Beneficiation of unwieldy oolitic hematite by deep reduction and magnetic separation process

Based on the characteristics of some unwieldy oolitic hematite,experimental studies were done by deep reduction and magnetic separation method.The effects of experimental conditions,such as reduction temperature,reduction time,binary basicity,grinding fineness,and magnetic field intensity on the separation efficiency and product indexes were analyzed.The phase composition and characteristics of run-of-the-mine and products were determined by comprehensive methods such as optical microscopy,X-ray diffraction,SEM and chemical analysis.The reduction temperature,reduction time and binary basicity are 1 200 ℃,2 h and 0.2,respectively.The results show that the grade and the recovery of the iron ore concentrate are 91.94% and 95.85%,respectively,indicating that the obtained product is of high quality and of less harmful impurities.