Anode Signal Analysis — The Next Generation in Reduction Cell Control
Reduction cells have achieved excellent control capability over the past 20 years by improved acquisition and treatment of the cell resistance signal, which provides the basis for regulation of alumina feeding, thermal balance and cell stability. As cells become larger in size however, there is an increasing need for control sensors that can recognize and react to spatial variation in the cell both in terms of anode performance and alumina feed control. Monitoring of individual anode current signals can provide the ‘next generation’ control capability that will be necessary to ensure that very large cells can deliver the same process efficiencies as their smaller predecessors. Coincidently, anode signals can now be acquired, stored and processed with far greater convenience and lower cost than was possible in the past, making an enhanced control capability within practical reach.
KeywordsAnode current signals reduction cell control
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