Equipment for separating materials less than 75 microns with cut sizes as fine as 1 microns for some materials.

air classification machine
Process

AVEKA CCE Technologies designs and manufactures High-Efficiency Centrifugal Air Classifiers to separate fine particles in the less than 75μm range utilizing the opposed forces of centrifugal and drag in close proximity to a high intensity dispersion mechanism. The classifier incorporates an optimized feed introduction which maximizes the effectiveness of the dispersion forces and minimizes distortion of the particle trajectories within the vortex field. This allows the classifier to achieve a precise, predictable and extremely sharp separation at a high solids loading. The Model 100 Classifier system is the ideal tool for the production of lab size samples, product development and/or small quantity production. Both the Model 250 and 500 offer the laboratory precision at production rates.

The flow patterns through the AVEKA CCE Classifier are described as follows: Feed enters the system through the central tube which is angled to the radial to minimize the distance of coarse particle injection into the vortex due to inertia. The space between the outer edge of the blades and the periphery of the rotor forms the classification zone. Coarse product, which is rejected outward by the centrifugal field, is conveyed out of the classifier through the coarse outlet using a jet pump mounted on a cyclone. The cyclone overflow is returned to the classifier through the recycle port. Fine product leaves the classifier through the central outlet with the primary air flow. The classifiers come complete with all the major components necessary for classification of dry powders in the less than 75 micron size range. A typical system includes the classifier assembly, flow source, coarse and fine fraction collectors, feed system and controls. Component selection and design are application-specific and can be customized to meet specific requirements.

AVEKA CCE Technologies will work closely with you to understand your needs and which model(s) bet fits your application. AVEKA CCE engineers will work with you to customize the system to fit well within your process and bring value to your project, ensuring your needs are met with the right precision equipment.

Predicting whether a material will respond to air classification successfully can be difficult and often surprising, so it is always worth a feasibility trial to find out.

Capabilities and Equipment Specs

Model No

100

250

500

PERFORMANCE RANGE*

Cut Size (D50), Microns**

1-30

1-50

2-50

Sharpness (D25/D75)

.6-.8

.6-.8

.6-.8

Feed Rate, kg/hr.

to 15

to 225

to 900

*Depending on feed material characteristics, desired cut size, and solids loading.

**At particle density of 2.6 gms./cc.

OPERATING RANGE

Rotor Speed rpm

700-7000

400-4000

360-3600

Primary Air Flow, scfm

to 70

to 250

to 800

Max. Operation Vac, In. Hg

12

12

12

Rotor Drive, HP

1.5

3

15

Primary Flow Source, HP

7.5

25

75

Compressed Air scfm @100 psig

6

12

40

Factors to Consider
  • What is the particle size of the feed material?
  • What is the target particle size?
  • Is the material a combustible powder?
  • Is the material abrasive?