| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Aluminum Reduction Technology
|
| Presentation Title |
Cathode Inspection and Repair Procedure Improvements in ALBRAS |
| Author(s) |
Ana Carolina Amaral Guedes, Marvin Bugge, Michel Vidal Pena, Marcio Ney Souza, Ana Renata Monteiro Nunes, Adalberto Jonatas Cardoso Pastana |
| On-Site Speaker (Planned) |
Ana Renata Monteiro Nunes |
| Abstract Scope |
In February 2022, a power outage in Potline 2 in ALBRAS shut down 223 cells. As part of the restarting process, a methodology for evaluation and classification of cathodes was developed to support the decision on which ones to be restarted or not. As inspections proceeded some cells presented damages in the rammed slope that required repairs. A methodology for patching was standardized aiming to avoid potential future iron contamination. 211 cells were inspected, 186 were restarted, 108 were repaired according to the new methodology. This group performed better in the subsequent year: only 10% had to be relined against 32% in the not repaired group; 9% of the cells were restarted due to failure, against 14% in the other group. The same group also performs better in terms of iron contamination of operating cells. ALBRAS extended the new method to all 4 potlines after the end of the restart. |
| Proceedings Inclusion? |
Planned: Light Metals |