公开(公告)号：US06241803B1

公开(公告)日：2001-06-05

申请号：US09487178

申请日：2000-01-19

申请人： Kojiro Fuji

发明人： Kojiro Fuji

IPC分类号： C21B1300

CPC分类号： C21B13/0086 ,  C21B13/0046 ,  C21B13/105 ,  C22B1/26

摘要： A method for manufacturing reduced iron pellets comprises the steps of heating iron oxide pellets incorporating carbonaceous material to yield reduced iron pellets having an apparent density of not more than 4.0 g/cm3, cooling the hot reduced iron pellets by using water at an average cooling rate between 1,500° C./min and 500° C./min, when the surfaces of the reduced iron pellets are cooled from 650° C. to 150° C. The method described above does not require expensive facilities for processing briquettes and can manufacture the reduced iron pellets having high degree of metallization, superior crushing strength, and an apparent density of not more than 4.0 g/cm3.

摘要翻译： 制造还原铁丸的方法包括以下步骤：加热含有碳质材料的氧化铁粒料，得到表观密度不大于4.0g / cm 3的还原铁丸，用平均冷却速度的水冷却热还原铁丸 当还原铁丸的表面从650℃冷却至150℃时，在1500℃/分钟和500℃/分钟之间。上述方法不需要昂贵的处理压块的设备并且可以制造 还原铁丸具有高度的金属化，优异的抗碎强度和不超过4.0g / cm 3的表观密度。

公开(公告)号：US06918947B2

公开(公告)日：2005-07-19

申请号：US10395340

申请日：2003-03-25

申请人： Takeshi Maki ,  Yoshiyuki Matsui ,  Takeshi Sugiyama ,  Takao Harada ,  Masahiko Tetsumoto ,  Hiroshi Tamazawa ,  Tadashi Ueda ,  Koichi Morioka ,  Nobuyuki Iwasaki ,  Hidetoshi Tanaka ,  Kojiro Fuji ,  Hiroshi Sugitatsu

发明人： Takeshi Maki ,  Yoshiyuki Matsui ,  Takeshi Sugiyama ,  Takao Harada ,  Masahiko Tetsumoto ,  Hiroshi Tamazawa ,  Tadashi Ueda ,  Koichi Morioka ,  Nobuyuki Iwasaki ,  Hidetoshi Tanaka ,  Kojiro Fuji ,  Hiroshi Sugitatsu

IPC分类号： C21B13/00 ,  C21B13/10 ,  C22B1/245 ,  C22B5/10 ,  C22B5/16 ,  C22B19/30 ,  C21B13/08

CPC分类号： C22B19/30 ,  C21B13/0046 ,  C21B13/105 ,  C22B1/245 ,  C22B5/10 ,  C22B5/16 ,  Y02P10/216

摘要： A method for making reduced iron using blast-furnace sludge is provided. The method includes a mixing step of mixing the blast-furnace sludge and an iron-oxide-containing powder to prepare a mixed material, an agglomerating step of agglomerating the mixed material to form agglomerates, a feeding step of feeding the agglomerates onto a continuously moving hearth, and a reducing step of heating the agglomerates to remove zinc and reduce the agglomerates.

摘要翻译： 提供了使用高炉污泥制造还原铁的方法。 该方法包括混合高炉污泥和含铁氧化物的粉末以制备混合材料的混合步​​骤，使混合材料凝聚以形成附聚物的附聚步骤，将附聚物进料到连续移动的进料步骤 炉底，以及还原步骤，加热附聚物以除去锌并还原附聚物。

公开(公告)号：US06602320B2

公开(公告)日：2003-08-05

申请号：US09828950

申请日：2001-04-10

申请人： Kojiro Fuji ,  Hidetoshi Tanaka ,  Shoichi Kikuchi ,  Takaya Kitajima ,  Osamu Tsuchiya

发明人： Kojiro Fuji ,  Hidetoshi Tanaka ,  Shoichi Kikuchi ,  Takaya Kitajima ,  Osamu Tsuchiya

