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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Electrode Technology
Presentation Title Reducing Cathode Voltage Drop and Reducing Peak Current Density by Use of Cathode Nails across the Carbon to Cast Iron Interface
Author(s) Will Berends, Stephen Haley
On-Site Speaker (Planned) Will Berends
Abstract Scope The solidification shrinkage of cast iron between the collector bar and carbon slot surfaces of a cathode assembly introduces low contact pressure and high electrical contact resistance, particularly at the top of the cathode slot. The use of steel nails to bridge the cast iron shrinkage gap lowers the contact resistance significantly. Recent laboratory testing of varying densities and diameters of nails in the cathode assembly demonstrates the reduction of resistance that is possible through the top of the cathode slot, and the corresponding reduction of resistance through the cathode. The selective use of cathode nails towards the centre of the collector bar is modeled to demonstrate the potential of improved current distribution with reduced peak current density.
Proceedings Inclusion? Planned: Light Metals


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Anode Carbon Aggregate Packing Description Compared to Relevant Industrial and Engineering Practises
Anode Quality Improvement at INALUM Smelter
Characterization of Prebake Anodes by Micro X-ray Computed Tomography
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CPC Testing and Relationship between Coke and Anode Physical Properties
Development of Techniques and Tools for the Determination of Carbon Anode Quality
Effect of Coke Properties on the Bubble Formation at the Anodes during Aluminium Electrolysis in Laboratory Scale
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Identification of the Stress Intensity Factor of Carbon Cathode by Digital Image Correlation
Impact of Cast Iron Degradation and Cathode Block Erosion on the Current Path in the Cathodic Assembly of Aluminum Production Cells
Influence of Calcination Temperature and Sulfur Level on Coke Properties
Investigation of Spent Refractory Lining in an Anode Baking Furnace
Non-destructive Testing of Baked Anodes Based on Modal Analysis and Principal Component Analysis
Pilot Anode Properties of Binder Pitches Softening between 110 and 150C
Production of NiFe2O4 Nanocermet for Aluminium Inert Anode
Reducing Cathode Voltage Drop and Reducing Peak Current Density by Use of Cathode Nails across the Carbon to Cast Iron Interface
The Impact of Anode Nails on the Stub to Carbon Electrical Contact Resistance of Anode Assemblies with Simulated Corroded Stubs
The Impact of Increased Anode Size and Amperage Creep on Anode Management
Use of Thermally Desulfurized Shaft CPC for Anode Production
Xelios 2.0: Return on Experience for the Advanced Eco-designed Vibrocompactor

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