近几年来,国外在碎磨流程方面,有采用大直径球磨机和半自磨的两种倾向,有色矿山新建的选矿厂采用半自磨机(即自磨机加6～8％钢球)加第二段球磨也越来越多;而砾磨机作为二次磨矿要比一次磨矿使用广泛。其分级设备大都采用水力旋流器。如美国的双峰选矿厂,加拿大的直布罗陀选厂和布伦达选厂,马来西亚 In recent years, foreign countries in the grinding process, there are two kinds of large-diameter ball mill and semi-self-wear tendencies, non-ferrous mining new concentrator using semi-self mill (ie from the mill plus 6 to 8% ball) plus The ball mill is also more and more the second paragraph; and pebble grinding machine as a secondary grinding more widely used once grinding. Most of its grading equipment hydrocyclones. Such as the United States Shuangfeng concentrator, Canada's Gibraltar plant and Brenda processing plant, Malaysia