Title:
PIG IRON PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2022/208902
Kind Code:
A1
Abstract:
A pig iron production method according to one embodiment of the present invention is for producing pig iron using a blast furnace with a tuyere, the method comprising: a step in which first layers that include an ore raw material and second layers that include coke are layered alternately within the blast furnace; a step in which coke is charged to a central section of the blast furnace; and a step in which the ore raw material in the layered first layers is reduced and melted while auxiliary fuel is blown into the blast furnace by hot air blasted from the tuyere. In the layering step, during one charge in which a layered unit formed by combining one of the first layers and one of the second layers is layered, the charging step is performed once or a plurality of times; and, in the one charge, the ratio R of the mass (ton/ch) of coke to be deposited in the central section to the mass (ton/ch) of the ore raw material to be loaded is at least a prescribed value α.
Inventors:
KASAI AKITO
YAKEYA MASAHIRO
YAKEYA MASAHIRO
Application Number:
PCT/JP2021/017806
Publication Date:
October 06, 2022
Filing Date:
May 11, 2021
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C21B5/00
Foreign References:
| JP2019127628A | 2019-08-01 | |||
| JPH01290709A | 1989-11-22 | |||
| JPH11286706A | 1999-10-19 | |||
| JPH1088208A | 1998-04-07 | |||
| JPS6056003A | 1985-04-01 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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