Heavy-Duty Rotary Drum Granulator: 2.0m x 8.0m for 15-18 TPH NPK Fertilizer Lines

In commercial NPK compound fertilizer manufacturing, achieving high hourly throughput requires precise drum mechanics, optimized residence time, and heavy-duty mechanical transmission. A continuous rotary drum granulator measuring 2.0 meters in diameter and 8.0 meters in length represents an industry-standard benchmark for high-capacity fertilizer plants.

Engineered to handle dense chemical slurry, steam, and dry powder formulations, this 2.0m x 8.0m NPK fertilizer granulator delivers a continuous production capacity of 15 to 18 tons per hour (TPH). Its long-bed tumbling mechanism ensures high liquid-to-solid reaction efficiency, superior granule sphericity, and high crushing strength.

Technical Parameter Matrix (2.0m x 8.0m Granulator Model)

Structural Innovations for 15-18 TPH NPK Fertilizer Processing

Processing 15-18 TPH of NPK compound fertilizer subjects the granulation drum to extreme mechanical loads and chemical corrosion. This heavy-duty model incorporates four key engineering upgrades:

1. 1:4 Golden Diameter-to-Length Ratio (2.0m x 8.0m)

The 8.0-meter extended drum length increases material residence time inside the tumbling zone. This prolonged rolling action gives steam-injected NPK melt or liquid urea mists sufficient time to bind dry potassium and phosphate powders into dense, highly spherical 2–4.5 mm granules before discharging.

2. Anti-Stick & Corrosion-Proof Internal Lining

NPK formulations contain highly viscous, hygroscopic chemical salts (ammonium nitrate, urea, MAP/DAP) that stick to hot steel. The internal cylinder is fitted with flexible UHMW-PE or high-grade rubber liners. As the drum rotates, the flexible liner flexes slightly, knocking off sticky buildup automatically without mechanical scrapers.

3. Forged Steel Riding Rings & Heavy-Duty Support Rollers

To support an operating load exceeding 30–40 tons (including material mass), the drum is mounted on solid forged steel riding rings (tyres) and heavy-duty cast steel support roller assemblies with spherical roller bearings, absorbing thermal expansion and heavy vibration.

4. Integrated Steam & Liquid Distribution Pipe System

Equipped with internal stainless steel (SUS316L) spray manifolds, allowing operators to inject high-pressure steam, liquid urea, or phosphoric acid directly into the deepest part of the rolling bed. This raises bed temperatures to 65°C–80°C, maximizing liquid-phase granulation and lowering downstream drying energy costs.

Production Line Synergy: 15-18 TPH NPK System Layout

To achieve a true 15–18 TPH finished product output, the 2.0m x 8.0m rotary drum granulator integrates smoothly into a continuous automated fertilizer line:

[Dynamic NPK Batching System] ➔ Cage Crusher / Twin-Shaft Mixer 

                                        ↓

               2.0m x 8.0m Rotary Drum Granulator (Steam/Liquid Injected)

                                        ↓

              Rotary Dryer (2.4m x 20m) ➔ Rotary Cooler (2.2m x 18m)

                                        ↓

               Rotary Sizing Screen ➔ Coating Drum ➔ Automatic Packing

Frequently Asked Questions

Q: What is the power requirement for a 2.0m x 8.0m rotary drum granulator?

A: This drum size typically utilizes a 45 kW to 55 kW main electric motor paired with a heavy-duty speed reducer and big ring-gear drive to ensure stable torque under full 15–18 TPH load conditions.

Q: Can this granulator handle high-nitrogen NPK formulations?

A: Yes. By utilizing internal steam injection pipes and anti-stick rubber liners, this 2.0m x 8.0m drum processes high-nitrogen NPK grades (e.g., NPK 30-10-10 or 20-10-10) without internal hopper blockage or liquid pooling.

Upgrade Your NPK Plant with Heavy-Duty Gofine Granulation Drums

Installing a heavy-duty 2.0m x 8.0m rotary drum granulator ensures high hourly output, low material recycling rates, and long service life under aggressive chemical operating conditions.

Contact the Gofine heavy machinery department today for custom CAD equipment drawings, motor/gearbox specifications, and direct factory pricing for our 15-18 TPH NPK granulator series!