鞍山某铁矿石磁选—反浮选试验研究

鞍山某铁矿石铁品位为32.19%，铁主要以磁铁矿及赤铁矿形式存在，主要脉石矿物为石英。针对该矿石采用磁选—反浮选原则流程进行试验研究，以期确定合理的工艺参数，为该类矿石资源的高效开发利用提供技术支撑。结果表明:原料在磨矿细度-0.045 mm含量为85%，弱磁选磁场磁感应强度为0.1 T，强磁选背景磁感应强度为0.5 T的条件下得到混合磁选精矿；再采用1次粗选1次精选3次扫选反浮选工艺，反浮选中抑制剂淀粉用量为320 g/t、活化剂氧化钙用量为500 g/t、油酸类捕收剂总用量为135 g/t（粗选为90 g/t和精选为45 g/t）；获得了铁品位为69.97%、回收率80.64%的铁精矿。 

Study on Magnetic Separation -Reverse Flotation Tests of the Iron Ore from Anshan

The iron content of an iron ore from Anshan is 32.19%. The iron minerals are mainly magnetite and hematite. The gangue minerals mainly include quartz. For this ore, the magnetic separation-reverse flotation tests were conducted for determining process parameters reasonably and guiding development and utilization of such ore. The test results indicated that the mixed magnetic concentrate was obtained with the grinding fineness under 0.045 mm of 85%, weak magnetic separation magnetic field magnetic induction intensity of 0.1 T, strong magnetic separation background magnetic induction intensity of 0.5 T. Then the process of one roughing, one cleaning and three scavenging flotation was adopted. The final iron concentrate with the grade of 69.97% and the recovery of 80.64% could be obtained under the conditions of the starch dosage of 320 g/t, the calcium oxide dosage of 500 g/t and the total oleate collector dosage of 135 g/t (90 g/t in roughing, 45 g/t in cleaning) in the reverse flotation.