METHOD FOR DEPHOSPHORIZING MOLTEN IRON

PROBLEM TO BE SOLVED: To provide a method for dephosphorizing molten iron by which the sticking and the growth of slag on the inner surface of refractory at a free- board part in a reaction vessel are restrained. SOLUTION: In the dephosphorizing treatment of the molten iron performed by using a deph...

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Bibliographische Detailangaben
Hauptverfasser:	SAKAGUCHI KIYONOBU, HOSHIKAWA IKUO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY METALLURGY METALLURGY OF IRON PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for dephosphorizing molten iron by which the sticking and the growth of slag on the inner surface of refractory at a free- board part in a reaction vessel are restrained. SOLUTION: In the dephosphorizing treatment of the molten iron performed by using a dephosphorizing agent >=25 mass% of the total CaO of which is replaced with CaO in the converter slag and an oxidizing agent, the liquid-phase ratio of the slag in the reaction vessel is held to =80 mass% at least in a period of >=80% for performing the dephosphorizing treatment.