我矿选矿车间破碎系统,使用PYB——900型圆锥破碎机。更换固定和活动伞板时,一直采用锌合金浇铸,以保证伞板与调整环及锥体间的紧密结合。用这种方法存在成本高、需要大量锌合金材料、更换时劳动强度大等缺点。在深入开展增产节约运动中,机修车间工人学习外地矿山经验,提出用水泥代替锌合金浇铸的建议。于1979年5月初,试验用 I mine dressing workshop broken system, the use of PYB - 900 cone crusher. Change fixed and movable umbrella, zinc alloy casting has been used to ensure that the umbrella plate and the adjustment ring and cone close together. In this method, there are disadvantages such as high cost, large amount of zinc alloy material and labor intensity during replacement. In furthering the campaign to increase production and save energy, mechanic workshop workers learned the experience of foreign mines and proposed the use of cement instead of zinc alloy casting. In early May 1979, the test