Effect of the Precise Alumina Feeding on the Anode Effect Quenching Based on the Zone Anode Current in Aluminum Reduction Cells
摘要
The Hall-Héroult aluminum productionAluminum production process can be enhanced by minimizing the anode effect (AEAnode Effect (AE)) occurrences since AEAnode Effect (AE) is detrimental to the process. This study demonstrated that the occurrence of low-voltage anode effectAnode Effect (AE) (LVAE) and its position can be diagnosed effectively according to the change of zone anode currentZone anode current by using the fiber optic current sensorSensors. In the single-zone manual reduced feeding experiments, additional aluminaAlumina was manually fed into the diagnosis zone once its zone anode currentZone anode current continued to drop to a certain threshold, resulting in the successful quenching of LVAE. Subsequently, an automated algorithm was developed and then applied to the single-zone stop feeding experiments. The quenching of LVAE was achieved by feeding the aluminaAlumina automatically into the zone in which the LVAE was present. This method of precise alumina feedingAlumina feeding to LVAE zones automatically can reduce the frequency of anode effectAnode Effect (AE) in electrolysisElectrolysis production processes effectively.