Beneficiation of Low-grade Iron Ore Fines by Using a Circulating-type Air Classifier

The current beneficiation study examines the potential for separating ultrafine low-grade iron ore materials using a circulating-type air classifier. Statistical analysis using Response Surface Methodology (RSM) was implemented for optimization of the separator critical processing parameters to achieve sharp separation at a cut size as fine as 20–38 µm. Results demonstrated that it was possible to achieve a separation of about 9.21% lean grade ultrafine content with a size cut of ~d50 20 µm through a single-stage application.