Industry-Verified Manufacturing Data (2026)

Rotary Drum Granulator for Compound Fertilizers

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Rotary Drum Granulator for Compound Fertilizers used in the Fertilizers and Nitrogen Compounds Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Rotary Drum Granulator for Compound Fertilizers is characterized by the integration of Rotating Drum Shell and Main Drive System. In industrial production environments, manufacturers listed on CNFX commonly emphasize Carbon Steel (Drum Shell) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Industrial machine for producing uniform fertilizer granules via rotary drum agglomeration.

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Product Specifications

Technical details and manufacturing context for Rotary Drum Granulator for Compound Fertilizers

Definition
A rotary drum granulator is a core industrial machine in fertilizer manufacturing plants that transforms powdered raw materials into uniform, spherical granules through a continuous tumbling and agglomeration process. It plays a critical role in the production of compound fertilizers (NPK) by ensuring consistent particle size, improved nutrient homogeneity, and enhanced physical properties like crush strength and flowability. This equipment is essential for B2B supply chains as it directly impacts product quality, handling efficiency, and marketability for bulk fertilizer producers, enabling them to meet specific agricultural grade specifications and packaging requirements.
Working Principle
Powdered fertilizer materials are fed into a rotating inclined drum; as the drum rotates, the material tumbles and coalesces into granules, often aided by a liquid binder spray; granules grow in size through layering and are discharged at the opposite end.
Common Materials
Carbon Steel (Drum Shell), Stainless Steel (Internal Liners/Spray System), Wear-Resistant Alloy (Lifter Plates)
Technical Parameters
  • Internal diameter of the rotating drum, determining capacity and granule trajectory. (meters) Per Request
  • Maximum throughput of finished granular fertilizer under standard operating conditions. (tons/hour) Per Request
Components / BOM
  • Rotating Drum Shell
    Main cylindrical vessel where granulation occurs.
    Material: Carbon steel with protective lining
  • Main Drive System
    Provides rotational torque to the drum via motor, reducer, and girth gear.
    Material: Steel, alloy gears
  • Support Rollers and Thrust Rollers
    Support the drum's weight and control axial movement.
    Material: Forged steel with hardened surfaces
  • Internal Lifter Plates
    Lift and cascade material to promote tumbling and granule formation.
    Material: Wear-resistant steel or alloy
  • Liquid Binder Spray System Optional
    Distributes liquid binder (e.g., water, solution) uniformly into the powder bed.
    Material: Stainless steel nozzles and piping
Engineering Reasoning
0.5-3.0 rpm drum rotation, 60-120°C process temperature, 15-25% moisture content in feed material
Drum rotation exceeding 3.5 rpm causes centrifugal force > 0.4g, leading to particle ejection; temperature > 130°C initiates ammonium nitrate decomposition at 210°C onset temperature
Design Rationale: Excessive centrifugal force at high rotation rates overcomes cohesive forces between particles (van der Waals forces < 0.1 eV); thermal decomposition follows Arrhenius kinetics with activation energy of 80-100 kJ/mol for ammonium nitrate
Risk Mitigation (FMEA)
Trigger Bearing lubrication failure due to contamination ingress exceeding ISO 4406 18/16/13 cleanliness level
Mode: Increased friction coefficient from 0.0015 to >0.005 causes bearing temperature rise > 70°C above ambient
Strategy: Sealed-for-life bearings with IP66 rating and automated grease injection at 1000-hour intervals
Trigger Material buildup exceeding 15mm thickness on internal lifters due to improper binder ratio
Mode: Dynamic imbalance force > 500 N at operating speed, exceeding ISO 1940 G6.3 balance grade
Strategy: Automated scraper system with 316L stainless steel blades activated when torque exceeds 120% of nominal value

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Rotary Drum Granulator for Compound Fertilizers.

