Air Classifier Mill (ACM) is an integrated grinding‑classifying powder processing system, widely used to produce powder with average particle sizes ranging from 10 micron to 100 micron. It hits this targeted micron window by combining screen‑free impact grinding architecture, real‑time adjustable air classification, frequency‑driven particle size tuning, and optimized fluid flow design.
1. Screenless impact grinding for primary particle reduction
Unlike traditional hammer mills relying on mesh screens to limit particle size, JACAN ACM adopts a screenless high‑efficiency fluid architecture. Raw materials enter the grinding chamber and receive high‑speed impact, collision and shear force from grinding rotors. This mechanism breaks bulk feedstock into broad‑range fine particles without screen clogging. The screen‑free design removes aperture limitations of mesh screens, allowing continuous generation of particles spanning tens of microns, and avoids output drop caused by screen blockage.
Coarse particles stay inside the grinding zone for repeated impact comminution, until they are small enough to be carried by internal air flow toward the classification section. This primary grinding step generates the raw particle population that will later be trimmed to the 10‑100 μm target band.
2. Real‑time adjustable air classification controls top‑cut and PSD
The core to lock 10‑100 μm average particle size lies in its built‑in dynamic air classifier with integrated frequency drives, enabling real‑time precision size control. Operators modify classifier rotor speed on‑the‑fly without production shutdown.
- Higher classifier rotational speed increases centrifugal force, rejecting more over‑size coarse particles back to grinding chamber, shifting finished powder toward finer end near 10 μm.
- Lower classifier speed weakens centrifugal separation, permitting larger particles to pass through to finished product, pushing average particle size toward 100 μm.
By tuning frequency drives, users adjust top‑cut value and particle size distribution (PSD) dynamically. This guarantees consistent average particle size within 10‑100 μm range, and secures batch‑to‑batch repeatability without downtime for hardware change‑out. Oversized particles are recirculated back into grinding zone for re‑grinding, while qualified 10‑100 μm particles are transported by air flow to downstream pulse‑jet dust collection unit as final product.
3. Optimized internal fluid flow stabilizes particle classification
The fluid‑optimized chamber geometry minimizes internal air resistance, creating stable laminar air circulation inside the mill body. Balanced air velocity ensures that particles are separated strictly according to aerodynamic diameter. Particles within 10‑100 μm gain proper air‑borne transport force; ultra‑fine dust can be captured by dust collector, and over‑granular fractions return for re‑comminution. Well‑tuned air flow prevents fine particle agglomeration and short‑circuit of coarse material escaping to finished powder, stabilizing final average particle size.
4. Optional ceramic lining preserves particle integrity for high‑purity powder
For high‑end materials requiring zero iron contamination, optional modular ceramic linings are equipped inside grinding and classification chambers. Wear‑resistant ceramic protection avoids metal debris mixing into powder, which would create false coarse contaminants and distort particle‑size test results. This hardware option keeps measured average particle size truly representative of ground material, maintaining reliable 10‑100 μm output for premium‑grade powders.
5. Full‑system turn‑key configuration supports stable micron‑range output
The complete ACM system covers automated feeding, integrated grinding‑classification module, and pulse‑jet dust collection, built as quick‑access modular units. Steady feeding rate prevents material overload or under‑feed, both of which would drift particle size outside 10‑100 μm window. Quick‑clean structure reduces cross‑contamination risk between batches, securing consistent PSD performance across production runs.
ACM reaches the 10‑100 μm average particle size target through a closed‑loop workflow: screen‑free impact grinding produces base fine particles; variable‑frequency dynamic air classifier sets cut‑point to sift target‑size fractions; optimized internal air flow stabilizes particle separation; auxiliary hardware guarantees powder purity and batch consistency. Operators adjust classifier speed directly according to target particle size requirement, switching flexibly across the full 10‑100 micron working range without equipment modification.
