Title:
CIRCULATING REDUCTION SYSTEM, IRON ORE REDUCTION METHOD, AND BLAST FURNACE OPERATION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/048423
Kind Code:
A1
Abstract:
Provided is a circulating reduction system with which it is possible to efficiently circulate and utilize, as a reduction gas, a CO-rich gas obtained by reforming an exhaust gas that contains CO2 generated in a reduction furnace. In this circulating reduction system 100, an exhaust gas that contains CO2 generated in a reduction furnace 10 is recovered via first piping 81, and hydrogen gas is added to the exhaust gas from a hydrogen gas supply device 30 to produce a hydrogen-added gas. In a catalyst device 40, the CO2 in the hydrogen-added gas is converted to CO through a reverse water gas shift reaction, and a CO-rich gas in which the CO concentration is increased. The CO-rich gas is fed through second piping 82 into the reduction furnace 10 as a reduction gas. No separation device for separating, and recovering or removing, a specific gas component that is not water vapor from a gas passing through the first piping 81 and the second piping 82 is provided partway along the first piping 81 or the second piping 82.
Inventors:
NORO HISATO (JP)
SEGAWA HIROSHI (JP)
KUBO TAKAYA (JP)
SEGAWA HIROSHI (JP)
KUBO TAKAYA (JP)
Application Number:
PCT/JP2023/030590
Publication Date:
March 07, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
JFE MINERAL & ALLOY COMPANY LTD (JP)
International Classes:
C21B5/06; C21B5/00; C21B11/00
Foreign References:
| JP6843490B1 | 2021-03-17 | |||
| CN106399617A | 2017-02-15 | |||
| JPH09100108A | 1997-04-15 | |||
| JP2016524654A | 2016-08-18 | |||
| US4265868A | 1981-05-05 | |||
| JP2012072473A | 2012-04-12 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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