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Publication numberUST993002 I4
Publication typeGrant
Application numberUS 06/043,242
Publication dateApr 1, 1980
Filing dateMay 29, 1979
Priority dateMay 29, 1979
Publication number043242, 06043242, US T993002 I4, US T993002I4, US-I4-T993002, UST993002 I4, UST993002I4
InventorsHoward I. Kaplan, Jerry H. Bryce, Thomas J. Johnston, Jan M. Pottinger, Curtis J. McMinn, Alton T. Tabereaux, John T. Willett, Nolan E. Richards
Original AssigneeReynolds Metals Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Refractory surfaces for alumina reduction cell cathodes and methods for providing such surfaces
US T993002 I4
The disclosure pertains to alumina reduction cells which employ refractory materials to provide a molten-aluminum contacting surface for the cathode. Specifically, configurations and methods are described according to which refractory hard metal tiles are secured to a carbonaceous substrate to produce composites suitable for constructing a molten-aluminum contacting surface for the use stated. The tiles are wettable by molten aluminum and are inert chemically to the reduction cell electrolyte. Configurations for coupling and interlocking such tiles are also described. When the tiles are coupled or interlocked in the manner taught, it is possible to achieve a built-up refractory surface which remains chemically and mechanically stable in a reduction cell environment. The refractory hard metal materials used are included among the borides, nitrides and carbides of Group IV, V, and VI of the Periodic System, particularly compounds of titanium and zirconium, and especially titanium-diboride and titanium-diboride aluminum-nitride mixtures.
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4439382Jul 27, 1981Mar 27, 1984Great Lakes Carbon CorporationTitanium diboride-graphite composites
EP0095854A2 *May 17, 1983Dec 7, 1983Alcan International LimitedImprovements in electrolytic reduction cells for aluminium production
EP0095854A3 *May 17, 1983Apr 25, 1984Alcan International LimitedImprovements in electrolytic reduction cells for aluminium production
U.S. Classification204/247.3, 266/283
International ClassificationC25C3/08
Cooperative ClassificationC25C3/08
European ClassificationC25C3/08