Different Particle Sizes Decide Different Screening Ways

Different particle sizes decide different screening ways

Different particle sizes decide different screening ways

The basic working process of sand production line can be mainly divided as follows:

Firstly, the stone materials are evenly conveyed to jaw crusher by vibrating feeder for a coarse crushing, the coarse crushing materials will feed into sand making machine for further crushing. Then the crushed materials can be transported to the vibrating screen for screening. The finished product reaching the requiring size will be conveyed into the sand washing machine for washing, the washed product will output by the conveyor, which is the final finished product; The finished product not reaching the requiring size will return to re-processing from the vibrating screen, which forming a closed loop many times. The size of the final finished product can be combined and graded according to users.

ore, coal, building stone and other mineral raw materials that mined from mining machinery operation are composed of particles of different sizes; a bunch of different grain size materials can be divided into several levels of granularity range, that is particle size. According to the quality of various size, and mass percentage can express the content of each number of grain size, which is known as the particle size composition of the material. Before using or further processing, these materials often need be divided into several levels rely on the grain size, this job is called classification.

For the larger particle size materials, generally screen it on screen surface. The particle size is less than a sieve size, they through the sieve surface and fall to the bottom of the screen surface, these materials are known as the upper-sieve material. The materials of big particle size remain in the sieve surface, known as the lower-sieve material. This grading operation is called screening. There are mainly three kinds of screening order: first, from coarse to fine screening, second, from fine to coarse screening, third, hybrid screening, of course, every screening way has its unique features.

In the crushing operations, materials has been separated to qualified grain size to avoid excessive grinding, increase the processing capacity of the crushing equipment, reduce wear and power consumption, that is called screening preparation.

It makes materials have the right particle size to obtain a better separation effect, after being crushed, part of the material is greater than the discharging port of the crusher about 15%. Check screening is to screen this part of the material and return them to the crusher for re-crushing, thus constitute a closed-circuit crushing process. In the process of dressing and stone crushing, sometimes it is also need to remove impurities in the ore surface, this process is called beneficiation.

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by: nicole

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