The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2015
Filed:
Jul. 21, 2010
Pablo Enrique Duarte-escareño, Monterrey, MX;
Eugenio Zendejas-martinez, Monterrey, MK;
Andrea Tavano, Tavagnacco, IT;
Alessandro Martinis, Pozzuolo del Friuli, IT;
Omar Della Gaspera, Fontanafredda, IT;
Pablo Enrique Duarte-Escareño, Monterrey, MX;
Eugenio Zendejas-Martinez, Monterrey, MK;
Andrea Tavano, Tavagnacco, IT;
Alessandro Martinis, Pozzuolo del Friuli, IT;
Omar Della Gaspera, Fontanafredda, IT;
HYL Technologies, S.A. DE C.V., San Nicolas de los Garza, NL, MX;
Danieli & C. Officine Meccaniche, S.p.A., Buttrio, UD, IT;
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 H& CO. This invention decreases uncontained emission of COto 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 COby 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 COemissions directly to the atmosphere.