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Patent Searching and Data


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)
Application Number:
PCT/JP2017/010058
Publication Date:
September 21, 2017
Filing Date:
March 14, 2017
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B5/00; C21B7/18; C21B7/24; F27D21/00
Domestic Patent References:
WO2013172035A12013-11-21
Foreign References:
JPH08283804A1996-10-29
JP2002221481A2002-08-09
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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