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细筛(原各切割筛)六十年代国外已经采用,我国是从七十年代开始研制的。近年在一些铁矿选厂及个别稀有金属矿山开始使用。我国用的细筛,由尼龙1010注塑成型的筛篦组成。筛篦长×宽×高=400×120×5.1毫米。筛条断面为一等腰梯形。此筛篦较不锈钢筛条具有造价低廉,耐磨损等优点。目前我国几个铁矿选矿厂采用的细筛,根据生产规模不同,每台细筛均由多联筛片组成。每联筛片由多块筛篦并成,一般长1200×1500毫米,细筛倾角50～60°,处理量5～8吨/联·小时。给矿浓度50%左右。筛孔(长孔)0.15～0.35毫米,击振装置的打击频率在6～21次/分。
Fine screen (the original cutting screen) has been used abroad in the 1960s, our country was developed from the seventies. In recent years, some iron ore processing plants and individual rare metal mines began to use. Fine mesh used in our country, made of nylon 1010 injection molded grate composition. Sieve grate length × width × height = 400 × 120 × 5.1 mm. Screen section of an isosceles trapezoid. This screen grate stainless steel screen with a lower cost, wear resistance and so on. At present, several fine iron concentrates used in our country, according to different production scale, each sieve consists of multi-screen sieve composition. Each piece of sieve is made up of multiple pieces of sieve grate, usually 1200 × 1500 mm in length. The fine sieve angle is 50-60 °, and the treatment capacity is 5-8 tons per united hour. To ore concentration of about 50%. Screen (long hole) 0.15 ~ 0.35 mm, the impact of the vibration device hit frequency of 6 to 21 beats / min.