|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Validation of the Gravimetric Method to Properly Follow Alumina Dissolution in Cryolithic Bath
||Jonathan Alarie, Thomas Roger, László I. Kiss, Sándor Ponsáck, Sébastien Guérard, Jean-François Bilodeau
|On-Site Speaker (Planned)
Alumina dissolution is now one of the greatest concerns related to the Hall-Heroult process optimization. For this reason, a gravimetric method was developed to study alumina dissolution kinetic, by following the evolution of the apparent weight of alumina samples while immerged into a cryolithic bath. The apparent weight is resulted from different forces acting on the sample such as surface tension at the interface, gravity and buoyancy. It is the change of the gravity and buoyancy on the sample that can help to determine the dissolution rate. The experimental results obtained by this method were compared to four other values; those found in the literature, a CFD model developed by our team, the total mass difference over experience time and finally to a boundary displacement method. The boundary displacement and the CFD model have also demonstrated a strong dependence of the dissolution rate on the convection around the sample.
||Planned: Light Metals