The Bubble Laden Layer around Inert Anodes

摘要

In the first part of this paper, the bubble driven flow in an inert metallic oxygen-evolving anode cell is modeled using a eulerian-eulerian approach. The model represents a quarter of a 25 kA cell composed of 8 anodes. The presence of a layer of solidified electrolyte at the free surface of the bath is taken into account. The results show a complex flow pattern with certain symmetry. The maximal velocity of the cryolite is around 15 cm/s. In the second part, the influence of the anode design on the covering factor is studied. The results show that the average value of the covering of inert anodes does not exceed 22 -30% and it slightly depends on the shape of the metallic rod.