell Using Bubble Layer Simulator
Author(s) Sandor Poncsak, László Istvan Kiss, Sébastien Guérard, Jean François Bilodeau
On-Site Speaker (Planned) Sandor Poncsak
Abstract Scope There is a constant effort from the aluminium producers to reduce energy consumption of the Hall-Héroult cells in order to decrease cost and environmental fingerprint. Among others, slotted anodes were introduced in order to promote faster evacuation of the electrically isolating anode gas bubbles and thus diminish their contribution to the total cell voltage. A bubble layer simulator was developed to reproduce cell voltage fluctuations, caused by the dynamics of anode bubbles. Results show that the slots cut in the right position and direction can reduce both the amplitude of fluctuations and the average cell voltage. This impact is even higher for new, almost horizontal flat anode bottom. It is also revealed that the slots are not only acting as bubble sink, but they contribute to the acceleration of the bubble layer and thus their role in the momentum exchange between liquid and gas must be taken into account.
Proceedings Inclusion? Planned: Light Metals


Aging of Insulating Linings in Aluminium Electrolysis Cells
Alternative Applications of SPL: Testing Ideas through Experiments and Mathematical Modeling
Application of Multivariate Statistical Process Control with STARprobeTM Measurements in Aluminium Electrolysis Cells
Bauxite Processing via Chloride Route to Produce Chloride Products and Subsequent Electrolysis of Aluminium Chloride to Produce Aluminium Metal
Cathode Wear Based on Autopsy of a Shut down Aluminium Electrolysis Cell
Chemical Stability of Thermal Insulating Materials in Sodium Vapour Environment
Clustering Aluminium Reduction Cells
Co-evolution of Carbon Oxides and Fluorides during the Electrowinning of Aluminium with Molten NaF-AlF3-CaF2-Al2O3 Electrolytes
Detecting, Identifying and Managing Systematic Potline Issues with Generation 3 Process Control
DX+ Ultra – EGA High Productivity, Low Energy Cell Technology
Enabling Efficient Heat Recovery from Aluminium Pot Gas
Fluoride Capture Capacity of SGA: The Interplay between Particle and Pore Size Distribution
Implementation of D18+ Cell Technology at EGA Jebel Ali Smelter
Improving the Understanding of Busbar Design and Cell MHD Performance
Influence of Handling Parameter on Powder Properties
Integrating a New Smelter Supervision HMI in Existing Control Systems at ALBRAS
LES Turbulence Modeling Approach for Molten Aluminium and Electrolyte Flow in Aluminum Electrolysis Cell
Low Energy Consumption Cell Designs Involving Copper Inserts and an Innovative Busbar Network Layout
MHD of Large Scale Liquid Metal Batteries
Minimizing Cathode Voltage Drop by Optimizing Cathode Slot Design
Partial Anode Effect in a Two-Compartment Laboratory Alumina Reduction Cell
Pot Gas Treatment at High Gas Temperatures
Potroom HF Emission Reduction by Anode Inert Tray Technology Performances of ALRO Industrial 1st of Class
Predicting Instability and Current Efficiency of Industrial Cells
Predictive Formula for the Competitive Adsorption of HF and SO2 on Smeltergrade Alumina Used in Dry Scrubbing Applications
Preventive Treatment of Anode Effects Using On-Line Individual Anode Current Monitoring
Reduction in EGA Jebel Ali Potroom GHG Emissions
Retrofit of Damaged Corner Risers by Means of Bolted Connections
Role of Heat Transfer in the Formation of Carbon Oxides in Smelting Cells
Sodium in Aluminium as a Cell Performance Indicator: A Quantitative Framework
SPL Recycling and Re-Processing
Spreading of Alumina and Raft Formation on the Surface of Molten Cryolite
Stability of Chlorides in Cryolitic Electrolyte
Study of Impact of the Anode Slots on the Voltage Fluctuations of Aluminium Electrolysis Cell Using Bubble Layer Simulator
Surviving an Extended Power Outage after a Break Down in the Sub Station
The Successful Implementation of AP40 Technology at Kitimat

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