Grinding equipment mesh refers to the fineness or particle size achieved by grinding machinery, often measured in mesh size (number of openings per linear inch in a sieve). Here’s a breakdown of key aspects:
1. Mesh Size Basics
– Definition: Mesh indicates how many openings exist per inch in a sieve (e.g., 100 mesh = 100 openings per inch).
– Finer Particles: Higher mesh numbers (e.g., 200–400 mesh) mean smaller particles.
– Coarse Grinding: Lower mesh numbers (e.g., 10–60 mesh) indicate larger particles.
2. Common Grinding Equipment & Their Mesh Range
– Ball Mills: Typically grind to 50–300 mesh (coarse to medium-fine).
– Raymond Mills: Achieve 80–325 mesh (fine powders).
– Ultrafine Mills (e.g., Jet Mills, HGM Mills): Can reach 400–2500+ mesh (nanoscale particles).
– Hammer Mills: Used for coarse grinding (10–100 mesh).
– Pin Mills: Produce medium-fine powders (50–200 mesh).
3. Applications by Mesh Size
– 20–100 Mesh: Construction materials, agricultural feed.
– 100–400 Mesh: Pharmaceuticals, cosmetics, food additives.
– 400+ Mesh:
vanced materials (e.g., ceramics, electronics).
4. Factors Affecting Mesh Output
– Screen/Sieve Selection: Determines maximum particle size.
– Grinding Time/Duration: Longer grinding = finer particles.
– Material Hardness: Harder materials may require specialized mills.
– Airflow/Classifiers: Separate fine particles efficiently (common in jet mills).
5. Conversion to Microns
| Mesh | Microns (µm) |
|———–|————-|
| 20 | ~850 |
| 100 | ~150 |
| 200 | ~74 |
| 325 | ~44 |
| 500 | ~25 |
Tips for Choosing Equipment:
– For coarse grinding: Use hammer or jaw crushers.
– For fine/ultrafine powders: Opt for jet mills or ball mills with classifiers.
– Check if your industry has specific standards (e
Leave a Reply