There are two types of spiral classifier, single spiral classifer and double spiral classifier. According to the spiral blade at the flooding end, there are two types:

High weir type: the top side of spiral blade is higher than the flooding level and the center of blade is lower than the flooding level. This type is used for classification of the ore with flooding size between 0.083-0.15mm.
Immersed weir type: This type is used for classification of the ore with flooding size between 0.15-0.07mm.

Spiral Classifiers are suitable for:
Separation of fine particles and liquid from coarse particles; Separation of light particles from heavy particles; Separation of the particles into a number of products graded according to size; Separation of liquid from solid particles.

Main benefits of Spiral Classifiers:
Energy saving; Heavy duty, rugged construction; Powerful self-contained spiral lifting device; Continuous spiral raking; Optimal particle size range 800 to 75 microns.