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Title:
APPARATUS FOR PRODUCING DIRECT-REDUCED IRON AND METHOD OF PRODUCING DIRECT-REDUCED IRON
Document Type and Number:
Japanese Patent JP2014227588
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for producing direct-reduced iron which can effectively use fuel gas having low calorific value while reducing consumption of the fuel gas.SOLUTION: An apparatus 100 for producing direct-reduced iron includes: a direct-reducing furnace reducing iron oxide directly by making the iron oxide contact with reducing gas; and a circulation part 20 obtaining the reducing gas introduced into a direct-reducing furnace 30 directly by removing water and carbon dioxide from the exhaust gas from the direct-reducing furnace. The apparatus 100 for producing direct-reduced iron further includes: a heating furnace 40 heating the reducing gas by combusting fuel gas having a lower calorific value of 2.9-3.8 MJ/Nm; a first heat exchange part 13 preheating the fuel gas; and a second heat exchange part 15 preheating combustion air of the heating furnace 40 by heat of combustion exhaust gas.

Inventors:
ICHIKAWA HIROSHI
OSAWA YASUYUKI
Application Number:
JP2013110196A
Publication Date:
December 08, 2014
Filing Date:
May 24, 2013
Export Citation:
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Assignee:
NIPPON STEEL & SUMIKIN ENG CO
International Classes:
C21B13/02; F27D17/00
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Yasuki Ishizaka