Title:
METHOD FOR CHARGING RAW MATERIALS INTO BLAST FURNACE
Document Type and Number:
WIPO Patent Application WO/2017/159641
Kind Code:
A1
Abstract:
In a blast furnace operation that is performed by forming coke-mixed ore layers and coke layers in a blast furnace, the present invention ensures air permeability in the blast furnace, by appropriately controlling the amount of coke mixed in the coke-mixed ore layers in accordance with the contained amount of powdered coke in coke that forms the coke layers. This method for charging raw materials into a blast furnace to form a laminate of coke-mixed ore layers and coke layers comprises: measuring the proportion of coke grains having a minor axis length which is smaller than or equal to a given minor axis length within the range of 5-35 mm in coke for forming the coke layers, by using a grain size measurement sensor disposed above a piece of conveying equipment for conveying the coke; adjusting the amount of coke to be mixed in a raw material mixture to be less than the amount of coke to be mixed under a reference condition, on the basis of the measured proportion, where the reference condition is defined as a condition that the coke for forming the coke layers does not contain any coke grains having a minor axis length of 35 mm or less; and mixing an amount of coke which corresponds to the difference from that defined by the reference condition as the coke for forming the coke layer.
Inventors:
ICHIKAWA KAZUHIRA (JP)
KASHIHARA YUSUKE (JP)
OYAMA NOBUYUKI (JP)
TSUDA KAZURO (JP)
YAMAHIRA NAOSHI (JP)
ISHII KUNIHIKO (JP)
KASHIHARA YUSUKE (JP)
OYAMA NOBUYUKI (JP)
TSUDA KAZURO (JP)
YAMAHIRA NAOSHI (JP)
ISHII KUNIHIKO (JP)
Application Number:
PCT/JP2017/010058
Publication Date:
September 21, 2017
Filing Date:
March 14, 2017
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B5/00; C21B7/18; C21B7/24; F27D21/00
Domestic Patent References:
WO2013172035A1 | 2013-11-21 |
Foreign References:
JPH08283804A | 1996-10-29 | |||
JP2002221481A | 2002-08-09 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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