Because the stroke and the stroke to determine the speed and acceleration of the water flow, it directly affects the bed of loose and stratified state and the role of the water flow on the ore particles, so as to affect the effect of sorting. Generally for the sorting of coarse particle size, density, processing capacity, sieve refill water is small, can use a larger stroke and smaller stroke; when the particle size is small, thin bed is appropriate to use a smaller stroke and a larger stroke.

Under-screen water; under-screen water can increase the bed to send dispersion and reduce the intensity of the inhalation effect. Election of wide grade materials, the amount of water under the screen should be smaller, which can reduce the speed of the rising water flow, to avoid the large density of fine-grained materials are washed into the overflow. When selecting narrow grade coarse material, the amount of water under the sieve can be appropriately increased to make the bed loose.

Bed thickness: the bed can be divided into upper, middle and lower layers. The uppermost layer is the light mineral flow layer, the lowermost layer is the heavy mineral sedimentation layer, and the middle is the hyphen or transition layer. The thickness of the bed directly affects the quality and recovery rate of jigger products and equipment, to improve the processing capacity, the bed can be thinner; when the concentrate quality requirements are improved, the bed should be thicker, this is because the bed is thicker than the particles are difficult to pass, the stratification time is long, and the quality of the heavy product is high. When dealing with fine-grained materials, and is discharged under the screen, need to lay artificial bed on the screen. Feed concentration, feed concentration is one of the factors that determine the horizontal flow rate of candidate materials in the jigging process. Suitable feeding concentration is generally 20% ~ 40% of the processing capacity, in general, should be in the premise of ensuring the concentrate grade and yield, try to improve the processing capacity. However, when the processing capacity exceeds a certain range, it will increase the loss of useful minerals in the tailings, when the concentrate taste requirements are high, the processing capacity should be relatively low.

The impact of the nature of the ore, the nature of the ore jigging equipment for ore dressing, the most important is the density composition and particle size composition of the density composition of the ore determines the selectivity of the material, the greater the difference between the density of the light and heavy minerals, the higher the efficiency of sorting. The particle size composition of the feed ore determines the nature of the bed, the resistance of the water through the bed, the size of the gap between the particles and so on. It has a great influence on the loosening and stratification of the bed. Screening classification is generally used before jigging.