In this work, the screening process of an industrial-scale roller screen was simulated based on the validated discrete element method (DEM). The effects of the feed rate, rotational speed of rollers, inclination angle of screen deck and the cohesion force between wet particles on the screening process were investigated. The results show that screening efficiency decreases with the increase of feed rate, which remains above 0.80 when the feed rate is less than 700 kg/s. The optimal values of rotational speed and inclination for high efficiency are 100 r/min and 6°, respectively. Working parameters have a significant effect on both the passing percentage and the average velocity of different size fractions. Hence, reasonable working parameters should be adopted to avoid the accumulation of particles on the deck. Moreover, both particle shape and cohesion force have little effect on the screening processes of the roller screen.

在这项工作中，基于验证的离散元方法（DEM）模拟了工业规模的辊式筛网的筛选过程。研究了进料速度，辊子转速，筛板倾角和湿颗粒之间的内聚力对筛选过程的影响。结果表明，筛分效率随进料速度的增加而降低，当进料速度小于700 kg / s时，筛分效率保持在0.80以上。为了实现高效率，转速和倾斜度的最佳值分别为100 r / min和6°。工作参数对不同尺寸级分的通过率和平均速度都有重大影响。因此，应采用合理的工作参数以避免颗粒堆积在甲板上。此外，