How to Measure the Sieve Efficiency of Screening Machine?

In actual production, the screening machine is easy to wear, some materials which are larger than the mesh size, always into the product through the mesh sieve. Given this situation, according to the following formula to calculate the screening efficiency:

screening machine

E = β (a-θ) / a (β-θ) × 100%
Where β is contained in less than sieve product level content, %; a is the raw material which is smaller than the level of the percentage, %; θ is the product contained less than sieve content pore size grain level, %.
Screening efficiency measurement method is as follows: in the sieve stream and on screen 15 to 20 minutes to take a sample, should be 2 to 4 hours of continuous sampling, the sample will be made in the average check sieve sieve stream in every other points, the same check screen mesh production and use of a mesh sieve. Respectively determined a, θ, into the formula can be obtained in the screening efficiency. If there is no measured with a sieve of mesh size equal to inspect sieve, sieve set can be used as a screening analysis, and the results are plotted sieve analysis curve, then determined by a sieve analysis graph the percentage of the class a and θ.
All materials are sometimes used to calculate the kid sieve screening efficiency. The results thus calculated is called total screening efficiency. Sometimes only one of several size fractions for the calculation, the result is called part of the screening efficiency calculated. All less than sieve materials, including easily tapping and tapping difficult, so the overall screening efficiency is screening efficiency of these two types of particles formed. If part of the screening efficiency is obtained by easily tapping, it must greater than the overall screening efficiency; if it is calculated with difficult tapping it smaller than the overall screening efficiency. In the calculation, the need to make a distinction between the overall screening efficiency or partial screening efficiency.zrf

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