Hydraulic grading is a process of dividing a wide-scale ore particle group into several narrow-level particle sizes according to the difference in the sedimentation speed of the ore particles in water. It is apparent that the classified products are equal-falling particles having the same settling velocity, that is, the particles having a large density are small, and the particles having a small density are large.
The main use of hydraulic grading in mineral processing :
(1) As a preparatory work before re-election, such as the use of hydraulic grading products for the feeding of the shaker, this can reduce the influence of particle size on the sorting;
(2) Forming closed-circuit grinding with the grinding machine to control the particle size of the grinding product;
(3) for containing clay minerals and placer quality (such as sand gold, tungsten, manganese, iron, tin, etc. placer), desliming can be used;
(4) Concentration and dehydration of mineral processing products.

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