How to measure the particle size distribution of coal?

Pass it through sieves with different sieve pore sizes, then create a histogram based on the particle size ranges, and regress the particle size distribution density function. That should be fine generally.

What is coal powder used for? Those who make water-coal slurry? That thin part is a bit troublesome. You can first sieve the components into coarse and fine parts. Note down their respective total weights. The coarse particles can be sieved, while the fine particles can be diluted and mixed with a dispersant for low-magnification microscopic counting (it’s also possible to use a high-magnification camera to take images and count particles of different sizes); it’s best to use samples that are relatively large. It's fine to have a size reference when taking photos. First, obtain the particle size distributions for the coarse and fine portions separately, and then combine them. If used frequently, it is possible to find someone familiar with computer graphics to use image analysis software to automatically process and analyze the particle diameter distribution. This technology should already be mature, but if I were to use it, I would still need to read some materials first. There are ready-made laser analysis instruments available for purchase, but they are expensive. This post was last edited by RainWolf on 2009-2-21 19:58]

Use Popper analysis; it should be possible to measure it~~~

Generally, the screening method is used, with the calculation based on the weight that passes through sieves of different mesh sizes. It is recommended to consult the analysis staff at your company, as they have standards.

Wet screening can be used, as well as a laser particle size analyzer.

Laser particle size analyzers are more convenient to use; screening is too troublesome

Use a laser particle size analyzer; it’s more standard. Screening methods are not standard and are also troublesome

GB/T 18856.3-2008 Water-coal slurry – Screening test 1 10 China Standard Press

The coarser particle size distribution of coal powder can be determined through screening, while a laser particle size analyzer can be used for water-coal slurry

If a laser particle size analyzer is used, it is best to compare it regularly with the sieving method. Personally, I feel that there is still a difference in the results obtained by the two methods.