Title:
METHOD FOR PRODUCING REDUCED IRON
Document Type and Number:
WIPO Patent Application WO/2015/005187
Kind Code:
A1
Abstract:
Provided is a method for producing reduced iron by heating an agglomerated material comprising a substance containing iron oxide and a carbonaceous reducing agent in a shifting furnace hearth-type heating furnace, said method enabling the production of reduced iron while preventing the occurrence of the explosion of the agglomerated material upon heating.
An agglomerated material fulfilling any one of the requirements mentioned in items (A) to (C) below is used: (A) an agglomerated material in which the molar ratio of the amount (mol) of Cl contained in the agglomerated material to the sum total of the amounts (mol) of K2O and Na2O contained in the agglomerated material (i.e., [Cl/(K2O+Na2O)]) and the amount (mass%) of CaO contained in the agglomerated material satisfy a predetermined relationship; (B) an agglomerated material in which the above-mentioned molar ratio [Cl/(K2O+Na2O)] and the amount (mass%) of CaO contained in the agglomerated material satisfy a predetermined relationship and the degree of basicity (CaO/SiO2), which is calculated from the amounts (mass%) of CaO and SiO2 contained in the agglomerated material, is 0.30 or more and less than 1.30; and (C) an agglomerated material in which the above-mentioned molar ratio [Cl/(K2O+Na2O)] and the amount (mass%) of CaO contained in the agglomerated material satisfy a predetermined relationship and the amount of volatile carbon contained in the agglomerated material is less than 1.70 mass%.
Inventors:
TSUTSUMI HIROFUMI
TAGA TOSHIHARU
MIZUTANI NORIAKI
SUGIYAMA TAKESHI
TAGA TOSHIHARU
MIZUTANI NORIAKI
SUGIYAMA TAKESHI
Application Number:
PCT/JP2014/067628
Publication Date:
January 15, 2015
Filing Date:
July 02, 2014
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C21B13/10; C22B1/16
Foreign References:
| JP2010248622A | 2010-11-04 | |||
| JPS5120368B2 | 1976-06-24 | |||
| JP2005200672A | 2005-07-28 |
Other References:
YASUNORI NISHIKAWA ET AL.: "Reduction of platelet Fe203 single crystal reacted with Na20, K20, CaO and silicate slag at the surface of Fe203 c plane", REPORTS OF THE GOVERNMENT INDUSTRIAL DEVELOPMENT LABORATORY, HOKKAIDO, March 1986 (1986-03-01), pages 94 - 108
Attorney, Agent or Firm:
UEKI, Kyuichi et al. (JP)
Hisakazu Ueki (JP)
Hisakazu Ueki (JP)
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