Computational modeling of anodic current distribution and anode shape change in aluminium reduction cells
In aluminium reduction cells, the profile of a new carbon anode changes with time before reaching a steady state shape, since the anode consumption rate, depending on the current density normal to anode surfaces, varies from one region to another. In this paper, a two-dimension model based...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, Technical Faculty, Bor
2015-01-01
|
| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2015/1450-53391500006X.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | In aluminium reduction cells, the profile of a new carbon anode changes with
time before reaching a steady state shape, since the anode consumption rate,
depending on the current density normal to anode surfaces, varies from one
region to another. In this paper, a two-dimension model based on Laplace
equation and Tafel equation was built up to calculate the secondary current
distribution, and the shift of anode shape with time was simulated with
arbitrary Lagrangian-Eulerian method. The time it takes to reach the steady
shape for the anode increases with the enlargement of the width of the
channels between the anodes or between the anode and the sidewall. This time
can be shortened by making a sloped bottom or cutting off the lower corners
of the new anode. Forming two slots in the bottom surface increases the
anodic current density at the underside of the anode, but leads to the
enlargement of the current at the side of the anode. |
|---|---|
| ISSN: | 1450-5339 2217-7175 |