There are mainly four types of classifier: high-weir single-spiral(or double-spiral)and submerged single-spiral(or double-spiral)classifier.

applicable scope of spiral classifier:

The spiral classifier is widely applied for the following fields: combine with ball grinder into closed circulation for ore-sand separation in the ore separation plant; classify ore sand and fine sludge in gravity ore separation plant; classify the grain of ore pulp at the metal ore separation process; and remove sludge/water at the ore separation process. it has various excellent characteristics, e.g.simple structure, reliable running and easy operation. It mechanically classifies through the mechanism of different sedimentation speed of solid particle in liquid due to different size and different specific gravity: the fine ore grain floats in water for overflowing; and the coarse one sediments onto tank bottom and then is pushed upwards by spiral for discharging. It can classify the ground material powder from the grinder, spiral the coarse grain into material inlet of grinder through the spiral chip, and discharge the classified fine grain from overflow surface. Its base is made from channel steel, and its body is welded from steel plate. The lower support of spiral bearing is of engine-bearing structure of good wear-resistance and durability. The lifting device is of electric and manual mode.

Working mechanism of spiral classifier:

The spiral classifier mechanically classifies through the mechanism of different sedimentation seed of solid particle in liquid due to different size and different specific gravity: the fine ore grain floats in water for overflowing; and the coarse one sediments onto tank bottom and then is pushed upwards by spiral for discharging. It can classify the ground material powder from the grinder, spiral the coarse grain into material ,inlet of grinder through the spiral chip, and discharge the classified fine grain from overflow surface.

Structure of spiral classifier:

The spiral classifier is mainly composed of driving device, spiral body, tank body, lifting unit, lower support(engine bearing)and ore discharge valve.