Three factors affecting the work of jig

(1) The structure of the jig structure The structure of the jig has a great influence on the selection index, and should be fully considered when designing and manufacturing:

1The screen area of ​​the jigging room is an important factor affecting productivity. Increasing the screen area can increase the productivity; 2The size of the mesh should be based on the feed size and heavy product discharge mode.

To determine; 3 the number of jigging rooms depends on the nature of the materials selected, the amount of ore and the quality of the product; the 4-stroke coefficient (the ratio of the diaphragm area to the screen area) determines the uniformity of the water flow distribution, the greater the value The more uniform the distribution of water flow; the height difference between the two sieve plates before and after 5, that is, the size of the drop directly affects the speed of material flow. When the material is selectable, the drop can be larger, the material is difficult to select and the product quality requirements When high, the drop should be small.

(2) Operation due to home

1 stroke and stroke are one of the important factors affecting the selection index. Because stroke and stroke determine the velocity and acceleration of the water flow, it directly affects the loose and stratified state of the bed and the effect of water flow on the ore particles, so that the influence To the sorting effect. Generally, when the sorting particle size is coarse, the density is large, the processing amount is large, and the amount of water added under the sieve is small, a larger stroke and a smaller stroke can be used; when the particle size is small and the bed is thin, it is preferable to use a smaller one. The stroke and the larger strokes.

2 Under the sieve, adding water to the water can increase the looseness of the bed and reduce the strength of the suction. When selecting the wide-grade material, the amount of water under the sieve should be smaller, which can reduce the rising water flow rate and avoid the large-density fine material. It is flushed into the overflow. When selecting a narrow grade of coarse material, the amount of water under the sieve can be appropriately increased to loosen the bed.

The bed of 3 bed thickness can be divided into upper, middle and lower layers. The uppermost layer is a light mineral flowing layer. The lowermost layer is a heavy mineral sedimentary layer, and the middle layer is a continuous body or a transition layer. The thickness of the bed directly affects the quality and recovery rate of the jig product. Generally speaking, when the density difference between heavy minerals and light minerals is large, in order to speed up the stratification speed and increase the throughput, the bed can be thinner; When the quality of the concentrate is high, the bed should be thicker. This is because the bed is thick and difficult to pass, and the stratification time is long. The quality of the heavy production is high. When the material is finely pulled, it is also under the sieve. , the artificial bed layer should be laid on the sieve.

4 The concentration of ore to the ore concentration is one of the factors that determine the horizontal flow rate of the candidate material during the jigging process. The suitable concentration of ore is generally 20%-40%.

5 Generally speaking, the processing volume should be increased as much as possible under the premise of ensuring the grade and recovery rate of concentrate. However, when the treatment amount exceeds a certain range, the loss of useful minerals in the tailings is increased. When the concentrate grade is required to be high, the treatment amount is correspondingly reduced.

(3) Influence of ore properties The nature of the ore is the most important for the jigging beneficiation .

The density composition of the ore determines the selectivity of the material. The greater the density difference between the light and heavy minerals, the higher the sorting efficiency.

The comparative composition of the ore is determined by the nature of the bed, the resistance of the water through the bed, the size of the gap between the Russian positions, and the like. It has a great influence on the looseness and delamination of the bed.

Screening is generally used before jigging.

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