Spiral separator is a better equipment for separating slime in modern times. It has the advantages of simple structure, high separation efficiency, no noise, no rotating parts, no power, less maintenance, long service life and so on. Now it has been paid more and more attention by people in coal preparation and environmental protection circles, and has been applied to coal preparation production in China.

In the spiral separator, the materials are basically sorted according to the density of light and heavy minerals under the complex action of axial liquid flow and radial liquid flow. In the spiral groove, heavy minerals gather at the inner edge and light minerals gather at the outer edge. Light and heavy materials and products are intercepted at the end. The separation effect is not only related to the properties of minerals, but also directly related to the structural parameters of spiral separator: inclination, pitch, diameter, section shape, etc.