UTILISATION OF OXYGEN EVOLVING ANODE FOR HALL-HEROULT CELLS AND DESIGN THEREOF

摘要

The present invention relates to a method for electrolytic production of aluminium metal from an electrolyte (3) comprising aluminium oxide, by performing electrolysis comprising at least one inert anode (1) and at least one cathode (2) thus forming part of an electrowimming cell. The anode evolves oxygen gas and the cathode has aluminium discharged onto it in the electrolysis process, where the said oxygen gas enforces an electrolyte flow pattern. The oxygen gas is directed to flow into anode grooves and drained away from the interpolar room, and thereby establishing an electrolyte flow pattern between the electrodes (1) and (2) and between over the anodes (1). The invention also concerns an anode assembly and an electrowinning cell.