The explain to the pictures:
1:Classifying.
2:Milling.
3:Screening.
4:Sieves series from 40 to 100 meshes.
5:Weighing and batching according to a certain proportion.
6:Liquefying by ball-milling.
7:Screening ball-milled material and depositing.
8:Packaging and piling in moisture and shade.
9:Carrying.