PRODUCTION OF CR-CONTAINING MOLTEN IRON

PROBLEM TO BE SOLVED: To provide a producing method for shortening smelting time and enabling the increase of the producing quantity, at the time of producing a chromium-containing molten iron by executing a smelting reduction of a chromium oxide raw material. SOLUTION: This producing method is comp...

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Bibliographische Detailangaben
Hauptverfasser:	MIYATA YASUTO, WATANABE ATSUSHI, INOUE AKIHIKO, IZAWA TOMOO, TANO MANABU, KOMATANI AKINORI, TAKAOKA TOSHIO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY METALLURGY OF IRON PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a producing method for shortening smelting time and enabling the increase of the producing quantity, at the time of producing a chromium-containing molten iron by executing a smelting reduction of a chromium oxide raw material. SOLUTION: This producing method is composed of a smelting reduction period, in which the chromium oxide raw material, carbonaceous material and slag-making material are charged into a combination blown smelting furnace 1 and also, the smelting reduction of the chromium oxide raw material is executed by top-blowing gaseous oxygen, and a finish reduction period, in which the carbonaceous material is charged while holding the top-blown oxygen flow rate in the smelting reduction period, and also, a metal as the chromium source, a metal as a nickel source and one or more kinds among oxides as the nickel source are charged and melted.