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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Aluminium Smelter Crust – Phase Distribution and Structure Analysis of Top Zone Layer
Author(s) Shanghai Wei, Jingjing Liu, George Allan, Tania Groutso, John Chen, Mark Taylor
On-Site Speaker (Planned) Shanghai Wei
Abstract Scope Anode cover material (ACM) partly fuses at the bottom where it interacts with anode and bath in the aluminium reduction cell. This consolidated material is defined as the top crust in the cell, and plays a crucial role in maintaining heat balance, protecting the carbon anode from air-burning and absorbing the fluorides evaporation in the cells. Previous studies have been conducted to illustrate the crust formation and properties. However, there is rarely a systematic structural analysis of crust in the vertical direction due to the complexity and inhomogeneity of industrial crust. In the present study, the phase composition of crust was systematically analysed in the vertical direction, and five zones were identified based on the phase composition. Furthermore, two types of particles are identified in top zone (1) namely: smelter grade alumina (SGA) and crushed bath particles (CBPs). A systematic analysis on CBPs have shown four types of structural features.
Proceedings Inclusion? Planned: Light Metals


A Laboratory Study of the HF Generation Potential of Particulate Fluorides from Cell Emissions
Adapting Modern Industrial Operation Parameters in a Standardized Laboratory Cell for Measuring Current Efficiency for Aluminium Deposition, Unexpected Challenges and Lessons Learned
Alumina Concentration Measurements in Cryolite Melts
Aluminium Smelter Crust – Phase Distribution and Structure Analysis of Top Zone Layer
An Advanced Nonlinear Control Approach for Aluminum Reduction Process
Anodic Incident Detection Through Multivariate Monitoring of Individual Anode Current Signals
Change of Anode Operation Pattern from Single to Double Staircase at Albras
Comparison Between Different Laminated Aluminum Busbars Expansion Joints in Terms of Mechanical Performance and Relative Costs
Demo Retrofit Study of a Chinese Inspired Cell Technology
Development and Application of GP500+ Energy Saving Aluminum Reduction Cell
Development of a Mathematical Model to Simulate Raft Rormation
Efficient Alumina Handling
Electrochemical Behavior of Cu-Al Oxygen-evolving Anodes in Low-temperature Fluoride Melts and Suspensions
Electrolysis of Low-temperature Suspensions: an Update
Fault Detection and Diagnosis of Alumina Feeding System using Individual Anode Current Measurement
Influence of Anode Cover Material Particle Size on Its Physical Property and Insulation Performance
Lab Scale Experiments on Alumina Raft Formation
Mass- and Heat Transfer During Dissolution of Alumina
MassTransport by Waves on the Bath Metal Interface in Electrolysis Cell
Measurement System for Fugitive Emissions in Primary Aluminium Electrolysis
Method Development to Estimate Total Low Voltage and High Voltage PFC Emissions
Model Based Approach for Online Monitoring of Aluminium Production Process
Numerical Investigation of Flow Field Effect on Ledge Shape in Aluminum Reduction Cell by Coupled Thermo-flow Model
Optimization of a Gas Treatment Center Equipped with Extended Surface Bag Filters
Oxidation Study of Zinc sulfite on the Removal of Sulfur Dioxide from Aluminum Electrolysis Flue Gas by Zinc Oxide
Predictive Analytics for Enhancing Productivity of Reduction Cells
Recycling of the Flue Gas from Aluminium Electrolysis Cells
Reducing the Carbon Footprint: Aluminum Smelting with Changing Energy Systems and the Risk of Carbon Leakage
Research and Application of Direct Welding Technology on Super Large Section Conductor
Restart of Shutdown Pots - Troubles, Solutions and Comparison with Normal Pots to Improve Results
Status Analysis of Particle Size Distribution and Attrition Index of the Smelter Grade Alumina
Study of Heat Distribution due to Acd Variations For Anode Setting
The Application of the“Intelligent Breaking & Feeding Technology” for Aluminum Pot Line
The Australian Energy Crisis, its Impact on Domestic Aluminium Smelting and Potential Solutions
The Effect of Hard Grey Scale Deposition on the Wall Heat Flux of a Cold Finger
The Influence of Polarization on the Wetting of Graphite in Cryolite-alumina Melts
The Rate of HF Formation During Addition of Alumina to Cryolite Melts
Toward Minimizing the of Co-evolution of PFC Emission in EGA Smelter
Update on SO2 Scrubbing Applied in Primary Aluminium Smelters
Update on the Abart Gas Treatment and Alumina Handling at the Karm°y Technology Pilot
Utilization of Waste Heat for Pre-heating of Anodes
Validation of QCL CF4 Gas Analyzer for Sensitivity and Selectivity
Validation of the Gravimetric Method to Properly Follow Alumina Dissolution in Cryolithic Bath

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