The Baotou iron ore is complex ore that contains iron, rare-earth elements, fluorine, potassium and sodium.
包头矿是一种复合矿，它含有铁、稀土和氟、钾、钠等元素。
Separation of copper, zinc and sulphur complex ore has been a difficult problem in the mineral processing field.
前言：铜锌硫多金属矿石分离一直是选矿界的难题。
Separation of copper, zinc and sulphur complex ore has been a difficult problem in the mineral processing field.
前言：铜锌硫多金属矿石分离一直是选矿界的难题。
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