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Meeting 2016 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Impact of the Heat Flux on the Solidification of a Cryolithe Based Bath
Author(s) Sandor Poncsak, László I Kiss, Csilla Kaszás, Véronique Dassylva Raymond, Sébastien Guérard, Jean François Bilodeau
On-Site Speaker (Planned) Sandor Poncsak
Abstract Scope The solidification of the electrolytic bath in Hall-Héroult cells includes the formation of a side-ledge, crust as well as temporal freeze layers around alumina agglomerates, new anodes or any cold object inserted into the bath. The structure and the chemical composition of solidified phases depend on the cooling heat flux (or cooling rate), which has a huge impact on the formation of crystals, amorphous phases and pores and on the rate of ion migration. The structure and chemical composition determine the heat loss through the side ledge, and the duration of the existence of a frozen bath around alumina agglomerates or new anodes. The authors of this paper created frozen bath samples under different heat flux conditions in well controlled laboratory environment in order to study the variation of the chemical composition and structure with the cooling rate. The results of this study are presented in this article.
Proceedings Inclusion? Planned: Light Metals Volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Novel Method for Processing Sodium Reduction Skimming Station Residue
Alcoa STARProbeTM – Update in Further Development for Measuring Cryolite Properties
Alumina Dissolution Modeling in Aluminium Electrolysis Cell Considering MHD Driven Convection and Thermal Impact
Alumina Handling in the Smelter- from Port to Pot
Aluminerie de Bécancour Conditioning Tower Replacement
Analysis and Visualization of Aluminum Reduction Cell Noise Based on Wavelet Transform
Anode Effect Initiation during Aluminium Electrolysis in a Two-compartment Laboratory Cell
Assessing the Role of Smelter Grade Alumina Porosity in the HF Scrubbing Mechanism
Characterization of Bubble Behavior in Aluminum Reduction Cells
Compact GTC Design: Reducing Footprint and Overall Steel Weight
Conception of a “Dream Cell” in Aluminium Electrolysis
Design and Demonstration of an Improved Automated Pot Tapping Method and Equipment
Design, Start-up and Performance of Four Gas Treatment Centers for the Ma’aden Smelter
Detection of Local Cell Conditions Based on Individual Anode Current Measurements
Development, Proof of Concept and Industrial Pilote of the New CHAC Scrubbing Technology : An Innovative Efficient Way to Scrub Sulfur Dioxide
Dynamic Response of Cryolitic Bath and Influence on Cell Heat and Mass Balance with Large Scale Potline Power Shifts
Effect of Carbon Dust on the Electrical Resistivity of Cryolite Bath
Elimination of Lithium from Aluminium Electrolyte by Acid Leaching Method
Enhancing Production Performance by Optimization All Resources at PT INALUM (Persero)
Evaluation of Gas Composition from Laboratory Scale Electrolysis Experiments with Anodes of Different Sulphur Content
Evolution of Crust Breaker Control for DX+ and DX+ Ultra Technologies
Hall-Héroult Cell Simulator: A Tool for the Operation and Process Control
Hydro’s Cell Technology Path towards Specific Energy Consumption below 12 kWh/kg
Impact of the Heat Flux on the Solidification of a Cryolithe Based Bath
Investigation of Sodium Sulfate Additions into Cryolite-Alumina Melts
Management and Performance of the Largest Gas Treatment Centre at EMAL Potline during Major Shutdown of Main Exhaust Fans
Modelling of Metal Flow and Metal Pad Heaving in a Realistic Reference Aluminium Reduction Cell
Numerical Investigation on the Impact of Anode Change on Heat Transfer and Fluid Flow in Aluminum Smelting Cells
On the Importance of Field Validation in the Use of Cell Thermal Balance Modeling Tools
Pilot Test of Aluminum Electrolysis by the NiFe2O4-M Inert Anodes
Polyvalent Impurities and Current Efficiency in Aluminium Cells: A Model Concerning Electrochemical Short Circuiting
QCL-based Perfluorocarbon Emission Monitoring
Recent Developments in Hyper-Dense Phase Alumina Handling Systems
Reduction Operating Experience on Power Shading at Maaden
Rio Tinto AP44 Cell Technology Development at Alma Smelter
SiC in Electrolysis Pots: An Update
Sideledge Facing Metal in Aluminium Electrolysis Cells: Preliminary Modelling Study of Bath Film Formation
Sideledge Facing Metal in Aluminium Reduction Cells: Freezing and Melting in the Presence of a Bath Film
Simulations on the Bath Chemistry Variables using Neural Networks
Sodium in Aluminum Metal of Operating Prebake Cells: Confirmation and New Findings
Studies on Anode Preheating Using Individual Anode Current Signals in Hall-Héroult Reduction Cells
Study on Effect of Al-O-C Compound in Alumina Carbonthermal Reduction
Sustainable Practices in Spent Potlining - an Industrial Ecology Approach
Sustainable Reduction of Anode Effect and Low Voltage PFC Emissions
Technology for Removal of Sulphur Compounds from Gases Generated during Aluminum Production
Technology Research on Decreasing the Aluminum Surface Waves and Reducing the Cathode Voltage Drop in Aluminum Electrolysis Cells
The 'Virtual Battery' – Operating an Aluminium Smelter with Flexible Energy Input
The Challenge to Supply Consistent Alumina Quality to All Pots on the Increasing Longer and Higher Capacity Potlines
The Competitive Adsorption of HF and SO2 on Smelter Grade Alumina
The Impact of Alumina Quality on Current Efficiency and Energy Efficiency in Aluminum Reduction
The Impact of the Cavity on the Top Heat Losses in Aluminum Electrolysis Cells
The LCL&L Process: A Sustainable Solution for the Treatment and Recycling of Spent Potlining
The Performance of Aluminium Electrolysis in a Low Temperature Electrolyte System
The Role of Key Impurity Elements on the Performance of Aluminium Electrolysis - Current Efficiency and Metal Quality
The Successful Implementation of DUBAL DX+ Technology at EMAL
Understanding the Basic Requirements of the Anode Set Modifier
Using Artificial Neural Network to Predict Low Voltage Anode Effect PFCs at the Duct End of an Electrolysis Cell

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