采用旋转筛分选器进行了颗粒按形状的分选。旋转筛上有许多直径为300μm的筛眼,不断地把球形的玻璃颗粒从球形和非球形(不规则形状的)颗粒的混合物中分离出来。这些颗粒的直径大约为400μm。实验中发现,1:1的混合物(球形颗粒数:非球形颗粒数)的球形颗粒的回收率比1:2的混合物要高。也就是说,1:2的混合物,球形颗粒的百分数从29.4增加到44.5;而1:1的混合物,球形颗粒的百分数从59增加到76.1。因为比值(?)/(?)′=ψ代表一种形状指标,所以我们定义ψ为颗粒的球形度。ψ=1的颗粒是一个完全的球形,而随着ψ值的减小,颗粒的不规则性增加。式中,面是单个颗粒的平均质量,(?)′是当量球体的质量。 The rotary sieve separator was used to sort the particles by shape. The rotating screen is provided with a number of 300 μm diameter sieves, constantly separating the spherical glass particles from the mixture of spherical and non-spherical (irregularly shaped) particles. The diameter of these particles is about 400 μm. It was found experimentally that the recovery of spherical particles of 1: 1 mixture (number of spherical particles: number of non-spherical particles) is higher than that of 1: 2 mixture. That is, the 1: 2 mixture increases the percentage of spherical particles from 29.4 to 44.5, while the 1: 1 mixture increases the percentage of spherical particles from 59 to 76.1. Since the ratio (?) / (?) ’= Ψ represents a shape index, we define ψ as the sphericity of the particle. The particle with ψ = 1 is a complete sphere, while the particle irregularity increases as the ψ decreases. In the formula, the surface is the average mass of a single particle, (?) ’Is the mass of the equivalent sphere.