Abstract
Permanent magnets (PM) are critical components for electric motors and power generators. Non-rare earth (non-RE) PMs typically have small supply risks and low cost compared to rare earth element (REE) PMs. There is a try to purify super high-grade magnetic concentrate to prepare raw materials for ferrite magnetFerrite magnet of non-RE PMs. Beneficiation of a high-grade (68%) ironIron ore concentrate was investigated by combination of the low-intensity magnetic separationMagnetic separation and reverse flotation methods. The granulometric composition was determined by laser particle sizeParticle size analyzer. Element analysis was assessed by semiquantitative XRF analysis, and mineralogical composition was evaluated by powder X-ray diffraction. The effects of the magnetic field intensity during magnetic separationMagnetic separation were investigated on the performance of the wet low-intensity magnetic separationMagnetic separation (WLIMS). The optimum flotation conditions of starch as depressant were determined. With the combination of magnetic separationMagnetic separation and reverse flotation separationReverse flotation separation , product of >72% Fe and <0.2% silicate grade was produced for preparing ferrite magnetFerrite magnet .
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