C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
C25B 11/12 (2006.01) C01B 31/00 (2006.01) C04B 35/00 (2006.01) C09C 1/56 (2006.01) C25C 3/12 (2006.01) H01B 1/06 (2006.01)
Patent
CA 2570101
The present invention provides a method of making a carbon electrode, suitable for use as an anode in an aluminum reduction cell, which comprises mixing an aggregate, comprising a mixture of particulate shot coke, and a particulate carbonaceous material other than shot coke with coal tar pitch or petroleum pitch or a combination of these pitches at an elevated temperature to form a paste wherein said aggregate comprises a combination of coarse, medium, and fine particles and said particulate shot coke may comprise a majority of said fine particles, and said paste comprises from about 80 to about 90%, by weight, of said aggregate and from about 10 to about 20%, by weight, of said pitch; forming said paste into a solid body; and baking said solid body at an elevated temperature to form said carbon electrode.
La présente invention concerne un procédé pour fabriquer une électrode de carbone destinée à s'utiliser en tant qu'anode dans une cellule de réduction d'aluminium; il consiste à mélanger un agrégat qui comprend un mélange de coke particulaire non compacté et un matériau particulaire carboné autre que le coke non compacté, avec du brai de houille ou de pétrole ou d'une combinaison de ces brais à une température élevée pour former une pâte, ledit agrégat comprenant une combinaison de particules grossières, moyennes et fines, ledit coke particulaire non compacté pouvant comprendre une majorité desdites particules fines. La pâte comprend entre environ 80 et environ 90 %, en poids, dudit agrégat, et entre environ 10 et environ 20 %, en poids, dudit brai. Selon le procédé, on forme ladite pâte en un corps solide, et l'on cuit ce corps solide à une température élevée pour former ladite électrode de carbone.
Edwards Leslie C.
Love Richard O.
Morgan William Rogers Jr.
Ross J. Anthony
Vogt M. Franz
Century Aluminum Company
Cii Carbon Llc
Gowling Lafleur Henderson Llp
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