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    • 7. 发明专利
    • Immersion nozzle for continuous casting of molten steel
    • 用于连续铸钢的注射喷嘴
    • JPS5732858A
    • 1982-02-22
    • JP10765680
    • 1980-08-07
    • Akechi Ceramic KkNippon Kokan Kk
    • KITANI FUKUICHITAKAHASHI TATSUTOKONDOU MASANAO
    • C04B35/48B22D11/10B22D41/50C04B35/482C04B35/66
    • C04B35/6303B22D41/505C04B35/482C04B35/66C04B2111/00612C04B2111/00887C04B2235/3217C04B2235/3244C04B2235/3418C04B2235/3826C04B2235/422C04B2235/9676
    • PURPOSE: To prevent the erosion by molten steel and molten mold powder and improve service life by forming the outer side in the lower part of a nozzle body of alumina-graphite type refractories by using a refractory layer of specific composition.
      CONSTITUTION: The lower outside part 20 of a nozzle body 13 consisting of alumina-graphite type refractories in contact with a molten mold powder layer 19 in molten metal 18 is formed into one body with the body 13 by a refractory layer 20 consisting of 10.5W26.5% carbon, by weight, 70.0W86.0% zirconia, 0.5W15.0% one or two kinds of silicon and ferrosilicon, and ≤3% impurities. The top and bottom end part surfaces of the layer 20 are made smoothly continuous along the axial direction of the nozzle body 13. The reason for limiting numerical values lies in that the carbon improves the heat conductivity of the refractories and lowers the coefft. of thermal expansion thereof. The zirconia prevents the erosion by the molten mold powder. The Si and Fe-Si are added to make up the disadvantage of the oxidation of the carbon or its elution into the molten steel.
      COPYRIGHT: (C)1982,JPO&Japio
    • 目的:通过使用具有特定组成的耐火层,通过在氧化铝 - 石墨型耐火材料的喷嘴体的下部形成外侧,防止钢水和熔融模具粉末的侵蚀,提高使用寿命。 构成:由熔融金属18中的熔融模具粉末层19接触的氧化铝 - 石墨型耐火材料构成的喷嘴体13的下部外部部分20通过由10.5体积的耐火层20与主体13形成一体, 26.5%的碳,70.0-86.0%的氧化锆,0.5-15.0%的一种或两种硅和硅铁,以及<= 3%的杂质。 层20的顶端部和底端部表面沿着喷嘴体13的轴向方向平滑地连续。限制数值的原因在于,碳提高了耐火材料的导热性并降低了该系数。 的热膨胀。 氧化锆防止熔融模具粉末的侵蚀。 添加Si和Fe-Si以弥补碳的氧化或其溶入钢水的缺点。