Cathodes for alumina reduction cells

Chemistry: electrical and wave energy – Apparatus – Electrolytic

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

204294, 204291, 428367, 428408, 428688, 427113, 428697, C25C 308, B32B 904, B05D 512

Patent

active

043338135

ABSTRACT:
This invention concerns cathodes for alumina reduction cells, particularly drained cathodes, which present a refractory surface for contacting molten aluminum on the cell floor. This invention also concerns materials for constructing such cathodes.
The cathodes described comprise a carbonaceous bed, preferably a graphite bed, and a composite tile. This tile is characterized by a layer of a refractory hard metal (RHM) material bonded to a base layer of a graphitic material, where the RHM layer comprises a hot pressed mixture of titanium diboride and aluminum nitride powders. The tile is further characterized by the bond between the RHM layer and the graphitic base layer, such bond having been produced simultaneously as the RHM layer is formed by hot pressing the mixture of titanium diboride and aluminum nitride powders directly against the graphitic base layer. The graphitic base layer is in turn bonded to the carbonaceous bed by means of a carbonaceous cement, and the RHM layer thereby provides a refractory surface for contacting molten aluminum.

REFERENCES:
patent: 2636856 (1953-04-01), Suggs et al.
patent: 3143413 (1964-08-01), Krapf
patent: 3251700 (1966-05-01), Mandorf, Jr.
patent: 3328280 (1967-06-01), Richards et al.
patent: 3340077 (1967-09-01), Alper et al.
patent: 3400061 (1968-09-01), Lewis et al.
patent: 3408312 (1968-10-01), Richards et al.
patent: 3546769 (1970-12-01), Schwope et al.
patent: 3661736 (1972-05-01), Holliday
patent: 3729794 (1973-05-01), Douglass
patent: 3736159 (1973-05-01), Gibson et al.
patent: 3856650 (1974-12-01), Kugler et al.
patent: 3888661 (1975-06-01), Levitt et al.
patent: 3937619 (1976-02-01), Clougherty
patent: 4071420 (1978-01-01), Foster, Jr. et al.
patent: 4083719 (1978-04-01), Arakawa et al.
patent: 4093524 (1978-06-01), Payne
patent: 4181583 (1980-01-01), Steiger et al.
patent: 4219391 (1980-08-01), Foster, Jr.
patent: 4224128 (1980-09-01), Walton
patent: 4231853 (1980-11-01), Rahn
patent: 4265727 (1981-05-01), Beckley
patent: 4285796 (1981-08-01), Stoner et al.
G. Gerard, Extractive Metallurgy of Aluminum, vol. 2, "Aluminum", Interscience Publishers, 1963, pp. 461-483.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Cathodes for alumina reduction cells does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Cathodes for alumina reduction cells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathodes for alumina reduction cells will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-552116

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.