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    MAGNESIA CARBON BRICK AND PRODUCTION METHOD THEREFOR
    1.
    发明公开
    MAGNESIA CARBON BRICK AND PRODUCTION METHOD THEREFOR 审中-公开

    公开(公告)号：EP3533774A1

    公开(公告)日：2019-09-04

    申请号：EP17864612.1

    申请日：2017-10-16

    申请人： Krosakiharima Corporation ,  Nippon Steel Corporation

    发明人： TOMITA, Yuya ,  TANAKA, Masato ,  SAWAI, Shigeto

    IPC分类号： C04B35/043 ,  F27D1/00

    摘要： Provided are a magnesia carbon brick which does not include graphite yet has excellent spalling and corrosion resistances, and a method for producing thereof. The brick is obtained by adding an organic binder to a refractory raw material mixture followed by kneading, molding, and heat-treating, wherein the mixture includes total 0.1 to 2.0 mass% of pitch and/or carbon black, total 0.1 to 1.0 mass% of aluminum and/or aluminum alloy, 3.0 to 10.0 mass% of magnesia having particle diameter of less than 0.075 mm, and 87.0 to 96.0 mass% of magnesia having particle diameter of 0.075 to 5 mm; and a mass ratio of magnesia having particle diameter of 1 to 5 mm to that of 0.075 to 1 mm is 1.66 to 2.34; graphite is not included therein; and an apparent porosity thereof after heat-treatment under reductive atmosphere at 1400°C for 3 hours is 8.0% or less.

    MAGNESIA CARBON BRICK
    2.
    发明公开
    MAGNESIA CARBON BRICK 有权
    MAGNESIUMOXID-KOHLENSTOFF斯坦

    公开(公告)号：EP2952494A1

    公开(公告)日：2015-12-09

    申请号：EP14745785.7

    申请日：2014-01-29

    申请人： Krosakiharima Corporation

    发明人： SHIOHAMA, Michiharu ,  TANAKA, Masato ,  MATSUO, Yoshinori ,  YOSHITOMI, Jouki

    IPC分类号： C04B35/043

    CPC分类号： C04B35/0435 ,  C04B2235/3205 ,  C04B2235/3821 ,  C04B2235/402 ,  C04B2235/425 ,  C04B2235/428 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5472 ,  C04B2235/652 ,  C04B2235/6567 ,  C04B2235/77 ,  C04B2235/9692

    摘要： In the present invention, the attempt was made to increase the denseness (to lower the porosity) of a magnesia carbon brick furthermore thereby providing the magnesia carbon brick having a high durability never found in the past. The magnesia carbon brick of the present invention comprises a magnesia raw material and a graphite, wherein the magnesia carbon brick contains the graphite with the amount thereof in the range of 8% or more by mass and 25% or less by mass and the magnesia raw material with the amount thereof in the range of 75% or more by mass and 92% or less by mass, the both amounts being relative to the total amount of the magnesia raw material and the graphite; as a grain size distribution of the magnesia raw material, the magnesia raw material having particle diameter of in the range of 0.075 mm or more and 1 mm or less is blended with the amount thereof being 35% or more by mass relative to the total amount of the magnesia raw material and the graphite, and a mass ratio of the magnesia raw material having the particle diameter of in the range of 0.075 mm or more and 1 mm or less to the magnesia raw material having the particle diameter of less than 0.075 mm is 4.2 or more; and an apparent porosity thereof after firing in reducing atmosphere for 3 hours at 1400°C is 7.8% or less.

    摘要翻译： 在本发明中，尝试增加氧化镁碳砖的致密度（降低孔隙率），从而提供具有过去从未发现的高耐久性的氧化镁碳砖。 本发明的氧化镁碳砖包括氧化镁原料和石墨，其中氧化镁碳砖含有其量为8质量％以上且25质量％以下的石墨，氧化镁原料 其量为75质量％以上且92质量％以下的材料，两者的量相对于氧化镁原料和石墨的总量; 作为氧化镁原料的粒度分布，将粒径为0.075mm以上且1mm以下的氧化镁原料配合成相对于总量的35质量％以上的量 的氧化镁原料和石墨，以及粒径为0.075mm以上至1mm以下的氧化镁原料与粒径小于0.075mm的氧化镁原料的质量比 是4.2以上; 并且在1400℃下在还原气氛中烧成3小时后的表观孔隙率为7.8％以下。

    MAGNESIA-CARBON BRICK
    3.
    发明公开
    MAGNESIA-CARBON BRICK 审中-公开
    MAGNESIUMOXID-KOHLENSTOFF斯坦

    公开(公告)号：EP2947060A1

    公开(公告)日：2015-11-25

    申请号：EP14740937.9

    申请日：2014-01-15

    申请人： Krosakiharima Corporation

    发明人： TANAKA, Masato ,  SHIOHAMA, Michiharu ,  MATSUO, Yoshinori ,  YOSHITOMI, Jouki

    IPC分类号： C04B35/043

    CPC分类号： C04B35/043 ,  C04B35/013 ,  C04B35/0435 ,  C04B2235/3206 ,  C04B2235/3821 ,  C04B2235/402 ,  C04B2235/425 ,  C04B2235/428 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5472 ,  C04B2235/652 ,  C04B2235/77

    摘要： In the present invention, the attempt was made to increase the denseness (lowering the porosity) of a magnesia carbon brick furthermore thereby providing the magnesia carbon brick having high durability never found in the past. The magnesia carbon brick of the present invention comprises a magnesia raw material and a graphite, wherein the magnesia carbon brick contains the graphite with amount of in the range of 3% or more by mass and 25% or less by mass and the magnesia raw material with amount of in the range of 75% or more by mass and 97% or less by mass, the both amounts being relative to total amount of the magnesia raw material and the graphite; and an apparent porosity thereof after reductive firing for 3 hours at 1400°C is 7.8% or less.

