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How To Choose A Suitable Fertilizer Granulator?

pellet mill machine

Different types of granulators

Different granulators granulate different granules. They can be spherical, rod-shaped, or round. In the field of organic fertilizer production, commonly used types of organic fertilizer granulators include rotary drum granulators, disc granulators, flat die pellet mills, and ring die pellet mills.

Below I will introduce to you relevant information about various granulation equipment.

Rotary drum granulator production line

  • Production capacity: 1-20t/h
  • Finished particle size: 1-10mm
  • Inside diameter: 1.2-2.2 m
  • Rotate speed: 17 r/min – 10.5 r/min

Rotary drum granulator is a molding machine that can mold materials into specific shapes. The drum granulator is suitable for cold and hot granulation and large-scale production of high, medium and low concentrations. The main working method is pellet wet granulation. Through a certain amount of water or steam, the basic fertilizer is fully chemically reacted after the humidity is adjusted in the cylinder. Under certain liquid phase conditions, with the help of the rotation of the cylinder, the material particles are The extrusion force is generated to form a ball.


  • Production capacity: 1-10t/h
  • Power: 7.5~37kw

Disc granulator features an arc structure for its granulating disc, facilitating a balling rate exceeding 93%. Employing flexible belt transmission for the reducer and motor ensures a smooth start, minimizes impact force, and enhances equipment longevity. The bottom of the granulation plate is reinforced with multiple radiant steel plates, fortifying its durability. With a thickened, weighted, and solid base design, the machine operates stably without requiring anchor bolts. High-frequency quenching is applied to the main gear, doubling its service life. This equipment boasts uniform granulation, a high balling rate, smooth operation, durability, and long service life, earning acclaim from users and standing as an ideal choice.

flat die pellet mill

  • Power: 37~48kw
  • Capacity: 400~600kg/h

Flat die pellet mill system is equipped with an automatic lubrication device for the main shaft rollers and bearings, operating in a sealed chamber to effectively isolate contaminants from the bearings and grease. This not only saves machine maintenance time but also extends the service life of the bearings.

In addition, the mill is equipped with a temperature detection device on the flat die, allowing the operator to monitor and adjust the feed volume as needed. To further improve performance, additional holes have been incorporated into the body to reduce the temperature inside the workroom. The transmission system uses a heavy-duty gearbox with spiral bevel gears to ensure smooth operation and provide huge torque.


  • Capacity: 1~13(t/w)
  • Motor Power: 30+2.2/45 (55) +4(kw)

One of the standout features of the Ring Die Pellet Mill is its robust transmission system. Utilizing heavy-duty gearboxes and high-quality bearings, this system ensures stable and efficient power transmission, enabling the mill to handle large volumes of raw materials with ease.

Equipped with an automatic lubrication system for the main shaft and bearings, the pellet mill operates smoothly while minimizing maintenance requirements. The sealed chamber design effectively isolates the bearings and grease from contaminants, thereby extending the service life of critical components.

Flat die pellet mill VS. Ring die pellet mill

Both flat die pellet mills and ring die pellet mills utilize the extrusion principle to compress organic materials into pellets. They demonstrate superior pelletizing efficiency for organic fertilizer raw materials such as straw, rice husks, cotton stalks, wood shavings, and cottonseed husks, which have low bonding rates and poor forming conditions. These machines extrude these materials into cylindrical pellets, resulting in significant energy savings. Additionally, to enhance the appearance of the pellets, a ball mill can be added after the pellet mill to smoothen the pellets.

pellet mill

What are the factors to choose a suitable pellet machine?

  1. Before choosing a suitable pellet machine, determine your production needs, including whether to pursue mass production or small-scale production.
  2. For mass production, consider a high-capacity pellet machine, while for small-scale production, choose a pellet machine suitable for small scenarios.
  3. Analyze the requirements such as shape, size, and density of the required particles.
  4. Select the most appropriate model based on the specific pellet characteristics required, as different pellet machines may be suitable for different shapes and sizes of pellets.
  5. Finally, consider budget and operational constraints to ensure smooth operation of the selected pellet machine under the existing operating environment and conditions.

No matter which compost equipment you choose, ABCMachinery can develop a feasible plan for you.


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