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Factors That Affect Screening Efficiency of Vibrating Screen

2017-12-01 18:03:17   XinHai    Views (1869)
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round vibrating screen

Screening effect and efficiency of vibrating screen can affect the output and production efficiency of the whole production line. So Xinhai will analyze some reasons that affect vibrating screen.

One. Ore Property

1. Water content

Experiments show that adding surface active material to water containing material can increase the activity and dispersibility of materials, and improve the screening condition. Besides, using the screen deck that is made up non-hydrophilic materials also can improve the screen efficiency.

2. Silt content

The soil is easy to knot and lock the mesh in the screening process. Clayey materials and viscous materials can only be screened with large mesh in some special cases. Wet screening is spraying water on the material that is moving along the screen deck, and pre-desliming before screening.

3. Particle characteristic

The particle characteristic mainly refers to the content of various grained materials that have specific influence on the screening process. When the difficult screening material is much more than other fractions, the screening process is better. The particle characteristics also include the shape of particles. It is easier to screening for those particles who have close three-dimensional size, such as spheres and polyhedrons. In other conditions, it is more difficult to screening for those particles with large different sizes, such as slice, strip and weird shape.

4. Density characteristics

There is no effect on screening effect if all particles are same density. However, if the density of coarse and fine particles are different, the situation is totally different. If the coarse-grained density is small, then fine-grained density is large. In contrast, coarse-grained density is larger and fine-grained density is small.

Two. Screen Performance

vibrating screen mesh

1. Movement type of screen deck

Movement type of screen deck is related to the looseness of oversize material layer and the speed, direction and frequency of screen motion. In the vibrating screen, movement type of screen deck is divided into several kinds of forms: circular vibration, linear vibration and elliptical vibration. Xinhai has developed a series of vibrating screen with high screening quality.

2. Structure parameters of screen deck

screen mesh

A. Screen width and length

In general, the screen width directly determines the processing capacity of screen. The wider the screen, the larger the processing capacity. The screen length determines the screening efficiency. The longer the screen, the higher screening efficiency. When the scree length reaches a certain size, the screen efficiency will be rarely increased, or even no longer increases. And if you increase the screen length now, only the size and quality of screen are increased.

B. Screen slope

Screen slope has a great influence on screen strength. The larger screen slope, the smaller particle size, the smaller screen slope, the larger particle size. In order to exclude oversize material easier, sometimes the screen deck should be installed obliquely. The larger slope, the faster material layer moves on screen deck, the greater productivity. But the time that material stay on the screen deck is shortened, which decreases the screen-penetrating probability and reduces the screening efficiency.

C. Size, shape and screen porosity

The larger screen, the higher unit area screening efficiency and the higher screening efficiency. In general, the larger mesh size, the higher porosity of screen. When the mesh size is certain, the larger porosity of screen is more beneficial to screening. However, but porosity of screen is often limited by screen strength and service life.

3. Operating condition

For certain screen and raw materials, the operating condition mainly refers to the quantity and mode of feeding. Continuous and even feeding is the best feeding method. In addition, please timely clean and maintain screen deck, which is also conducive to screening effect.

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