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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Electrode Technology Symposium for Aluminum Production
Presentation Title Transport of Sodium in TiB2 Materials Investigated by a Laboratory Test and DFT Calculations
Author(s) Zhaohui Wang, Arne Petter Ratvik, Jesper Friis
On-Site Speaker (Planned) Zhaohui Wang
Abstract Scope Inert, wettable cathodes have a significant potential for improving the Hall-Héroult electrolysis cell. TiB2 is considered the most promising inert cathode material, having good wetting properties towards aluminium. Allowing reduced ACD will result in lower energy consumption and, at the same time, potentially extend the cathode lifetime. However, the implementation of TiB2 is not straight forward, mostly due to the challenges of understanding the degradation mechanisms. Sodium vapour, which has proved to have great impact on traditional carbon cathodes, has drawn less attention for TiB2 materials. Thermogravimetric tests with various sodium vapour activities has been used to study the effect of sodium vapour on commercial TiB2 materials. Further, the chemical stability of TiB2 towards sodium and transport property of sodium in TiB2 materials have been investigated by atomistic calculations based on density state theory. Finally, a possible degradation scheme of TiB2 materials in environments subject to sodium exposure is proposed.
Proceedings Inclusion? Planned: Light Metals


3D Transient Modelling of a Complete Fire Line for Anode Baking Furnace Design and Optimization
A Study of Anode Baking Gas Composition
An XANES Study of Sulfur Speciation and Reactivity of Cokes Used for Aluminium Production
Analysis on the Material Balance Based on the Calcination Characteristics of a Chamber Calciner
Cathode Structure Optimization Research for Aluminum Reduction Cell
Challenges and Successes of Conducting Trials for Anode Design Modification
Development and Application of Electrocalciners with Increased Calcination Temperature
Development and Application of Large-scale Shaft Kilns
Effect of Cover Material on the Oxidation Speed of Prebaked Anodes
Effects of High-Sulfur Cokes on Physicochemical Properties of Prebaked Anodes in Aluminium Electrolysis
Formation of Aluminium Carbide in Hall-Héroult Electrolysis Cell Environments
Improved Compaction Method for the Production of Large Scale Anode Paste Samples for Thermo-mechanical Characterization
Influence of Crushing Technology and Particle Shape on the Bulk Density of Anode Grade Petroleum Coke
Interaction between Anode Aggregate and Binder in the Sessile Drop Wetting Test
Laboratory Study of the Impact of Cathode Grade on the Formation of Deposits on the Aluminium Cathode Interface in Hall-Héroult Cells
Method of Defining the Degree of Impregnation of the Dry Aggregate with Pitch in the Process of Anode Production
Multi-scale Modelling of TiB2 Degradation Using Crystal Elasticity Model and Density Functional Theory
Numerical Investigation of the Thermomechanical Behaviour of Anode Butt
Opportunities and Challenges Associated to Green Anode Plant Upgrade for Smelter Amperage Creeping
Research and Application for Large Scale, High Efficiency and Energy Saving Baking Furnace Technology
Research on the Penetration of Potassium-based Electrolyte into Dry Barrier Materials
Rotary Hearth Calcining of Petroleum Cokes
Simulation on the Initial Stage of Sodium-Graphite Intercalation Using First Principle Calculation
Study on Optimization of Anode Structure for Aluminum Reduction Cell
Study on the Calcination Performance and Desulfurization Mechanism of Petroleum Cokes with Different Sulfur Contents between 700-1100℃
Study on the Property and Desulfurization Mechanisms of Petroleum Cokes with Different Sulfur Contents from 1200℃to 2800℃
Systemic Analysis for the Selection of Anode Baking Furnace Refractories
The Current Status and Development Trend of the Prebaked Anode Market in China
The Research and Industrial Application of An Improved Impact Cleaning Technology of the Double Anode Butts in Aluminium Electrolysis
The Research and Trial of the Aluminum Electrolysis Cells with Current Flowing Out from the Bottom
Transport of Sodium in TiB2 Materials Investigated by a Laboratory Test and DFT Calculations
Understanding the Anode Porosity as a Means for Improved Aluminium Smelting

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