Jigging beneficiation is carried out in a jigging machine. The basic structure of all types of jigging machines is similar, and its selection process is carried out in the jigging chamber. The middle layer of the jigging chamber has a screen plate, from which a vertical alternating current is periodically fed under the screen plate, and the ore is given to the screen plate, forming a dense layer of material called the bed, through which the water passes through the screen plate and the bed. During the rise of the water flow, the bed is lifted and loosened, the light minerals rise faster with the water flow, and the heavy minerals rise slower; and when the water flow falls, the light minerals fall slower, and the heavy minerals fall faster. In this way, heavy minerals tend to the bottom, light minerals are located in the upper layer. As the current continues to fall, the bed looseness decreases, and the movement of coarse particles is hindered. Later, the bed is more and more tight, only fine mineral particles can move down through the gap, called "drill gap movement". The downward water flow stops, the stratification effect also stops, this is a cycle. Then the water begins to rise again, the beginning of the second cycle. So the cycle has been, drunk after the density of ore particles concentrated in the bottom layer, the density of small ore particles are located in the upper layer, completed the density stratification process, with the discharge device were discharged, you can get the product of different densities. Above is the jigger ore dressing sorting process and principle.