前言细筛在黑色金属选矿厂,较为普遍地被用来作为粗粒分级设备,最近有用细筛取代螺旋分级机的发展趋向。细筛的另一作用,即控制浮选的最佳粒级却常常被忽略,特别在有色金属和非金属矿山,细筛至今还很少被采用。本文就浙江东风萤石矿选厂第三系列在工 Preface Fine screening in the ferrous metal concentrator, more commonly used as a coarse grading equipment, has recently been used as a fine sieve to replace the spiral grading machine. Another function of fine screens, the optimal particle size for flotation control, is often overlooked, especially in non-ferrous and non-metal mines, where fine sieves are seldom used. In this paper, Zhejiang Dongfeng fluorite ore processing plant in the third series of workers