Performance characteristics of air classifier

Air classifiers are often used in series with grinding equipment because it can precisely control the particle size of the finished product. For example, the airflow grinding equipment with a classification system is screened by the classification system after grinding, and the particles of qualified particle size are passed through the classification wheel with the airflow to the next process, and the coarse particles that do not meet the particle size are returned to the grinding chamber to continue grinding. Because of the precise screening function of the air classifier, it can be used not only alone, but also in series with most grinding equipment.

The principle of the air current classifier is that the material is quantitatively raised to the classification area through the feeder under the action of negative pressure air, and under the action of the strong centrifugal force generated by the high-speed rotating classification turbine, the coarse and fine materials are separated, and the fine particles meeting the particle size requirements pass through The gap between the grading wheel blades enters the cyclone separator or the dust collector to collect, the coarse particles entrained by the part of the fine particles hit the wall and the speed disappears, and descends along the cylinder wall to the secondary air outlet. After the strong elutriation of the secondary air, the coarse and fine particles are separated. The fine particles rise to the classification zone for secondary classification, and the separated coarse particles are discharged through the unloader.

Performance characteristics of air classifier

• It is suitable for fine grading of powder, the particle size of the grading product can reach D50:1~45μm, the product size can be adjusted, and the variety change is extremely convenient.
• High classification efficiency (extraction rate) 60% to 90%.
• The classification accuracy is high, the particle size distribution is narrow, and oversized particles and sieve residues in the product are completely eliminated.
• Low rotation speed and long service life: The rotation speed of the classification wheel is 50% lower than other horizontal and vertical classifiers for the same classification particle size. When producing powder with Mohs hardness <5, the grading wheel has no abrasion; when producing powder with Mohs hardness ≥ 7, the service life of the grading wheel is 5-8 times longer than that of other horizontal and vertical types.
• The vertical grading turbine device is adopted, which has low speed, wear resistance and low system power configuration.
• Multi-stage classifiers can be used in series to produce products with multiple particle sizes at the same time.
• It can be used in series with jet mill, impact mill, ball mill, vibration mill, Raymond mill and other grinding equipment to form a closed loop.
• The system is produced under negative pressure, no dust pollution, excellent environment, high degree of automation, strong stability, and easy operation.