Invention Grant
US07879132B2 Method for reduction treatment of metal oxide or ironmaking waste and method for concentration and recovery zinc and/or lead
有权
金属氧化物或炼铁废物的还原处理方法及锌和/或铅的浓缩和回收方法
- Patent Title: Method for reduction treatment of metal oxide or ironmaking waste and method for concentration and recovery zinc and/or lead
- Patent Title (中): 金属氧化物或炼铁废物的还原处理方法及锌和/或铅的浓缩和回收方法
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Application No.: US10527809Application Date: 2003-09-11
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Publication No.: US07879132B2Publication Date: 2011-02-01
- Inventor: Hiroshi Ichikawa , Tetsuharu Ibaraki , Shoji Imura , Hiroshi Oda , Yoichi Abe , Shigeki Takahashi , Nobuyuki Kanemori , Satoshi Suzuki
- Applicant: Hiroshi Ichikawa , Tetsuharu Ibaraki , Shoji Imura , Hiroshi Oda , Yoichi Abe , Shigeki Takahashi , Nobuyuki Kanemori , Satoshi Suzuki
- Applicant Address: JP Tokyo
- Assignee: Nippon Steel Corporation
- Current Assignee: Nippon Steel Corporation
- Current Assignee Address: JP Tokyo
- Agency: Kenyon & Kenyon LLP
- Priority: JP2002-268414 20020913; JP2003-014268 20030123; JP2003-107420 20030411
- International Application: PCT/JP03/11654 WO 20030911
- International Announcement: WO2004/024961 WO 20040325
- Main IPC: C22B3/44
- IPC: C22B3/44 ; C22B7/02
Abstract:
A method of reduction treatment of metal oxides characterized by using as a material a powder containing metal oxides and containing alkali metals and halogen elements and further, in accordance with need, carbon, mixing said material with water to produce a slurry, then dehydrating this and charging the dehydrated material, mixed with another material in accordance with need, into a rotary hearth type reduction furnace for reduction.
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