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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Dissolution Characteristics and Concentration Measurements of Alumina in Cryolite Melts
Author(s) Luis Bracamonte, Vegard Aulie, Christian Rosenkilde, Kristian Einarsrud, Espen Sandnes
On-Site Speaker (Planned) Luis Bracamonte
Abstract Scope Acquirement of reliable data is a key factor to better understand alumina dissolution, one of the most important processes in the Hall-Héroult process. Simultaneous video recording of the alumina addition and dissolution and in situ measurements of alumina concentration in cryolite melts in a see-through oven, can be a powerful method to reveal crucial information such as the behavior and the variation of the alumina concentration during the entire dissolution process. The sensor data reflecting the actual dissolved alumina in the melt, is interesting individually, but especially when analyzed together with the alumina-bath interaction obtained from the see-through cell. In this work, video recording using a high-speed camera and electromotive force (emf) based alumina sensor measurements were performed during the addition of alumina and throughout the entire dissolution process. The measurements were performed in a see-through cell changing different variables such as alumina quality, alumina particle size and bath composition.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum,

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Coupled SPH-DEM to Simulate the Injection of a Powder into a Liquid with Heat Transfer and Phase Change
Dissolution Characteristics and Concentration Measurements of Alumina in Cryolite Melts
Electrochemical Reduction and Dissolution of Aluminium in a Thin-layer Refinery Process
Experience with Lengthy Pot Hibernation at Alcoa Baie-Comeau
Gas Treatment in the GE Pot Integrated ABART Modules (PIA)
Hydro’s New Karmøy Technology Pilot: Start-up and Early Operation
Improvement to Alpsys Instability and Alumina Feeding Control
Individual Anode Current Monitoring during Aluminum Reduction Cell Power Reduction
Influence of Additives on Alumina Dissolution in Superheated Cryolite Melts
Instant Monitoring of Aluminum Chemistry in Cells Using a Portable Liquid Metal Analyzer
Introductory Comments: Aluminum Reduction Technology
Latest Developments in GTC Design to Reduce Fluoride Emissions
Low and High Voltage PFC Slope Coefficient Monitoring during Pot Start-up
Mass Transport by Waves: Bath-metal Interface Deformation, Rafts Collision and Physical Model
Modeling Anode Current Pickup After Setting
New Phase in Upgrade of Søderberg Technology at RUSAL’s Smelters
On Gaseous Emissions during Alumina Feeding
On the Feasibility of Using Low-melting Bath to Accommodate Inert Anodes in Aluminium Electrolysis Cells
Process and Environmental Aspects of Applying Unshaped Carbon Materials for Cell Lining Purposes
Superconductor Busbars – High Benefits for Aluminium Plants

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