|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||The Impact of Alumina Quality on Current Efficiency and Energy Efficiency in Aluminum Reduction
||Grant McIntosh, James B. Metson, Pascal Lavoie, Thomas Niesenhaus, Till Reek, Linus Perander
|On-Site Speaker (Planned)
Current efficiency and energy efficiency are the two most important metrics for assessing the overall performance of a given potline. The influence of alumina quality on these parameters is however poorly understood although likely influential. This interplay is considered here with the construction of multiple regression models from daily data of test groups of 60 cells each for a number of important parameters, pertinent alumina properties from detailed materials characterization of judiciously chosen aluminas and relevant weather parameters over 20 months of effective sampling. The concentration of α-Al2O3 in the fines is found to be the single most influential parameter affecting current efficiency and energy efficiency. Models of superheat and noise indicate that this is predominantly due to issues associated with alumina solubility. Energy efficiency is also correlated with gibbsite content of the fines, possibly due to the added energy required for the phase transformation from hydroxide to transition alumina.
||Planned: Light Metals Volume