B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 11/115 (2006.01) B22D 11/01 (2006.01) B22D 11/10 (2006.01)
Patent
CA 2391235
The invention concerns a method which consists in: simultaneously subjecting the meniscus of the molten metal present in the ingot mould to the action of an axial alternating electromagnetic field tending to provide it with a general dome-like shape and to the action of a transverse direct electromagnetic field designed to attenuate the surface agitation of the meniscus. The implementing installation comprises an ingot mould (1) with cooled assembled plates (2, 3 and 4, 5) for casting metal slabs, an alternating current coil (17) enclosing the ingot mould at the meniscus (12) of the molten metal to produce an axial magnetic field, collinear with the casting axis (11), and a direct magnetic field winding passing through the large plates of the ingot mould at the meniscus (12) perpendicular to the casting axis.
Selon ce procédé, on soumet conjointement le ménisque du métal liquide présent dans la lingotière à l'action d'un champ électromagnétique alternatif axial tendant à lui conférer une forme générale en dôme et à l'action d'un champ magnétique continu transversal destiné à calmer l'agitation superficielle du ménisque. L'installation de mise en oeuvre comprend une lingotière (1) à plaques assemblées refroidies (2,3 et 4,5) pour la coulée de brames métalliques, une bobine à courant alternatif (17) entourant la lingotière au niveau de ménisque (12) de métal liquide pour produire un champ magnétique axial, colinéaire à l'axe de coulée (11), et un inducteur à champ magnétique continu traversant les grandes plaques de la lingotière au niveau du ménisque (12) perpendiculairement à l'axe de coulée.
Delannoy Yves
Etay Jacqueline
Galpin Jean-Marie
Gardin Pascal
Garnier Marcel
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
Usinor
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