Fertilizer is an indispensable part of modern agriculture, and the fertilizer granulator is a key link in fertilizer production. Fertilizers with different contents provide suitable K, P, N and other elements for different crops and soils. A variety of fertilizer granulators also offer producers diverse choices. Understanding the working principles of different granulators can help you select the right machine. In the following text, we will discuss the differences between different fertilizer granulators and their working principles.
Types of Fertilizer Granulators
1. Double Roller Extrusion Granulator
The double roller extrusion granulator uses two counter-rotating rollers to compress the material into a cake-like shape under strong extrusion force. Subsequently, the cake-like material is crushed by a crushing device and then sieved to obtain granular products of the desired size.
2. New type organic fertilizer granulator
The new type organic fertilizer granulator uses the mechanical stirring force generated by high-speed rotation and the resulting friction force to continuously achieve mixing, granulation, spheroidization and strengthening of powder materials inside the machine, thus achieving the purpose of material granulation. It is mainly used for granulating various organic materials after fermentation. It breaks through the conventional organic material granulation process and does not require drying of raw materials. The raw material moisture content can be around 30% - 40% for granulation.
3. New type of two-in-one granulator for organic fertilizer
The new type of two-in-one granulator for organic fertilizer is designed and manufactured based on the new wet continuous push-rod granulation process. By utilizing the mechanical stirring force and the friction force generated from the high-speed rotation, the fine powder materials can continuously undergo processes such as mixing, granulation, spheroidization, densification, and polishing inside the machine, thereby achieving the purpose of granulation.
4. Organic Fertilizer Dual-mode Granulator
The organic fertilizer dual-mode granulator adopts gear-belt transmission, which has a higher production efficiency and a 15% or more increase in output compared to traditional granulators. It is mainly used for granulating (biological) organic fertilizers, compound fertilizers, and animal husbandry processing industries. The finished granules have a smooth surface, moderate hardness, low temperature rise during processing, and can better retain the various nutrients inside the raw materials.
The flat die pelletizer adopts direct drive transmission. Under the effect of friction, the pressure roller rotates automatically. The powder material is extruded from the die holes under the pressure of the pressure roller. The finished columnar pellets are discharged through the slinger. The length of the columnar pellets can be controlled by adjusting the cutter, and the columnar pellets can also be rounded and shaped into spherical pellets.
6. Drum Granulator
The drum granulator is driven by the main motor to rotate the cylinder. Materials are fed from the feeding end. Inside the cylinder, steam or water mist is used to adjust the humidity and temperature, allowing the powdered materials to agglomerate into balls under the action of extrusion force. As the cylinder rotates, the particles gradually increase in size and roll to the discharge port, achieving a continuous and efficient granulation process. It is suitable for large-scale production.
7. Hydraulic Double-Roller Granulator
The hydraulic double-roller granulator adopts dry roller pressing technology. It mainly relies on the pressure feeding and pressurization method to force the material through the gap between two relatively rotating rollers, compressing it into sheet or block shapes. During the roller pressing process, the actual density of the material can increase by 1.5 to 3 times. It is suitable for compressing powder materials with a moisture content of ≤5% into sheets or blocks to meet the particle strength requirements. Then, through the processes of crushing, shaping, and screening, the sheet or block materials are transformed into granular materials that meet the usage requirements.