Abstract
Impurities found in metal are a major concern for the aluminum industry as some of these may contribute to a decrease of current efficiency or impact metal quality. In the present work, the effect of process parameters on phosphorous and other impurities present in pot metal was investigated using statistical analysis. Factors responsible for the increase of phosphorous in the metal and operational parameters to maximize current efficiency were studied. In addition, sudden changes in phosphorous content in pot metal were investigated, and a mechanism is proposed to account for observed phosphorous and process changes.
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