| 摘要 |
PURPOSE:To surely prevent entrapping phenomenon of non-metallic inclusion and to stably and continuously cast a cast slab having good quality by pouring molten steel in center part of static magnetic field in a mold of continuous casting machine and immediately controlling flow of the molten steel by the static magnetic field, to reduce the flowing speed. CONSTITUTION:In the continuous casting apparatus, one pair of first static magnetic poles 3 are arranged almost at the center part of wide width side face of upper part of the mold 1 for the continuous casting machine. The center line linking the centers C of the magnetic poles almost coincides with the discharging hole 8 of a submerged nozzle 7 for pouring the molten steel. The max. magnetic flux density of the above static magnetic pole 3 is to be >=about 1000G and desirably >=1700G under condition of about 1-4 ton/min practically pouring speed of the molten steel. By this method, the molten steel 5 poured in the mold 1 is smoothly flowed immediately by reducing flow speed without development of turbulent flow at the high magnetic flux density part 9. Speed of this flow is further reduced at the equal density line 11 to become uniform dispersing molten steel flow 12. By this method, the entrapment of generated non-metallic inclusion is prevented by the high speed molten steel flow as showing by the broken line arrow, and held to the top part of the meniscus part in the mold 1.
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