Lance structure for oxygen-blowing process in top-blown converters
    1.
    发明授权
    Lance structure for oxygen-blowing process in top-blown converters 失效
    顶吹转炉中吹氧过程的喷枪结构

    公开(公告)号:US4541617A

    公开(公告)日:1985-09-17

    申请号:US487566

    申请日:1983-04-22

    CPC分类号: F27D3/18 C21C5/4606

    摘要: Herein disclosed is a lance structure for use with a top-blown converter. The lance structure is constructed to include a cylindrical sheath having a bottom wall and a flux supply tube disposed at the center of the sheath and defining a passage for carrying slag-forming flux in a powdered form. Further inclusive are a plurality of oxygen supply tubes which are arranged in the sheath and around the flux supply tube and which define oxygen supply passages. From the oxygen supply tubes, there lead a corresponding number of Laval nozzles which have their exits opened in the sheath bottom so that the oxygen gas supplied through the oxygen supply passages may be blown in the form of supersonic jets to penetrate into the molten iron contained in the converter. The flux supply tube is formed with ports which are opened into the Laval nozzles just upstream of the exits thereof to feed the flux together with a carrier gas to the supersonic oxygen jets so that the carrier gas flows may merge into the oxygen jets. Thus, the powdered flux can be uniformly dispersed in the oxygen jets without wearing and damaging the inner walls of the Laval nozzles and can be carried by the jets deeply into the molten iron.

    摘要翻译: 这里公开了一种用于顶吹转炉的喷枪结构。 喷枪结构被构造为包括具有底壁的圆柱形护套和设置在护套中心处的通量供给管,并且限定用于承载粉末形式的成渣助熔剂的通道。 进一步包括多个供氧管,其布置在护套中并且围绕焊剂供应管并且限定供氧通道。 从供氧管中,引出相应数量的拉瓦尔喷嘴,其出口在鞘底部开口,使得通过供氧通道供应的氧气可以以超音速喷气的形式吹入,以渗透到所含的铁水中 在转换器中。 助焊剂供应管形成有在其出口的上游开口进入拉瓦尔喷嘴的端口,以将载气与载气一起供给超声波氧气射流,使得载气流可以合并到氧气射流中。 因此,粉末焊剂可以均匀地分散在氧气射流中,而不会磨损和损坏拉瓦尔喷嘴的内壁,并且可以通过射流深深地携带在铁水中。