Method for the simultaneous production of iron and a crude...

C - Chemistry – Metallurgy – 21 – B

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C21B 5/00 (2006.01) C21B 7/00 (2006.01)

Patent

CA 2762373

The invention relates to a method for simultaneously producing iron and a crude syngas containing CO and H2 by means of a blast furnace that is charged with iron ore and carbon-containing reducing agents. The amount of carbon-containing reducing agents fed to the blast furnace is greater than the amount of fuel required for producing the iron. Technically pure oxygen is fed into the blast furnace for the blast furnace process and for producing the crude syngas. In addition, CO2 and/or steam are fed to the blast furnace in order to control the ratio between CO and H2 in the crude syngas discharged from the blast furnace as top gas and/or moderate the temperature at which the oxygen is injected.

La présente invention concerne un procédé permettant de produire simultanément du fer et un gaz de synthèse brut contenant CO et H2, par utilisation d'un haut fourneau qui est alimenté en minerais de fer et agents réducteurs contenant du carbone, la quantité d'agents réducteurs contenant du carbone qui alimente le haut fourneau étant supérieure à la quantité de combustible nécessaire à la production de fer. De l'oxygène industriel pur est introduit dans le haut fourneau afin de le faire fonctionner et de produire le gaz de synthèse brut. Du CO2 et/ou de la vapeur d'eau sont en outre introduits dans le haut fourneau afin de réguler le rapport CO/H2 du gaz de synthèse brut qui quitte le haut fourneau sous la forme de gaz de haut fourneau et/ou afin de modérer la température d'insufflation de la buse d'entrée d'oxygène.

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