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.