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Published in:
2016 | OriginalPaper | Chapter
Statistical Evaluation and Modeling of the Link between Anode Effects and Bath Height, and Implications for the ALPSYS Pot Control System
Authors : Sylvain Fardeau, Arthur Martel, Pierre Marcellin, Patrick Richard
Published in: Light Metals 2014
Publisher: Springer International Publishing
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While anode effect benchmarks show that the near zero anode effect target is achievable using up-to-date process control logic, increasing constraints ranging from far lower ACD, power modulation to operational disturbances have led to a recent surge of PFC emissions in modern smelters pushing their technology towards the limits.After achieving a significant reduction in anode effect rate and increased current efficiency by introducing the new auto-adaptive alumina control logic presented in 2010, the ALPSYS R&D team has identified bath management as a priority to further improving control robustness.This paper recalls the main factors affecting bath height and the direct link between bath height and anode effects. It then shows the results of improved bath height management and the implications for process control procedures such as alumina control, instability treatment and power modulation.