This manuscript presents an experimental evaluation of the grinding of biomass pellet samples using ball mills. These samples are the torrefied and white wood pellets. Both samples were de-agglomerated with water to determine their original particle size before the pelleting process using RRSB model. Different design and operating parameters, including; ball charge fraction, classifier speed, fuel flow rates, and orifice size, are investigated. It was found that the particle size of torrefied pellets was finer than that of the white pellets. The results showed that grinding time had a significant inversed influence with the product fineness for both pellets at the laboratory scale. For the industrial scale, the aspired fineness of ≤ 30 % residue at a mesh size of 1.0 mm was obtained with a classifier. Moreover, power consumption decreased when increasing the discharge orifice width. The lowest specific power consumption was obtained at a classifier speed of 175 rpm.

这份手稿提出了使用球磨机研磨生物质颗粒样品的实验评估。这些样品是烘焙过的白色木屑颗粒。在造粒过程之前，使用 RRSB 模型将两个样品都用水解聚，以确定它们的原始粒度。不同的设计和运行参数，包括；研究了球装料分数、分级器速度、燃料流速和孔口尺寸。发现烘焙颗粒的粒度比白色颗粒的粒度更细。结果表明，研磨时间对实验室规模的两种颗粒的产品细度有显着的反向影响。对于工业规模，使用分级机获得 1.0 毫米筛目尺寸下 ≤ 30% 残留物的理想细度。而且，增加排放孔口宽度时，功耗降低。在 175 rpm 的分级速度下获得最低的比功率消耗。