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Title:
APPARATUS AND METHOD FOR PRODUCING REDUCED IRON USING ALKALI-CONTAINING IRON PRODUCTION DUST AS THE RAW MATERIAL
Document Type and Number:
WIPO Patent Application WO/2011/010669
Kind Code:
A1
Abstract:
Provided is a movable hearth furnace for thoroughly removing alkali metal elements and producing high-strength reduced iron when producing reduced iron using iron production dust containing alkali metal elements in a movable hearth furnace. The movable hearth furnace comprises: a reduction zone for heating and reducing a carbon composite briquette (C) to produce a reduced briquette (D) having an iron metallization rate of 80% or greater; an alkali removal zone, disposed after the reduction zone, for heating the reduced briquette in a reducing atmosphere and removing the alkali metal elements from the reduced briquette to obtain an alkali-free reduced briquette; and a strengthening zone, disposed after the alkali removal zone, for heating the alkali-free reduced briquette in an oxidizing atmosphere and raising the crushing strength of the alkali-free reduced briquette to produce reduced iron product.

Inventors:
SUGIYAMA Takeshi (())
杉山 健 (())
YOSHIDA Shohei (())
吉田 昌平 (())
Application Number:
JP2010/062256
Publication Date:
January 27, 2011
Filing Date:
July 21, 2010
Export Citation:
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Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO (10-26, Wakinohama-cho 2-chome Chuo-ku, Kobe-sh, Hyogo 85, 〒6518585, JP)
株式会社神戸製鋼所 (〒85 兵庫県神戸市中央区脇浜町二丁目10番26号 Hyogo, 〒6518585, JP)
SUGIYAMA Takeshi (())
杉山 健 (())
YOSHIDA Shohei (())
International Classes:
C21B13/10; C22B1/16
Domestic Patent References:
WO2009035053A1
Foreign References:
JPH11310832A
JP2002097508A
US3836353A
JP2008056986A
JP2000034526A
JP2006283136A
JP2003293019A
JP2003293020A
JP2009052141A
JP2003129142A
JP2004256868A
JPH11217615A
JP2009007667A
JP2009169718A
Attorney, Agent or Firm:
OGURI Shohei et al. (Eikoh Patent Firm, Toranomon East Bldg. 10F 7-13, Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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