Granular fertilizer production technology

Flat die extruder is an important machine for organic fertilizer production. It uses extrusion for granulation, which plays an important role in fertilizer manufacturing technology. In our usual production activities, the methods of fertilizer granulation are various. To help you better understand the process of extrusion granulation, the main methods of extrusion granulation are explained below.

The flat die extruder uses pressure to gather solid materials, and then extrudes the material through rollers, which are driven by eccentric casing or hydraulic system. When extruding the solid material, the air between the powder particles is removed first, and the particles are rearranged to eliminate the gap between the materials.

The extruding granulator shall prevent the powder material from being in the extrusion granulation equipment, and then use external force to compress the powder material tightly. Due to the different ways of using external forces, molecules are reassembled, resulting in cylindrical particles. In the chemical fertilizer manufacturing technology, the whole process of production and extrusion is mechanical operation, without manual operation. Compared with stirring granulation, the shape of material is mainly made by stirring method, which is round.

Flat die extruder granulator

Double roller granulator is also used for extrusion granulation. It is commonly used in fertilizer manufacturing processes, such as compound fertilizers. The thickness of the large plate produced by the roller granulator is 5-20 mm, and the surface density is 1.5-3 times of the feed. Large plates are peeled, crushed and screened to obtain the desired granular products. The pressure formed particles form a hot spot at the contact point and melt the material. When the temperature drops, the material is cooled to form a fixed bridge.

The above is a detailed introduction of extrusion granulation method, which can help us to know more about it, so as to produce qualified granules in fertilizer production. There are many granulation methods in fertilizer processing technology, extrusion granulation is a common method.