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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Cathode Wear Based on Autopsy of a Shut down Aluminium Electrolysis Cell
Author(s) Samuel Senanu, Tor Grande, Arne Petter Ratvik, Zhaohui Wang, Stein Rørvik, Christian Schøning
On-Site Speaker (Planned) Samuel Senanu
Abstract Scope To investigate cathode wear, an autopsy of a shut down aluminium electrolysis cell was conducted. The original lining consisted of a fully impregnated and graphitized carbon block and the cell was shut down after 2461 days operation. The cell was cleaned down to the surface of the carbon cathode, revealing the profile of the cathode wear. Generally, the cathode wear was uneven across the cell with typical potholes. At a finer length scale, the wear was characterized by small “pitholes” resembling wide shallow pitting corrosion. Samples of the cell lining were obtained by drilling cylindrical samples at different locations in the cell. These samples were analysed with respect to phase composition and microstructure by a combination of X-ray computed tomography, optical and electron microscopy. These findings are discussed in relation to the current understanding of the underlying mechanism(s) for cathode wear.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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