Title:
METHOD FOR REDUCING FINE IRON ORE
Document Type and Number:
WIPO Patent Application WO/2023/162389
Kind Code:
A1
Abstract:
The present invention significantly reduces CO2 emission and enables stable operation regardless of fluctuations in various conditions, in a process for reducing fine iron ore by means of a fluidized-bed reduction furnace and a smelting reduction furnace. Provided is a method for reducing fine iron ore, the method comprising: a fluidized-bed reduction step in which fine iron ore is fluidized and reduced with a first reducing gas in a fluidized-bed reduction furnace to obtain partially-reduced iron; and a smelting reduction step in which the partially-reduced iron is reduced with a second reducing gas in a smelting reduction furnace, wherein the fluidized-bed reduction furnace top gas discharged from the top of the fluidized-bed reduction furnace is used for synthesizing methane and reforming methane-containing gas.
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Inventors:
NAKAHARA YOSHIKO (JP)
TERUI KOKI (JP)
OZAWA SUMITO (JP)
TERUI KOKI (JP)
OZAWA SUMITO (JP)
Application Number:
PCT/JP2022/044473
Publication Date:
August 31, 2023
Filing Date:
December 01, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B11/00; C21B13/00; C21B13/14; F27D17/00
Foreign References:
| JPS6220806A | 1987-01-29 | |||
| JPS60100635A | 1985-06-04 | |||
| JPS5832689A | 1983-02-25 | |||
| JPH04314808A | 1992-11-06 | |||
| JPS58174512A | 1983-10-13 | |||
| JPS6156216A | 1986-03-20 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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