Research on Calculation Models of Coal Comminution Energy Consumption

Based on the present studies on energy consumption of comminution,three famous hypotheses about prediction theories of comminution energy consumption including Kick’s hypothesis,Rittinger’s hypothesis and Bond’s hypothesis,and their modification were introduced and compared for the single-size particles.And the general correlations and the new mechanisms proposed in recent years including primary crack hypothesis,catastrophe theory and fractal theory were described.With these achievements,the material comminution energy consumption with complex size distribution of G-S distribution,R-R distribution and fractal distribution respectively were predicted theoretically through introducing the feed and product size distribution as parameters to energy consumption calculation.In addition,some of the commonly used empirical correlations were listed and compared.It is believed to be feasible to predict the energy consumption of coal comminution by Walker method combining with fractal particle-size distribution or R-R distribution and Morrell correlation.