---
title: "Rotary Granulation Drum"
industry: "Chemical Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:ROTARY_GRANULATION_DRUM"
  data_integrity_hash: "4f356c852b5f4541e8574ba09fd8599b"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:ROTARY_GRANULATION_DRUM"
  data_source_uri: "https://cnfx.com/llms/industry/chemical-manufacturing/product/rotary-granulation-drum.md"
  official_resource_url: "https://cnfx.com/industry/chemical-manufacturing/product/rotary-granulation-drum"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 rpm rotational speed, 80-120°C internal temperature, 0.1-0.3 MPa internal pressure"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 4.0
    unit: "rpm"
    consequence: "Centrifugal force exceeding particle cohesive strength (σ_c &lt; 0.5 MPa) causes mechanical degradation; Arrhenius kinetics (k = A·e^(-Ea/RT)) with Ea = 80 kJ/mol for urea decomposition above 140°C"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Bearing lubrication failure with oil film thickness &lt; 1 μm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hydrodynamic bearing design with minimum 10 μm oil film at 3 rpm, monitored by eddy-current proximity sensors"
  - node_2:
      trigger: "Cooling water flow reduction below 50 m³/h causing heat transfer coefficient &lt; 500 W/m²·K"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Redundant cooling loops with ΔP &gt; 0.2 MPa, controlled by PID maintaining 95±2°C shell temperature"
bom_nodes:
  drum-shell:
    type: "component"
    urn: "URN:CNFX:ME:DRUM_SHELL"
    interface_type: "physical-logic-coupled"
  internal-lifters-fights:
    type: "component"
    urn: "URN:CNFX:ME:INTERNAL_LIFTERS_FIGHTS"
    interface_type: "physical-logic-coupled"
  spray-system-nozzles-manifold:
    type: "part"
    urn: "URN:CNFX:ME:SPRAY_SYSTEM_NOZZLES_MANIFOLD"
    interface_type: "physical-logic-coupled"
  abrasion-resistant-lining:
    type: "component"
    urn: "URN:CNFX:ME:ABRASION_RESISTANT_LINING"
    interface_type: "physical-logic-coupled"
  drive-assembly-gear-motor:
    type: "part"
    urn: "URN:CNFX:ME:DRIVE_ASSEMBLY_GEAR_MOTOR"
    interface_type: "physical-logic-coupled"
  support-rollers-trunnions:
    type: "component"
    urn: "URN:CNFX:ME:SUPPORT_ROLLERS_TRUNNIONS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - MACHINERY DIRECTIVE 2006/42/EC"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/chemical-manufacturing/product/rotary-granulation-drum.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "596283edc14cd89a352c76ead7eeb22d0d72540241dbc1fbaf2f3c8293a7fd3d"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Rotary Granulation Drum

## 1. Technical Definition
A rotating cylindrical vessel where urea melt is sprayed onto seed particles and solidified into granules through cooling and tumbling action.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 rpm rotational speed, 80-120°C internal temperature, 0.1-0.3 MPa internal pressure**. Failure boundary: **Exceeding 4.0 rpm causes centrifugal force &gt; 0.5g, leading to particle attrition &gt; 15% by mass; temperature &gt; 140°C initiates urea decomposition with NH₃ release &gt; 100 ppm**, Mechanism: **Centrifugal force exceeding particle cohesive strength (σ_c &lt; 0.5 MPa) causes mechanical degradation; Arrhenius kinetics (k = A·e^(-Ea/RT)) with Ea = 80 kJ/mol for urea decomposition above 140°C**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Bearing lubrication failure with oil film thickness &lt; 1 μm | 8 | Rotational eccentricity &gt; 5 mm causing unbalanced load &gt; 15 kN | Hydrodynamic bearing design with minimum 10 μm oil film at 3 rpm, monitored by eddy-current proximity sensors |
| Cooling water flow reduction below 50 m³/h causing heat transfer coefficient &lt; 500 W/m²·K | 8 | Urea melt solidification time &gt; 120 s leading to agglomeration &gt; 20 mm diameter | Redundant cooling loops with ΔP &gt; 0.2 MPa, controlled by PID maintaining 95±2°C shell temperature |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Spray System (Nozzles &amp; Manifold)](https://cnfx.com/llms/industry/chemical-manufacturing/product/spray-system-nozzles-manifold.md) `(Standalone System)`
- [Drive Assembly (Gear &amp; Motor)](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drive-assembly-gear-motor.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Urea Melt Feed System**, **Granule Cooling System**, **Dust Collection System**  
**Downstream Applications**: Urea Fertilizer Granules, Compound Fertilizer Granules, Slow-Release Fertilizer Granules  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are used in the construction of this rotary granulation drum?
**A**: The drum features a carbon steel shell for structural integrity, stainless steel internal lifters and spray system for corrosion resistance, and an abrasion-resistant lining to withstand continuous tumbling action during urea granulation.

### Q: How does the rotary granulation drum process urea melt into granules?
**A**: Urea melt is sprayed through stainless steel nozzles onto seed particles inside the rotating drum. As the drum rotates, internal lifters tumble the material while cooling air solidifies the melt into uniform granules through controlled solidification and attrition.

### Q: What maintenance considerations are important for this equipment?
**A**: Regular inspection of the abrasion-resistant lining and internal lifters is crucial due to continuous abrasive action. The spray system nozzles require periodic cleaning to prevent clogging, and support rollers/trunnions need lubrication and alignment checks to ensure smooth rotation.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- CE MARKING - MACHINERY DIRECTIVE 2006/42/EC

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Rotary Granulation Drum](https://cnfx.com/industry/chemical-manufacturing/product/rotary-granulation-drum)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **6** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: ROTARY_GRANULATION_DRUM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 6821bc1b
