Jig machine is a separation machine with deep tank, which is developed according to the law of layer theory of jigger bed stratification, and on the basis of traditional jigger. The performance of jigging machine has reached the domestic advanced level, and is one of the ideal devices in energy-saving gravity separation. When processing the open-pit mines, the jigging machine is a key machine with the principle of gravity separation. jigging machine pulse curve is like saw-tooth waveform to make rising water faster than the dropping water; enhanced the loose of bed, eased the inhaled role, so that heavy particles in the mineral can fully settlement, greatly improving the sorting capacity and recovery rate of equipment.

Water and raw ore will be fed from one end of the jigger screen, the ore granules will move in the vertical alternative water-flows. Layers will be formed because of density difference of materials. The minerals with small density will be in the up layer and will flow together with the up pulp flow while material with bigger density will be in the down layer and will discharged from the down discharging port as jigging concentrate.