A cyclone is a conical vessel in which coal along with finely ground magnetite (media) is pumped tangentially to a tapered inlet and short cylindrical section at a predetermined flowrate and pressure followed by a conical section where the separation takes place. The higher specific gravity fractions being subject to greater centrifugal forces pull away from the central core and descend downwards towards the apex along the wall of cyclone body and pass out as rejects/middlings through the underflow orifice discharge, also known as the spigot. The lighter particles are caught in an upward stream and pass out as clean coal through the cyclone overflow outlet via the vortex finder. From the overflow orifice, the coal goes into the overflow chamber, and is discharged to the next stage of the process.