Electromagnetic device for laterally containing liquid metal in a casting of metal products

An electromagnetic device for laterally containing liquid aluminum or a liquid aluminum alloy, having a first electrical conductivity, at one open side end of a passage defined between two counter-rotating casting rolls, said device comprising

• a magnetic yoke made of a first material having a second electrical conductivity either lower than or equal to said first electrical conductivity, said first material being ferromagnetic material and said magnetic yoke ending with two mutually proximal wedge-shaped ends, said wedge-shaped ends having respective inner surfaces, which are flat and substantially parallel to each other and face each other defining a gap, and respective outer surfaces, arranged one on one side and the other on the other side with respect to a plane lying in said gap, said outer surfaces of the two wedge-shaped ends being converging towards said plane so as to define a wedge shape whereby both said wedge-shaped ends can be inserted at least partially between the two casting rolls;
• at least one coil wound on at least one stretch of the magnetic yoke and adapted to be supplied by electric current;
• at least one plate inserted in said gap;
• wherein said at least one plate is made of a second material having a third electrical conductivity either greater than or equal to said first electrical conductivity, whereby said at least one plate can electromagnetically shield said inner surfaces with respect to each other;
• wherein said at least one plate comprises a flat part arranged between the flat and substantially parallel inner surfaces of the wedge-shaped ends.