Pelletizing principle of extrusion fertilizer granulation process
According to the principle of extrusion fertilizer granulation process, the prepared dry powder or micro crystal raw materials with certain crystal water are extruded into thin sheets and then made into particles of the same size. The raw material is loaded into the hopper, and the oil cylinder on the feeding screw is adjusted by the pressure to form a preloading pressure. After conveying and compressing by the feeding screw, the density of the powder is doubled and pushed to the bite angle of the two extrusion rollers.
The raw materials are extruded into thin sheets by horizontally placed rollers, and the rollers with different surface shapes and their speeds are selected according to the characteristics of the materials.
The pressure device required by the material is linearly transmitted to the pressure roller of granulator machine for fertilizer, the hydraulic device can maintain a certain pre pressure, and the pressure roller arranged in parallel can ensure the consistency of material density.
According to different particle requirements, the mesh size of the screen in the granulation system of dry fertilizer pellet machine can be changed with each other.
Dry granulator technology is a major strategic innovation in granulation technology. In the process of granulation with strong pressure granulation, the powder is compacted to a dense state by applying external force in a limited space. The forces producing stable agglomeration include bridging force of flocs, adhesive force of low viscosity liquid, surface force and mutual cohesion. On the one hand, the success of agglomeration operation depends on the effective use and transfer of external force, on the other hand, it also depends on the physical properties of granular materials.