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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Electrode Technology
Presentation Title Uneven Cathode Wear in Aluminium Reduction Cells
Author(s) Tao Li, Stein Tore Johansen, Asbjørn Solheim
On-Site Speaker (Planned) Tao Li
Abstract Scope The service life of aluminium reduction cells is limited by cathode wear. A typical wear pattern has been reported as a single or double "W" profile. The uneven cathode wear appears to be controlled by multiple mechanisms such as non-uniform current distribution and carbide dissolution. According to our analyses, formation of aluminium carbide that dissolves into a bath film located on the cathode surface is the dominating mechanism. A dynamic model was developed in order to calculate the local carbide formation as well as cathode wear rate. The present model utilizes a simplified geometry where the metal flow, which is driven by the Lorentz force, results in shear stress and motion of the bath film. The simulations demonstrate how the local current distribution and the mass transfer of aluminium carbide from the cathode surface and into the bath film result in uneven cathode wear profiles.
Proceedings Inclusion? Planned: Light Metals Volume


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Cathode Wear in Electrowinning of Aluminum Investigated by a Laboratory Test Cell
Characterization of Carbon Anode Materials by Image Analysis
Copper Bars for the Hall-Héroult Process
Effect of Cathode Collector Copper Inserts on the Hall-Héroult Cell MHD Stability
Effect of Heating Rate during Baking on the Properties of Carbon Anodes Used in Aluminum Industry
Electrochemical Reactivity and Wetting Properties of Anodes Made from Anisotropic and Isotropic Cokes
Empirical Modeling of the Baking Furnace to Predict Baked Anode Properties
In Situ Investigation of the Behavior of Anode Assemblies
Interfacial Boundary between Carbon Anodes and Molten Salt Electrolyte
Journey towards World-Class Operational Effectiveness at DUBAL (EGA Jebel Ali Operations) Paste Plant
Low Resistance Anode Assembly Using Steel Stubhole Conductors across the Cast Iron to Carbon Interface
Measurement of the Electric Current Distribution in an Anode
MIREA: An On-line Quality Control Equipment Integration in an Operational Context
Modeling Gravity Wave in 3D with OpenFoam in an Aluminum Reduction Cell with Regular and Irregular Cathode Surfaces
Porous Carbon Anodes for the Supply of Methane during Electrowinning of Aluminium
Quantification of Sodium Present in Dry Aggregates and Anodes
Simulation-Based Decision Support in Cathode Relining Facility Scaling
Study of the Wetting of Coke by Different Pitches
The Start up & the Operation Performance of the Twin Green Anode Plant at Ma'aden Aluminium Smelter in Saudi Arabia
Uneven Cathode Wear in Aluminium Reduction Cells
Upgrade of the Firing and Control System at Egyptalum for Dual Fuel Firing

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