NPK Fertilizer Production Line with Double Roller Granulation for One-Step Forming, Energy Saving, and 12-15t/h Capacity

The Double Roller Extrusion Granulation Line is an advanced dry granulation system designed for the production of NPK compound fertilizer, organic-inorganic blended fertilizer, and BB fertilizer. Unlike traditional drum granulation lines that require drying and cooling, this line adopts extrusion technology to form granules at room temperature, eliminating the need for dryers, coolers, and fuel consumption.

With capacities ranging from 1 to 30 tons per hour (10,000-200,000 tons per year), this line offers a compact, energy-saving, and cost-effective solution for fertilizer manufacturers worldwide.

1. Batching System - Multiple bins with screw or belt feeders controlled by PLC for precise weighing.
2. Mixing System - Double-shaft horizontal mixer ensures homogeneous blending of N, P, K, and additives.
3. Granulation System - Double roller extruder presses material into high-density strips under 15-25 tons pressure.
4. Crushing System - Chain crusher breaks strips into small particles.
5. Screening System - Rotary drum screener separates qualified granules (1-6 mm) from fines.
6. Polishing System (Optional) - Spheronizer rounds granules for smooth surface and uniform shape.
7. Coating System (Optional) - Rotary drum coater applies anti-caking agent or functional coating.
8. Packaging System - Automatic scale bagger with sewing machine or heat sealer.

This line works with a wide range of fertilizer raw materials:

• Nitrogen sources: Urea (prilled or granular), ammonium sulfate, ammonium chloride, ammonium nitrate
• Phosphate sources: MAP, DAP, SSP, triple superphosphate (TSP), calcium-magnesia phosphate
• Potassium sources: MOP (potassium chloride), SOP (potassium sulfate), potassium magnesium sulfate
• Additives: Boron (B), manganese (Mn), zinc (Zn), copper (Cu), iron (Fe), anti-caking agents, binders (optional, usually not required)

• Simple machine structure
• Easy operation and maintenance
• One-time forming, no drying process, normal temperature granulation
• Double-shaft power output - each shaft drives its roller via coupling for synchronous counter-rotating operation, resulting in better granule formation and higher strength
• Simple ball socket alignment adjustment design, convenient for customer self-adjustment. Roller adjustment drawing and operation steps are provided
• All machines are tested and trial-produced by professional workers before leaving the factory