METHOD FOR RECOVERING MANGANESE AND PHOSPHORUS FROM MOLTEN IRON

PROBLEM TO BE SOLVED: To obtain a method for recovering Mn and P from molten iron. SOLUTION: The molten iron is treated by the following stages 1 to 4. 1. The slag basicity of the molten iron thickened in P and Mn by a dephosphorization regenerating treatment of steel making slag is specified to 1.0...

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Bibliographische Detailangaben
Hauptverfasser:	IKEMIYA HIROYUKI, TSUDA MASAHITO, SHIROTA YOSHIYASU
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 obtain a method for recovering Mn and P from molten iron. SOLUTION: The molten iron is treated by the following stages 1 to 4. 1. The slag basicity of the molten iron thickened in P and Mn by a dephosphorization regenerating treatment of steel making slag is specified to 1.0 to 2.0 and the Mn in the molten iron is oxidized at 1450 to 1650 deg.C. 2. The Mg-contg. slag generated by the above is used as a raw material for sintered ore or the auxiliary raw material for a steel making furnace. 3. Further, the slag basicity of the molten iron lowered in the Mn is specified to >=2.0 to oxide the P in the molten iron at 1300 to 1450 deg.C. 4. The P-contg. slag generated by the above is discarded or effectively utilized. As a result, the Mn and P are separately recovered by stages and are respectively effectively utilized. The amt. of the dephosphorized slag is decreased in the case this slag is discarded.