Working Principle of a Laboratory Air Classifier:

A laboratory air classifier, together with a feeder, cyclone separator, dust collector, and induced draft fan control system, forms a classification system. Material, under negative pressure, is quantitatively fed directly into the classification zone from above by the feeder. The strong centrifugal force generated by the high-speed rotating classifying turbine separates coarse and fine materials. Fine particles meeting the particle size requirements pass through the gaps between the classifying wheel blades and are collected in the cyclone separator or dust collector. Coarse particles, carrying some fine particles, are further classified by the impact fan under the action of secondary air. The coarse particles, passing through the fan, enter the secondary classification zone for a third classification under the action of secondary air. Material meeting the particle size requirements then passes through the classifying wheel blades and enters the cyclone collector or dust collector. The separated coarse particles are discharged through the discharge device.

Performance Characteristics of Laboratory Air Classifier:

• Suitable for fine classification of powders, with particle sizes ranging from D97: 5 to 150 micrometers. Particle size is infinitely adjustable, and product changes are extremely convenient.
• High classification efficiency (extraction rate): 70%~90%.
• High classification accuracy, narrow particle size distribution, completely eliminating excessively large particles and residues in the product.
• Low rotational speed and long service life. For the same particle size, the classifying wheel speed is 50% lower than other horizontal and vertical classifiers. When producing powders with a Mohs hardness <5, the classifying wheel experiences no wear; when producing powders with a Mohs hardness ≥7, the service life of the classifying wheel is 5-8 times longer than other horizontal and vertical models.
• Utilizes a vertical classifying turbine device, resulting in low rotational speed, wear resistance, and low system power consumption.
• Can be used in series with multi-stage classifiers to simultaneously produce products across multiple particle size ranges.
• Can be used in series with ball mills, vibratory mills, Raymond mills, and other grinding equipment to form a closed-loop system.
• The system operates under negative pressure, eliminating dust pollution, ensuring a superior environment, high degree of automation, strong stability, and easy operation.