Method and installation for dip coating of a metal strip

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 2/00 (2006.01)

Patent

CA 2428487

The invention concerns a method for continuous dip coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), method which consists in: continuously unwinding the metal strip (1) in a sheath (13) whereof the lower part (13a) is immersed in the liquid metal bath (12) to define with the surface of said bath a fluid seal (14); producing a natural flow of the liquid metal from the surface of the liquid seal into an overflow compartment (25) arranged in said sheath (13) and comprising an inner wall extending the sheath (13) at its lower part and maintaining the level of the liquid metal in said compartment (25) at a level below the surface of the liquid seal (14). The invention also concerns an installation for implementing the method.

L'invention concerne un procédé de revêtement au trempé en continu d'une bande métallique (1) dans une cuve (11) contenant un bain de métal (12) liquide, procédé dans lequel on fait défiler en continu la bande métallique (1) dans une gaine (13) dont la partie inférieure (13a) est immergée dans le bain de métal (12) liquide pour déterminer avec la surface dudit bain un joint d'étanchéité (14). On réalise un écoulement naturel du métal liquide de la surface du joint liquide dans un compartiment de déversement (25) ménagé dans ladite gaine (13) et comportant une paroi interne prolongeant la gaine (13) à sa partie inférieure et on maintient le niveau de métal liquide dans ledit compartiment (25) à un niveau au-dessous de la surface du joint liquide (14). L'invention concerne également une installation pour la mise en oeuvre du procédé.

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