发明申请
- 专利标题： Metal oxide-bearing green pellets for reducing furnace, method of production of same, method of reduction of same, and reduction facility
- 专利标题（中）： 用于还原炉的含金属氧化物的绿色颗粒，其制造方法，还原方法和还原设备
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申请号： US12804844申请日： 2010-07-29
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公开(公告)号： US20100294079A1公开(公告)日： 2010-11-25
- 发明人: Tetuharu Ibaraki , Hiroshi Oda , Shoji Imura , Masaharu Takahashi
- 申请人： Tetuharu Ibaraki , Hiroshi Oda , Shoji Imura , Masaharu Takahashi
- 申请人地址： JP Tokyo
- 专利权人： Nippon Steel Corporation
- 当前专利权人： Nippon Steel Corporation
- 当前专利权人地址： JP Tokyo
- 优先权： JP2000-331181 20001030; JP2000-331182 20001030; JP2001-269795 20010906; JP2001-269796 20010906
- 主分类号： B22F9/20
- IPC分类号： B22F9/20
摘要：
The present invention provides a method and facility for preventing crumbling and powderization of green pellets when producing high strength green pellets using a powder feedstock and using the pellets in a rotary hearth reducing furnace and for efficiently reducing the same. It comprises kneading by a kneader 5 a feedstock of a powder of a fine particle size (20 to 80 wt % having size of not more than 10 μm) including a metal oxide and carbon-bearing powder fed from a feed storage tank 1 and producing green pellets by a pan type pelletizer 7. The green pellets are screened by a pellet screen 9, then dried by a pellet dryer 11 and reduced by firing in a rotary hearth reducing furnace 13. At that time, the green pellets are continuously conveyed to prevent crumbling.
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