About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Reduction Technology
|
Presentation Title |
Advanced Alumina Dissolution Modelling |
Author(s) |
Valdis Bojarevics, Marc Dupuis |
On-Site Speaker (Planned) |
Valdis Bojarevics |
Abstract Scope |
Alumina feeding requires optimization for the feed amount, timing, and point feeder locations. The alumina raft formation and dispersion are the essential features leading to particles of various sizes to travel with the bath flow along anodes in the central channel, in the bath volume beneath the anodes, and gradually dissolving. The raft motion and particles are traced accounting for their inertia, drag in the turbulent flow, and the anode bottom surface shape. The large-scale MHD-driven circulation in the cell is modelled using specific inputs corresponding to real commercial cells of various types. The time-dependent feed material rafts and particles gradually dissolve in the dependence of the local turbulent diffusion and the instantaneous concentration level below saturation in the location. The newly developed modelling technique is applied to illustrate possible optimization of the feeder locations, the variable feeding time intervals and possible adjustments in the long-term process. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Process Technology, Aluminum, Modeling and Simulation |