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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Effects of Current Density on Current Efficiency in Low Temperature Electrolysis with Vertical Electrode Structure
Author(s) Shengzhong Bao, Dengpeng Chai, Zhirong Shi, Junwei Wang, Guisheng Liang, Yanan Zhang
On-Site Speaker (Planned) Shengzhong Bao
Abstract Scope In this paper, ceramic based inert anodes and TiB2-C composite cathodes were used for electrolysis tests in KF-NaF-AlF3 based low-temperature electrolyte with vertical oriented electrodes, and the effects of current density on current efficiency and cathode performance were studied. The results showed that current efficiency could be significantly improved by increasing of current density, but when the current density was increased to a certain value, the current efficiency would significantly reduce. When the actual average current density of cathode projection plane was in the range of 0.27 A/cm2-0.47A/cm2, current efficiency could be reached more than 90%. When it was higher than 0.54 A/cm2, current efficiency was reduced significantly and unstable. And when it was over 0.65 A/cm2, cathodes were easy to crack or crust. Under the condition of high current density, the increase of aluminum loss was the main reason leading to the decrease and instability of current efficiency.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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Alucell: A Unique Suite of Models to Optimize Pot Performances and Design
Alumina Dissolution - A Critical Step in Aluminum Electrolysis
Anode Bottom Burnout Shape and Velocity Field Investigation in a High Amperage Electrolysis Cell
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Bubble Dispersion States in the Zinc Oxide Desulfurization Injection Blow Tank
C-33: Current Distribution on the Anode Bottom of the Aluminium Cell in the Complicated Conditions of Electrolysis
C-34: Investigate the Causes of Hole in Pots
C-35: Potline Start up without Anode Effect Frequency
C-36: Restarting Electrochemical Cell with a Cold Metal (D18 Cell)
C-37: The Impact of One Pot Tap out on the Secondary Alumina in Line Production
C-38: The Influence of Potassium Additive on Cryolite Molten Salt Structure and Transport Properties
C-39: Thermo-electrical Modeling of an Aluminum Reduction Cell
CFD Modelling of Alumina Feeding
Current Efficiency in Hall-Héroult Cells: The Role of Mass Transfer at the Cathode
Decision Matrix for Pneumatic Conveying and Distribution of Material
Development and Industrial Application of NEUI600 High Efficiency Aluminum Reduction Cell
Discussion on Alumina Dissolution and Diffusion in Commercial Aluminum Reduction Cell
DX+ Ultra Industrial Version: Preheat Start up and Early Operation
Effect of Steel Multi-collector Bars on Current Density and Magnetohydrodynamic Stability in an Aluminum Reduction Cell
Effects of Current Density on Current Efficiency in Low Temperature Electrolysis with Vertical Electrode Structure
EGA New D20+ Technology with Reduced Energy Consumption
Evaluating Effects of Future Shared Mobility and Electrification Trends on Key Intermediate Indicator of Aluminum Transportation Demand: US Vehicle Fleet Size
Impacts of Sodium on Alumina Quality and Consequences for Current Efficiency
Improved Abart Gas Treatment and Alumina Handling at the Karmøy Technology Pilot (KTP)
Improvement in Smelter Process Analysis through EGA Lab Modernization
Investigation of Alumina Concentration Gradients within Hall-Héroult Electrolytic Bath
Maximizing Previous Pot Design to Have Higher Capacity
MHD Generation of Liquid Metal Droplets in Aluminium Reduction Cell
Numerical Simulation Study on Gas Collecting System of 400kA Grade Aluminum Electrolytic Cell
On the Use of Multivariate Statistical Methods to Detect, Diagnose and Mitigate Abnormal Events in Aluminium Smelters
Partial Repair and Restart of a Damaged Aluminium Reduction Cell
RA-550 Cell Technology: UC RUSAL’s New Stage of Technology Development
Relationship between Aluminium Electrolysis Current Efficiency and Operating Condition in Electrolyte Containing High Concentration of Li and K
Selecting Technology for Achieving 300,000 T/Year - Why Do We Need to Compete Pot Technology?
Speed, Agility and Simplicity (SAS) Recovery of Reduction Line-5 in Alba
Spike Detection Using Advanced Analytics and Data Analysis
SPL: An Update
Study of Alumina Dissolution in Cryolitic Bath to Aluminum Production Process
Study on 3D Full Cell Ledge Shape Calculation and Optimal Design Criteria by Coupled Thermo-flow Model
The Successful Implementation of Energy Saving Technology Based on Steady Flow and Heat Preservation
Theory and Practice of High Temperature Gas Baking Technology for Alumninium Electrolysis Cells
Two-stage Pot Gas Treatment Technology Allowing the Production of Sodium Sulfate
Understanding and Defining Alumina Quality for Smelting
Very Low Energy Consumption Cell Designs: The Cell Heat Balance Challenge

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