IPC分类号： C21B1308

CPC分类号： C21B13/10 ,  C21B13/105 ,  Y02P10/136

摘要： A method for producing reduced iron comprises agglomerating a raw material mixture containing a carbonaceous reducing agent and an iron oxide-containing material into small agglomerates, heating the agglomerate within a heat reduction furnace, thereby solid reducing the iron oxide in the agglomerate to produce solid reduced iron, or further heating the solid reduced iron, melting the metallic iron produced by the reduction, and coagulating the molten metallic iron while separating the slag component contained in the small agglomerates to provide granular metallic iron, which is characterized by using a agglomerate having a particle size of 10 mm or less or 3-7 mm, preferably less than 6 mm, more preferably 3 mm or more and less than 6 mm as the small agglomerates.

摘要翻译： 一种还原铁的制造方法包括将含有碳质还原剂和含铁氧化物的原料混合物凝集成小团聚物，在热还原炉内加热附聚物，由此固体还原附聚物中的氧化铁以产生固体还原 铁，或进一步加热固体还原铁，熔化通过还原产生的金属铁，并使熔融的金属铁凝结，同时分离包含在小团块中的炉渣成分，以提供粒状金属铁，其特征在于使用具有 粒径为10mm以下或3-7mm，优选小于6mm，更优选为3mm以上且小于6mm。

公开(公告)号：US6129777A

公开(公告)日：2000-10-10

申请号：US275017

申请日：1999-03-24

申请人： Kojiro Fuji ,  Hidetoshi Tanaka ,  Takao Harada ,  Takeshi Sugiyama ,  Yoshimichi Takenaka ,  Kazuya Miyagawa ,  Shoji Shirouchi ,  Haruhisa Iwakiri ,  Makoto Nishimura ,  Takao Umeki ,  Sumito Hashimoto ,  Teruhisa Uehara

发明人： Kojiro Fuji ,  Hidetoshi Tanaka ,  Takao Harada ,  Takeshi Sugiyama ,  Yoshimichi Takenaka ,  Kazuya Miyagawa ,  Shoji Shirouchi ,  Haruhisa Iwakiri ,  Makoto Nishimura ,  Takao Umeki ,  Sumito Hashimoto ,  Teruhisa Uehara

IPC分类号： C21B13/10 ,  C21B11/00

CPC分类号： C21B13/10 ,  C21B13/105 ,  Y02P10/136

摘要： Iron oxide agglomerates incorporated with the carbonaceous material having a particle size within a range of about 10 to 30 nm are prepared upon production of reduced iron agglomerates. Then, the iron oxides agglomerates incorporated with the carbonaceous material were laid thinly at a laying density of less than 1.4 kg/m.sup.2 /mm or lower on a hearth of a moving hearth furnace. Subsequently, the iron oxide agglomerates are heated rapidly such that the surface temperature of the iron oxide agglomerates reaches 1200.degree. C. or higher within one-third of the retention period of time of the iron oxide agglomerates in the moving hearth furnace. Then, the iron oxide agglomerates are reduced till the metallization ratio thereof reaches 85% or higher to form reduced iron agglomerates and then the reduced iron agglomerates are discharged out of the moving hearth furnace. With the procedures, reduced iron agglomerates of a high average quality can be obtained at a high productivity.

摘要翻译： 在生产还原铁附聚物时制备与含有约10至30nm范围内的粒度的含碳材料结合的氧化铁附聚物。 然后，在移动的炉底炉的炉床上以与小于1.4kg / m 2 / mm 2或更低的铺设密度薄层地铺设掺入碳质材料的氧化铁附聚物。 随后，快速加热氧化铁附聚物，使铁氧化物附聚物的表面温度在移动的炉床炉中的氧化铁附聚物的保留时间的三分之一内达到1200℃或更高。 然后，将氧化铁附聚物还原直到其金属化率达到85％以上，形成还原铁团聚体，然后将还原铁团聚体从移动的炉床炉排出。 通过该方法，可以以高生产率获得高平均质量的还原铁团块。