Process for producing a cast metal strip, and two-roll...

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 11/06 (2006.01) B22D 11/106 (2006.01) B22D 43/00 (2006.01)

Patent

CA 2526089

The invention relates to a method for producing a cast metal strip using a twin roll casting installation. Said casting installation comprises two casting rolls and two lateral plates that together define a molten metal chamber and a casting gap. Molten metal is introduced in to the molten metal chamber and forms in said molten metal chamber a molten metal bath with a bath surface that is open to the top. A cast metal strip is conveyed from the molten metal chamber and through the casting gap. A delimiting surface area (30) for collecting particles that are foreign to the molten metal is produced on the surface of the bath under the effect of at least one gas jet (20, 20a, 20b). The aim of the invention is to substantially avoid the introduction of particles that are foreign to the molten metal into the surface or into the near-surface zone of the cast strip. For this purpose, the at least one gas jet (20, 20a, 20b) is directed together with the casting roll (1, 2) onto the bath surface at a distance of the gas jet axis (21) to the contact line (10, 11) of the bath surface (8).

L'invention concerne un procédé de fabrication d'une bande métallique coulée au moyen d'un dispositif de coulée à deux cylindres. Ledit dispositif est composé de deux cylindres de coulée et de deux plaques latérales formant ensemble une zone de fonte et un espace de coulée. De la fonte métallique est introduite dans la zone de fonte et forme un bain de fonte dans la zone de fonte, présentant une surface de bain ouverte vers le haut, et une bande métallique coulée est extraite de la zone de fonte par l'intermédiaire de l'espace de fonte. Au moins un jet gazeux (20, 20a, 20b) est appliqué sur la surface du bain, et une zone de surface délimitée destinée à recueillir des particules étrangères à la fonte est formée. Pour éviter l'introduction de particules étrangères à la fonte dans la surface ou dans la zone proche de la surface de la bande coulée, le ou les jets gazeux (20, 20a, 20b) sont dirigés sur la surface du bain de telle manière que l'axe du jet gazeux (21) soit espacé par rapport à la ligne de contact (10, 11) entre la surface du bain (8) et le cylindre de coulée (1, 2).

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