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公开(公告)号:US6129776A
公开(公告)日:2000-10-10
申请号:US913836
申请日:1997-09-23
申请人: Masaaki Naito , Norimitsu Konno , Yasuhiko Fujiwara , Kyoichi Araki , Teruhiko Kokubun , Tadashi Obara , Yasushi Obara
发明人: Masaaki Naito , Norimitsu Konno , Yasuhiko Fujiwara , Kyoichi Araki , Teruhiko Kokubun , Tadashi Obara , Yasushi Obara
CPC分类号: C21B5/008 , C21B11/02 , C21B13/023 , C21C5/56 , Y02P10/216
摘要: A method for operating a shaft furnace which comprises charging the furnace with an iron source having a low degree of metallization and thus requiring reduction, an iron source having a high degree of metallization and thus requiring nothing but melting, and a solid fuel, and blowing an oxygen-containing gas at ordinary or higher temperature up to 600.degree. C. into the furnace through tuyeres to reduce and melt the iron sources. The optimal values of .eta.co (gas utilization factor) are determined from the average degree of metallization of the iron sources, and the shaft furnace is controlled so that the effluent gas from the furnace has the optimal .eta.co values. The control is accomplished by regulating the height of the charge, regulating the height of the coke bed, etc., using multistage tuyeres, and radially partitioning the charge. Thus, the iron sources can be efficiently reduced and melted at a low fuel ratio.
摘要翻译: PCT No.PCT / JP97 / 00164 Sec。 371日期1997年9月23日 102(e)1997年9月23日PCT PCT 1997年1月24日PCT公布。 公开号WO97 / 27337 日期1997年7月31日一种用于操作竖炉的方法,其包括用具有低金属化程度的铁源并且因此需要还原的铁源,具有高度金属化的铁源,因此仅需要熔化, 固体燃料,并通过风口将通常或更高温度至600℃的含氧气体吹入炉中以减少和熔化铁源。 eta co(气体利用系数)的最优值由铁源的平均金属化度确定,并且控制竖炉,使得来自炉的废气具有最佳的η值。 通过使用多级风口调节电荷的高度,调节焦炭床的高度等,以及径向分配电荷来实现控制。 因此,可以以低燃料比有效地还原和熔融铁源。