C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
C25C 3/08 (2006.01) C25C 3/12 (2006.01)
Patent
CA 2496533
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.
L'invention concerne un procédé de production électrolytique d'aluminium à partir d'un électrolyte (3) contenant de l'oxyde d'aluminium. L'électrolyse fait intervenir au moins une anode inerte (1) et au moins une cathode (2) contenues dans la cellule à extraction électrolytique. L'anode émet de l'oxygène et la cathode reçoit une décharge d'aluminium au cours de l'électrolyse. L'oxygène suit un circuit d'écoulement d'électrolyte. L'oxygène traverse les rainures de l'anode puis s'écoule de la chambre interpolaire. Ceci permet d'établir un circuit d'écoulement d'électrolyte entre les électrodes (1, 2) et entre les anodes (1) et au-dessus de celles-ci . Par ailleurs, l'invention concerne un ensemble anode et une cellule à extraction électrolytique.
Julsrud Stein
Lorentsen Odd-Arne
Siljan Ole-Jacob
Fetherstonhaugh & Co.
Norsk Hydro Asa
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