SMELTING METHOD OF RAIL STEEL

FIELD: metallurgy. ^ SUBSTANCE: invention concerns ferrous metallurgy. Particularly it concerns smelting methods of rail steel in arc electro steel-smelting furnace. Method includes smelting of steel by series with feeding into furnace of scrap metal and liquid cast iron, melting, oxidising period w...

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Hauptverfasser:	KOZYREV NIKOLAJ ANATOL'EVICH, OBSHAROV MIKHAIL VLADIMIROVICH, ALEKSANDROV IGOR' VIKTOROVICH, PAVLOV VJACHESLAV VLADIMIROVICH, GODIK LEONID ALEKSANDROVICH
Format:	Patent
Sprache:	eng ; rus
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: metallurgy. ^ SUBSTANCE: invention concerns ferrous metallurgy. Particularly it concerns smelting methods of rail steel in arc electro steel-smelting furnace. Method includes smelting of steel by series with feeding into furnace of scrap metal and liquid cast iron, melting, oxidising period with usage of oxygen gas, tapping with leaving of slag and part of metal in furnace, ladle addition during tapping of solid slag-forming mixture, deoxidiser and alloyings. Steel lancing by oxygen gas is implemented with intensity 80-120 nm3/h per ton of smelted steel. Before steel discharge from furnace during 0.5-4 min it is implemented insufflation of carbon-bearing material with consumption 15-100 kg/min. ^ EFFECT: improving of smelted steel, reduce flow of ferroalloys, alloying and oxygen gas, reduce flow of metallic charge and increase resistance of furnace brickwork.