Spiral classifiers

classificator_spiralniy_wm   

Spiral classifiers are characterized by simplicity of design, big productivity and efficiency in operation. They have gained the greatest distribution at wet processes of enrichment of sand. The spiral classifier represents a box which main working part is the spiral device. At rotation of a spiral effluent swells up; the draining containing fine particles is taken away in the lower part of a box through a stabilizing lip, and coarse particles go a spiral to an upper unloading window.

Spiral classifiers with not submerged spiral (with a high flight) and with submerged spiral are distinguished. Classifiers in which the flight is located below an upper edge of a spiral on the drain end belong to the first type.

In classifiers of the second type the lower end of a spiral is completely submerged in an effluent owing to what the upper zone of sedimentation of solid particles is in relative rest that provides more accurate classification. Classifiers of both types can be one spiral and two spiral and respectively differ in width of a tank and productivity with an identical length. The considered classifiers use generally for allocation in draining of particles of sand less than 0,15 mm in size, and also for dehydration of sand to a transportable state.

Parameters

SC-7,5

SC-10

1 Diameter of a spiral, mm

750

1000

2 Length of a box, mm

8000

9000

3 Rotating speed of a spiral, RPM

11-26

8-20

4 Box tilt angle, degree

17

17

5 Productivity, t/h

65

80

6 Weight, kg

6300

8600