Refractory for use in casting operations
    1.
    发明授权
    Refractory for use in casting operations 失效
    用于铸造操作的耐火材料

    公开(公告)号:US5506181A

    公开(公告)日:1996-04-09

    申请号:US269096

    申请日:1994-06-30

    IPC分类号: C04B35/101 C04B35/10

    CPC分类号: C04B35/101

    摘要: A refractory of the invention is used in casting operation, which has good spalling resistance and corrosion resistance. The refractory includes: 0.0357-2.6548 wt % of amorphous silica particles having a specific surface area within a range of 15-30 m.sup.2 /g; 8.8495-28.5612 wt % of alumina particles having a particle diameter within a range of 10-50 mm; 1.3986-18.1715 wt % of at least one of fused magnesia and sintered magnesia, which contains 0.6993-10.9041 wt % of magnesia having a maximum particle diameter under 44 .mu.m; 0.6993-13.630 wt % of alumina cement; and 45.4545-88.1417 wt % of alumina. When the refractory is used, at lease one of fused magnesia and sintered magnesia surrounds the alumina particles, which react together to generate spinel to thereby form micro-crack layer around the alumina particles for preventing propagation of cracks in a refractory structure.

    摘要翻译: 本发明的耐火材料用于具有良好的耐剥离性和耐腐蚀性的铸造操作中。 耐火材料包括:0.0357-2.6548重量%的比表面积在15-30m 2 / g范围内的无定形二氧化硅颗粒; 8.8495-28.5612重量%的粒径在10-50毫米范围内的氧化铝颗粒; 熔融氧化镁和烧结氧化镁中的至少一种的1.3986-18.1715重量%,其含有0.6993-10.9041重量%的最大粒径在44μm以下的氧化镁; 0.6993-13.630重量%的氧化铝水泥; 和45.4545-88.1417重量%的氧化铝。 当使用耐火材料时,熔融氧化镁和烧结氧化镁中的至少一个包围氧化铝颗粒,氧化铝颗粒一起反应以产生尖晶石,从而在氧化铝颗粒周围形成微裂纹层,以防止耐火结构中的裂纹扩展。