关键词: 鄂西鲕状赤铁矿石, 深度还原, 弱磁选, 还原剂

Abstract: Deep reduction and magnetic separation experiments on oolitic hematite for western Hubei province were investigated using coal from Songyuan of Jilin and coke from Ansteel as reductants respectively. Using coke as reductant，the performance indexes of the product，under the optimal process conditions of the reduction temperature for 1 250 ℃，the mole ratio of n(C)/n(O) for 3.5 and reduction time for 160 min and the grinding fineness of -200 mesh 88.92%，were described as follows: metallization rate being 90.50%，iron grade of concentrate reaching up to 96.47% and iron recovery reaching to 87.62%. Using coal as reductant，in the optimal conditions that the reduction temperature and the mole ratio of n(C)/n(O) were not changed and reduction time was 50 min with the grinding fineness of -200 mesh 84.45%，the metallization rate，iron grade of concentrate and iron recovery reached to 91.63%，96.07% and 88.54% respectively. The coal was more suitable to be used as the reductant of carbon-based reduction and magnetic separation process of an oolitic hematite from western Hubei province considering the process indexes，energy consumption and the cost of reductants.

Key words: Oolitic hematite, Deep reduction, Low intensity magnetic separation, Reductants