Title:
CO2の排出を規制した直接還元鉄の製造方法
Document Type and Number:
Japanese Patent JP2013501140
Kind Code:
A
Abstract:
Production method and apparatus for direct reduced iron (DRI), a.k.a sponge iron, by contacting iron oxides with recycled and regenerated hot reducing gases containing H2 & CO2. This invention decreases uncontained emission of CO2 to the atmosphere from combustion of carbon-bearing fuels in the reducing-gas heater by substituting, at least partially, a gas mainly comprising hydrogen in lieu of the usual carbon-bearing fuels. The hydrogen fuel stream, depleted of CO2 by means of a physical gas separation unit (which can be a PSA/VPSA type adsorption unit, a gas separation membrane unit or a combination of both such units) is derived from at least a portion of regenerated reducing gases being recycled to the reduction reactor. The derived hydrogen fuel stream is combusted in the reducing gas heater and/or other thermal equipment in the reduction plant, thus decreasing the CO2 emissions directly to the atmosphere.
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Inventors:
Dualte-Escaleno, Pablo Enrique
Sendejas-Martinez, Eugenio
Tavano andrea
Martinis Alessandro
Gaspera Omar della
Sendejas-Martinez, Eugenio
Tavano andrea
Martinis Alessandro
Gaspera Omar della
Application Number:
JP2012522264A
Publication Date:
January 10, 2013
Filing Date:
July 21, 2010
Export Citation:
Assignee:
H.W. Technologies, S.A. Decie V.
Danieli and Sea. Officine Meccaniche, Societa. Per. Ationi
Danieli and Sea. Officine Meccaniche, Societa. Per. Ationi
International Classes:
C21B13/02; B01D53/22; F27D17/00
Domestic Patent References:
| JPS57155308A | 1982-09-25 | |||
| JP2001520310A | 2001-10-30 | |||
| JPH04341509A | 1992-11-27 |
Foreign References:
| US20030047037A1 | 2003-03-13 | |||
| US5110350A | 1992-05-05 | |||
| WO2006135984A1 | 2006-12-28 |
Attorney, Agent or Firm:
Patent business corporation Matsubara and Muraki International Patent Office