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US 2009/0013823 A1Published application
Use of alumina-carbon agglomerates in the carbothermic production of aluminum
AssigneeAlcoa Inc.
InventorsRichard J. Fruehan, David J. Roha, Anders Schei, Mark L. Weaver
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Abstract
An agglomerate comprising alumina, carbon, and a binder for use in a vapor recovery reactor of a carbothermic alumina reduction furnace is disclosed. A method for using alumina-carbon agglomerates to capture aluminum vapor species and utilize waste heat from off-gases in a vapor recovery reactor to form a recyclable material is also disclosed.
Claims31
An agglomerate for feeding into a vapor recovery reactor of an aluminum carbothermic production system, the agglomerate comprising:
- an alumina source;
- a carbon source;
- and
- an organic binder
- wherein the organic binder comprises less than about 10 weight % of the pellet.
2 more elements
A method for recovering off-gases from a carbothermic aluminum furnace, the method comprising:
- passing, in a vapor recovery reactor, a feedstock countercurrent to off-gases from a carbothermic aluminum furnace, the feedstock comprising an alumina-carbon agglomerate;
- treating, concomitant to the passing step, the off-gases with the feedstock;
- and
- recovering at least some recyclable material for re-use in the carbothermic aluminum furnace.
1 more element
Dependencies are inferred from the claim text.