Hydrocyclone is also called cyclone separator.Hydrocyclones include hydrocyclone desander(10 in. cone) and hydrocyclone desilter(4 in. cone),which used to separate sand and silt from the drilling fluid.
Hydrocyclone has two exits on the axis: the smaller on the bottom (underflow or reject) and larger at the top (overflow or accept). The underflow is generally the denser or thicker fraction, while the overflow is the lighter or more fluid fraction. Centrifugal pump is used to pump the drilling fluids from mud tank into the set of hydrocyclones.
Hydrocyclone is one of the most important devices in the minerals industry, it is widely used in the mineral industry processing as a classifier, which has proved extremely efficient at fine separation size. Hydrocyclone is widely used in closed circuit grinding operations but it also has many other applications, such as desliming, degritting, and thickening.