Breakage parameters of some materials in smooth roll crushers

Abstract A model has been developed to describe the size distributions produced by fracture of material in a smooth roll crusher. The model assumes that each size breaks independently of other sizes, that the breakage pattern depends on the relative size of particle to gap, and that the overall breakage pattern can be deduced from repeated fructure with a normalized primary breakage distribution and bypass of sizes through the gap without breakage. The descriptive parameters of primary breakage distribution and bypass are given for two rocks and eight coals.