Different industries have different requirements for powder fineness. At present, the fields of food, pharmaceuticals, feed, fertilizers and fine chemicals have relatively high requirements for the fineness of grinding powder.

The following factors have an impact on the fineness of crushing.

1. Material Characteristics:

Hardness: The harder the material, the more challenging it is to achieve a fine particle size.

Moisture Content: High moisture content can cause clumping, affecting the pulverization effectiveness and fineness.

Brittleness: More brittle materials are generally easier to pulverize into finer particles.

2. Equipment Speed:

Rotor Speed: Higher rotor speeds result in greater shear and impact forces on the material, enabling finer pulverization.

3. Pulverization Medium:

Size of Grinding Media: The size and material of the grinding media directly impact the pulverization results. Smaller grinding media usually achieve finer particle sizes.

4. Pulverization Method:

Dry vs. Wet Grinding: Wet grinding typically achieves finer particle sizes because the liquid reduces friction and adhesion, enhancing pulverization efficiency.

5. Screen or Classification Equipment:

Screen Mesh Size: The size of the screen mesh determines the final particle size of the powder. Smaller mesh sizes yield finer powders.

Classifiers: Effective classifiers can separate powders of different sizes, ensuring consistency in product fineness.

6. Feed Rate and Amount:

Feed Rate: A feed rate that is too high may lead to insufficient pulverization and suboptimal particle size; too slow a feed rate may affect production efficiency.

Feed Amount: Excessive feed can lead to uneven pulverization, affecting fineness.

7. Pulverization Time:

Extended Pulverization Time: Increasing the pulverization time can improve particle size fineness, but care must be taken to avoid over-grinding.

8. Operating Conditions:

Temperature: Changes in temperature can affect the material's properties, impacting pulverization results. For example, high temperatures may soften some materials, affecting fineness.

Airflow Speed: In air stream pulverization, faster airflow speeds enhance the acceleration and collision of materials, leading to finer particle sizes.

Considering these factors collectively can optimize the pulverization process of an ultra-fine pulverizer to achieve the desired particle size.