Method and device for producing liquid pig iron or liquid steel precursor products

• Main Authors: SCHENK JOHANNES LEOPOLD, SCHMIDT MARTIN, WURM JOHANN, AICHINGER GEORG, HECKMANN HADO, MILLNER ROBERT, EDER THOMAS, WIEDER KURT
• Format: Patent
• Language: Chinese; English
• Published: 11.05.2011
• Subjects: BLASTING; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE; FURNACES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; KILNS; LIGHTING; MANUFACTURE OF IRON OR STEEL; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; OVENS; RETORTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

A method and a device are claimed for producing liquid pig iron or liquid steel precursor products made of ingredients composed of iron ores and additives thereto, wherein the ingredients are subjected to ongoing reduction in a reduction zone (1) and then fed to a melt zone or a melt system (2), in particular a melter gasifier, for melting with the addition of carbonaceous substrates and oxygen-containing gas, thereby forming a solid bed, wherein a CO and H2-containing reduction gas is formed that is introduced to the reduction zone (1), reacted there and discharged as a top gas. The method and the device provide that the hot, solid-laden top gas, after the solids are separated, is subjected to at least a dry coarse separation (5) and at least parts of the hot solids separated by the separation are returned to the melt zone or melt system (2) or the reduction system (1). In addition, the top gas is treated in a further fine separation stage (13A).