我矿颚式破碎机排矿口处用弧形筛，原设计是网状的筛板结构，常因堵矿而停机、停产，最频繁的每半小时左右就得停机掏矿，严重影响生产。原弧形筛是网状的铸板结构，当破碎机内有片石或尖状矿石通过时就会卡在筛网处形成堆积而堵矿。1988年5月我矿宽1．2m，长2900m的钢芯皮带就 Mine mine jaw crusher row mouth with curved sieve, the original design is a mesh sieve structure, often because of blocking and shutdown, stop production, the most frequent every half an hour or so have to shut down mining, seriously affecting the production . The original arc sieve is a mesh plate structure, when the crusher stone or pointed ore passage will be stuck at the screen at the formation of accumulation and plugging. May 1988 I mine width 1.2m, 2900m long steel core belt on