Title:
METHOD FOR CHARGING RAW MATERIAL INTO BLAST FURNACE
Document Type and Number:
WIPO Patent Application WO/2016/051773
Kind Code:
A1
Abstract:
The present invention is a method for charging a raw material into a blast furnace in which coke and an ore raw material are charged into the blast furnace using a spiral chute, wherein the method is characterized in having a first step in which the coke is charged into the center region of the blast furnace and a center coke layer is formed, and a second step in which a raw material mixture of the coke and the ore raw material is charged into the outer periphery region located around the outer periphery of the center coke layer and an outer periphery mixture layer is formed, the second step being performed so that the coke ratio in the outer periphery mixture layer varies continuously or incrementally in the radial direction of the blast furnace. It is thereby possible to effectively reduce the ventilation resistance in the blast furnace without the presence of a coke slit.
Inventors:
HIROSAWA TOSHIYUKI (JP)
WATAKABE SHIRO (JP)
ICHIKAWA KAZUHIRA (JP)
SATO MICHITAKA (JP)
WATAKABE SHIRO (JP)
ICHIKAWA KAZUHIRA (JP)
SATO MICHITAKA (JP)
Application Number:
PCT/JP2015/004943
Publication Date:
April 07, 2016
Filing Date:
September 29, 2015
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B5/00
Domestic Patent References:
| WO2013172045A1 | 2013-11-21 |
Foreign References:
| JP2013241641A | 2013-12-05 |
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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