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对于颗粒状及粉体状固体物料,其粒度测量(或分检)方法一般有两种:筛分法与筛分以外的测量(或分检)法。筛分法,指用一个或多个试验筛,通过分离混合颗粒进行固体物料粒度分析的方法;而筛分以外的测量(或分检)法,则指用显微镜测定、沉积分析、光散射与衍射,以及图象分析法等,对颗粒粒度进行测量的方法。对化工产品,如肥料、化学矿、分子筛及催化剂等,其粒度测量方法多为筛分法。但近年来由于粉体工程技术所开发的超细粉状无机化工产品,就要用筛分以外的测量方
For granular and powdery solid materials, the particle size measurement (or sub-test) there are two general methods: screening and screening methods other than measurement (or sub-test). Sieve method refers to the method of particle size analysis of solid materials by separating mixed particles with one or more test sieves; and the method of measurement (or fractionation) other than sieving refers to a method of using microscopic determination, sedimentation analysis, light scattering and Diffraction, and image analysis, etc., to measure the particle size. For chemical products, such as fertilizers, chemical minerals, molecular sieves and catalysts, the size of the measurement method for the screening method. However, in recent years due to powder engineering technology developed by ultra-fine powder inorganic chemical products, it is necessary to use screening outside the measuring side