Method and an apparatus for manufacturing a hollow steel ingot
    2.
    发明授权
    Method and an apparatus for manufacturing a hollow steel ingot 失效
    中空钢锭的制造方法和装置

    公开(公告)号:US4615373A

    公开(公告)日:1986-10-07

    申请号:US771213

    申请日:1985-08-30

    IPC分类号: B22D7/04 B22D27/04

    CPC分类号: B22D7/04

    摘要: A method and an apparatus for manufacturing a hollow steel ingot are disclosed, which comprise coaxially arranging a cylindrical metallic core in a center of a mold and pouring molten steel into an annular casting space defined between the core and the mold to cool and solidify it. In this case, the core is constructed with a concentric double tube consisting of inner tube and outer tube and receives in its central portion a cooling gas tank provided at the outer peripheral surface with plural outlets opening toward the inner peripheral surface of the inner tube. An inert gas is flowed through an annular gap defined between the inner tube and the outer tube, while a cooling gas is blown toward the inner peripheral surface of the inner tube.

    摘要翻译: 公开了一种用于制造中空钢锭的方法和装置,其包括将圆柱形金属芯同心地布置在模具的中心并将钢水浇注到限定在芯体和模具之间的环形铸造空间中以冷却和固化。 在这种情况下,芯部由内管和外管构成的同心双管构成,并且在其中央部分容纳设置在外周面的冷却气罐,具有向内管内周面开口的多个出口。 惰性气体通过限定在内管和外管之间的环形间隙流动,同时向内管的内周表面吹送冷却气体。

    Method and apparatus for spray coating of refractory material to
refractory construction
    6.
    发明授权
    Method and apparatus for spray coating of refractory material to refractory construction 失效
    耐火材料喷涂施工方法及装置

    公开(公告)号:US5061527A

    公开(公告)日:1991-10-29

    申请号:US632638

    申请日:1990-12-26

    摘要: Spray coating is performed utilizing a mixture of refractory material and a combustionable metal powder. The size of the particle of the metal in the mixture is selected so that the particle size is large enough to be treated safely and is small enough to be transported by means of a gas flow. As a carrier gas for carrying the mixture, a non-combustionable gas or fuel gas is used. A fuel gas and a combustion-assisting gas are discharged toward the section to be treated on the surface for directing a combustioning frame. The refractor material with the carrier gas is discharged into the frame established by the fuel gas and the combustion-assisting gas. The average size of the metal particle to be used in the spray coating is limited to be greater than 50 .mu.m. By enlarging the particle size of the metal, combustion of the metal particle becomes difficult. Combustion of such large particle size metal can be assisted by discharging the combustion-assisting gas together with the fuel gas. This compensates combustion efficiency to be dropped by utilizing the larger particle size metal.

    摘要翻译: 具有喷枪(10)的装置,其具有用于耐火结构的喷涂的两个喷嘴(12,14)。 使用耐火材料和可燃金属粉末的混合物进行喷涂。 选择混合物中金属颗粒的尺寸使得颗粒尺寸足够大以便安全地处理并且足够小以通过气流传输。 作为用于承载混合物的载气,使用不可燃气体或燃料气体。 燃料气体和助燃气体在用于引导燃烧框架的表面上朝向要处理的区域排出。 具有载气的折射材料被排出到由燃料气体和助燃气体构成的框架中。 这通过利用较大的粒度金属来补偿燃烧效率降低。