Abstract Jet milling is widely used in several industrial applications to produce fine particles with a narrow size distribution. We studied by means of experiments, the influence of grinding pressure, holdup and milling time on the performance of a spiral air jet-mill operating in a batch mode, with respect to the particles. The experimental results indicated that a uni-modal size distribution of feed particles yields trimodal particle size distributions. The data for variation of the mean particle size and specific surface area with energy supplied collapsed to a curve for all the cases studied, indicating that mean size is primarily dependent on the energy supplied. A population balance model for the dynamics of the batch milling process, based on empirical breakage functions is developed, which describes the experimental results quite well. The form of the breakage functions provides an insight into the mechanisms of breakage of particles.

中文翻译：

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螺旋气流磨粉磨分析[J]. 第 1 部分：批量研磨

摘要 气流粉碎广泛用于多种工业应用，以生产具有窄尺寸分布的细颗粒。我们通过实验研究了研磨压力、滞留时间和研磨时间对以间歇模式运行的螺旋气流磨机性能的影响，就颗粒而言。实验结果表明，进料颗粒的单峰粒度分布产生三峰粒度分布。对于所研究的所有情况，平均粒径和比表面积随所提供能量的变化数据折叠成一条曲线，表明平均尺寸主要取决于所提供的能量。开发了基于经验破碎函数的批量研磨过程动力学的总体平衡模型，该模型很好地描述了实验结果。