Fertilizer Drum Granulator Rotary Granulation Drum NPK Granulation Machine rotary drum granulator for compound fertilizers industrial fertilizer granulation machine compound fertilizer production equipment rotary drum agglomeration system fertilizer granulator with stainless steel spray

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric (non-pressurized operation)
flow rate: 5-50 tons/hour (capacity varies with drum size and design)
temperature: Ambient to 80°C (process-dependent, typically 40-60°C for optimal granulation)
drum inclination: 1-5 degrees (adjustable for residence time control)
rotational speed: 10-25 RPM (varies with drum diameter)
slurry concentration: 40-70% solids by weight (optimal 50-60% for proper granule formation)
Media Compatibility
✓ NPK compound fertilizer slurries ✓ Ammonium phosphate-based formulations ✓ Potassium-rich fertilizer blends
Unsuitable: Highly corrosive acidic or chloride-containing environments (accelerated equipment degradation)
Sizing Data Required
  • Required production capacity (tons/hour)
  • Feed slurry characteristics (viscosity, density, particle size distribution)
  • Desired granule size range and moisture content

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Bearing seizure due to contamination
Cause: Fertilizer dust and moisture ingress into bearing housings, leading to corrosion and lubricant degradation, ultimately causing overheating and seizure.
Drum shell perforation from abrasive wear
Cause: Continuous abrasion from raw materials (e.g., phosphate rock, ammonium sulfate) and granule tumbling, exacerbated by material buildup and improper drum speed or loading.
Maintenance Indicators
  • Excessive vibration or irregular drum rotation, indicating imbalance, bearing issues, or material buildup.
  • Unusual grinding or scraping noises from the drum interior, suggesting liner wear, loose components, or foreign object intrusion.
Engineering Tips
  • Implement a strict sealing and purge system for bearings, using labyrinth seals and positive air pressure to prevent dust and moisture ingress, coupled with scheduled lubricant analysis.
  • Optimize drum speed and feed rate to minimize abrasive impact, and apply wear-resistant liners (e.g., polyurethane or ceramic) with regular thickness monitoring and timely replacement.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems CE Marking (Machinery Directive 2006/42/EC) ASTM A240/A240M - Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
Manufacturing Precision
  • Drum Cylindricity: +/- 0.5 mm per meter length
  • Shaft Alignment: +/- 0.05 mm radial runout
Quality Inspection
  • Non-Destructive Testing (NDT) - Ultrasonic Testing for weld integrity
  • Material Composition Verification via X-Ray Fluorescence (XRF) Analysis

Factories Producing Rotary Drum Granulator for Compound Fertilizers

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

S Sourcing Manager from Australia Jan 16, 2026
★★★★★
"Standard OEM quality for Fertilizers and Nitrogen Compounds Manufacturing applications. The Rotary Drum Granulator for Compound Fertilizers arrived with full certification."
Technical Specifications Verified
P Procurement Specialist from Singapore Jan 13, 2026
★★★★☆
"Great transparency on the Rotary Drum Granulator for Compound Fertilizers components. Essential for our Fertilizers and Nitrogen Compounds Manufacturing supply chain. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Germany Jan 10, 2026
★★★★★
"The Rotary Drum Granulator for Compound Fertilizers we sourced perfectly fits our Fertilizers and Nitrogen Compounds Manufacturing production line requirements."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

9 sourcing managers are analyzing this specification now. Last inquiry for Rotary Drum Granulator for Compound Fertilizers from India (1h ago).

Frequently Asked Questions

What materials are used in the construction of this rotary drum granulator?

The drum shell is made of carbon steel, internal liners and spray system use stainless steel for corrosion resistance, and lifter plates are constructed from wear-resistant alloy for durability.

What is the production capacity range for this granulator?

Production capacity varies based on drum dimensions and configuration, typically ranging from several tons to over 100 tons per hour depending on specific model specifications.

How does the rotary drum granulation process work for compound fertilizers?

The process involves tumbling raw materials in a rotating drum while spraying liquid binder, forming uniform granules through agglomeration as materials adhere and grow in size.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Fertilizers and Nitrogen Compounds Manufacturing sector.

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