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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Electrode Technology
Presentation Title Effect of Coke Properties on the Bubble Formation at the Anodes during Aluminium Electrolysis in Laboratory Scale
Author(s) Wojciech Gebarowski, Arne Petter Ratvik, Stein Rørvik, Lorentz Petter Lossius, Hogne Linga, Ann Mari Svensson
On-Site Speaker (Planned) Wojciech Gebarowski
Abstract Scope The anodic reaction of aluminium electrolysis cells leads to the formation of CO2 bubbles, which partly screen the anode surface and leads to an increase in the cell voltage. An advantage of these bubbles is that the formation and release contribute to the stirring of the electrolyte, however, the screening of the surface increase in the irreversible energy losses. More profound knowledge about behaviour of gas bubbles related to anode properties is useful for minimize the screening effect and thus reduce the additional cell voltage. This work focus on the voltage oscillations caused by the formation, growth and release of bubbles at different carbon anode surfaces in lab-scale electrolysis experiments. The oscillations are correlated to properties of the cokes and the anodes, like coke isotropy, anode wettability determined by immersion-emersion tests, and coke fractions. Additionally, computed x-ray tomography imaging is used for investigation of post electrolysis anode surfaces.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

25 Years of Naural Gas Purged Infrared Pyrometer Temperature Measurement For The Operation Of Open-Top Anodes Baking Furnaces
3D Automated Anode Stub Inspection System
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
Coke Produced from Lower-Oxygen Fast-Pyrolysis Oil, a New Approach to Produce Renewable Anode Raw Materials
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
Finite Element Analysis of Slot Size Effect on the Thermal-Electrical Behaviour of the Anode
Flow Detection Module – A New Model to Predict the Flow in Open Pit Anode Baking Furnaces
Formation of Carbon Build-Up on the Flue Wall of Anode Baking Furnace
Gas Anodes Made of Porous Graphite for Aluminium Electrowinning
Hexapod Fleet Migration in Order to Upgrade to AP40LE Technology
Hydrodynamic and Thermoelectric 3D Mathematical Model of Aluminium Electrolysis Cell to Investigate Slotted Carbon Anode Efficiency
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 150°C
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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