Features Of Quartz Sand Air Classifiers – Chanderpur Group

Air classifiers use airflow and the physical principles of inertia forces, drag forces, collisions, and gravity to disaggregate particles using a high precision process for classifying. Air classifiers are used for separating materials (fine dry powders) by combining the particle sizes, particle shapes, and densities. Air classifiers are typically used when the particle sizes of the dried materials being separated are too small to allow them to pass through the screens.

Types of Air Classifiers

There are many different quartz sand air classifier manufacturers which manufacture and supply mainly 4 types of air classifiers. 

• Gravitational Air Classifier

The working principle of gravitational air classifier is as follows:

• A current of air is passed through the sheet of falling material.
• Coarse material falls out the bottom of the classifier whereas the fine particulates are swept in the current of air.
• Used to separate 150 mesh to 150 microns fines from more coarse material.

• Gravitational - Inertial Air Classifier

The working principle of gravitational - internal air classifier is as follows:

• A current of air is passed through the sheet of falling material and then the entrained fines are recirculated back through the curtain of material.
• Can separate fines between 300 and 36 microns from more coarse material.
•  Centrifugal Air Classifier
• The working principle of centrifugal air classifier is as follows:
• Uses centrifugal force on the large particles to make them flow along with the baffles in the air classifier. It also uses the current of air that is passed through a curtain of circulating particles as they sweep off the edge of the baffle.
• Another air stream is introduced lower in the classifier to sweep any uncollected fines out of the material.
• Can be used to separate material from 100 microns to 15 microns from more coarse material.
•  Mobile Air Classifier

This classifier was developed by Van Torgersen which is employed on manufactured sand projects where multiple sites may be involved. The whole plant can be fitted into a standard truck base and utilizes a set of Van Torgersen high-efficiency multicell cyclones for exhaust gas clean-up.

Focusing on the influence of variation in the velocity of the airflow from the equipment of multiple air inlets on sand grading rates, the Barracuda VR (Virtual Reactor) air classification processes to produce sand were simulated. H. A. Petit used a CFD-DEM to model the sand classification process in the crossflow air classifier and evaluated the feasibility of the dust isolation. The current work is directed toward developing an integrated AI knowledge-driven system for process modeling.