Dry Type Roller Press NPK Fertilizer Production Line with 10000-15000t/year Annual Output

High-hygroscopicity fertilizer chemical salts frequently suffer from particle degradation, agglomeration, and severe caking when stored or shipped through humid tropical climates. Our cutting-edge Anti-Caking Coated Compound Fertilizer Production Line is engineered specifically to eliminate these storage and logistical risks.

This advanced compound fertilizer line integrates a heavy-duty rotary coating drum with our premium room-temperature dry extrusion machinery. By applying a micro-thin, uniform layer of protective agents or oils onto the granule surfaces, this specialized anti-caking fertilizer machine delivers highly polished, free-flowing commercial products that resist moisture absorption, guaranteeing an extended shelf-life during long-distance maritime transport.

• Advanced Surface Modification Coating: The integrated rotary coating drum features adjustable mist-spraying nozzles that encapsulate each particle with an ultra-thin anti-caking oil or powder layer.
• Enhanced Commercial Aesthetics: The continuous rolling friction inside the coating matrix smooths out rough edges, significantly improving the roundness, brightness, and commercial appearance of the granules.
• Fluidless Dry Agglomeration Matrix: Bypasses the need for water-based liquid binders or high-heat steam during the pressing stage, ensuring raw chemical formulas maintain their pristine concentration.
• Heavy-Duty Structural Longevity: Built for continuous mass-volume industrial output, all core compression drives feature enclosed heavy gearboxes and automatic bearing lubrication systems to minimize routine plant downtime.

• Production Capacity: 2 - 10 Tons/Hour (Configured for high-volume commercial fertilizer coating)
• Surface Coating Hardware: Heavy-duty Rotary Coating Drum with automated oil-injection and powder-dosing modules
• Core Agglomeration Method: Double-Roller Dry Extrusion Press Compaction
• Final Output Target: 2.5mm - 6mm uniform, anti-caking coated compound fertilizer granules
• Primary System Architecture: Centralized automated PLC control console with independent fluid-pressure digital readouts

This advanced coated fertilizer production system relies on a continuous, closed-loop mechanical sequence to manufacture climate-resilient granules:

1. Sealed Gravimetric Material Intake: Bulk chemical powders and raw mineral elements are discharged from independent automated silos onto enclosed belt scales for highly accurate formula tracking.
2. Homogeneous Multi-Component Blending: The dry raw ingredients enter an industrial continuous ribbon blender, which uses aggressive mechanical agitation to create a completely uniform mix within minutes.
3. Forced De-Aeration Vertical Feeding: The blended powder drops into a vertical feed screw throat, which pre-compares and degasses loose material, pushing it steadily into the high-pressure roller nip zone.
4. Room-Temperature Dry Pressing: The de-aerated powder passes between two high-precision counter-rotating alloy rollers. Under immense hydraulic squeezing forces, the loose dry mix is instantly flattened into stone-hard solid sheets.
5. Mechanical Granule Flake Breaking: The solid compressed sheets drop directly into an enclosed primary crushing mill, where rotating slow-speed cutting bars crack the flakes into raw multi-angled fragments.
6. High-Frequency Precision Sorting: The broken fragments travel through an enclosed rotary screening machine to extract standard commercial granules (2-4mm). All off-size dust and oversized pieces are automatically returned via an enclosed elevator back into the primary hopper for 100% waste-free recycling.
7. Automated Multi-Layer Rotary Coating: The qualified graded granules flow straight into the rotary coating drum. As the drum rotates at a scientifically calibrated angle, the particles are sprayed with a specialized anti-caking compound oil, followed by a light dusting of protective conditioning powder to seal the granule surfaces.
8. Automated Quantitative Bulk Packing: The final moisture-proof, coated compound fertilizer granules move directly to an automated packaging station, where they are weighed and sealed into 25kg/50kg commercial woven bags, completely ready for global distribution.