Title:
IRON SOURCE PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/162728
Kind Code:
A1
Abstract:
A method for producing an iron source, comprising: a preparation step in which a mixture for roasting is prepared by mixing a raw material containing a phosphorus-containing iron ore and a flux; a roasting step in which the mixture for roasting is roasted to obtain a roasted product; a reduction step in which the roasted product is reduced in an atmosphere containing at least one of CO gas and hydrogen gas, to obtain a reduced product containing a reduced iron phase and a slag phase; a crushing step in which the reduced product is crushed to obtain a crushed product containing a reduced-iron-phase-containing product in which at least some of the slag phase constituting the reduced product has been separated; and a separation and recovery step in which the reduced-iron-phase-containing product is separated and recovered from the crushed product. In the method for producing an iron source, the flux contains a predetermined compound and the average particle size of the flux is greater than the average particle size of the iron ore.
Inventors:
ADACHI TAKERO
YAMAZAKI SHINTARO
TSUSHIMA TAKASHI
MURAKAMI TAICHI (JP)
YAMAZAKI SHINTARO
TSUSHIMA TAKASHI
MURAKAMI TAICHI (JP)
Application Number:
PCT/JP2023/004637
Publication Date:
August 31, 2023
Filing Date:
February 10, 2023
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
UNIV TOHOKU (JP)
UNIV TOHOKU (JP)
International Classes:
C21B13/00; C22B1/02; C22B5/12
Domestic Patent References:
| WO2018186066A1 | 2018-10-11 |
Foreign References:
| CN113403471A | 2021-09-17 | |||
| CN104451016A | 2015-03-25 | |||
| JPS53103915A | 1978-09-09 |
Other References:
MARUOKA NOBUHIRO, KUBO HIRONARI: "Enrichment of Phosphorus from Iron Ore to Dicalcium-silicate Phase by Partial Reduction", TETSU TO HAGANE: JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, IRON AND STEEL INSTITUTE OF JAPAN. TOKYO., JP, vol. 107, no. 6, 1 January 2021 (2021-01-01), JP , pages 527 - 533, XP093085719, ISSN: 0021-1575, DOI: 10.2355/tetsutohagane.TETSU-2020-082
Attorney, Agent or Firm:
YAMAO, Norihito (JP)
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