Cooling element, in particular for furnaces, and method for...

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

Patent

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F27D 1/12 (2006.01)

Patent

CA 2511141

The invention relates to a cooling element, particularly for use in walls of furnaces that are subjected to high levels of thermal stress, and to a method for producing a cooling element. The cooling element is comprised of cast copper or of a low-alloyed copper alloy and is provided with coolant channels, which consist of tubes cast inside the copper or the copper alloy and which are placed inside the cooling element. In order to create a cooling element with an improved material bond on the contact surfaces between the cooling tube and the metal cast around it and thus with an increased heat transfer, the invention provides that the tubes of the coolant channels are provided with an electrolytic coating on the exterior thereof. The use of copper tubes has been shown to be particularly advantageous, and the coating of the tube exteriors thereof ensues in an electroplating bath.

L'invention concerne un élément réfrigérant, s'utilisant notamment dans des parois de fours à haute sollicitation thermique, ainsi qu'un procédé permettant de produire un élément réfrigérant. Ledit élément réfrigérant se compose de cuivre coulé ou d'un alliage de cuivre faiblement allié et comporte des canaux pour agent réfrigérant disposés à l'intérieur, à base de tubes coulés dans le cuivre ou dans l'alliage de cuivre. L'invention vise à mettre au point un élément réfrigérant à matériau composite amélioré, aux interfaces entre le tube de refroidissement et le métal coulé autour, et présentant par conséquent une transmission de chaleur augmentée. A cet effet, il est prévu de munir les tubes des canaux d'agent réfrigérant d'un revêtement électrolytique sur leur face extérieure. Il s'est avéré particulièrement avantageux d'utiliser des tubes en cuivre, dont le revêtement des faces extérieures tubulaires s'effectue dans un bain de nickelage galvanique.

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