|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Experimental Investigation of the Alumina Cloud During Alumina Injections in Low And High Temperature Conditions
||Thomas Roger, Laszlo Kiss, Lukas Dion, Jean Francois Bilodeau, Sébastien Guérard, Guillaume Bonneau
|On-Site Speaker (Planned)
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.
||Planned: Light Metals
||Aluminum, Powder Materials, Other