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    REFRACTORY MATERIAL AND CASTING NOZZLE
    1.
    发明申请
    REFRACTORY MATERIAL AND CASTING NOZZLE 有权
    耐火材料和铸造喷嘴

    公开(公告)号：US20160297003A1

    公开(公告)日：2016-10-13

    申请号：US14777909

    申请日：2014-03-19

    申请人： KROSAKIHARIMA CORPORATION

    发明人： Katsumi MORIKAWA ,  Akinari SASAKI ,  Taro MAKINO ,  Ling LI

    IPC分类号： B22D41/54 ,  C04B35/01 ,  C04B35/043

    CPC分类号： B22D41/54 ,  C04B35/013 ,  C04B35/043 ,  C04B35/0435 ,  C04B35/106 ,  C04B35/482 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3232 ,  C04B2235/3244 ,  C04B2235/34 ,  C04B2235/3409 ,  C04B2235/3418 ,  C04B2235/3821 ,  C04B2235/3826 ,  C04B2235/401 ,  C04B2235/402 ,  C04B2235/422 ,  C04B2235/425 ,  C04B2235/428 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/5472 ,  C04B2235/72 ,  C04B2235/9607

    摘要： Provided is a refractory material having both excellent erosion/corrosion resistance and thermal shock resistance, which has hardly been obtainable by conventional techniques, and a casting nozzle using the refractory material. The refractory material of the present invention contains: MgO in an amount of 40 mass % or more; a free carbon component in an amount of 4 to 30 mass %; and one or more selected from the group consisting of B2O3, P2O5, SiO2 and TiO2, in a total amount of 0.3 to 3 mass %, with the remainder being at least one other type of additional refractory component, wherein a void layer exists in an interface between a carbon-containing matrix microstructure residing at least on opposite sides of a maximum-size one of a plurality of MgO-containing particles in the refractory material, and the maximum-size MgO-containing particle, wherein a sum of respective thicknesses of the void layer at two positions on the opposite sides is 0.2 to 3.0% in terms of a ratio with respect to a particle size of the maximum-size MgO-containing particle, and wherein an inorganic compound comprised of MgO and the one or more selected from the group consisting of B2O3, P2O5, SiO2 and TiO2 exists in an entirety or a part of a surface of each of the plurality of MgO-containing particles.

    摘要翻译： 本发明提供耐腐蚀性，耐热冲击性优异的耐火材料，通过现有技术难以获得的耐火材料，以及使用该耐火材料的铸造用喷嘴。 本发明的耐火材料含有：40质量％以上的MgO， 4质量％以上的游离碳成分; 和选自B 2 O 3，P 2 O 5，SiO 2和TiO 2的一种或多种，​​总量为0.3〜3质量％，其余为至少一种其它类型的附加难熔成分，其中空隙层存在于 位于至少位于耐火材料中的多个含MgO颗粒中的最大尺寸的一个的相对侧上的含碳基体微结构和最大尺寸的含MgO颗粒之间的界面，其中， 在相对侧的两个位置的空隙层的比例相对于最大尺寸的含MgO颗粒的粒径的比率为0.2〜3.0％，其中由MgO组成的无机化合物和选自 从由B 2 O 3，P 2 O 5，SiO 2和TiO 2组成的组中，存在于多个含MgO颗粒中的每一个的整个或部分表面。

    REFRACTORY PRODUCT
    2.
    发明申请
    REFRACTORY PRODUCT 有权

    公开(公告)号：US20230028785A1

    公开(公告)日：2023-01-26

    申请号：US17780392

    申请日：2020-12-08

    申请人： KROSAKIHARIMA CORPORATION

    发明人： Kouhei TAKAMI ,  Katsumi MORIKAWA ,  Shigefumi MATSUMOTO

    IPC分类号： B22D41/54 ,  C04B35/106 ,  C04B38/00

    摘要： Provided is a refractory product which is not impregnated with pitch or the like, wherein it has higher corrosion-erosion resistance and thermal shock resistance as compared to a refractory product subjected to pitch or the like-impregnation treatment. The refractory product which is not impregnated with tar or pitch is characterized in that, in terms of values of physical properties of a sample of the refractory product as measured after heat-treating the sample in a non-oxidizing atmosphere at 1200° C.: an apparent porosity is 7% or less; a total void volume of pores having a pore diameter of 1 μm or less is 80% or more of an integrated void volume of pores of the entire sample of the refractory product; and a gas permeability is 50×10−17 m2 or less.