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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Electrode Technology
Presentation Title Cathode Wear in Electrowinning of Aluminum Investigated by a Laboratory Test Cell
Author(s) Zhaohui Wang, Saeid Nobakhtghalati, Asbjørn Solheim, Kati Tschöpe, Arne Petter Ratvik, Tor Grande, Anne Støre
On-Site Speaker (Planned) Zhaohui Wang
Abstract Scope The lifetime of an aluminium electrolysis cell is mainly determined by the cathode wear, especially for high amperage cells utilizing graphitized carbon cathodes. The underlying mechanisms for cathode wear are, however, complex and still subject to debate. Laboratory tests using inverted cell configurations have been used to study commercial cathode materials. Here we report on results obtained in the last 5 years for three different commercial cathode materials. The current density applied in the tests was in the range from 0 to 1.5 A/cm2 and the rotation speed of the cathode was from 0 to 125 rpm. The wear mechanisms with respect to current density, limiting current of Al4C3 formation and mass transport are discussed. In addition, the difference in the wear pattern of the three carbon materials is illustrated by X-ray computed tomography. Similarities and differences between wear observed in the laboratory and in industry cells are discussed.
Proceedings Inclusion? Planned: Light Metals Volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Anode Baking Furnace Fluewall Design Evolution: A Return of Experience of Latest Baffleless Technology Implementation
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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