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Title:
METHOD FOR PRODUCTION OF ASHLESS COAL
Document Type and Number:
WIPO Patent Application WO/2008/044728
Kind Code:
A1
Abstract:
Disclosed is a method for producing an ashless coal for use as a raw material coal for a coke for steelmaking. The method comprises: a slurry preparation step (S1) for mixing a solvent and a coal to prepare a slurry; an extraction step (S2) for extracting the slurry produced in the slurry preparation step (S1) at 400 to 420ºC for 20 minutes or shorter and then cooling the resulting product to 370ºC or lower; a separation step (S3) for separating theslurry produced in the extraction step (S2) into a liquid fraction and a non-liquid fraction; and an improved coal production step (S4) for separating the solvent from the liquid fraction obtained in the separation step (S3) to produce an improved coal, i.e., an ashless coal.

Inventors:
OKUYAMA, Noriyuki (())
奥山 憲幸 (())
TADA, Naoji (())
多田 直司 (())
Application Number:
JP2007/069833
Publication Date:
April 17, 2008
Filing Date:
October 11, 2007
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2丁目10番26号 Hyogo, 6518585, JP)
OKUYAMA, Noriyuki (())
奥山 憲幸 (())
TADA, Naoji (())
International Classes:
C10L5/00
Foreign References:
JP2005120185A2005-05-12
Other References:
OKUYAMA N. ET AL.: 'Kanzen Muhaitan (Hyper Coal) Seizo Process no Kaihatsu' R&D KOBE STEEL ENGINEERING REPORTS vol. 56, no. 2, 01 August 2006, pages 15 - 22, XP003021398
SHINOZAKI S. ET AL.: 'P12-11 Shin'nenryo 'Hyper Coal no Kaihatsu' to 'Gas Turbine eno Tekiyo Gijutsu Kaihatsu'' DAI 8 KAI DORYOKU.ENERGY GIJUTSU SYMPOSIUM KOEN RONBUNSHU 2002, pages 119 - 124, XP003021399
YOSHIDA T. ET AL.: 'Hyper Coal Seizo ni okeru Yuki Yobai Chushutsu Joken no Kento' MINING AND MINERALS vol. 118, no. 2, 2002, pages 136 - 140, XP003021400
Attorney, Agent or Firm:
ISONO, Michizo (Sabo Kaikan Annex7-4, Hirakawa-cho 2-chome, Chiyoda-ku Tokyo 93, 1020093, JP)
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