Classifiers are mainly spiral classifiers and hydrocyclones. They are widely used for classifying ore sands in the close-circuit process together with ball mill in the dressing plant, or for classifying ore sands and fine silts in gravity concentrator, classifying the particle size of ore pulp in metal beneficiation process, and for desliming and dehydration in ore dressing. The classifier is reliable and easy to operate with simple structure.

Hrdrocyclone is a device for classifying ore pulp by centrifugal force. It is equipped with motion power units and needs the installation of appropriate mud pump. It is mainly used for classifying, separation, concentration and desliming in ore dressing industry. The hydrocyclone is with low equipment cost, easy to assemble and disassemble, convenient for maintenance, covers small area and with low capital construction cost; it has large unit volume handling capacity, fine classifying particle size and high classifying efficiency. The volume and time for retention of ore pump in the hydrocyclone is less, and it is easy to handle at downtime.

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