目前国内外选矿厂多数采用磨矿机-螺旋分级机或磨矿机-水力旋流器的磨矿回路,少数选矿厂采用磨矿机-水力旋流器-细筛回路。水力旋流器已成为重要的分级设备。然而,当前所用的分级设备,均存在分级效率低的问题。水力旋流器常有溢流跑粗、底流夹细,分级效率在27～60%左右,即约有40～60%合格的矿粒返回磨机,螺旋分级也约有60%的合格矿粒被返回磨机。如克里沃洛采选公司第三段磨矿回路,水力旋流器沉砂中含72～80%合格的粒级产品,分 At present, most ore dressing plants at home and abroad use grinding machine - spiral classifier or grinding machine - hydrocyclone grinding circuit, a small number of concentrator mill - hydrocyclone - fine sieve circuit. Hydrocyclones have become an important grading equipment. However, the current classification devices have the problem of low classification efficiency. Hydrocyclones often run thick overflow, underflow folder fine grading efficiency of about 27 ~ 60%, that is, about 40 ~ 60% qualified ore return mill, spiral grading is also about 60% of the qualified mineral particles Was returned to the mill. Such as Kerry Woluo Mining Company third paragraph of the grinding circuit, hydrocyclone grit containing 72 to 80% of qualified particle size products, points