Dry separation or recovery of ultrafine materials


  • Provides maximum separation of particles between the range of 5-10 microns
  • High efficiency (98%+) collection of a variety of materials
  • Uniquely designed inlet scroll eliminates currents perpendicular to main direction of gas flow, unlike conventional rectangular entrance cyclones


  • Ability to create particle size separation using bleed air control
  • Reduces loading to or eliminates fabric filter
  • Capable of withstanding high temperature process applications using low alloy steel, where required
  • Fabrication offered in mild carbon steel, stainless steel, and aluminum
  • Abrasion resistant plate, ceramic lining, or refractory lining  also available for various degrees of abrasive applications

Process overview

Collection or recovery of dust/particulate matter in the widest variety of construction, industrial, and mining applications.

Cyclonic classifier - How it works

The feed material to be classified is conveyed pneumatically into the cyclone through the inlet scroll where it is transferred into a fluidizing air stream.  The ascending vortex carries the fine material out of the top of the classifier through the gas outlet tube.  The coarse material is disengaged from the airstream in the disengaging hopper where it discharged out the bottom of the cyclone through an airlock or into a sealed container.

The degree of classification is determined by the amount of reverse flow, inlet air volume, collector type/size, and the specific characteristics of the materials to be classified.


Technical information
Cyclonic Classifier (#72CG75 Shown) :

Overall Dimensions

6’ Dia. x 35’-6” Tall x 7’ Wide (1.8m x 10.8m x 2.1m)

Cyclonic size ranges available :

Single unit cyclones ranging from

0.5 m3/s – 10 m3/s (1000 cfm – 20,000 cfm)

Multiple unit cyclones

up to 50 m3/s (100,000 cfm)


Brochure - Air Classifiers - English Download
Technical specifications Cyclonic Ultrafine Classifier - English Download
Technical datasheet Air Classification - English Download
Technical datasheet Air Classification Options - Portuguese Download
Technical datasheet Air classification laboratory services - English Download

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