Regardless of the model, the operation of the fertilizer screening machine revolves around the three core steps of "material conveying → screening and separation → material collection", which is the basic logic for achieving grading:

The fertilizer to be screened (such as granulated particles or powder raw materials) is evenly conveyed through the conveyor belt or feed inlet and enters the screening machine. The equipment will distribute the material evenly on the surface of the screen through structures such as "distributor" and "guide plate" to avoid uneven screening caused by local material accumulation.

The sieve is fixed inside the equipment (or moves with the equipment) for classification and separation, and the mesh size is set according to the "target particle size" (for example, when screening 2-5mm granular fertilizer, the mesh size is set to 5mm to intercept clumps larger than 5mm); Set up a 2mm mesh below to trap qualified particles of 2-5mm and leak fine powder less than 2mm. When materials move on the sieve, materials that meet the mesh size will pass through the mesh due to gravity or airflow, while unqualified materials will remain on the surface of the sieve.

The graded materials collected through different mesh holes (qualified particles, fine powder, impurities) will fall into the corresponding "collection hopper" or "conveyor belt" below and be collected separately - qualified particles will enter the subsequent packaging process, fine powder will be sent back to the granulator for further processing, and impurities will be directly discharged for processing, completing one screening cycle.