Stable anodes including iron oxide and use of such anodes in metal production cells
AssigneeAlcoa Inc.
InventorsRobert DiMilia, Xinghua Liu, Douglas Weirauch
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Abstract
Stable anodes comprising iron oxide useful for the electrolytic production of metal such as aluminum are disclosed. The iron oxide may comprise Fe3O4, Fe2O3, FeO or a combination thereof. During the electrolytic aluminum production process, the anodes remain stable at a controlled bath temperature of the aluminum production cell and current density through the anodes is controlled. The iron oxide-containing anodes may be used to produce commercial purity aluminum.
Claims29
A method of producing aluminum comprising:
- passing current between a stable anode comprising iron oxide and a cathode through a bath comprising an electrolyte and aluminum oxide;
- maintaining the bath at a controlled temperature;
- controlling current density through the anode;
- and
- recovering aluminum from the bath.
A stable anode comprising iron oxide for use in an electrolytic metal production cell.
An electrolytic aluminum production cell comprising:
- a molten salt bath comprising an electrolyte and aluminum oxide maintained at a controlled temperature;
- a cathode;
- and
- a stable anode comprising iron oxide.
Dependencies are inferred from the claim text.