高频振动细筛在密地选矿厂的工业试验

攀钢矿业公司密地选矿厂为提高铁精矿品位，经过方案比较，选用GPS高频振动细筛进行了工业试验。试验利用高频细筛对弱磁粗选精矿进行筛分，筛上返回球磨机再磨，筛下进入弱磁精选。结果表明，可使铁精矿品位由52．73％提高到53．42％，球磨机处理量由71．39t／h提高到73．05t／h，而且GPS高频振动细筛运行稳定，筛分效率达79．55％，细筛相对于球磨机的作业率达99．33％，筛板使用寿命达85d。密地选矿厂根据试验结果，准备将GPS高频振动细筛在现场推广应用。

Industrial Test of High Frequency Vibrating Fine Screen in Midi Concentrator

To improve iron concentrate grade, Mide concentrator of Pan Steel's Mining Co. carried out an industrial test on GPS high frequency vibrating fine screen, based on the scheme comparison. In the test, the high frequency fine screen was used for the rougher concentrate of low intensity magnetic separation, the oversize fraction returning to the ball mill for regrinding and the undersize fraction flowing to the cleaning operation of low intensity magnetic separation. The results showed that the iron concentrate grade was raised from 52.73% to 53.42% and the ball mill throughput increased from 71.39% t/h to 73.05 t/h. In addition, GPS high frequency vibrating fine screen ran smoothly and had a screening efficiency up to 79.55%, an availability of 99.33% relative to the ball mill and a screen deck life of 85 days. According to the test results, Mide concentrator is going to extend the screen's on-site application.