Air Classifier

The air classifier serves as a key equipment to address issues such as high energy consumption, low efficiency, and uneven particle size distribution in traditional ball mills. By integrating with the ball mill to form a closed-circuit circulation system (ball mill classification production line), it achieves precise separation of coarse and fine powders. This effectively eliminates over-grinding, significantly improving grinding energy efficiency.

Features and Advantages of Air Classifier

Precise Classification: By accurately controlling the centrifugal force field and airflow field, it effectively separates particles near the critical size. This results in a concentrated particle size distribution, reduces the content of both oversized and ultrafine particles, and thereby improves powder quality.

Wide Application Range: The process can be customized based on equipment type. Air classifiers can handle materials ranging from tens of mesh (hundreds of microns) down to several microns or even sub-micron levels. They are typically integrated with ball mills to form ball mill classification production lines, offering a very broad range of applications.

Simple and Efficient: Air classifiers feature a simple structure and small footprint. Particle size can be flexibly adjusted by regulating the rotor speed, improving classification efficiency and thus enhancing system energy efficiency.

Wear-Resistant and Contamination-Free: Key components (e.g., rotor, liners) are typically made of wear-resistant materials such as ceramics or special alloys, effectively preventing contamination by impurities like iron rust. This is particularly suitable for processing materials requiring high purity (e.g., kaolin, calcium carbonate).

Working Principle of Air Classifier

Centrifugal Force Field: A high-speed classification rotor generates an adjustable centrifugal force field, which interacts with the stable upward airflow (classification airflow) provided by the system fan to form a pair of opposing separation forces (centrifugal force vs. air drag).

Air Classification: In the rotor region, particles are separated based on the dynamic balance between the centrifugal force and air drag they experience. Larger particles are thrown outward by centrifugal force to become coarse powder, while finer particles pass through the rotor with the airflow to become fine powder.