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    • 3. 发明申请
    • CONTINUOUS CASTING METHOD OF MOLTEN METAL
    • 金属连续铸造方法
    • US20100059197A1
    • 2010-03-11
    • US12516061
    • 2007-12-03
    • Takehiko TohMasahiro TaniKazuhisa TanakaShinichi Fukunaga
    • Takehiko TohMasahiro TaniKazuhisa TanakaShinichi Fukunaga
    • B22D27/02
    • B22D11/115
    • The present invention provides a continuous casting method of molten metal using electromagnetic force to improve the cast slab surface properties and reduce the nonmetallic inclusions and bubbles trapped inside the cast slab. An alternating current is run through an electromagnetic coil 4 arranged around a casting mold 1 so as to surround a casting space 8 to control the meniscus shape to improve the cast slab surface properties, the discharge ports 6 of a submerged entry nozzle 5 are made upward oriented, and the direction of the discharge flow 14 from the discharge ports 6 is made one to above the intersection A of the casting mold short side and meniscus. Due to this, the nonmetallic inclusions and bubbles in the discharge flow are absorbed by the continuous casting mold flux of the meniscus 11 at the part of the meniscus reached. Further, the discharge flow 14 receives electromagnetic force due to the electromagnetic coil 4 whereby the spread of the discharge flow in the cast slab thickness direction is suppressed and the discharge flow 14 does not contact the long side shell 12, so it is possible to keep nonmetallic inclusions and bubbles from being trapped from the discharge flow 14 at the long side shell 12.
    • 本发明提供一种使用电磁力的熔融金属的连续铸造方法,以改善铸坯表面性能并减少非铸造板坯内的非金属夹杂物和气泡。 交流电流穿过围绕铸模1布置的电磁线圈4,以围绕铸造空间8以控制弯月面形状以改善铸坯表面性能,使浸入式喷嘴5的排出口6向上 并且将排出口6的排出流路14的方向设置在铸模短边和弯液面的交点A之上。 由此,排出流中的非金属夹杂物和气泡被半月板部分的弯液面11的连续铸模熔剂吸收。 此外,排出流14受到电磁线圈4的电磁力的影响,能够抑制铸坯厚度方向的排出流的扩散,排出流14不与长边壳12接触,因此能够保持 非金属夹杂物和气泡被从长侧壳12的排出流14捕获。
    • 9. 发明申请
    • Nozzle for Use in Continuous Casting
    • 喷嘴用于连续铸造
    • US20080032882A1
    • 2008-02-07
    • US10592658
    • 2005-03-14
    • Koji OgataSaeko KogaShinichi Fukunaga
    • Koji OgataSaeko KogaShinichi Fukunaga
    • C04B35/06
    • C04B35/6262B22D41/54C04B35/03
    • Disclosed is a continuous casting nozzle having a refractory portion formed to contain a dolomite clinker and arranged to define a surface region adapted to be in contact with molten steel, which is capable of protecting a working surface of the nozzle from alumina build-up due to alumina in molten steel, while improving corrosion resistance, even during long-term continuous casting of molten steel. The refractory portion is prepared by adding a binder to a mixed material and subjecting the obtained mixture to kneading, forming and heat treatment. The mixed material comprises a dolomite clinker which has an average particle size of 0.8 mm or less and a CaO content of 50 mass % or less. The mixed material has a ratio W1/W2 of 0.33 or more, wherein W1 is a content by mass of CaO, and W2 is a content by mass of MgO. The mixed material comprises a dolomite clinker and a magnesia clinker. Alternatively, the mixed material comprises a dolomite clinker and a magnesia clinker. The mixed material has a ratio WD/WM in the range of 0.5 to 15, wherein WD is a mass % of dolomite clinker particles having a particle size of 1 mm or less in a particle size distribution of the dolomite clinker, and WM is a mass % of magnesia clinker particles having a particle size of 1 mm or less in a particle size distribution of the magnesia clinker. Further, the mixed material has a ratio W1/W2 in the range of 0.33 to 3.0, wherein W1 is a content by mass % of a CaO component in the dolomite clinker, and W2 is a content by mass % of an MgO component in the magnesia clinker.
    • 公开了一种连续铸造喷嘴,其具有形成为容纳白云石熟料并且布置成限定适于与钢水接触的表面区域的耐火部分,其能够保护喷嘴的工作表面免于氧化铝堆积,这是由于 氧化铝在钢水中,同时提高耐腐蚀性,即使在钢水的长期连续铸造中也是如此。 通过将粘合剂添加到混合材料中并对所得到的混合物进行捏合,成形和热处理来制备耐火材料部分。 混合材料包括平均粒度为0.8mm以下且CaO含量为50质量%以下的白云石熟料。 混合材料的W 1 / W 2的比率为0.33以上,其中W 1是CaO的质量含量,W 2是MgO的质量含量。 混合材料包括白云石熟料和氧化镁熟料。 或者,混合材料包括白云石熟料和氧化镁熟料。 混合材料的WD / WM比为0.5〜15,其中WD为白云石熟料的粒度分布中粒径为1mm以下的白云石熟料颗粒的质量%,WM为 在氧化镁熟料的粒度分布中,粒径为1mm以下的氧化镁熟料粒子的质量%。 此外,混合材料的比例W 1 / W 2为0.33〜3.0,其中W 1为白云石熟料中的CaO成分的质量%,W 2为质量% MgO组分在氧化镁熟料中。