Title:
PIG IRON MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/047880
Kind Code:
A1
Abstract:
In a pig iron manufacturing method according to an embodiment of the present invention pig iron is manufactured using a blast furnace having a tuyere, wherein the method comprises: a step for stacking, in the blast furnace, first layers that contain an ore raw material and second layers that contain coke, said first and second layers being stacked in alternating fashion; and a step for reducing and melting the ore raw material of the stacked first layers while an auxiliary fuel is blown into the blast furnace by means of a hot airflow blown from the tuyere. The ore raw material contains a reduced iron compact made by compression-molding reduced iron. The auxiliary fuel contains powdered coal. The amount of reduced iron blended is at least 200 kg per ton of manufactured pig iron. The reducing agent ratio for reducing agents including the powdered coal and coke is 440 kg/tp or less, and the powdered coal ratio is 130 kg/tp or higher.
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Inventors:
MIYAGAWA KAZUYA
TADAI RIKIZO
KASAI AKITO
TAGAWA TOSHIFUMI
UCHIDA NAOYUKI
TADAI RIKIZO
KASAI AKITO
TAGAWA TOSHIFUMI
UCHIDA NAOYUKI
Application Number:
PCT/JP2022/038940
Publication Date:
March 07, 2024
Filing Date:
October 19, 2022
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C21B5/00
Domestic Patent References:
| WO2022049780A1 | 2022-03-10 | |||
| WO2014088031A1 | 2014-06-12 |
Foreign References:
| JP2009084688A | 2009-04-23 | |||
| KR20130053089A | 2013-05-23 |
Attorney, Agent or Firm:
IKEDA Yoshinori (JP)
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