B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 11/10 (2006.01) F27D 27/00 (2010.01) B01F 13/00 (2006.01) B01F 13/08 (2006.01) B22D 1/00 (2006.01) B22D 11/115 (2006.01) B22D 27/02 (2006.01) H05B 6/34 (2006.01) F27D 3/00 (2006.01) F27D 23/04 (2006.01)
Patent
CA 2141799
A method and a device for inductively stirring a molten metal. Magnetic fields are applied to act on the melt through a wall (11) which comprises a magnetic material. Said wall is saturated by a magnetic direct field such that an anisotropically directed magnetic saturation, a low relative permeability, is obtained in the saturation direction (S). A low-frequency magnetic travelling alternating field, comprising components which are located in a plane oriented parallel to said saturation direction and perpendicular to the plane of the watt; is applied superposed on the magnetic direct field, whereby the low-frequency magnetic travelling alternating field passes through said wall with small losses and little damping to apply a stirrer field which provides the desired circulation in the melt.
L'invention concerne un procédé et un dispositif d'agitation inductive d'un métal en fusion. On applique des champs magnétiques destinés à agir sur le bain de fusion à travers une paroi (11) constituée d'un matériau magnétique. Ladite paroi est saturée par un champ magnétique direct de manière à obtenir une saturation magnétique dirigée de manière anisotropique, une perméabilité relativement faible dans la direction de saturation (S). Un champ magnétique progressif basse fréquence alternant comprenant des composants situés dans un plan parallèle à ladite direction de saturation et perpendiculaire au plan de la paroi, est appliqué en superposition avec le champ magnétique direct, le champ magnétique progressif basse fréquence alternant passant dans ladite paroi avec des petites déperditions et un faible amortissement, afin d'induire un champ agitateur et la circulation voulue dans le bain de fusion.
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Asea Brown Boveri Ab
Robic
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