Title:
REDUCED IRON PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2024/057694
Kind Code:
A1
Abstract:
Provided is a reduced iron production method that can suppress clustering of iron ore pellets. A reduced iron production method according to the present invention is characterized by comprising: a pellet production step for mixing an iron ore powder, a binder, and an auxiliary material, granulating the mixture to obtain green pellets, and baking the green pellets to obtain iron ore pellets; and a reduction step for charging the iron ore pellets in a vertical shaft furnace, and directly reducing the same by using a reducing gas to obtain reduced iron pellets. The reduced iron production method is characterized in that: raw materials of the iron ore powder include an iron ore having a compositional makeup in which the total Fe amount is 63 mass% or less and the sum of SiO2 and Al2O3 is 4 mass% or more; and the reduced iron pellets satisfy the following formula. (SiO2+Al2O3+CaO+MgO+FeO)/M.Fe ≥ 0.15
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Inventors:
HORITA KENYA (JP)
HIGUCHI TAKAHIDE (JP)
IWAMI YUJI (JP)
TAKEHARA KENTA (JP)
NAKAMURA NAOTO (JP)
FUJIWARA SHOHEI (JP)
MORITA YUYA (JP)
HIGUCHI TAKAHIDE (JP)
IWAMI YUJI (JP)
TAKEHARA KENTA (JP)
NAKAMURA NAOTO (JP)
FUJIWARA SHOHEI (JP)
MORITA YUYA (JP)
Application Number:
PCT/JP2023/025631
Publication Date:
March 21, 2024
Filing Date:
July 11, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B13/02; C22B1/16
Domestic Patent References:
| WO2022264549A1 | 2022-12-22 |
Foreign References:
| JPS55113818A | 1980-09-02 | |||
| JP2002363624A | 2002-12-18 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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