CONVERTER OXYGEN BLOWING METHOD AND UPWARD BLOWING LANCE FOR CONVERTER OXYGEN BLOWING
    1.
    发明公开
    CONVERTER OXYGEN BLOWING METHOD AND UPWARD BLOWING LANCE FOR CONVERTER OXYGEN BLOWING 有权
    SAUERSTOFFBLASVERFAHREN UNDAUFWÄRTSBLASENDELANZEFÜRSAUERSTOFFBLASKONVERTER

    公开(公告)号:EP1340823A4

    公开(公告)日:2005-03-02

    申请号:EP01996630

    申请日:2001-11-15

    Applicant: JFE STEEL CORP

    CPC classification number: C21C5/4606

    Abstract: A converter oxygen blowing method capable of blowing oxygen by using upward blowing lance having a De Laval Nozzle fitted to the tip thereof, wherein the De Laval Nozzle comprises a nozzle back pressure P0 (kPa) meeting the requirement of an expression P0=Fhs/(0.00465.Dt ), where an acid feed rate for each rubber nozzle hole determined by the acid feed rate Fs (Nm /hr) in the high carbon area of a peak decarbonizing period is Fhs (Nm /hr) and a throat diameter is Dt (mm), and the outlet diameter (De) of the De Laval Nozzle meets the requirement of the expression De = 0.23 x Dt /{(Pe/P0) x [1-(Pe/P0) ] }, where a nozzle back pressure is P0 (kPa), atmospheric pressure is Pe (kPa), and the throat diameter is Dt (mm).

    Abstract translation: 在转炉中吹氧的方法使用在其尖端上安装有拉瓦尔喷嘴的顶吹喷枪。 Laval喷嘴具有满足公式Po = Fhs /(0.00465.Dt <2>)的喷嘴Po(kPa)的背压,相对于每秒的氧气流量Fhs(Nm 3 / hr) 拉瓦尔喷嘴的孔由氧气流量Fs(Nm 3 / hr)确定。 处于脱碳峰的高碳区域和喉直径Dt(mm)。 拉伐尔喷嘴的出口直径De相对于喷嘴的背压Po(kPa),环境压力Pe(kPa)和喉部直径Dt(mm)满足下式。 äÜüüüüüüääääääääääääääääääääääääää

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