Metal-based anodes for aluminium electrowinning cells

Details Metal-based anodes for aluminium electrowinning cells Metal-based anodes for aluminium electrowinning cells

2005-04-12

2005-04-12

Bell, Bruce F. (Department: 1746)

Chemistry: electrical and wave energy

Apparatus

Electrolytic

C205S384000, C205S385000, C205S387000, C205S394000, C420S459000, C423S150100

Reexamination Certificate

active

06878247

ABSTRACT:
An anode of a cell for the electrowinning of aluminium comprises a nickel-iron alloy substrate having an openly porous nickel metal rich outer portion whose surface is electrochemically active. The outer portion is optionally covered with an external integral nickel-iron oxide containing surface layer which adheres to the nickel metal rich outer portion of the nickel-iron alloy and which in use is pervious to molten electrolyte. During use, the nickel metal rich outer portion contains cavities some or all of which are partly or completely filled with iron and nickel compounds, in particular oxides, fluorides and oxyfluorides.

REFERENCES:
patent: 5510008 (1996-04-01), Sekhar et al.
patent: 5904828 (1999-05-01), Sekhar et al.
patent: 6521115 (2003-02-01), Duruz et al.
patent: 6562224 (2003-05-01), Crottaz et al.

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