Extrusion Granulation Method of Organic Fertilizer Granulation

 

Extrusion granulation method is a granulation process in which materials are directly extruded into finished products. Its main feature is to reduce energy consumption and simplify the process flow. Since the product is always kept dry, the drying and cooling process of the group legislation can be omitted, a large amount of nitrogen loss can be avoided, and the problem of secondary environmental pollution can also be avoided. 

The working principle of extrusion granulation is as follows. The vertical shaft rotates at a certain speed, driving the roller fixed on the vertical shaft to revolve around the center line of the vertical shaft, and the rollers respectively rotate around their own core shafts. There is always a pre-adjusted working gap between the roller and the template, and there is no small through hole on the template. The uniformly mixed materials are continuously and quantitatively fed into the upper casing of the granulator through the material device. Using the affinity between the material molecules, the material is rubbed, compressed, and extruded in the small holes of the template under the forced extrusion between the roller and the template to form a cylindrical shape. Then through the cutting force of rotation, it is cut into the required short cylindrical particle shape.

The key to using extrusion granulation is to control the moisture of the material entering the silo, generally 25% to 30%. Before the material enters the extrusion granulator, it is best to be screened to remove the impurities entrained in the material to avoid damage to the machine. The feed of the extrusion granulator is monitored by the stability of the ammeter pointer in the electrical control cabinet. It should be noted that the physical and chemical properties of each single basic fertilizer are different, and the load current during extrusion granulation is also different. Before each shutdown, the materials in the machine should be squeezed.

There are many extrusion granulator machine like falt die granulator machine in FPC. Click here to get money-saving flat die granulator.