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在破碎筛分工艺中,对于破碎机前面的预先筛分,块度超过50～100毫米的矿石分级普遍采用固定格条筛。为了提高筛分质量,避免过粉碎,尤其是块矿必须严格分级时,改用机械筛分更为合理。山东省淄博市湖田石灰石矿已改用机械筛分,实践效果良好,适用于轻金属系统的矿山及工厂。湖田石灰石矿的产品分5～20、20～40、
In the crushing and screening process, for the pre-screening in front of the crusher, a block of sieve with a fixed grid is generally adopted for ore classification with a blockiness exceeding 50-100 mm. In order to improve screening quality, to avoid over crushing, especially lump ore must be strictly graded, switch to mechanical screening more reasonable. Shandong Zibo Hutian limestone mine has been switched to mechanical screening, the effect is good, suitable for light metal systems mines and factories. Hutian limestone mine product points 5 to 20, 20 to 40,