Dongbu Metal Co., Ltd.

Db Metal Co., Ltd.

Hai-Chang Cho

Young-eun Lee

Chan-Soo Park

Kwang-Jung Lee

Sung-Hwan Hong

Dong-Shik Min

Young-Eun Lee

Disclosed is a method of producing ultra low phosphorus and carbon ferromanganese having 0.1 wt % or less carbon and 0.03 wt % or less phosphorus. The method includes preparing low carbon silicomanganese having low phosphorus content, preparing molten manganese 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&#x2dc;72:28&#x2dc;30 in a ladle, thus producing a metal melt and slag, and subjecting the metal melt separated from the above slag and the molten manganese slag identical to that used in the primary mixing and stirring to secondary mixing and stirring, thus producing slag and a metal melt including 91&#x2dc;93 wt % manganese, 0.60&#x2dc;0.85 wt % silicon, 0.05&#x2dc;0.10 wt % carbon and 0.015&#x2dc;0.02 wt % phosphorus.

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

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Seoul, South Korea

Hai-Chang Cho