Experimental Study on the Recovering Ilmenite from Iron Tailings in Panzhihua-Xichang Area by High Gradient Magnetic Separator with a Horizontal Magnetic System
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摘要: 攀西某选厂采用“强磁—强磁—浮选”作为钛铁矿选别原则流程，强磁工序精矿作业回收率是影响钛铁矿总回收率的关键。试验研究以选铁尾矿经浓缩分级后的粗粒物料为原料，分别采用水平磁系高梯度磁选机和垂直磁系高梯度磁选机对其中钛铁矿进行回收。结果表明，在最优条件参数下，采用两种磁选机获得的精矿TiO2回收率接近，水平磁系高梯度磁选机获得的精矿TiO2品位更高。背景磁场强度为430 mT时，对选铁尾矿粗粒级物料经一次粗选，可获得含TiO2 16.21%、TiO2回收率90.49%的钛精矿。Abstract: High gradient magnetic separation-high gradient magnetic separation-flotation process is adopted for ilmenite beneficiation in a plant in Panzhihua-Xichang area, and the high gradient magnetic separation stage is the key factor influencing the total recovery rate of ilmenite.Using the coarse material of iron tailings after concentrating and grading as raw materials, ilmenite was recovered by high gradient magnetic separator with a horizontal magnetic system and vertical magnetic system, respectively.The results show that under the optimal conditions, the high gradient magnetic separator with a horizontal magnetic system achieves the same recovery rate of titanium concentrate as the high gradient magnetic separator with a vertical magnetic system, but titanium concentrate with a higher TiO2 grade can be obtained by the high gradient magnetic separator with a horizontal magnetic system.At the background magnetic field intensity of 430 mT, the titanium concentrate containing 16.21% of TiO2 and 90.49% of titanium recovery can be obtained by one time of rough beneficiation of iron tailings.
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