Recovery method

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C - Chemistry, Metallurgy

22

B

C22B 7/00 (2006.01) B23K 1/00 (2006.01) C22B 3/18 (2006.01) C22B 21/00 (2006.01)

Patent

CA 2368084

A process for separating the clad layer from the core of brazing sheet and which comprises heating the sheet until the clad layer becomes liquid or semi- liquid but the core remains solid, removing the clad layer in its liquid or semi-liquid state and then recovering the same, and wherein the said clad layer is removed by mechanical means which apply a shear force directly to the clad layer. The process enables the economic and efficient recovery for recycling purposes of the core alloy and/or the cladding alloy from brazing sheet scrap.

L'invention concerne un procédé permettant de séparer la couche de revêtement par rapport au coeur d'une feuille de brasage: on chauffe la feuille jusqu'à liquéfier ou semi-liquéfier la couche de revêtement tandis que le coeur reste à l'état solide, puis on retire la couche à l'état liquide ou semi-liquide afin de la récupérer. On utilise à cet effet des moyens mécaniques par application d'une force de cisaillement directement sur la couche. Ce procédé permet une récupération économique et efficace, aux fins de recyclage, de l'alliage du coeur et/ou de l'alliage de revêtement sur des rebuts de feuille de brasage.

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