Patent ID: 8268036
Filing Date: 2012-09-18
Classification: C21C,C22B,C22C,Y02P

Abstract:
1. A method of producing ultralow phosphorus and carbon ferromanganese, comprising: preparing low carbon silicomanganese having low phosphorus content; preparing a first molten manganese slag composed mainly of high carbon ferromanganese slag; subjecting the molten manganese slag and the low carbon silicomanganese having low phosphorus content to primary mixing and stirring at a ratio of 70˜72:28˜30 in a ladle, thus producing separated metal melt and slag; providing a second molten manganese slag composed mainly of high carbon ferromanganese slag; and subjecting the metal melt separated from the slag produced in the primary mixing and stirring and the second molten manganese slag to secondary mixing and stirring, thus producing a second slag and a metal melt comprising 91˜93 wt % manganese, 0.60˜0.85 wt % silicon, 0.05˜0.10 wt % carbon and 0.015˜0.02 wt % phosphorus.