公开(公告)号：US20170335416A1

公开(公告)日：2017-11-23

申请号：US15662050

申请日：2017-07-27

申请人： TETSUGEN CORPORATION

发明人： Seita Uekawa ,  Kazunori Nabekura

IPC分类号： C21B11/06 ,  C22B1/248 ,  C21B11/10 ,  C21B13/10 ,  C22B1/216 ,  C22B1/24 ,  F27B7/42 ,  F27B7/36 ,  F27B7/34 ,  F27B7/33 ,  F27B7/10 ,  F27B7/08 ,  F27B7/02 ,  C22B7/02 ,  F27D17/00 ,  C21B2100/44

CPC分类号： C21B11/06 ,  C21B11/10 ,  C21B13/105 ,  C21B2100/44 ,  C22B1/216 ,  C22B1/2406 ,  C22B1/248 ,  C22B7/02 ,  F27B7/02 ,  F27B7/08 ,  F27B7/10 ,  F27B7/34 ,  F27B7/36 ,  F27D17/004 ,  F27D17/008 ,  Y02P10/136 ,  Y02P10/216

摘要： The present invention relates to a method and apparatus for producing reduced iron from ironmaking dust which contains iron oxide which is generated at an ironmaking plant, takes note of the rotary kiln reduction method which does not require pretreatment of the dust, and has as its problem the pursuit of facilities which achieve further improvement of heat efficiency and stable operation.To solve this problem, the present invention is characterized by heating and reducing carbon-containing shaped materials in a single closed space in which an internal heat type rotary kiln and an external heat type rotary kiln are arranged in series and including at least the insides of the two rotary kilns during which making the reduced exhaust gas which is generated at the external heat type rotary kiln burn inside of the internal heat type rotary kiln.