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Title:
METHOD FOR MANUFACTURING PIG IRON
Document Type and Number:
WIPO Patent Application WO/2009/145348
Kind Code:
A1
Abstract:
A method for producing pig iron by using high zinc-content iron ore includes steps of producing blast furnace feed (2) by using the high zinc-content iron ore containing 0.01 mass% or more zinc and 50 mass% or more iron, producing the pig iron by placing the blast furnace feed (2) into a blast furnace (1) and recovering zinc-containing dust (4) contained in exhaust gas from the blast furnace, and recovering the zinc (6) from the zinc-containing dust (4) by using a reducing furnace (5). It is preferable that a material in which the zinc-containing dust (4) and a component adjusting material are mixed is loaded onto a movable hearth, and the mixed material is reduced by being subjected to heat supplied from a top of the movable hearth to produce reduced iron (7) and recover the zinc (6).

Inventors:
ISHIWATA, Natuki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
石渡夏生 (〒11 東京都千代田区内幸町二丁目2番3号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
HIROHA, Hiroyuki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
広羽弘行 (〒11 東京都千代田区内幸町二丁目2番3号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
Application Number:
JP2009/060101
Publication Date:
December 03, 2009
Filing Date:
May 27, 2009
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
JFEスチール株式会社 (〒11 東京都千代田区内幸町二丁目2番3号 Tokyo, 〒1000011, JP)
ISHIWATA, Natuki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
石渡夏生 (〒11 東京都千代田区内幸町二丁目2番3号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
HIROHA, Hiroyuki (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
International Classes:
C21B5/00; C21B13/10; C22B1/16; C22B7/00; C22B7/02; C22B19/34
Foreign References:
JPS6465212A1989-03-10
JPH11241125A1999-09-07
JP2005089794A2005-04-07
Other References:
RYUKICHI HASHIGUCHI KINZOKU KOGAKU KOZA 4 SEIREN HEN III SEISEN-SEIKO 30 March 1969, pages 84 - 88
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JFE Techno-Research Corporation 7th Floor, Yanagiya Building, 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, 〒1030027, JP)
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