国内选厂在分级技术方面,总的来说,存在两个问题:一是分级设备品种太少,性能低劣;二是分级流程过于简单,效率不高。在现有选矿厂中,除个别采用磨矿机—筛子回路外,多数采用磨矿机—螺旋分级机或磨矿机—水力旋流器回路,往往是不论什么矿种均采用相同设备、流程,结果是分级效率有的还可以,有的就很低。据调查,螺旋分级机和水力旋流器的分级效率(文内除 In the selection of domestic technology in the classification, in general, there are two problems: First, too few varieties of grading equipment, poor performance; Second, the classification process is too simple, inefficient. In the existing concentrator, except for the individual use of grinding machine - sieve loop, most of the use of grinding machine - screw classifier or mill - hydrocyclone circuit, often regardless of what kind of minerals are used in the same equipment, processes The result is that some of the grading efficiency can be, and some are very low. According to the investigation, the grading efficiency of spiral classifier and hydrocyclone (in addition to text