Air classifiers: How they work and how to select one
Do you know how air classifiers operate and how to select one for your application? Read this article for information on how air classification works, how feed affects air classifier performance, and how to evaluate classification efficiency, throughput, and energy requirements. Final sections discuss typical air classifiers and applications and how to select one. Related information provides some technical background.
An air classifier is the most commonly used equipment for separating large dry particles from small ones. It can perform classification in the gravitational or centrifugal field. A gravity unit typically classifies powders from 20 microns to several millimeters; a centrifugal unit classifies powders from 1 to 100 microns.