METHOD AND APPARATUS FOR PRODUCING COMPOUND POWDERS
    83.
    发明申请
    METHOD AND APPARATUS FOR PRODUCING COMPOUND POWDERS 有权
    生产复合粉末的方法和装置

    公开(公告)号:US20160257566A1

    公开(公告)日:2016-09-08

    申请号:US15132070

    申请日:2016-04-18

    申请人: Qualmat, Inc.

    发明人: Bo LIU Hongjie QIU

    摘要: A gas atomization apparatus is disclosed for producing high purity fine refractory compound powders. After the system reaches high vacuum, a first stage inert atomizing gas breaks superheated metal melt into droplets and a second stage reactive atomizing gas breaks the droplets further into ultrafine droplets while reacts with them to form refractory compound powders. The first stage atomizing gas is inert gas able to break up melt into droplets and prevent crust formation on the nozzle front. A reaction time enhancer is arranged at bottom of reaction chamber to furnish a reactive gas flow in a reverse direction of the falling droplets and powders. Under the reverse gas flow, the falling droplets and powders change moving direction and travel longer distance in reaction chamber to increase reaction time. This apparatus can produce refractory powders with ultrahigh purity and uniform powder size while maintain high process energy efficiency.

    摘要翻译: 公开了一种用于生产高纯度精细耐火复合粉末的气体雾化装置。 在系统达到高真空之后,第一级惰性雾化气体将过热的金属熔体分解成液滴,第二级反应性雾化气体进一步将液滴分解成超细液滴,同时与其反应形成难熔化合物粉末。 第一级雾化气体是惰性气体,能够将熔体分解成液滴并防止喷嘴前端上的外壳形成。 反应时间增强剂被布置在反应室的底部,以在落下的液滴和粉末的相反方向上提供反应气流。 在反向气流下,滴落的液滴和粉末改变移动方向,并在反应室中行进更长的距离以增加反应时间。 该设备可以生产具有超高纯度和均匀粉末尺寸的耐火粉末,同时保持高的工艺能量效率。