Title:
METHOD FOR PRODUCING REDUCED IRON
Document Type and Number:
WIPO Patent Application WO/2021/230307
Kind Code:
A1
Abstract:
Provided is a method for producing reduced iron by reducing iron oxide charged in a shaft furnace, wherein a mixed gas containing a reducing gas and a nitrogen gas and heated to a predetermined temperature is blown into the shaft furnace, the reducing gas containing at least 90 vol% of hydrogen gas.
Inventors:
INADA TAKANOBU (JP)
MIZUTANI MORITOSHI (JP)
UJISAWA YUTAKA (JP)
MIZUTANI MORITOSHI (JP)
UJISAWA YUTAKA (JP)
Application Number:
PCT/JP2021/018156
Publication Date:
November 18, 2021
Filing Date:
May 13, 2021
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21B13/02; F27D17/00
Domestic Patent References:
| WO2019238720A1 | 2019-12-19 |
Foreign References:
| JPS4947208A | 1974-05-07 | |||
| US4363654A | 1982-12-14 | |||
| CN101787406A | 2010-07-28 | |||
| KR20120075201A | 2012-07-06 | |||
| JP2020085078A | 2020-06-04 | |||
| US20170239700A1 | 2017-08-24 | |||
| DE2422641A1 | 1974-12-05 | |||
| CN105219907A | 2016-01-06 |
Other References:
HARA ET AL., TETSU-TO-HAGANE, vol. 62, 1976, pages 315
YAMAOKA ET AL., TETSU-TO-HAGANE, vol. 74, 1988, pages 2254
See also references of EP 4151754A4
YAMAOKA ET AL., TETSU-TO-HAGANE, vol. 74, 1988, pages 2254
See also references of EP 4151754A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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