PRODUCTION METHOD FOR METAL IRON

WIPO Patent Application WO/2023/100707

A1

The present invention proposes a method for producing a metal iron having a low phosphorus concentration from a raw material containing iron oxide and phosphorus as components. This production method for a metal iron comprises a high-temperature reduction treatment step for heating a raw material containing oxides containing iron oxide and phosphorus as components, in a reducing gas atmosphere, to generate a metal iron obtained by reducing the iron oxide and a slag phase formed of oxides that have not been reduced and to cause the phosphorus to be contained in the slag phase. Preferably, the raw material is iron ore, or a component adjustment material-added iron ore obtained by adding and mixing a component adjustment material with iron ore, and the basicity of the raw material is at most 4.0. In the high-temperature reduction treatment step, preferably, the temperature and oxygen partial pressure fall within predetermined ranges, and the mixture after the reduction treatment is subjected to a pulverization and separation treatment or to a heating and dissolving treatment to separate the metal phase from the slag phase.

NAKASE KENJI (JP)
MINATANI KAZUYA (JP)
NAKAI YOSHIE (JP)
OKUYAMA GORO (JP)

PCT/JP2022/043012

June 08, 2023

November 21, 2022

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JFE STEEL CORP (JP)

C21B13/00; C21B3/06; C21C1/02; C22B5/12; C22B9/10

JP2010189762A	2010-09-02
JPH09256017A	1997-09-30
JP2009041107A	2009-02-26
JPS62230908A	1987-10-09
JPH01104708A	1989-04-21
JPS63223112A	1988-09-16

GINZA MARONIE P.C. (JP)

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