Drum Granulator

Excellent Compound Fertilizer Made by Our Drum Granulation Equipment!

Rotary drum granulator is a molding machine that can make material to a specific shape. It is also one of the key equipment in compound fertilizer industry. Furthermore, this machine has good appearance quality, corrosion and wear resistance, low energy consumption, long service life, simple operation and maintenance, etc.

Our company specializes in producing compound fertilizer granulating equipment, and can customize the entire production line to meet your specifications. Similarly, our main components and wearing parts are constructed of high quality wear-resistant materials and advanced processing technology, so that the equipment is durable and wear-resistant, is well sold at home and abroad, and the majority of users recognize us as good service!

Drum Granulator for Compound Fertilizer Production

What Is The Application of Drum Granulator?

Batching Machine for BB Fertilizer Production

Rotary drum granulator is generally used for fertilizer granulation, especially for large compound fertilizer production lines. The final quality of fertilizer granulation manufacture is guaranteed due to regular particle formation. In addition, it can also be used for various forms of granulation, including hot and cold granulation and the production of high-medium-low concentration compound fertilizer, especially two nutrients compound fertilizer (NP, NK, PK) and NPK fertilizer.

Raw materials with low solubility include calcium chloride, ammonium sulphate, potassium sulphate, potassium chloride, etc.; high solubility are urea, ammonium nitrate, ammonium phosphate, etc. It can also be combined with some organic matter and medium and micro elements as needed.

Construction of Drum Granulator

  • The support part bears the majority of the machine’s weight. To satisfy its high pressure resistance, this part we design is comprised of medium carbon steel plate and channel steel welded together, and it has strict quality control and special process requirements.
  • Furthermore, the important thing is the riding wheels fixed on the frames. Considering that it will produce large friction with the belt, our factory specially selects excellent anti-corrosion and wear-resistant materials, which considerably extends the service life of this machine.

The drive part, which consists of high quality channel steel, is an essential aspect of the entire granulation process. Moreover, the main motor and reducer installed on the drive frame are made of ISO national inspection-free products with reliable quality.

They are fixed on the machine body and run relative to the pinion gears, which work together to keep the machine running smoothly. More importantly, the usage of advanced wear-resistant materials extends the service life.

It is fixed with both sides of the machine to support the whole body of the rotary drum granulator.

It is the central part of the machine and made of the superior medium carbon steel, with a built-in unique rubber liner or stainless steel liner that are resistant to wear and corrosion.

The Operation Way of Drum Granulator

The main operation way is wet type granulation:

  • on one hand, you can admit stream and ammonia gas access, or add with phosphoric acid or nitrogen solution, phosphoric acid slurry, etc., to complete the compound fertilizer granulation process of chemical reaction and heat supply in the cylinder;
  • on the other hand, you can choose the cold granulation process of compound fertilizer that takes a small amount of moisture supplement.

The materials required for granulation are agglomerated into balls by the rotating movement of the cylinder, which generates extrusion pressure between the particles at a certain humidity and temperature.

Structure of Drum Granulator

How Does A Drum Granulator Work?

  • The main motor drives belt and pulleys, and the reducer drives the drive shaft. The split gears installed on the drive shaft engage with large gears fixed on the body.
  • The raw materials enter the inlet through the conveyor and get better mixing and granulation effect with the continuous rotation of the drum.
  • Under the action of extrusion pressure and rolling, the powder becomes particles. Besides, you need spray certain liquid, making other powder around it attaching to form the final products.
  • You should position the machine at a slight angle to facilitate granules discharge from the outlet.

Features of Drum Granulator

  • High output, with granulation rates of up to 70%. A little amount of return material, which is small in size and can be re-granulated.

  • Heating raw materials by adding steam and water vapor, which reduces the moisture content of raw materials and improves the efficiency of the drying process.

  • The inner wall of the drum is lined with rubber or polypropylene plate, which makes raw materials not easily adhere to the drum.

  • Low investment, quick outcomes, high economic efficiency, and consistent performance.

  • Visualization of workflow. Workers can solve the problems arising in the granulation process in time.

Design Parameters of Rotary Drum Granulator










Rotary Speed (r/min) Capacity (t/h)
SXZGZ-1240 5.5 1200 4000 2-5° 17



11 1500 6000 2-5° 17.5 3-5


15 1800 7000 2-5° 11.5 5-8
SXZGZ-2080 18.5 2000 8000 2-5° 11




3200 10000 2-5° 9.5


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