classifier
classifier
A machine or device for separating the constituents of a material according to relative sizes and densities, thus facilitating concentration and treatment. Classifiers may be hydraulic or surface-current box classifiers (spitzkasten).
The term classifier is used in particular where an upward current of water is used to remove fine particles from coarser material.
In mineral beneficiation, the classifier is a device that takes the ball-mill discharge and separates it into two portions--the finished product, which is ground as fine as desired, and oversize material.