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    • 22. 发明专利
    • Method and apparatus for continuously casting steel
    • 连续铸钢的方法和装置
    • JP2009066619A
    • 2009-04-02
    • JP2007237608
    • 2007-09-13
    • Nippon Steel Corp新日本製鐵株式会社
    • FUJI TAKEHIKOGOTO OSAMUHAYAKAWA MASANOBUSATO TAKAHIROWAKAO MASAMITSUKUSUNOKI SHINTARO
    • B22D11/18B22D11/04B22D11/10B22D11/103B22D11/11B22D11/115B22D11/16
    • PROBLEM TO BE SOLVED: To improve the quality of a cast slab in continuous casting of steel by suppressing the variation of the quality of the cast slab by suppressing the generation of vortexes in the molten steel in the immersed nozzle.
      SOLUTION: A static magnetic field 20 having the magnetic flux density B
      B
      2 satisfying the following expression, B
      B
      2 ≥C
      0 Q/A, is applied, by an electromagnetic braking device 10, to the molten steel 4 in the immersed nozzle 3 existing at the same level as that of the discharge port 6 of the immersed nozzle 3, where B
      B shows magnetic flux density (T) in the static magnetic field 20; C
      0 shows a constant; Q shows a mass flow (kg/s) of the molten steel 4, and A shows the inside cross sectional area (m
      2 ) of the immersed nozzle 3. The electromagnetic braking force is formed by the applied static magnetic field 20 so as to oppose to the drift current 21 of the molten steel 4 to flow in the immersed nozzle 3 in the neighborhood of the discharge port 6 in the immersed nozzle 3, and the drift current 21 is straightened.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:通过抑制浸入喷嘴中的钢水中的涡流的产生,通过抑制铸坯质量的变化来提高钢的连续铸造中的铸坯的质量。 解决方案:具有满足以下表达式的磁通密度B 2 的静磁场20,B 2 通过电磁制动装置10将≥C 0 Q / A施加到与排出口6的水平相同的浸入喷嘴3中的钢水4 其中B B 表示静磁场20中的磁通密度(T); C 0 表示常数; Q表示钢水4的质量流量(kg / s),A表示浸渍喷嘴3的内部横截面积(m 2 )。电磁制动力通过施加 静电磁场20与钢水4的漂移电流21相对,在浸入喷嘴3内的排出口6附近在浸入喷嘴3内流动,漂移电流21变直。 版权所有(C)2009,JPO&INPIT
    • 25. 发明专利
    • Method for casting molten alloy
    • 铸造合金的方法
    • JP2007111761A
    • 2007-05-10
    • JP2005307499
    • 2005-10-21
    • Hitachi Metals Ltd日立金属株式会社
    • ISHIMOTO YASUSHIMISHIMA SETSUOAIKAWA TAKANORI
    • B22D11/103B22D11/18
    • PROBLEM TO BE SOLVED: To provide a new method for casting molten alloy with which the prevention of segregation in a solidified steel block and the fineness of structure are achieved and the surface of the steel block can be improved.
      SOLUTION: In the method for casting the molten alloy, with which the molten alloy is poured from a tundish for holding the molten alloy through slag into a solidifying space surrounded with a water-cooling mold walls at ≤0.3m/min pouring speed in a laminated solidified speed and solidified while forming molten metal pool and also, the cast block is drawn out in the vertical direction from the lower part of a mold according to the pouring speed of the molten alloy; this casting method is performed, with which the supply of the molten alloy from the above tundish is performed by using one or a plurality of nozzles and the casting is performed while shifting the supplying position onto the upper surface of the slag.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:提供一种铸造熔融合金的新方法,其中防止凝固钢块中的偏析和结构细度,并且可以提高钢块的表面。 解决方案:在铸造熔融合金的方法中,将熔融合金从用于将熔融合金保持熔渣的中间包浇注到用水冷却模具壁围绕的固化空间中,以≤0.3m/ min浇铸 速度为叠层凝固速度,同时形成熔融金属池,并且根据熔融合金的浇注速度,铸模从模具的下部沿垂直方向拉出; 执行这种铸造方法,通过使用一个或多个喷嘴来进行来自上述中间包的熔融合金的供给,并且在将供给位置转移到炉渣的上表面的同时进行铸造。 版权所有(C)2007,JPO&INPIT