As one of the key equipment for gravity beneficiation, jig machine is favored by the majority of users because of its low beneficiation cost and simple process flow. Today, we will take you to understand the beneficiation process of the jig machine, as well as the suitable minerals, etc., so that you can better purchase and use the jig machine in the future.
As we all know, all gravity beneficiation equipment needs a separation medium. The medium used by the jig in the beneficiation can be either air or water. When the medium is air, it is called a wind jig; when the medium is water, It is called a hydraulic jig. At present, hydraulic jigs are widely used (metal ore concentrators are mostly hydraulic jigs), and wind jigs are relatively rarely used.

Jig beneficiation method:
Jig beneficiation is a beneficiation method that separates minerals according to different mineral densities. In the vertically ascending variable AC medium flow composed of strong vibration, the selected materials form a dense mineral layer on the screen plate of the jig, so that the ore particles are layered according to the relative density and light and heavy minerals are collected by appropriate methods. In order to achieve the gravity beneficiation process of separation, that is, the jig beneficiation process.

Jig adapted minerals:
Jig is one of the effective beneficiation methods for processing medium and coarse ores with large density difference, and is often used in the beneficiation of tungsten, tin, hematite, manganese, titanium, placer gold and other metal ores and coal.

When the jig is processing metal ore, the feeding particle size can reach 50mm, and the recovery particle size can be as low as 0.2-0.074mm. Under normal circumstances, the larger the relative density difference of the ore particle size to be processed, the smaller the particle size range, that is, the smaller the difference in the size of the ore particles, the better the sorting effect.
Jig coal preparation accounts for a large proportion in practical applications. According to statistics, the world’s annual coal preparation with jigs accounts for about 50% of the total coal preparation, and my country’s coal preparation with jigs accounts for about 70% of the total coal preparation. Moreover, using jig for coal preparation requires a wide range of raw coal particle size, which can be between 150-0.5mm; it can be selected either by classification or without classification. In short, the use of jig for coal preparation has strong adaptability. Except for the coal that is extremely difficult to select, jig treatment can be given priority.

Jig beneficiation process:
We mentioned above that the practical application of wind jig is less, because from the perspective of sorting effect, wind jig is far inferior to hydraulic jig. So the jigging process we talk about next is only a hydraulic jig.
The sorting process of the jig is realized in the jig chamber. There is a sieve plate in the jig chamber, and the sorted materials fall into the sieve plate of the jig chamber, which will form a dense material layer, which is often referred to as the bed layer. At the same time of feeding, the alternating water flow will be periodically fed from the lower part of the sieve plate to the upper and lower parts. When the water flow rises, the bed is washed up, showing a suspended and loose state. At this time, the materials on the bed, according to their own characteristics, move relative to each other and start to stratify; when the water flow turns to descend, although the bed gradually closes, the stratification continues. When all the ore particles fall back to the sieve plate, the stratification basically stops. At this time, only the ore particles with finer grain size and higher density are still moving downward, which is called “drilling gap movement”. When the descending water flow is completely terminated and the bed is completely compacted, the stratification is completely terminated. The time between the rise of the water flow and the complete end of the water flow drop and the complete termination of the stratification is called the jigging cycle. The stratification can only gradually improve after the mineral has undergone multiple jigging cycles. In the end, the low-density ore particles are concentrated in the upper layer, and the high-density ore particles are concentrated in the bottom to complete the density gravity stratification. Then they are respectively discharged from the jigger to obtain products with different densities.