There are several elements to coal washing. Firstly, the water volume must be sufficient. As the saying goes, wind ensures quality and water ensures quantity. Insufficient water directly affects production. Secondly, the wind pressure must be sufficient, and a pressure gauge is essential. Only when the wind pressure meets the standard can a reasonable feng shui system be achieved. Thirdly, the bed thickness should be adjusted appropriately based on the particle size of the raw materials. Fourthly, the frequency of the air valve should be different depending on the particle size of the raw materials. Fifth, the amplitude of the bed layer. A reasonable amplitude can make the bed layer more layered, thus achieving the ideal sorting effect! Sixth, the inclination angle of the sieve plate. A reasonable inclination angle of the sieve plate is beneficial for the discharge and movement speed of heavy products. Seventh, the mesh size of the sieve plate