Effect of Circulating Load and Test Sieve Size on Bond Work Index for Natural Sand, Limestone and Bituminous Coal in a Laboratory Ball Mill

摘要

The Bond Work Index can be used not only for determining the grinding power but also to estimate the difference in power consumption while handling material of different hardness. Every material has a characteristic bonding strength at molecular and grain level. The power required to break the bonds is higher for harder material. This study has been carried out with an aim of comparing power consumption for three materials having different hardness. The effect of circulating load (CL) and test sieve size (P_i) on the bond grindablity (Gbg) and Bond Work Index (W_i) based on samples of limestone, natural sand and coal has been investigated. In the experimental studies, the relationships between the Bond Work Index with the circulating load and test sieve size are also examined.