| 摘要 |
PURPOSE:To produce a cast slab having no inclusion and no pin hole by arranging plural pieces of electromagnetic coil to vertical direction at symmetrical position to right and left direction to a molten steel supplying nozzle at outside of long side in a mold and giving the optimum magnetic field to the molten steel in the mold in every casting conditions. CONSTITUTION:The electromagnetic coils are symmetrically arranged at the left side (3a, 3b, 3c) and the right side (3d, 3e, 3f) to the molten steel supplying nozzle 1 and the outsides of the other long sides by the same pieces as the above. The electromagnetic coils are set to vertical direction and below the meniscus part M. At the time of applying DC current to the electromagnetic coil, the magnetic field having the desired magnetic field intensity and orientation can be generated and the molten steel flow discharged from the molten steel supplying nozzle 1 can be freely controlled. By this method, even in the case the mold width, steel kind, casting speed, etc., varies, as the molten steel flow can be freely controlled, the cast slab having from narrow width to wide width can be cast with the same molten steel supplying nozzle. |
