|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Aluminum Reduction Technology
||Study of Impact of the Anode Slots on the Voltage Fluctuations of Aluminium Electrolysis Cell Using Bubble Layer Simulator
||Sandor Poncsak, László Istvan Kiss, Sébastien Guérard, Jean François Bilodeau
|On-Site Speaker (Planned)
There is a constant effort from the aluminium producers to reduce energy consumption of the Hall-Héroult cells in order to decrease cost and environmental fingerprint. Among others, slotted anodes were introduced in order to promote faster evacuation of the electrically isolating anode gas bubbles and thus diminish their contribution to the total cell voltage. A bubble layer simulator was developed to reproduce cell voltage fluctuations, caused by the dynamics of anode bubbles. Results show that the slots cut in the right position and direction can reduce both the amplitude of fluctuations and the average cell voltage. This impact is even higher for new, almost horizontal flat anode bottom. It is also revealed that the slots are not only acting as bubble sink, but they contribute to the acceleration of the bubble layer and thus their role in the momentum exchange between liquid and gas must be taken into account.
||Planned: Light Metals