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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Aluminum Reduction Technology
Presentation Title Experimental Investigation of the Alumina Cloud During Alumina Injections in Low And High Temperature Conditions
Author(s) Thomas Roger, Laszlo Kiss, Lukas Dion, Jean Francois Bilodeau, Sébastien Guérard, Guillaume Bonneau
On-Site Speaker (Planned) Thomas Roger
Abstract Scope Alumina injections are the most frequent discrete events occurring in aluminum reduction cells. During each feeding, a significant fraction of the mass injected will float and create a raft composed of alumina and frozen bath which hinders the dissolution rate of the alumina. However, a small fraction of the alumina sinks in the form of a cloud in the electrolyte which establish idealize dissolution conditions. Specific investigations were performed to understand the fraction of particles in each specific state and the clouds geometrical patterns. An analog experimental setup is presented to observe the cloud at low temperature. Organics particles, cooled with liquid nitrogen, were injected in water. Each experimental injection performed were analyzed during formation of the ice-particle raft to determine the surface and the density of the cloud. The results are compared with experimental injections performed in molten cryolite using a see-through cell to pinpoint the similitude and disparities.
Proceedings Inclusion? Planned: Light Metals
Keywords Aluminum, Powder Materials, Other


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Application of Cell Retrofit in GP320 Aluminum Reduction Cell Line
CFD Modelling of Solidification and Melting of Bath during Raft Formation
Dissimilar Results in Restarting Two Different Potlines
Evaluation of Methodologies for Assessment of SO3 Concentration in Industrial Off-gas
Experimental Investigation of the Alumina Cloud During Alumina Injections in Low And High Temperature Conditions
Fundamental Mass Transfer Correlations Based on Experimental and Literature Data
Fundamentals of Pot Ventilation in Aluminum Smelters
Mathematical Modelling of the Desulfurization of Electrolysis Cell Gases in a Low Temperature Reactor
Numerical Investigation of the Thermal, Electrical and Mechanical Behaviour of Aluminum Reduction Cell during Preheating Phase
Potential of Production Al-Si Green Alloys in AP18 Aluminium Reduction Cell
Preheat, Start-up and Early Operation of DX+ Ultra Pots at 500 kA
Recent Improvements to a Mathematical Model Replicating the Wave and Stream at the Bath-metal Interface
Restart of Albras’ Potline 2 – Improving Performance and Changing Paradigms
Simplified 3D MHD Model for Quick Evaluation of Aluminium Electrolysis Cell Design
The Expanded Industrial Pilot of SAMI’s NCCT+ Technology
The SY500 Potline Technology Development

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