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Title:
METHOD FOR PRODUCING PIG IRON, AND BLAST FURNACE TO BE USED THEREFOR
Document Type and Number:
WIPO Patent Application WO/2014/027481
Kind Code:
A1
Abstract:
Provided is a blast furnace capable of reducing the production costs of pig iron, and suppressing the adhesion of blast-furnace-blowing-coal ash and blockages caused by blast-furnace-blowing-coal ash along the path of the blast-furnace blowing coal to the interior of the blast-furnace body. A blast furnace (100) is equipped with: a blast-furnace body (110); material-insertion means (111-113) for inserting a material (1) containing iron ore and coal into the interior of the blast-furnace body from the top section thereof; hot-air blowing means (114, 115) for blowing hot air (101) into the interior of the blast-furnace body through the tuyere thereof; and blast-furnace-blowing-coal supply means (120-129) for blowing blast-furnace-blowing coal (11) into the interior of the blast-furnace body through the tuyere thereof. Therein, the blast-furnace-blowing-coal supply means blow a blast-furnace blowing coal having the proportion of oxygen atoms contained therein (dry base) set to 10-20 wt%, and the average pore diameter set to 10-50nm, while the hot-air blowing means measure the melting point of the ash in the material in advance, and blow hot air which is 100-150°C lower than the melting point of the ash.

Inventors:
OMOTO, Setsuo (16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
NAKAGAWA, Keiichi (16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
HAMADA, Tsutomu (16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
SAKAGUCHI, Masakazu (16-5, Konan 2-chome, Minato-k, Tokyo 15, 〒1088215, JP)
Application Number:
JP2013/062157
Publication Date:
February 20, 2014
Filing Date:
April 25, 2013
Export Citation:
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Assignee:
MITSUBISHI HEAVY INDUSTRIES, LTD. (16-5, Konan 2-chome Minato-k, Tokyo 15, 〒1088215, JP)
International Classes:
C21B5/00; C21B7/00
Foreign References:
JP2011102439A2011-05-26
JP2007169750A2007-07-05
JPH09263807A1997-10-07
Attorney, Agent or Firm:
MITSUISHI, Toshiro et al. (Mitsuishi Law and Patent Office, 9-15 Akasaka 1-chome, Minato-k, Tokyo 52, 〒1070052, JP)
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