| 摘要 |
PURPOSE:To reduce the surface flaw generation rate of a slab by arranging in opposition a permanent magnet or electromagnet by making the magnetic flux direction in the thickness direction of a slab at two places in specified range from the upper end of a short side face mold. CONSTITUTION:A permanent magnet or an electromagnetic 23 is arranged at the positions of two places in the range of 50-300mm and that of 500-650mm from the upper end of relatively opposing short side molds 1. In this case, the magnetic flux direction of the magnet 23 is made to direct the thickness direction of a slab. The magnetic flux direction of the magnet 23 is thus faced in the slab thickness direction respectively at the upper side and lower side of the collision point of the discharging flow of a continuous casting and the short side mold 1, the movement energy of a upward reverse flow 11 is attenuated and the wave motion of a molten metal level is restrained. A downward invasion flow 12 is reduced at its depth by receiving a brake force and the floating of an inclusion is facilitated. Consequently the generation rate of the surface flaw of a slab is reduced because the molten metal level wave motion is restrained and the inclusion is reduced. |
