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依据粒度组成建立了三种类型破碎磨矿流程粒度特性方程,经比较,认为矿石的可碎性差异不大,产物的粒度特性主要取决于破碎方式。梯形跳汰机不能有效地回收细粒级,因而碎矿工艺是影响收率的重要因素;反击式破碎机闭路破碎矿石过粉碎不严重,因而分选效果好;反击式破碎闭路流程投资最省,生产费用最低,新建选厂宜采用该流程。对已建棒磨机选矿厂,建议改闭路棒磨为开路棒磨,避免矿石过粉碎,以利于提高回收率。
According to the particle size composition, the three types of particle size characteristic equations of crushing and grinding process are established. The comparison shows that the fines of the ore are not different, and the particle size of the product depends on the crushing mode. Trapezoidal jig can not effectively recover fine-grained, so the crushing process is an important factor affecting the yield; Impact Crusher closed-circuit crushing ore crushing is not serious, so the sorting effect is good; Impact crusher closed-circuit investment is the most provincial , The lowest production costs, the new plant should adopt the process. The rod mill has been built beneficiation plant, it is proposed to change closed rod mill for the open rod mill, to avoid over crushing ore, in order to help improve the recovery rate.