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公开(公告)号：US20150203931A1
公开(公告)日：2015-07-23
申请号：US14416175
申请日：2013-08-05
发明人： Takeshi Sugiyama , Takao Harada , Junichi Shiino , Tsuyoshi Mimura , Katsuyuki Iijima , Takanori Oka
CPC分类号： C21B11/08 , B03C1/02 , B03C1/30 , B03C2201/20 , B07B15/00 , C21B13/0046 , C21B13/0086 , C21B13/105 , C21B13/14 , C22B1/2406 , C22B1/245 , Y02P10/216
摘要： The first purpose of the present invention is to provide a method for producing metallic iron, whereby, in the production of metallic iron by heating an agglomerate, which comprises an iron oxide-containing material and a carbonaceous reductant, in a movable hearth type heating furnace, metallic iron can be efficiently collected from a reduced product containing metallic iron and a slag, said reduced product being obtained by heating the agglomerate. The method for producing metallic iron according to the first embodiment of the present invention comprises: a step for forming an agglomerate of a mixture which comprises an iron oxide-containing material and a carbonaceous reductant; a step for introducing the obtained agglomerate into a movable hearth type heating furnace and reducing the same by heating; a step for crushing a reduced product containing metallic iron and a slag, said reduced product being discharged from the movable hearth type heating furnace, using an impact crusher; and a step for selecting and collecting the metallic iron using a separator.
摘要翻译： 本发明的第一个目的是提供一种生产金属铁的方法，其中通过在可移动的炉床式加热炉中加热包含含氧化铁的材料和含碳还原剂的附聚物来生产金属铁 可以从含有金属铁和渣的还原产物中有效地收集金属铁，所述还原产物是通过加热附聚物获得的。 根据本发明第一实施方案的金属铁的制造方法包括：形成含有含氧化铁的材料和碳质还原剂的混合物的附聚物的工序; 将获得的凝聚体引入可动炉床式加热炉中并通过加热将其还原的步骤; 用于粉碎含有金属铁和渣的还原产物的步骤，所述还原产物使用冲击式破碎机从可移动炉床式加热炉排出; 以及使用分离器选择和收集金属铁的步骤。
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公开(公告)号：US20150027275A1
公开(公告)日：2015-01-29
申请号：US14377373
申请日：2013-02-28
发明人： Shoichi Kikuchi , Takao Harada , Shingo Yoshida
CPC分类号： C21B11/08 , B22F9/22 , C21B3/00 , C21B13/0046 , C21B13/105 , C22B1/245
摘要： A process for manufacturing reduced iron agglomerates which comprises introducing starting agglomerates that comprise both an iron oxide-containing material and a carbonaceous reducing agent onto the hearth of a moving-bed heating furnace, and heating the agglomerates to reduce the iron oxide contained in the agglomerates, wherein the iron oxide-containing material contained in the starting agglomerates has a mean particle diameter of 4 to 23 μm and contains at least 18% of particles having diameters of 10 μm or less. By the use of such starting agglomerates, the process attains: an improvement in the yield of reduced iron agglomerates having large particle diameters; a reduction in the manufacturing time, said reduction leading to an enhancement in the productivity; and a remarkable reduction in the content of impurities such as sulfur in the reduced-iron agglomerates.
摘要翻译： 一种制造还原铁附聚物的方法，其包括将包含含铁氧化物的材料和碳质还原剂两者的起始附聚物引入移动床加热炉的炉床上，并加热附聚物以减少附聚物中所含的氧化铁 其中，起始附聚物中含有的含氧化铁的材料的平均粒径为4〜23μm，含有至少18％的直径为10μm以下的粒子。 通过使用这种起始附聚物，该方法得到：具有大粒径的还原铁团块的产率的改善; 减少制造时间，所述减少导致生产率的提高; 还原铁附聚物中的杂质如硫的含量显着降低。
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