What is sieving probability？

The probability of the ore particles passing through the screen holes is called the sieving probability.

Generally speaking, the sieving probability is related to the following factors.

①Screen hole size.

② the relative size of the ore particles and the sieve hole.

③The effective surface of the sieve.

④The angle between the direction of movement of the ore particles and the screen surface.

⑤ water content and niobium content of the control.

Because the sieving process is a combination of many complex phenomena and factors, so it is not easy to use a simple mathematical formula to describe exactly, here only from the relationship between particle size and sieve hole size for discussion, and assume certain ideal conditions (such as particles are vertically into the sieve hole); to get the probability of particles through the sieve hole formula.

Loose material particle size is much smaller than the size of the sieve hole, after the start of sieving, soon fall into the product under the sieve, particle size and sieve hole size is closer to the particles, through the sieve hole takes longer time.

Therefore, the speed of the material through the sieve hole in the screening process depends on the ratio of the particle diameter to the size of the sieve hole.