Blast-furnace process with recycle of a CO-fraction of the blast furnace gas and production plant for same

• Main Authors: GRANT, MICHAEL G. K, DELEBECQUE, AUDE, TSIAVA, REMI, DEVAUX, MICHEL
• Format: Patent
• Language: English; French; German
• Published: 16.04.2014
• Subjects: BLASTING; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMBINED HEATING AND REFRIGERATION SYSTEMS; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FUELS; FURNACES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEAT PUMP SYSTEMS; HEATING; KILNS; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS; LUBRICANTS; MANUFACTURE OF IRON OR STEEL; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MIXTURES BY PRESSURE AND COLD TREATMENT; OVENS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLEGASES CONTAINING CARBON MONOXIDE; REFRIGERATION OR COOLING; RETORTS; SEPARATION; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS; WEAPONS

Process for producing metal from ore in a blast furnace and blast-furnace plant for use in said process, whereby oxygen is heated in an oxygen preheating installation upstream of the blast furnace and hot oxygen thus obtained is introduced into the blast furnace and whereby CO is extracted from the blast furnace gas to generate CO-fraction of the blast furnace gas and the CO-fraction thus obtained is likewise introduced into the blast furnace.