|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Dissimilar Results in Restarting Two Different Potlines
||Maria CAROLINA Daviou, Maria Alejandra Mollecker Rausch, Ricardo Alonso, Maria Fernanda Jaitman
|On-Site Speaker (Planned)
||Maria CAROLINA Daviou
In March 2020, Aluar reduced its production. Two potlines with different technologies were halted within two weeks’ time. Metal was left in the pots in order to preserve the cathode conditions during stoppage, so the repair procedure for the restart consisted in cleaning the metal surface, sidewall repairing and gas preheating.
The restartup of AP22 pots in Potline C was successfully accomplished six months later, with no incidents and a low early failure rate. Two years after, a pre-existed failure mode was identified during the restart of end-to-end al20 pots in Potline B. As a result, a higher amount of pots could not survive.
This paper highlights the experience gained of a planned but necessary shutdown of 344 pots together with the challenges involved, not only in restarting two different potlines in a completely diverse context, but also in the strategic criterion proposed for a pot restart in each case.
||Planned: Light Metals