Air Classifier

eatures

• Strong construction of mechanism and casing ensures long life.
• Close control over product uniformity.
• Minimum loss of fines in the tailings.
• Special liners are available for processing abrasive materials.

Advantages

The Air Classifier is a centrifugal type classifier used to separate dry powdered materials into fine and coarse fractions. It may be operated in closed circuit with a grinding mill or used in open circuit operation, receiving the feed from hoppers, bins screens.

Fineness Control

The classifier fineness characteristics are controlled mainly by changing the number, size of whizzer blades or by adjustment of vertical slide dampers. These adjustments can be conveniently made to produce the product of required fineness. Tyco classifiers are capable of delivering fine products from 80–85 % passing 60 mesh to as fine as 99.9% passing through 100 mesh depending upon the material characteristics.

Application in Closed Circuit Grinding

When operated in closed circuit, combination with a Pulveriser the separator skims off the fines as fast as they are made, so that the mill works only on fresh material without wasting power. The tailings are discharge back to the mill for further reduction. The reground material is returned to the separator with the feed, so that constant circulating load set up between the mill & the separator.

The Advantages in using Mechanical Air Separator in Closed Circuit with the Grinding Mill for Producing Closely Sized Finished Products include the Following

• Positive control of Fineness or surface area, and the elimination of over sized particles.
• For convenient variation of product fineness, vertical dampers permit wild range changes in fineness, externally while the separator is in operation.
• Increasing the capacity or output of the grinding mill performance, reports have shown increases from 25-75 % or more.
• Lowering the temperature of the mill & product.
• Improvement in grinding efficiency, as in the case of Ball mills where ball coating with the fine material can materially impair grinding ball effectiveness.