METHOD FOR USING BIOMASS IN BLAST FURNACE

WIPO Patent Application WO/2011/052796

A1

Provided is a biomass using method capable of, when biomass is used as a blast furnace blowing material as a substitute for pulverized coal, increasing the flammability and heating value of the biomass to about the same level as those of the pulverized coal and capable of using conventional pulverized coal blowing equipment by enhancing the air transportability. A method for using biomass in a blast furnace is used, the method being characterized in that: biomass (A) is dried by distillation to manufacture biomass coal (D) showing a Hardgrove grindability index (HGI) of 45 or more; the biomass coal (D) is pulverized together with coal (B); and the pulverized powder is blown from a tuyere (15) as an auxiliary reducing material in a blast furnace (14). It is preferable that the biomass (A) is dried by distillation at 450 ˚C or higher for 30 minutes or longer to manufacture the biomass coal.

TSURUTA HIDEKAZU (JP)
ASANUMA MINORU (JP)
FUJIBAYASHI AKIO (JP)

PCT/JP2010/069641

May 05, 2011

October 28, 2010

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JFE STEEL CORP (JP)
TSURUTA HIDEKAZU (JP)
ASANUMA MINORU (JP)
FUJIBAYASHI AKIO (JP)

C21B5/00; B09B3/00; C10B53/02; C10L5/44

JP2009057438A

2009-03-19

SHIGERU UEDA ET AL.: "Control of Biomass Composition for Optimum Injection in Blast Furnace to Mitigate CO_2 Emission in Ironmaking Process", JOURNAL OF THE IRON & STEEL INSTITUTE OF JAPAN, vol. 94, no. 11, 1 November 2008 (2008-11-01), pages 468 - 474

OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)

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