Granulation is the most critical processing step in NPK compound fertilizer manufacturing. Good NPK compound fertilizer granulation equipment directly determines granule shape, strength, forming rate and production efficiency. Our fertilizer granulators are widely used for producing NPK compound fertilizer granules, suitable for small and medium fertilizer factories. We supply dry roller press granulators and wet rotary drum granulators according to customers’ raw material conditions and production requirements.
The core goal of granulation is to convert powdered NPK raw materials into solid round pellets. Powder NPK materials have poor fluidity and easily cake during transportation. Granulated NPK fertilizer is convenient for packaging, storage and field spreading. Dry granulation does not need steam or liquid binder, saving energy and simplifying the whole process. Wet granulation uses water or binder to help powder aggregate into granules, which requires subsequent drying and cooling units.
Roller press granulator is popular for NPK fertilizer dry granulation. Powder materials are squeezed between two pressure rollers to form flakes, then crushed and screened into uniform granules. This machine works without drying, lower energy consumption, simple process, low investment cost. It is ideal for NPK compound fertilizer, potassium salt and other chemical fertilizer granulation.
Rotary drum granulator adopts wet granulation technology. Powder materials roll inside the rotating drum with binder, gradually aggregate into spherical granules. It features high output and smooth round pellets. This type usually matches drying and cooling machines for continuous NPK fertilizer production.
Our NPK fertilizer granulation equipment adopts wear-resistant roller skins and thickened cylinder body. The forming rate can reach over 85% under proper raw material condition. The machine runs stably with low noise and easy maintenance. Quick-wear parts are replaceable, and spare parts supply is guaranteed. The granulator can handle different powder materials including urea, potassium chloride, ammonium sulphate and organic powder mixtures. Our equipment supports flexible adjustment of granule size according to customer requirements.
Place the granulator on a solid horizontal foundation to reduce vibration. Check the roller clearance and fasteners before starting each batch. Clean residual fertilizer powder after shutdown to avoid material hardening and corrosion. Regularly lubricate bearings and check gear system. Operators need to strictly follow operation manuals to avoid overload feeding, which protects the granulator and extends service life. We provide operation manual and remote technical guidance for all our granulation machines.
Q: What granule sizes can the NPK granulator produce?
A: Normally 2–6 mm, adjustable according to your requirements.
Q: Dry granulation or wet granulation for NPK fertilizer?
A: Dry roller granulator is lower cost; drum granulator gets better roundness with higher investment.
Q: Can this machine make organic NPK mixed fertilizer?
A: Yes, but raw material organic content should be controlled within a reasonable range.
Contact us to select suitable NPK fertilizer granulation equipment and get technical parameters and quotation.
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