METHOD FOR MELTING COLD IRON SOURCE

PROBLEM TO BE SOLVED: To reduce the unit power consumption and to efficiently melt cold iron source, when the molten iron is produced by blending direct reduced iron such as DRI, HBI, etc., at a high blending ratio of >=50%, in an arc-melting facility having a shaft type preheating chamber direct...

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Bibliographische Detailangaben
Hauptverfasser:	MIZUKAMI HIDEAKI, YAMAGUCHI RYUJI
Format:	Patent
Sprache:	eng
Schlagworte:	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 FERROUS OR NON-FERROUS ALLOYS FURNACES GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING KILNS LIGHTING MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OVENS PRETREATMENT OF RAW MATERIALS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL PRODUCTION AND REFINING OF METALS RETORTS 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 TREATMENT OF ALLOYS OR NON-FERROUS METALS WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To reduce the unit power consumption and to efficiently melt cold iron source, when the molten iron is produced by blending direct reduced iron such as DRI, HBI, etc., at a high blending ratio of >=50%, in an arc-melting facility having a shaft type preheating chamber directly connected with a melting chamber. SOLUTION: In a method for melting the preheated cold iron source in the melting chamber by using the arc-melting facility 1 having the melting chamber 3 and the shaft type preheating chamber 4 directly connected with the upper part of the melting chamber and preheating the cold iron source 16 blending the direct reduced iron at >=50%, while controlling the preheating temperature of the cold iron source in the preheating chamber to not higher than a prescribed temperature by introducing a part of exhaust gas generated in the melting chamber into the preheating chamber, the cold iron source in the melting chamber is melted with the arc while continuously or intermittently supplying the cold iron source into the preheating chamber so that the cold iron source holds the continued state in the preheating chamber and the melting chamber. At the point of time when a prescribed quantity of the molten metal 17 is stored in the melting chamber, the molten metal is tapped off in the continued state of the cold iron source in the melting chamber and the preheating chamber.