Spiral classifier - apparatus in form of an inclined trough into which are placed one or two of the rotating shaft with the inserted them tape spirals formed on a screw line for separating the particle size of finely divided material in an aqueous medium in the beneficiation of ores of ferrous and non-ferrous metals and other mineral resources.

   It is used at the concentrators, which operates in a closed loop to the mill, it can also be used as a conveying and dewatering apparatus.