Title:
AGGLOMERATED ORE ASSESSING METHOD AND AGGLOMERATED ORE
Document Type and Number:
WIPO Patent Application WO/2022/264549
Kind Code:
A1
Abstract:
Provided is an agglomerated ore assessing method that enables assessment of clustering of reduced iron while taking into consideration the thermal compensation attributed to sensible heat in blown air when reduction is performed at a high hydrogen concentration. The present invention involves: producing a post-reduction aggregate by reducing an agglomerated ore at 1000-1200°C while applying a predetermined load thereon; performing a rotation process on the post-reduction aggregate by using a rotation testing machine; measuring a cluster strength CS of the post-reduction aggregate as calculated by formula (1); and assessing the clustering characteristics of the agglomerated ore by using the cluster strength CS. (1): CS=(W'/W)×100, wherein CS represents the cluster strength (mass %), W represents the mass (g) of the post-reduction aggregate having a particle size equal to or more than the maximum particle size of the agglomerated ore, and W' represents the mass (g) of the post-reduction aggregate obtained after the rotation process using the rotation testing machine and having a particle size equal to or more than the maximum particle size of the agglomerated ore.
More Like This:
Inventors:
MORITA YUYA (JP)
HIGUCHI TAKAHIDE (JP)
YAMAMOTO TETSUYA (JP)
HIROSAWA TOSHIYUKI (JP)
IWAMI YUJI (JP)
HORITA KENYA (JP)
FUJIWARA SHOHEI (JP)
TAKEHARA KENTA (JP)
IGAWA DAISUKE (JP)
HIGUCHI TAKAHIDE (JP)
YAMAMOTO TETSUYA (JP)
HIROSAWA TOSHIYUKI (JP)
IWAMI YUJI (JP)
HORITA KENYA (JP)
FUJIWARA SHOHEI (JP)
TAKEHARA KENTA (JP)
IGAWA DAISUKE (JP)
Application Number:
PCT/JP2022/010210
Publication Date:
December 22, 2022
Filing Date:
March 09, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21B13/02; C22B1/16
Domestic Patent References:
| WO2015016145A1 | 2015-02-05 |
Foreign References:
| US20180320246A1 | 2018-11-08 | |||
| JP2014037575A | 2014-02-27 |
Other References:
L. LUJ. PAND. ZHU: "Iron Ore", ELSEVIER LTD., article "Quality requirements of iron ore for iron production", pages: 475 - 504
DENTARO KANEKO: "Clustering Phenomena during Iron Oxide Reduction in Shaft Furnace", TETSU-TO-HAGANE, THE 64TH YEAR, no. 6, 1978, pages 681 - 690
DENTARO KANEKO: "Clustering Phenomena during Iron Oxide Reduction in Shaft Furnace", TETSU-TO-HAGANE, THE 64TH YEAR, no. 6, 1978, pages 681 - 690
Attorney, Agent or Firm:
GINZA MARONIE P.C. (JP)
Download PDF: