Electromagnetic Device For Laterally Containing Liquid Metal In A Casting Of Metal Products

Abstract: An electromagnetic device (20) for laterally containing a liquid metal, having a first electrical conductivity, at one open side end of a passage defined between two counter-rotating casting rolls, at least the surfaces of which are made of a ferromagnetic material, said device comprising a magnetic yoke (1) made of a further ferromagnetic material having a second electrical conductivity either lower than or equal to said first electrical conductivity of the liquid metal and ending with two mutually proximal wedge-shaped ends (4, 4'), said wedge-shaped ends having respective inner surfaces (5, 5'), facing each other and defining a gap (6), and respective outer surfaces (7, 7'), arranged one on one side and the other on the other side with respect to a plane lying in said gap and shaped so as to be able to insert both said wedge-shaped ends (4, 4') at least partially between the two casting rolls; at least one coil (8) wound on at least one stretch of the magnetic yoke (1) and adapted to be supplied by electric current; at least one plate (9), made of a material having a third electrical conductivity either greater than or equal to said first electrical conductivity, said at least one plate (9) being inserted in said gap (6) so as to shield said inner surfaces (5, 5') with respect to each other.

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