1、Selection of shaking table
The selection of the shaking table should be determined according to the maximum particle size, processing capacity and planting area of the selected raw ore. When the feed particle size is greater than 0.2 mm, use a coarse sand vibrating screen, and when the particle size is 0.2~0.074 mm, use a fine sand vibrating screen. mm when using a mud shaker. The finer the particle size of the selected material, the larger the capacity of the shaking table.
For example, if the shaking table is used to process tin ore, the production capacity of the coarse sand vibrating screen is about 0.8-1.0t/h when the feed particle size is 0.5-0.2mm, while the production capacity of the 0.074-0.04mm sludge vibrating screen Only 0.2~0.3t/h. When the plant area is small and the single-layer vibrating screen cannot be opened, a multi-layer vibrating screen can be used.
2、Shaking table machine installation
The installation of the vibrating screen is required to be flat, there should be no abnormal jumping during operation, and the longitudinal direction is generally horizontal. When dealing with coarse-grained materials, the concentrate end should be 0.5° higher to improve the beneficiation effect; the ore tip should be lowered by 0.5° to facilitate the movement of fine-grained concentrate.
3、What are the Operation points of shaking table equipment ?
(1) Appropriate stroke and frequency
The appropriate value of the stroke and stroke is mainly related to the particle size of the selected material, and secondly related to the load of the shaking table and the density of the ore. When processing materials with large particle size and thick bed, use a large stroke and a small stroke; when processing fine sand and For sludge, the opposite is true, small strokes and large strokes should be used. When the load on the bed surface is increased or a material with a higher density is selected, larger strokes and strokes should be used. In practice it should be checked carefully to determine the appropriate stroke and stroke value.
(2) Suitable bed side slope.
When the side slope is increased, the sliding effect of ore particles is enhanced, and the tailing speed is increased, but the partition of the beneficiation area is narrowed. Generally, when dealing with coarse-grained materials, the transverse slope should be larger; when dealing with fine-grained materials, the transverse slope should be smaller. For example, the adjustment ranges of coarse sand, fine sand, and vibrating screen slope angles are 2.5°~4.5°, 1.5°~3.5°, and 1°~2° respectively. In addition, the lateral slope of the vibrating screen must match the size of the lateral water flow in order to have a good selection effect.
(3)The size of the flushing water should be appropriate.
The flushing water includes two parts, feed water and flushing water. The flushing water should be evenly distributed on the bed surface, and the size should be appropriate. The water quality of high-concentration flushing water is improved, but the recovery rate is reduced. Generally, when processing coarse-grained materials or selecting materials, the amount of flushing water should be larger.
(4) The amount of ore is appropriate and uniform.
The amount of ore is related to the selected particle size. The coarser the particle size, the larger the feed rate should be. For specific materials, the amount of ore feeding should be controlled so that the utilization rate of the bed surface is high, the partitions are obvious, and the tailings grade is within the allowable range. If the feed rate is too large, the recovery rate will be significantly reduced. In addition, once the amount of ore is accurately determined, it must be kept uniform, otherwise the division will be unstable, resulting in fluctuations in ore dressing indicators.
(5) The ore mass fraction is appropriate.
The ore mass fraction is generally 15% to 30%. Coarse-grained materials can be finer, and fine mud should be thicker. Most of the water in the mine flows downward along the tailings belt, and the fine mud is easily washed away, resulting in the loss of fine-grained metal minerals.
(6) Material preparation before material selection.
The upper limit of the particle size of the selected vibrating sieve is 2~3mm, and the lower limit is 0.037mm. Since the particle size has a great influence on the sorting index, materials should be classified before material selection. If the material contains a large amount of fine mud, it is not only difficult to recycle, but also due to the increase in the viscosity of the slurry, the sedimentation of heavy minerals will slow down, resulting in the loss of heavy minerals. Pre-desilting should be carried out at this time.You can also contact us directly or visit our Instagram Page.
(7) Material separation and product retention on the bed surface.
In the case of suitable operating conditions, it is obvious that materials are separated on a 6-S vibrating table, and the products are cut according to the required sorting index, which can be divided into 2 to 4 products, and medium mines generally need to be reprocessed. When the operating conditions change, the partition situation will change accordingly. At this time, the access location must also be adjusted accordingly to ensure the stability of the selected index. Therefore, vibrating screen operators must stick to their posts, closely monitor the partition situation, and make necessary adjustments at any time.