Process for production of ultra low phosphorous and carbon ferromanganese by using of ferromanganese slag

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.