筛分法和显微镜法对矿化垃圾粒径分布的比较

Comparative between sieving method and microscope in particle size distribution of aged refuse

为寻求合理有效的矿化垃圾粒径分布分析方法,分别采用筛分法和显微镜法两种测量手段对其进行比较研究。结果发现,两种方法所得的粒径分布结果差异较大,筛分法可能由于颗粒间静电吸附、聚合成团等因素影响而对小粒径颗粒区分能力较差,主要适用于大粒径颗粒的粒径分布测量(dp>100μm);显微镜法能够直观地观察到颗粒的显微图像,但测量时只是随机选择区域进行局部颗粒的测量,不宜分析粒度范围宽的样品,更适用于测量粒径较小的颗粒(dp<20μm)。

In order to seek a rational and effective analysis method,sieving method and microscope were stuided comparatively in particle size distribution of aged refuse. As the results indicated,there was an obvious difference between the two measurements in particle size distribution. Sieving method was poor in distinguishing small particles,because of the impact of electrostatic adsorption or aggregation between particles. It is mainly suitable for measurement of larger particle of aged refuse( dp> 100 μm). Microscopy could visually observe the microscopic image of particles,but it only measured part of the sample by random selection. Microscopy is more appropriate for the measurement of small particles( dp< 20 μm).