A furnace and a method for cooling a furnace

F - Mech Eng,Light,Heat,Weapons – 27 – D

Patent

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Details

F27D 1/00 (2006.01) C21B 7/06 (2006.01) F27B 1/14 (2006.01) F27B 1/24 (2006.01) F27D 1/04 (2006.01) F27D 1/06 (2006.01) F27D 1/12 (2006.01)

Patent

CA 2743152

A furnace for conducting a high temperature process under oxidising conditions comprises an outer shell made from a metal, one or more cooling channels formed on or joined to the outer shell and a furnace lining. The furnace lining comprises a backing lining comprising a relatively high thermal conductivity layer positioned adjacent to an inner wall of the outer shell and a working lining positioned inwardly of the layer of relatively high thermal conductivity. The backing lining can comprise a graphite lining or a graphite-containing lining. The rate of heat transfer through the backing lining is sufficiently high to form a protective freeze on the backing lining in the event that the working lining wears away.

L'invention porte sur un four pour la mise en uvre d'un procédé à haute température dans des conditions d'oxydation comprenant une enveloppe extérieure constituée d'un métal, un ou plusieurs canaux de refroidissement formés sur l'enveloppe extérieure ou reliés à celle-ci et un revêtement de four. Le revêtement de four comprend un revêtement support comprenant une couche de conductivité thermique relativement élevée placée à proximité d'une paroi interne de l'enveloppe extérieure et un revêtement d'usure placé à l'intérieur de la couche de conductivité thermique relativement élevée. Le revêtement support peut comprendre un revêtement en graphite ou un revêtement contenant du graphite. La vitesse du transfert de chaleur à travers le revêtement support est suffisamment élevée pour former un produit figé protecteur sur le revêtement support dans le cas où le revêtement d'usure s'use.

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