Starkey amp; Associates Inc. Leaders in Comminution Design
= SAG mill feed sample mass, grams The ball mill pinion energy is determined from the Bond the Third Theory of Comminution : S dBWI = * / (P cs G pb ) / (10 / P 80 1/2 10 / F 80 1/2) where : S dBWI = Bond ball mill work index on SAG ground ore, kWh/ton ground F 80 = 80% passing of SAG ground of the test feed size, microns P 80 =