Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Utilizing fused bath
Reexamination Certificate
2003-08-15
2008-12-30
Bell, Bruce F (Department: 1795)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Utilizing fused bath
C205S391000, C205S375000, C205S385000, C205S387000, C204S243100, C204S247300
Reexamination Certificate
active
07470354
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.
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Metallurgical and Materials Transactions B, vol. 25B, Jun. 1994, R. Shekhar et al., “Physical Modeling Studies of Electrolyte Flow Due to Gas Evolution and Some Aspects of Bubble Behavior in Advanced Hall Cells: Part II. Flow and Interpolar Resistance in Cells with a Grooved Anode”, pp. 341-349.
Julsrud Stein
Lorentsen Odd-Arne
Siljan Ole-Jacob
Bell Bruce F
Norsk Hydro ASA
Wenderoth , Lind & Ponack, L.L.P.
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