Method and device for coating a metal bar by hot dipping

Details Method and device for coating a metal bar by hot dipping Method and device for coating a metal bar by hot dipping

C - Chemistry, Metallurgy

23

C

C23C 2/00 (2006.01) C23C 2/24 (2006.01) C23C 2/40 (2006.01)

Patent

CA 2521299

The invention relates to a method for coating a metal bar (1), in particular a steel strap by hot dipping consisting in vertically passing the metal bar (1) through a container (2) containing a molten coating metal (3) and through a guiding channel (4) which is connected in series and has a predefined height (H). In order to retain the coating metal (2) in the container (3), an electromagnetic field is produced at the level of said guiding channel (4) by means of at least two inductors (5) which are arranged on two sides of the metal bar (1). In order to calm the coating bath, a predefined volume flow (Q) of the coating metal (2) is directed towards the guiding channel (4) at the level of the vertical extension (H) thereof. The inventive device for coating a metal bar by hot dipping is also disclosed.

L'invention concerne un procédé de revêtement d'une barre de métal (1), notamment d'une bande d'acier, par immersion à chaud, consistant à faire passer verticalement la barre de métal (1) au travers d'un réservoir (3) contenant le métal de revêtement fondu (2), et au travers d'un canal de guidage (4) monté en amont, de hauteur définie (H). Pour retenir le métal de revêtement (2) dans le réservoir (3), un champ électromagnétique est créé au niveau du canal de guidage (4) au moyen d'au moins deux inducteurs (5) disposés des deux côtés de la barre de métal (1). Pour tranquilliser le bain de revêtement, un flux volumique prédéfini (Q) de métal de revêtement (2) est acheminé vers le canal de guidage (4) au niveau de son extension verticale (H). L'invention concerne également un dispositif de revêtement d'une barre de métal par immersion à chaud.

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