Abstract: The present invention relates to a method of improving the current efficiency (CE) in an electrolytic aluminum production cell with an electrolytic bath, at least one anode and at least one cathode, and passing current between said anode and said cathode through said bath and feeding an aluminum containing feedstock to the cell. The CE is improved in that the aluminum containing feedstock is prepared in a manner where it contains substantially no humidity or water before it is fed to the cell, where the electrolytic process is carried out at conditions with reduced amount of hydrogen present.

Abstract: This invention describes a method of producing a metal, M1, in an electrolytic cell consisting of a molten electrolyte, MZY-MZO, at least one anode and at least one cathode, characterised in that the passage of current between said anode(s) and cathode(s) through said electrolyte, produces a metal, M1, from a raw material, M1X, containing a non-metallic species, X, under conditions such that the potential at the cathode causes the reduction of the MZ cation and the formation of MZ at activities less than one, and the potential at the cathode is insufficient to cause formation of MZ metal as a discrete solid or liquid phase, and the MZ so produced reduces the raw material, M1X, at the cathode, to M1.

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

Abstract: The present invention relates to a method of improving the current efficiency (CE) in an electrolytic aluminium production cell with an electrolytic bath, at least one anode and at least one cathode, and passing current between said anode and said cathode through said bath and feeding an aluminium containing feedstock to the cell. The CE is improved in that the aluminium containing feedstock is prepared in a manner where it contains substantially no humidity or water before it is fed to the cell, where the electrolytic process is carried out at conditions with reduced amount of hydrogen present.

Abstract: The present invention relates to a design and a method of utilisation of inert anodes in an electrowinning cell for the production of aluminium, in particular electrowinning of aluminium by the use of traditional Hall-Heroult cell design.