Magnesia-spinel refractory and method of producing the same
    13.
    发明授权
    Magnesia-spinel refractory and method of producing the same 有权
    氧化镁 - 尖晶石耐火材料及其制造方法

    公开(公告)号:US06239051B1

    公开(公告)日:2001-05-29

    申请号:US09493017

    申请日:2000-01-28

    IPC分类号: C04B3504

    摘要: The present invention provides a magnesia-spinel refractory in which corrosion resistance and slag penetration resistance are significantly improved. The magnesia-spinel refractory is obtained by mixing magnesia granulated powder having a particle diameter of 10 to 150 &mgr;m and alumina powder having a particle diameter of 0.1 to 5 &mgr;m, molding the resultant mixture, and then burning the molded product to form a dense and strong combined structure of periclase and spinel. The mixture of magnesia and alumina contains powders of both components, or a powder of one of the components and a granulated powder of the other component. It is preferable to use a spray dryer method as granulating means, and a hydrostatic pressing method as molding means. These mixtures are used for producing magnesia-spinel protecting tube and crucible, bricks for copper smelting and converting furnaces, and magnesia-spinel protecting tube and crucible for copper smelting and converting furnace slag. In this case, the hydrostatic pressing method is used.

    摘要翻译: 本发明提供了耐腐蚀性和耐熔渣渗透性显着提高的氧化镁 - 尖晶石耐火材料。 通过混合粒径为10〜150μm的氧化镁粒状粉末和粒径为0.1〜5μm的氧化铝粉末,将所得混合物成型,然后将成型体燃烧形成致密的和 强韧组合结构的尖晶石和尖晶石。 氧化镁和氧化铝的混合物含有两种组分的粉末,或其中一种组分的粉末和另一种组分的造粒粉末。 优选使用喷雾干燥法作为造粒机构,以静压压制法作为成型机构。 这些混合物用于生产氧化镁 - 尖晶石保护管和坩埚,用于铜冶炼和转炉的砖,以及用于铜冶炼和转炉炉渣的氧化镁 - 尖晶石保护管和坩埚。 在这种情况下,使用静压法。

    Microscope with projector
    14.
    发明授权
    Microscope with projector 失效
    显微镜带投影机

    公开(公告)号:US4621913A

    公开(公告)日:1986-11-11

    申请号:US695208

    申请日:1985-01-25

    IPC分类号: G03B21/00 G02B21/36 G02B21/18

    CPC分类号: G02B21/364

    摘要: A microscope with a projector, comprising in combination: a mirror guiding skylight into the microscope; a lamp as a light source to emit light directly through said reflector into the microscope; a body tube having a fixed reflector and a rotatable mirror instead of eyepiece; a projector window in said body tube below said rotatable mirror; a screen located in the top of said body tube; and a hood used to cover said screen.

    摘要翻译: 具有投影仪的显微镜,其组合包括:将镜子引导到显微镜中的天窗; 作为光源的灯,将光直接通过所述反射器发射到显微镜中; 具有固定反射器和可旋转镜而不是目镜的主体管; 位于所述可旋转镜下面的所述主体管中的投影仪窗口; 位于所述体管顶部的屏幕; 以及用于覆盖所述屏幕的罩。