粒子状酸素含有鉱石の間接還元方法及び装置

Japanese Patent JP2004501283

A

In a process for the gas reduction of particulate oxide-containing ores, in particular iron-oxide-containing material, in the fluidized-bed process at a pressure of <5 bars, wherein the ore by aid of a reducing gas produced from coal is heated, optionally also pre-reduced, in a fluidized-bed reactor ( 1 ) designed as a pre-heating stage ( 5 ), subsequently is reduced to sponge iron in at least one fluidized-bed reactor ( 2, 3 ) designed as a reduction stage ( 7, 8 ), the reducing gas via a reducing-gas feed duct ( 12 ) or reducing-gas duct ( 13 ) being conducted from the reduction stage ( 7, 8 ) to the pre-heating stage ( 5 ) in the opposite direction of the material to be reduced and conducted from stage to stage, and being drawn off as an export gas after purification, heat is supplied to the reducing gas fed to the reduction stage ( 7, 8 ) and/or pre-heating stage ( 5 ), namely by combustion, together with oxygen and/or air, of a portion of the reducing gas provided for the gas reduction in the reduction stage ( 7, 8 ) and/or the pre-heating stage ( 5 ).

Leopold Werner Keplinger
Franz Hautzenberger
Johannes Schenck
Sang Hoon Ju

JP2002506256A

January 15, 2004

June 27, 2001

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Voest Arpine Industrie Unragenbau Gaem Behr und Ko
Pohan Iron and Steel Company Limited
Research Institute of Industrial Science and Technology Incorporated Foundation

B28B11/24; B28B13/04; C21B13/00; C21B13/14; C22B5/14; F27D17/00; F27B15/00; (IPC1-7): C21B13/00; F27D17/00

JPH06340909A

1994-12-13

WO1999032668A1	1999-07-01
WO2000034531A1	2000-06-15

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama
Shinya Mitsuhiro

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