Product Bulletin
Efficient Sorting of Industrial Sand and Aggregates

• Benefits of Air Washing
• Reduce loading or eliminate setting ponds
• Lower maintenance and operation costs (pumps, dredging, belt presses, flocculants)
• Environmentally friendly
• Reduce moisture and minimize asphalt costs
• Develop additional market opportunities for minus 200 mesh material
• Complement wash plants with upstream removal of fines to reduce water use and washed products (where required).
• No water necessary except for dust suppression.
• No moving parts within material flow stream.
• Internal lining - AR plate or ceramic

Free replacement parts - first three years!

Durable, Dependable, High-Quality Equipment - NO moving parts in the material flow stream

The design of the gravitational inertial classifier uses air flow, gravity and directional changes to achieve material cut points from 50 to 200 mesh.

Gravitational Inertial Classifier

The Buell Aggregate Classifiers combine gravitational, inertial, centrifugal and aerodynamic forces to efficiently classify materials at cut points ranging from 50 to 200 mesh (300 to 75 microns). The feed material and primary air enter the top of the unit and travel downward. The air makes a 120 degree change in direction. It then exits through the vanes, carrying fine particles with it.

The coarse particles that are too heavy to make the turn fall to the bottom where they pass through the secondary air before they are discharged through a valve.

Secondary air, injected below the vanes, passes through the curtain of falling particles. Those particles that are near cut point in size are diverted by the secondary air stream into an eddy current within the heart-shaped chamber. Some fines are captured as they enter the unit while others are drawn from the eddy. These are carried by the exiting air to a fabric filter for final recovery.

Mobile Classifiers

Bronze Winner 1996 - National Stone Association -
Capstone Award

• Dry classifying for Superpave specifications
• No water needed - no settling ponds
• Low maintenance for substantial savings
• Transportable to job sites
• 75 tph, 100 tph, 150 tph models
• Classify feed material at cutpoints from 50 to 200 mesh