... ,Niobium and tantalum,Rare earth,Industrial minerals,Heavy mineral sands,Garnet,Phosphate,Heavy media separation,Recycling.Introduction ... the gravity separation.Removing iron impurities from non-metallic mineral raw materials, iron removing can protect crushers and ... equipment,the iron removing is very commen during nonmetallic mineral processing. Kyanite, quartz, red tourmaline, feldspar, nepheline ...