table of contents I. Key Features, Advantages & Selection FactorsII. Production Capacity & Operating EfficiencyIII. Working Principle of the Disc GranulatorIV. Primary Application Areas In modern organic fertilizer production lines and compound fertilizer production lines, granulation is a critical phase that determines granule roundness, mechanical strength, and commercial market value. A disc granulator (also known […]

In modern organic fertilizer production lines and compound fertilizer production lines, granulation is a critical phase that determines granule roundness, mechanical strength, and commercial market value. A disc granulator (also known as a pan granulator) is a wet-type tumbling granulation apparatus engineered to process powdered materials into highly uniform, rounded pellets.

As a leading organic fertilizer equipment manufacturer and fertilizer equipment manufacturer, Taian Hongxin Environmental Protection Equipment Co., Ltd. offers high-performance organic fertilizer granulators and fertilizer granulating equipment integrated within complete fertilizer processing machinery solutions.

I. Key Features, Advantages & Selection Factors

1. Core Advantages

• High Balling Rate & Uniform Granules: Achieves a high balling efficiency of 85% to 95%, yielding smooth, spherical granules with low return rates.

• Flexible Control & Easy Operation: Particle diameter can be controlled effortlessly by adjusting pan inclination angle, rotational speed, liquid spray rate, and feeding speed.

• Simple Structure & Low Failure Rate: Robust mechanical layout with minimal wearing components, ensuring low maintenance overhead.

• Continuous 24/7 Production: Supports round-the-clock continuous feeding, granulating, and discharging—perfect for small-to-medium fertilizer production lines.

• Wide Material Adaptability: Capable of granulating chicken manure, cow dung, sheep manure, humic acid, sludge, and NPK compound fertilizer powders.

• Cost-Effective Investment: Lower equipment procurement cost and power consumption compared to roller extrusion and rotary drum granulators.

• Low-Dust Wet Process: Spray humidification effectively suppresses dust generation, maintaining a clean workshop environment.

2. Limitations to Consider

• Requires Moisture Addition: Dry powders cannot form granules directly; water or liquid binders must be continuously introduced.

• Moderate Initial Hardness: Granules require downstream drying and solidification using rotary dryers within the fertilizer production equipment chain.

• Sensitivity to High Moisture/Viscosity: Raw materials with excessive humidity may stick to the pan surface, requiring proper pre-treatment.

II. Production Capacity & Operating Efficiency

1. Capacity Guide for Organic Fertilizer Production

• Small Model (Disc Diameter 2.5m): Approx. 0.8 – 1.5 tons/hour

• Medium Model (Disc Diameter 3.0m): Approx. 1.5 – 3.0 tons/hour

• Large Model (Disc Diameter 3.2 – 3.5m): Approx. 3.5 – 6.0 tons/hour

2. Efficiency Highlights

• Low Power Consumption: Consumes significantly less power per ton compared to extrusion or drum granulators.

• Quick Parameter Switching: Easily switch granule size specifications by modifying disk tilt or speed, optimizing overall line productivity.

III. Working Principle of the Disc Granulator

The disc granulator operates on a wet-tumbling agglomeration principle. Using centrifugal force, gravity, and surface friction created by an inclined rotating disc, atomized liquid sprays bind fine powders into tumbling nuclei that grow layer by layer into dense spherical balls:

1. Uniform Material Feeding: Powdered raw materials are continuously fed onto the inclined rotating pan.

2. Atomized Humidification & Nucleation: Mist nozzles spray clean water or binder solution onto the moving powder, causing fine particles to adhere to one another and form micro-nuclei.

3. Layer-by-Layer Coating: As the disc rotates, these nuclei roll across the bed, gathering additional dry powder and compacting into larger spherical pellets (similar to rolling a snowball).

4. Automatic Overflow Discharge: Once granules reach the targeted size (controlled by tilt angle and disc speed), they automatically spill over the disc rim due to gravity and mass differential, enabling seamless continuous production.

IV. Primary Application Areas

• Organic & Bio-Organic Fertilizer Plants: Ideal bio-organic fertilizer equipment for processing poultry manure, livestock dung, humic acid, sludge, and agricultural residues.

• NPK & Compound Fertilizer Manufacturing: Efficient granulation of nitrogen, phosphorus, potassium, and micronutrient powders in NPK compound fertilizer production lines.

• Chemicals & Minerals: Processing inorganic salts, chemical additives, fine ore powders, and iron dust into spherical pellets.

• Environmental Solid Waste Recovery: Granulating industrial solid wastes such as fly ash, lime powder, and desulfurization ash for recycling.