CONTINUOUS CASTING METHOD AND DEVICE OF BLOOM

摘要

PROBLEM TO BE SOLVED: To provide a continuous casting method and device that can reduce the occurrence of depletion of cast pieces when forming a swirl flow in the mold by electromagnetic stirring in the mold in the bloom continuous casting.SOLUTION: A continuous casting method and device of a bloom is characterized as follows: a mold cross-sectional shape 3 of a mold lower end 12 has a corner R5 with a radius Rof 10 mm or more and has a parallel part 7 of 0.5 times or more of a cast piece width on a portion serving as upper and lower surfaces 14, concerning an opening part 2 for receiving a molten metal of a continuous casting mold 1; a mold cross-sectional shape 3 of a mold upper part meniscus part 11 has a corner R5 with a radius Rof 30 mm or more and has a curved part 6 with a mold wall curved toward a mold outward; a distance between opposed mold walls is increased in a range of 10 mm or more and 60 mm or less in comparison with a mold lower end Tin the maximum value Tof the meniscus part; and an electromagnetic stirring device capable of generating a swirl flow in the horizontal plane in the molten metal in the mold is provided.