Dry Type Granulation Full Auto Operation Double Roller Fertilizer Production Line with 2.5-20mm Granular Size

In the commercial fertilizer trade, uneven particle sizes and high dust percentages directly lower your product's market value and trigger customer complaints. Our premium Rotary Screening Type Double Roller Fertilizer Granulation Line is meticulously engineered to establish perfect particle uniformity.

This advanced compound fertilizer line integrates a heavy-duty rotary drum classifier with our high-pressure dry extrusion machinery. By systematically grading output particles through a continuous, automated sifting matrix, this high-performance fertilizer screening machine separates graded fertilizer granules from fine dust with absolute precision, delivering a flawless, high-selling commercial appearance that meets strict international retail standards.

• Advanced Multi-Stage Drum Grading: The integrated rotary drum classifier features interchangeable dual-layer screens, allowing factory operators to isolate perfect 2-4mm commercial particles with extreme precision.
• Exceptional Finished Product Yield: Combined with our low-friction mechanical crushing framework, the line maximizes the percentage of premium graded fertilizer granules while minimizing broken dust.
• Automated Material Reclamation: Off-size particles and fine powder are instantly separated and swept into a closed return conveyor loop for immediate re-granulation, achieving a 100% material utilization rate.
• Low-Maintenance Anti-Clogging Mesh: The heavy-duty fertilizer screening machine is equipped with mechanical rubber beaters or internal nylon brushes that automatically clean the screen holes during rotation, preventing sticky material blind spots.

This advanced fertilizer screening machine line relies on a continuous, closed-loop mechanical separation sequence to deliver perfect finished products:

1. Gravimetric Formula Material Loading: Raw chemical crystal elements and inorganic filler powders are automatically weighed and loaded via dynamic conveyor belts into the centralized processing stream.
2. Rapid Continuous Powder Blending: The bulk dry ingredients drop into a large dual-shaft ribbon blender, which uses aggressive mechanical agitation to create a completely uniform powder mix prior to compaction.
3. Forced Pre-Density Vertical Feeding: The blended powder drops into a vertical feed screw throat, which pre-compresses and degasses loose material, pushing it steadily into the high-pressure roller nip zone.
4. Ambient-Temperature Dry Rolling: The powder passes between two high-precision counter-rotating alloy rollers. Under immense hydraulic squeezing forces, the loose dry mix is instantly flattened into hard, stone-hard solid sheets.
5. Dynamic Mechanical Flake Crushing: The solid compressed sheets drop directly into an enclosed under-roller breaking mill, where rotating slow-speed cutting bars crack the flakes into raw multi-angled fragments.
6. High-Capacity Rotary Drum Classification: The fragments drop straight into the core rotary drum classifier. As the drum rotates at a scientifically calibrated angle, the material rolls over the inner screen meshes. Fine dust drops through the first layer, while oversized chunks travel to the end of the drum.
7. Closed-Loop Waste-Free Recirculation: Oversized fragments are automatically routed to a secondary sizing mill for a quick re-crush, while fine undersized dust is gathered by a bottom collector and re-routed via an enclosed elevator back into the primary vertical screw for instant re-compaction.
8. Direct Bulk Packaging of Graded Particles: The perfectly sized, qualified graded fertilizer granules flow out of the central sifter chute and move directly into an automated packaging station for rapid, dustless 25kg/50kg commercial bagging.