The reasons low screening efficiency of airflow sieve

　　1. Diameter of the sieve wire: The smaller the diameter of the sieve wire, the more the amplitude of the sieve reduction rate is sharper.

　　2. Mesh size: The larger the size of the mesh, the more obvious the decrease in the permeable rate.

　　3. Screen inclination angle: The curve shape of the sieve reduction rate is basically the same, indicating that the influence of different inclination angles on the sieve is relatively small.

　　4. Width of sieve surface: The smaller the sieve width, the greater the decrease of the sieve speed, indicating that the sieve width is too small to facilitate the sieve.