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云南省相当数量的铁锰矿选矿性能差，不能直接用于炼锰铁，金马冶炼厂成功地用铁锰矿炼出了富锰渣。
Yunnan Province, a considerable amount of iron ore beneficiation performance is poor, can not be directly used for refining ferromanganese, gold smelter successfully with manganese ore refining rich manganese residue.