|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Evolution of Crust Breaker Control for DX+ and DX+ Ultra Technologies
||Konstantin Nikandrov, Abdalla Zarouni, Sergey Akhmetov, Nadia Ahli, Michel Reverdy
|On-Site Speaker (Planned)
Crust breakers with bath sensing modules were introduced in DX+ cells since their start-up in 2010. The modules give signals to the pot control system when a breaker tip touches liquid bath. This paper describes steps in development and optimization of the break and feed control logic, from diagnostics of unsuccessful breaking or bath sensing to treatment procedures. Breaking problems can be linked to equipment or the process. Sticking of bath on breakers, narrow breaker holes and alumina accumulation on crust cannot be diagnosed automatically but the control system can help if these problems are identified and entered into the system by the operator. Bath sticking is more frequent on middle breakers which are located in the hottest zone of the cell. Narrow holes and alumina accumulation mostly occur in the coldest zones of the cell. Breaking control logic was modified in order to minimize abnormalities.
||Planned: Light Metals Volume