METHOD FOR BLAST-FURNACE MELTING OF ZINC-CONTAINING BURDEN

FIELD: ferrous metallurgy, in particular, process for blast-furnace melting of zinc-containing burden. ^ SUBSTANCE: method involves removing zinc from furnace working space by forming buffer layer having predetermined height through charging of coke and crushed slag and periodically lowering burden...

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Bibliographische Detailangaben
Hauptverfasser:	POLJAKOV VITALIJ NIKOLAEVICH, FUKS VIKTOR LEONT'EVICH, KOZYREV NIKOLAJ ANATOL'EVICH, TOMSKIKH SERGEJ GENNAD'EVICH, PAVLOV VJACHESLAV VLADIMIROVICH, MORENKO ANDREJ VLADIMIROVICH, GODIK LEONID ALEKSANDROVICH, POLJAKOV NIKOLAJ SERAFIMOVICH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	CHEMISTRY MANUFACTURE OF IRON OR STEEL METALLURGY METALLURGY OF IRON
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Beschreibung
Zusammenfassung:	FIELD: ferrous metallurgy, in particular, process for blast-furnace melting of zinc-containing burden. ^ SUBSTANCE: method involves removing zinc from furnace working space by forming buffer layer having predetermined height through charging of coke and crushed slag and periodically lowering burden charge level; forming buffer layer from individual coke layer and crushed slag layer of fractions, respectively, (25-150):(40-150) mm, with weight ratio of components, respectively, (20-60):(150-300) kg/m3 of blast furnace; elevating temperature of blast furnace gas to 420-750 C, said process being carried out in 25-35 days; feeding blast-furnace gas cleaner sledges into separate sledge collector and providing natural settling of sledge during at least 3 days; pumping pulp of settled sledge; dehydrating and unloading dried sledge for zinc production. ^ EFFECT: reduced periodicity in repairing of blast furnace, reduced consumption of coke, and increased efficiency of blast furnace.