SHAFT FURNACE OPERATION METHOD AND REDUCE IRON PRODUCTION METHOD

WIPO Patent Application WO/2022/264666

A1

Provided is a shaft furnace operation method by which reduced iron can be produced using a shaft furnace while suppressing CO2 emissions and without preheating raw materials.　This shaft furnace operation method is for obtaining reduced iron by charging an agglomerated ore into a shaft furnace, introducing a reducing gas mainly comprising H2 into the shaft furnace, and reducing iron oxides contained in the agglomerated ore, said method involving blowing of an H2O-containing heated gas, which has been obtained by burning and heating H2 and O2 to a temperature of 800˚C or higher, into the shaft furnace from a position higher than the reducing gas introducing position in a height direction of the shaft furnace.

TERUI KOKI (JP)
MORIYA KOTA (JP)
OZAWA SUMITO (JP)

PCT/JP2022/017431

December 22, 2022

April 08, 2022

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JFE STEEL CORP (JP)

C21B13/02

JP2012102372A	2012-05-31
JPS4944926A	1974-04-27
CN112176144A	2021-01-05
JP5630222B2	2014-11-26

HIDEHO KUBO: "A Dynamic One-Dimensional Simulation Model of Blast Furnace Process", KAWASAKI STEEL GIHO, vol. 14, no. 2, 1982, pages 134 - 144
IWAO MUCHI: "Reaction Kinetics in the Blast Furnace", JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS, vol. 30, no. 9, 1966, pages 826 - 831
JUNICHIRO YAGI: "Application of the Reactions Concerning H and Steam and the Temperature of Top Gas to the Blast-Furnace Model", JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS, vol. 31, no. 6, 6 January 1997 (1997-01-06), pages 711 - 716

SUGIMURA Kenji (JP)

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