Electrolysis: processes – compositions used therein – and methods – Electrolytic synthesis – Utilizing fused bath
Reexamination Certificate
2001-02-23
2003-05-06
Valentine, Donald R. (Department: 1742)
Electrolysis: processes, compositions used therein, and methods
Electrolytic synthesis
Utilizing fused bath
C205S396000
Reexamination Certificate
active
06558526
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to electrolytic aluminum production cells, and more particularly relates to a method of converting conventional cells containing consumable anodes to cells containing inert anodes.
BACKGROUND INFORMATION
Existing aluminum smelting cells use consumable carbon anodes which produce CO
2
and other gaseous by-products and must be frequently replaced. Inert or non-consumable anodes may eliminate these concerns, but the implementation of inert anodes provides other challenges such as controlling the heat balance of the cell. Furthermore, there are thousands of existing conventional cells, which would be cost-prohibitive to replace entirely. An effective procedure is therefore needed to convert conventional Hall-Heroult cells to inert anode cells for aluminum production.
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D'Astolfo, Jr. LeRoy E.
Moore Robert C.
Alcoa Inc.
Levine Edward L.
Towner Alan G.
Valentine Donald R.
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