METHOD FOR OPERATING BLAST FURNACE

WIPO Patent Application WO/2015/105107

A1

Provided is a method for operating a blast furnace which makes it possible to drastically reduce CO2 emissions, and to stably produce pig iron over the long term using a commercial blast furnace. A method for operating a blast furnace into which iron ore and coke are inserted from the blast furnace top, and into which pulverized coal is blown from an ordinary tuyere, the method for operating a blast furnace being characterized in that: a gas containing hydrogen and/or a hydrocarbon is blown in from the ordinary tuyere along with the pulverized coal; and carbon dioxide and water vapor are removed from the furnace-top exhaust gas of the blast furnace, and the furnace-top exhaust gas is then blown into the furnace from a shaft-section tuyere.

INADA TAKANOBU (JP)
SAKAI HIROSHI (JP)
UJISAWA YUTAKA (JP)

PCT/JP2015/050185

July 16, 2015

January 06, 2015

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NIPPON STEEL & SUMITOMO METAL CORP (JP)
JFE STEEL CORP (JP)
KOBE STEEL LTD (JP)
NISSHIN STEEL CO LTD (JP)
NIPPON STEEL & SUMIKIN ENG CO (JP)

C21B5/00; C21B5/06; F27D17/00

JP2009221547A	2009-10-01
JPS5232323B2	1977-08-20
JP2011225969A	2011-11-10
JP2013147692A	2013-08-01
JPH0586444B2	1993-12-13
JPS5232323B2	1977-08-20
JPH05179323A	1993-07-20
JPS6357704A	1988-03-12
JP2011225969A	2011-11-10

PETTRSSON MIKAEL; SILKSTROM PETER; EKLUND NICKLAS: "Final Evaluation of the Ulcos TGR-BF Pilot Tests Performed at the LKAB Experimental Blast", PROCEEDINGS OF 6TH ICSTI, 2012, pages 960
K. TAKATANI; T. INADA; Y. UJISAWA, ISIJ INTERNATIONAL, vol. 39, 1999, pages 15
See also references of EP 3093352A4

AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)

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