| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Aluminium Carbide and Carbon Dust in Aluminium Electrolysis Cells. A Conceptual Model for Loss in Current Efficiency
|
| Author(s) |
Asbjorn Solheim |
| On-Site Speaker (Planned) |
Asbjorn Solheim |
| Abstract Scope |
Aluminium carbide and carbon dust cause operational problems in aluminium electrolysis cells. A tentative qualitative mass balance for carbon and carbide is suggested, and the structure model by Ødegård et al. for dissolved aluminium carbide in the bath was verified. The transport of carbon from the cathode across the metal-bath interface was modelled. The main part of the current work consists of the derivation of a conceptual model for loss in current efficiency (CE) caused by aluminium carbide formation by reaction between carbon dust and dissolved metal close to the cathode. The concentrations of dissolved metal, carbon particles, and aluminium carbide close to the cathode were calculated. The loss in CE was computed for different values of the reaction rate constant and the amount of carbon dust. It appeared that the loss in CE is probably controlled by the kinetics of the chemical reaction involved. |
| Proceedings Inclusion? |
Planned: Light Metals |
| Keywords |
Aluminum, Electrometallurgy, Modeling and Simulation |