METHOD OF MELTING VANADIUM-CONTAINING STEEL IN ELECTRIC ARC FURNACES

FIELD: ferrous metallurgy, particularly, methods of melting of vanadium-containing steel in electric arc steel furnaces. SUBSTANCE: method includes charging of iron charge; melting of iron charge; oxidation of admixtures with vanadium and withdrawal of oxidizing slag; addition of slag-forming mixtur...

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Hauptverfasser:	MOGIL'NYJ V.V, SPIRIN S.A, OBSHAROV M.V, KOZYREVA O.A, DERJABIN A.A, LEBEDEV V.I, TSAREV V.F, KOZYREV N.A
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY METALLURGY OF IRON PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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Beschreibung
Zusammenfassung:	FIELD: ferrous metallurgy, particularly, methods of melting of vanadium-containing steel in electric arc steel furnaces. SUBSTANCE: method includes charging of iron charge; melting of iron charge; oxidation of admixtures with vanadium and withdrawal of oxidizing slag; addition of slag-forming mixture of vanadium converter slag, lime and fluorspar; preliminary deoxidation of metal in furnace; subsequent deoxidation of slag by addition of coke powder and ferrosilicon; tapping of metal and slag from furnace into ladle; final deoxidation of steel in ladle. Vanadium-containing slag, lime and fluorspar are added with their ratio in mixture of 1:(0.3-1.0):(0.2-0.4), respectively. After preliminary deoxidation of metal, slag in furnace is deoxidized with mixture of coke powder, crushed ferrosilicon and aluminum shot with ratio of C:Si:Al=1:(2.0-2.2):(1.5-1.6). First, tapped from furnace is slag and then metal. EFFECT: higher degree of assimilation of vanadium in direct alloying of steel with vanadium converter slag and stable withdrawal of vanadium into steel. 1 tbl