发明授权
- 专利标题: Method for producing directly reduced, desulphurized iron
- 专利标题(中): 直接还原脱硫铁生产方法
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申请号: US09830561申请日: 2001-05-07
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公开(公告)号: US06464752B1公开(公告)日: 2002-10-15
- 发明人: Jean-Luc Roth , Thomas Hansmann , Romain Frieden , Marc Solvi
- 申请人: Jean-Luc Roth , Thomas Hansmann , Romain Frieden , Marc Solvi
- 优先权: LU90314 19981105
- 主分类号: C21B1308
- IPC分类号: C21B1308
摘要:
The invention relates to a method for producing directly reduced, desulfurized iron in a multiple-hearth furnace which comprises two zones arranged one above the other and each having several hearths. Iron ore is reacted with a reducing agent in a first zone of the multiple-hearth furnace at a temperature ranging from 800° C. to 1100° C. to obtain metallic iron. In addition, the gases are desulfurized using desulphurizing agents, whereby the directly reduced iron is discharged from the multiple-hearth furnace and the desulfurized gases are guided into a second zone where the iron ore is preheated to a temperature ranging from 600° C. to 800° C.
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