METHOD FOR REFINING COPPER

PROBLEM TO BE SOLVED: To provide a method for refining copper capable of reutilizing converter slag containing free CaO more than the conventional technique at a high concentration without increasing a slag volume.SOLUTION: Provided is a method for refining steel characterized in that, when a molten...

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Bibliographische Detailangaben
Hauptverfasser:	OYAMA TOMOJI, TANAKA HIDESHIGE, KUBOTA TOMOYOSHI, KAMEDA SUMIHIRO
Format:	Patent
Sprache:	eng ; jpn
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:	PROBLEM TO BE SOLVED: To provide a method for refining copper capable of reutilizing converter slag containing free CaO more than the conventional technique at a high concentration without increasing a slag volume.SOLUTION: Provided is a method for refining steel characterized in that, when a molten iron is subjected to decarburization blowing to produce a molten steel, to a charge in which refining is performed, preferably, at a tapping temperature of 1,660°C or lower, with a converter slag having a POconcentration of 3 mass% or lower generated by the decarburization blowing, it is charged to the converter by above 10 kg for 1 t of the molten iron.SELECTED DRAWING: Figure 1 【課題】フリーＣａＯを高濃度で含有する転炉スラグを、スラグボリュームを増加することなく、従来技術よりも増して再利用することができる鋼の溶製方法を提案する。【解決手段】転炉で溶銑を脱炭吹錬して溶鋼を製造する際、好ましくは出鋼温度を１６６０℃以下として溶製するチャージに対して、脱炭吹錬で発生したＰ２Ｏ５濃度が３ｍａｓｓ％以下の転炉スラグを造滓材として上記転炉に溶銑１ｔあたり１０ｋｇ超え投入することを特徴とする鋼の溶製方法。【選択図】図１