河北某煤矿Bond功指数测定研究

Experimental Study on Bond Work Index of a Coal Mine in Hebei Province

本文基于Bond粉碎第三理论对煤矿矿样进行功指数的测定,取得了较好的试验结果。Bond功指数测定表明,在筛孔尺寸为270μm,给矿中80%物料能通过的粒度大小为785μm,磨矿平衡时筛下产品中80%物料能通过的粒度大小为245μm,每一转所生成Gbp为4.54 g/r,通过计算得出Bond球磨功指数为13.98 kW·h/t,为煤矿磨矿时磨机的选取提供很好的指导意义。

In this paper, based on Bond smash the third theory of coal, for the work index and the degree of grinding can be measured, we have achieved good test results. The Bond work index showed that when the size of sieve was 270 μm, the 80% of the material in the ore can pass through the sieve size of 785 μm. At the same time, the 80% of the material in the sieved product is subjected to a grain size of 245 μm and the Gbp reached 4.54 g/r when grinding is balanced. It is concluded that the Bond grinding index is 13.98 kW·h/t,which provides a good reference for the selection of mill in coal minegrinding.