Jigger is a kind of gravity beneficiation equipment that appeared earlier, and its working principle is based on the theory of gravity beneficiation. Although in recent years the application of jigger in the mineral processing industry is very wide, but there are still a lot of customers on the jigger is strange, and do not understand the working principle of jigger, the following for this problem for you to make a simple answer, I hope to help the relevant people.

Dynamic jigger working principle

       After crushing the raw ore to reach the jigger feed size range, and then through the feeding device uniformly into the jigger feeding slot, under the normal operation of the lower moving jigger pendulum swing up and down under the action of the eccentric linkage mechanism, by adjusting the eccentricity of the eccentric shaft to adjust the pendulum up and down to adjust the distance of movement, and by adjusting the speed of the motor to adjust the jigger strokes. The regular up and down swinging of the lower moving pendulum drives the tympanum and the lower moving vertebrae to move up and down, which in turn generates regular up and down fluctuations of the water flow in the jigger. Since the pulsation curve generated by the eccentric linkage mechanism is a sinusoidal curve, the water flow generated by this type of jigger is similar to the sinusoidal pulsation water flow. Sinusoidal pulsation curve in the jig machine to form a vertical alternating current force, into the jig machine sorting tank minerals in the vertical alternating media flow to be re-stratified under the action of the flow. Density of mineral particles in the water flow settling speed, in the material layer of the lower space, while the density of small mineral particles in the water flow settling speed is slow, in the material had the upper space, due to the density of the difference, the density of small materials is difficult to pass through the density of the material layer to enter the lower space, so the material will be roughly divided into two layers of material into the jigger, heavy minerals through the screen into the concentrate tank, light minerals into the tailings tank discharged. The heavy minerals enter the concentrate tank through the screen, while the light minerals enter the tailings tank and are discharged. The materials are continuously fed into the jigger, after sorting, and then discharged separately, forming a continuous jigging process.

  Working principle of hydraulic jigger

   When the jigger works, the raw coal and water (flushing water) are fed into the jigger together, and the raw coal is evenly distributed on the screen plate of the jigging chamber, forming a bed of thickness. When the compressed air enters the air chamber through the air valve, the rising water flow is formed in the jigging chamber, and the raw coal on the sieve plate is gradually loosened under the action of the rising water flow and rises with it. Jigger due to the relative density of coal is small, rising fast, washed by the water higher; gangue relative density is large, rising slowly, washed lower. This makes the original pressure in the gangue below the coal, part of which crosses the gangue and rises to the upper level. When the compressed air is discharged through the damper, the water naturally flows back, at this time in the jigging room to form a falling water flow, a variety of particles also fall. Jigging machine in which the relative density of the gangue first sinking, falling on the screen plate, while the coal is lighter, slower descending speed, falling on top of the gangue layer. Coal washing equipment after the end of the descending water flow, stratification that is engaged in the termination, the completion of the cycle. In each jigging cycle, coal and gangue mixture are subject to the role of sorting, after many repeated, stratification gradually tends to perfect. Jigger relative density of coal concentrated in the upper layer, the relative density of gangue will be concentrated in the bottom layer, and between the medium specific gravity of the coal is naturally distributed in the coal and gangue between. Jigger in the stratification process, the size and shape of the particles will have an impact on the stratification, thus increasing the complexity of jigging stratification. But as a result, it still can't change the essence of coal and gangue stratification according to relative density in the jigging process of jigging machine.

Working Principle of Dynamic Screen Jigger

       Dynamic screen jigger is directly driven by external force to make up and down movement of the screen plate in the water medium, resulting in periodic loosening of the material and realising stratification according to density. The difference between it and air pulsation jigger is: it does not use wind, flush and top water; secondly, the loosening degree is determined by the motion characteristics of moving screen. The water flow in the moving screen jigger is not pulsating, and when the moving screen rises, the particles have no relative motion relative to the screen plate in general. And the water medium relative to the particles is downward movement, moving screen down, due to the resistance of the medium, the water medium formed relative to the rising flow of the moving screen, particles in the water medium for interference settlement, to achieve the density stratification. Dynamic screen mechanism in the hydraulic cylinder drive, around the pin for up and down reciprocating motion. After the raw coal is fed into the moving screen mechanism, a bed is formed on the screen plate, and the moving screen makes upward and downward movements to loosen the bed, and after many times of jettisoning, the material realises stratification according to density. After stratification, the light material crosses the overflow weir, falls into the back section of the lifting wheel, and is discharged out of the machine by lifting the wheel and pouring it into the fine coal chute; the heavy product is discharged from the gangue wheel, and falls into the front section of the lifting wheel, and is discharged out of the machine by lifting the wheel and pouring it into the gangue chute; the fine-grained material through the screen falls into the bottom of cone, and is discharged out of the machine by discharging gate or dewatering bucket elevator.

Sawtooth wave jigger working principle

       The beneficiation process of the jigger is carried out on the inclined bed with compound bars, and the ore particles are fed into the feeding chute from the upper corner of the bed, and at the same time the transverse flushing water is supplied from the feeding chute, so the ore particles are stratified according to the specific gravity and granularity under the action of gravity, transverse water impulse, inertia and friction generated by reciprocating asymmetric movement of the bed, and move longitudinally along the bed and transversely along the inclined bed. Therefore, the ore particles with different specific gravity and particle size gradually flow down in a fan shape from side A to side B along their respective directions of movement, and are discharged from different zones at the concentrate end and tailings side respectively, and are divided into concentrate, medium ore and tailings. Sawtooth wave jigger is a kind of energy-saving re-election equipment developed and improved on the basis of traditional jigger according to the theoretical stratification law of jigging bed, whose jigging pulsation curve is in the form of sawtooth, which makes the ascending water flow faster than the descending water flow: the ascending time is shorter and the descending time is longer; it overcomes the defects of the ascending and descending water flow and the action time of the same produced by the sinusoidal wave, pulsating curve jigger and strengthens the loosening degree of the bed layer and eases the Absorption effect, so that the heavy mineral particles in the minerals are fully settled, greatly improving the separation ratio capacity and recovery rate of the equipment. Compared with the sinusoidal wave jigger, it can improve respectively: Sn 3.01%, W 5.5%, Pb 1.63%, Zn 2.04%; water consumption is reduced by 30%-40%, floor space is reduced by 1/3, and the stroke can be adjusted, and the stroke can be adjusted steplessly due to the use of electromagnetism adjusting motor for dragging. Its performance reaches the domestic advanced level, and it is one of the more ideal energy-saving re-election equipment.