Title:
METHOD FOR OPERATING BLAST FURNACE
Document Type and Number:
WIPO Patent Application WO/2017/170100
Kind Code:
A1
Abstract:
Provided is a method for operating a blast furnace with which it is possible to reduce the reduction agent ratio of the blast furnace. In this method for operating a blast furnace, pulverized coal is blown from a blast furnace tuyere. The method comprises: adjusting a coal containing water and volatile matter, thereby providing an adjusted pulverized coal having a specific surface area within the range of 2 m2/g to 1000 m2/g, a lower heating value of 27170 kJ/kg or more and a volatile matter content within the range of 3% by mass to 25% by mass; and blowing pulverized coal containing the adjusted pulverized coal in an amount of 10% by mass or more from the blast furnace tuyere.
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Inventors:
YAMAMOTO NAOKI (JP)
MURAO AKINORI (JP)
MORIYA KOTA (JP)
OYAMA NOBUYUKI (JP)
MURAO AKINORI (JP)
MORIYA KOTA (JP)
OYAMA NOBUYUKI (JP)
Application Number:
PCT/JP2017/011641
Publication Date:
October 05, 2017
Filing Date:
March 23, 2017
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B5/00
Foreign References:
| JPH04110405A | 1992-04-10 | |||
| JP2002194408A | 2002-07-10 | |||
| JPH06264122A | 1994-09-20 | |||
| JP2014031548A | 2014-02-20 | |||
| JP2014031548A | 2014-02-20 | |||
| JP2014043605A | 2014-03-13 | |||
| JPH04110405A | 1992-04-10 | |||
| JP2003247007A | 2003-09-05 |
Other References:
See also references of EP 3438290A4
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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