NPK Fertilizer Drum Granulation Line
The core equipment of the NPK granular fertilizer production line is the drum granulator. Through the wet agglomeration process, the drum granulator utilizes the extrusion force generated by the rotation of the cylinder and liquid-phase conditions to agglomerate NPK raw materials (such as Nitrogen, Phosphorus, and Potassium, etc.) into spherical granules. The interior of the equipment is lined with rubber sheets or acid-resistant stainless steel liners, enabling automatic scar removal. This design eliminates the traditional scraper device and reduces material adhesion
Parameter
|
Model
|
Inner diameter
(m)
|
Inclination
(° )
|
Rotation speed
( r/min )
|
Power
( kw)
|
Capacity
( t/h )
|
|
ZG1240
|
1.2
|
2-5
|
4.7
|
5.5
|
1-3
|
|
ZG1450
|
1.4
|
2-5
|
5
|
7.5
|
3-4
|
|
ZG1560
|
1.5
|
2-5
|
5
|
11
|
5-8
|
|
ZG1870
|
1.8
|
2-5
|
3.9
|
15
|
8-10
|
|
ZG2080
|
2
|
2-5
|
3.9
|
18.5
|
10-15
|
|
ZG2290
|
2.2
|
2-5
|
3.2
|
22
|
15-20
|
|
ZG24100
|
2.4
|
2-5
|
3
|
30
|
20-25
|
Process Flow of the Drum Granulation Production Line
1. Raw Material Batching
Raw materials such as phosphoric acid, ammonia gas, triple superphosphate slurry, and potassium fertilizer are mixed in proportion to ensure balanced nutrient content. For example, the concentration of phosphoric acid needs to be ≥40% P₂O₅ (for DAP production).
2. Granulation Stage
Ammoniation Granulation: Ammonia gas is injected into the drum, where it undergoes a neutralization reaction with phosphoric acid. This raises the temperature of the slurry and promotes granule formation.
Cold Granulation Process: A small amount of water is added, and granules are formed through mechanical extrusion. This process is suitable for low-concentration compound fertilizers.
3. Post-Processing Procedures
Drying and Cooling: Granules are sent to a dryer to reduce moisture to a safe range, then passed through a cooler to prevent caking.
Screening and Coating: Oversized/undersized granules are screened out, and qualified products are coated to improve appearance and storage stability.
Quantitative Packaging: Automatic packaging machines complete the sub-packaging of finished products, with an error rate of <0.5%.
4. Return Material Recycling
Unqualified granules screened out are returned to the granulator for re-granulation. The return material ratio must be stable to maintain system balance.
5.Dust and Exhaust Gas Treatment
The exhaust gas from the dryer and cooler is treated through cyclone dust collection + dilute phosphoric acid washing, which reduces dust emissions and meets environmental protection requirements.
Q&A
Q: Does your factory offer after-sales service for the equipment sold?
A: Yes. We provide after-sales service coverage for all equipment purchased from our factory.
Q: How much NPK fertilizer can a drum granulator produce in one year?
A: The TIANCI drum granulator can produce 10,000 to 600,000 tons of NPK compound fertilizer annually. To meet customers' demands for higher output, we offer customization services.
Q: Could you please confirm whether installation services for the drum granulator are available following its purchase?
A: Yes. After the equipment arrives at your factory, we will send experienced engineers to your site to provide installation guidance and ensure the equipment operates normally.
Q: Could you please specify the hourly output range of your drum granulator?
A: The standard hourly output of our drum granulator ranges from 1 to 25 tons. If you have higher output demands (e.g., over 25 tons per hour), we can tailor a customized solution based on your specific production needs.
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