The work of the double roller granulator mainly includes two parts: one is extrusion and the other is granulation.

Extrusion: the dry material becomes a cake shape under the double roll extrusion of the double roller granulator. At this time, the density of the material is very large, and the space between molecules is very small, so it is not easy to enter into the air and be affected by moisture during the storage of the finished products in the future. In this process, the principle of intermolecular force in physics is also used to make the squeezed molecules freely combine into molecules with appropriate space density. Granulation: pressed into a cake of material in the roller extrusion granulator crushing, is divided into numerous small particles, to achieve the purpose of granulation. After strict extrusion and granulation, the utilization rate of raw materials of the extrusion fertilizer granulation machine can reach more than 85%. Since there is no processing in the middle, there is basically no three wastes discharged, which supports environmental protection.

Compared with other granulators, the biggest feature of the double roller granulator is its double roller. In material selection, the roller should be made of medium carbon steel plate with high hardness and strength, and welded by channel steel. After strict quality control and process requirements, lifting holes are set in the four corners of the frame, so as to be used in loading, unloading and transportation.