秦皇岛某微细粒铁矿搅拌磨细磨——磁选工艺试验研究

采用立式搅拌磨机作为微细粒级矿物的再磨设备，以秦皇岛地区微细粒级铁矿为试验样品，进行了磨矿及磁选条件试验研究，结果表明，磨矿产品粒度达到-0.038mm占95.43%，经一次粗选和两次精选可以获得产率66.12%、磁性铁品位为64.06%、回收率为97.16%，全铁品位为65.94%的优质铁精粉。磨机磨矿电耗测试表明，当磨矿产品粒度达-0.038mm约占95.00%时，磨矿电耗为15.20kW·h/t。该试验表明，秦皇岛地区的铁矿可以通过细磨解离获得好的选矿指标，立式搅拌磨机是一种高效的细磨设备。 

Research on Technology Optimization of Fine Grinding and Magnetic Separation for a Fine-grained Iron Ore in Qinhuangdao

A vertical stirring mill is used as the regrinding equipment for fine-grained minerals.The fine-grained iron ore in the Qinhuangdao area is used as the test sample to conduct a test study on grinding and magnetic separation conditions.The results show that the particle size of the ground product reaches -0.038 mm It accounts for 95.43%.Highquality iron powder with a yield of 66.12%, a magnetic iron grade of 64.06%, a recovery rate of 97.16%, and a total iron grade of 65.94% can be obtained after one rough selection and two selections.The grinding power consumption test of the mill shows that when the particle size of the grinding product reaches -0.038 mm, which accounts for about 95.00%, the grinding power consumption is 15.20 kW·h/t.The test shows that the iron ore in the Qinhuangdao area can obtain good beneficiation indexes through fine grinding and dissociation.The vertical mixing mill is an efficient fine grinding equipment.