    摘要翻译： 在本发明中，尝试提高氧化镁碳砖的致密性（降低孔隙率），从而提供过去没有发现的高耐久性的氧化镁碳砖。 本发明的氧化镁碳砖包括氧化镁原料和石墨，其中，氧化镁碳砖含有量在3质量％以上且25质量％以下的石墨，氧化镁原料 其量为75质量％以上且97质量％以下，两者的量相对于氧化镁原料和石墨的总量; 在1400℃还原烧成3小时后的表观孔隙率为7.8％以下。

    DURABLE SLEEVE BRICKS
    6.
    发明公开
    DURABLE SLEEVE BRICKS 有权
    HALTBARE STOPFENSTANGENROHRE

    公开(公告)号：EP2103580A1

    公开(公告)日：2009-09-23

    申请号：EP07831266.7

    申请日：2007-11-06

    申请人： Krosakiharima Corporation

    发明人： TANAKA, Masato ,  HATAE, Eiichiro ,  HOKII, Toshiyuki ,  YOSHITOMI, Joki

    IPC分类号： C04B35/043 ,  C21C5/46

    CPC分类号： C04B35/043 ,  B22F2003/248 ,  B22F2998/10 ,  C04B35/013 ,  C04B35/0435 ,  C04B35/62665 ,  C04B35/63496 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/3244 ,  C04B2235/3418 ,  C04B2235/3804 ,  C04B2235/3808 ,  C04B2235/3813 ,  C04B2235/3821 ,  C04B2235/3826 ,  C04B2235/401 ,  C04B2235/402 ,  C04B2235/404 ,  C04B2235/421 ,  C04B2235/422 ,  C04B2235/424 ,  C04B2235/425 ,  C04B2235/428 ,  C04B2235/48 ,  C04B2235/5292 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5472 ,  C04B2235/77 ,  C04B2235/94 ,  C04B2235/95 ,  C04B2235/96 ,  C21C5/4653 ,  C22C29/12 ,  F27D1/0006 ,  C22C1/05 ,  B22F1/0059 ,  B22F3/04 ,  B22F3/24

    摘要： Disclosed is a magnesia-carbon based sleeve brick for steelmaking converters, which is obtained by adding, to a refractory raw material mix containing 60 to 95 mass% of a magnesia raw material and 5 to 20 mass% of graphite, a metal powder of one or more selected from the group consisting of Al, Si, Mg, Ca, Cr and an alloy thereof, in an amount of greater than 3 to 6 mass%, and an organic binder, in addition to 100 mass% of the refractory raw material mix, and subjecting the resulting mixture to kneading, forming and heat treatment, wherein the sleeve brick is used under a condition that a thickness thereof is set at 70 mm or less. This makes it possible to prevent cracking which would otherwise occur in the sleeve brick itself, to allow the sleeve brick to have enhanced durability. One or more selected from the group consisting of B, B 4 C, MgB 2 , CaB 6 and CrB may be further added in an amount of 0.1 to 3 mass%, in addition to 100 mass% of the refractory raw material mix, to enhance strength and oxidation resistance and further enhance the durability. The magnesia raw material may comprise a first particle fraction having a particle diameter of greater than 10 to 500 µm and occupying 20 to 50 mass% in the refractory raw material mix, and a second particle fraction having a particle diameter of 10 µm or less and occupying 5 mass% or less in the refractory raw material mix, to additionally enhance corrosion resistance and thermal shock resistance.

    摘要翻译： 公开了一种用于炼钢转炉的氧化镁 - 碳基套筒砖，其通过在含有60〜95质量％的氧化镁原料和5〜20质量％的石墨的耐火材料混合物中添加一种金属粉末 或更多选自Al，Si，Mg，Ca，Cr及其合金，其含量大于3至6质量％，除了100质量％的耐火原料外，还包括有机粘合剂 混合，并对所得混合物进行捏合，成型和热处理，其中在其厚度设定在70mm以下的条件下使用套筒砖。 这使得可以防止否则将在套筒砖本身中发生的开裂，以允许套筒砖具有增强的耐久性。 除了100质量％的耐火原料混合物之外，还可以将0.1〜3质量％的从B，B 4 C，MgB 2，CaB 6，CrB中选出的一种以上添加至 提高强度和抗氧化性，进一步提高耐久性。 所述氧化镁原料可以含有在所述耐火材料混合物中具有大于10〜500μm且粒径为20〜50质量％的第一粒子部分和粒径为10μm以下的第二粒子部分， 在耐火原料混合物中占5质量％以下，另外提高耐腐蚀性和耐热冲击性。