超细粉碎技术,如搅拌磨,在结晶较细的矿物的磨矿过程中正日益受到重视。在以下三个方面对3种不同的搅拌磨进行了比较:能耗、产品粒度分布和不同磨矿细度下的矿物的解离度。采用两种高速搅拌磨机(Metso磨机和Netzsch Isa-Mill磨机)进行了实验室试验,用来对红狗矿山的锌粗精矿和中矿进行再磨。与当前生产中采用塔磨机进行再磨的结果进行了比较。与塔磨机相比,高速搅拌磨的能耗较低。与其它磨机相比,在给定的P80下,间歇式的搅拌磨能够获得更高含量的细颗粒。通过细磨,硫化矿物和石英的解离度得到了进一步提高。然而,对不同的矿物和不同的类型磨机,这种提高并不完全一致。采用高速搅拌磨降低磨矿细度获得的最大的好处是显著提高了石英的解离度。这很可能是由于与硫化矿物的磨矿相比,石英的磨碎需要更大的应力强度。当硫化矿物在前面的磨矿中获得了有效的解离,高速搅拌磨带来的更大的应力强度对石英的解离是十分必要的。 Ultra-fine grinding technology, such as stirring mill, is increasingly valued in the grinding of finer crystalline minerals. Three different milling mills were compared in the following three areas: energy consumption, product particle size distribution and mineral dissimilarity at different grinding fines. Laboratory tests were conducted on two high speed agitators (Metso and Netzsch Isa-Mill) to regrind the zinc concentrate and the medium ore from the Red Dog mine. Compared with the results of regrinding with a tower mill in the current production. Compared with the tower mill, high-speed stirring mill lower energy consumption. Compared to other mills, the batch agitator mill achieves a higher content of fine particles at a given P80. By fine grinding, the dissociation of sulfide minerals and quartz has been further improved. However, this improvement is not exactly the same for different minerals and different types of mills. The biggest benefit of using a high speed agitator mill to reduce the fineness of the mill is a significant increase in the quartz dissociation. This is probably due to the fact that the grinding of quartz requires more stress strength than the grinding of sulphide minerals. When sulphide minerals are effectively dissociated in previous grinding, the greater stress intensity of the high speed agitating mill is necessary for the dissociation of quartz.