SOME ENGINEERING FACTORS AFFECTING DATE PITS CRUSHING

The main objective of the present work was to study and evaluate some engineering factors affecting date pits crushing for small locally made crushing unit at moisture content of 7.75 % db. The performance of date pits crushing unit was evaluated at different cylinders speeds (150, 250, 350 and 450 rpm), clearances between cylinders (zero, 1 and 2 mm) and opening feed areas (30, 37.5 and 45 cm2). The results showed that the highest productivity was 822 kg/h obtained at 150 rpm cylinder speed, 2 mm clearance between cylinders and 45cm2 opening feed area. The best result for crushed date pits particle size was obtained at 350 rpm, 0 mm clearance between cylinders and 37.5 cm2 opening feed area. While the minimum specific energy 1.11kW.h/Mg was obtained at 150 rpm, 45 cm2 opening feed area and 2 mm clearance between cylinders.