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Rotary Drum Granulator

Rotary Drum Granulator
Rotary Drum Granulator
Rotary Drum Granulator
Rotary Drum Granulator
Rotary Drum Granulator

Drum granulator is a granulation equipment widely used in pharmaceutical, chemical, food, agriculture and other fields. The following is a detailed explanation about the conversion granulator:

Product Name: Rotary Drum Granulator

Production capacity: 1-20t/h

Power: 5.5-20kw

Ball formation rate: 90%

Particle diameter: 1-10mm

Granulation form: drum granulation

Customized processing: Yes

Warranty period: 12 months

Table of Contents

Definition of Wet granulator

A rotary drum granulator is a device that converts powdered materials into granular materials through mechanical force. In the field of agriculture, it is mainly used for the production of compound fertilizers, organic fertilizers, biological fertilizers, controlled-release fertilizers and other fertilizers, and is an indispensable key equipment on the fertilizer production line.

As a core piece of equipment in fertilizer production, the drum granulator has become a key technological tool for the large-scale industrial production of compound fertilizers, organic fertilizers, and inorganic fertilizers thanks to its high efficiency, stability, and adaptability. This equipment uses a combination of physical rotation and chemical bonding to convert powdered materials into uniform granules, thereby improving the physical properties of fertilizers and promoting the process of recycling agricultural waste.

Working principle of fertilizer granulator

The granulation machine uses a wet granulation process, the core of which is to form particles through the agglomeration of materials under liquid conditions. When the equipment is running, the main motor drives the reducer, which in turn drives the inclined drum to rotate through gear transmission. After the material enters from the feed end, it undergoes four stages of wetting, mixing, rolling, and compaction under the action of the special structure on the inner wall of the drum:

  • Wetting stage: The spray system uniformly sprays water or a binder (such as molasses or bentonite) to increase the moisture content of the material to 30%-50%, forming liquid bridges;
  • Mixing stage: The centrifugal force generated by the rotating drum, combined with gravity, causes the material to tumble inside the cylinder, achieving uniform mixing;
  • Rolling Granulation: Powdered material gradually binds into small particles through collision and compression under moist conditions, then continues to grow and compact during ongoing rolling;
  • Drying and Curing: Some equipment is equipped with a hot air system, which simultaneously evaporates moisture during granulation to enhance particle strength (up to 25N or higher).

Equipment Structure and Performance Advantages

Drum cylinder:

  • Welded from medium-carbon steel plates, lined with acid-resistant stainless steel or rubber plates, enabling automatic scar and tumor removal, eliminating traditional scraper devices, and reducing maintenance costs.
  • Adjustable tilt angle (2°-10°), controlling material retention time through gravity sorting to adapt to different formula requirements.

Transmission system:

  • Three-stage transmission consisting of motor, reducer, and gearbox, ensuring low-speed stable rotation of the drum (5-20 rpm);
  • The support wheel frame is made using casting technology, with high-quality corrosion-resistant and wear-resistant materials to extend service life. Lifting hooks are provided at the four corners of the support frame for easy transportation.

Spray and hot air system:

  • The spray device precisely controls the amount of liquid added to prevent excessive moisture and clumping.
  • The hot air system can be integrated into the drum to achieve integrated granulation and drying, reducing energy consumption by more than 30%.

Performance indicators:

  • Pelletization rate: 70%-90% (up to 95% for the stirrer-drum combination type);
  • Particle diameter: Adjustable from 2-8 mm, with a strength of ≥25 N;
  • Production capacity: Single unit hourly output of 3-33 tons, supporting continuous production;
  • Energy consumption: 40% lower than roller extrusion pelletizers and 20% more efficient than disc pelletizers.

Characteristics of fertilizer granulation process

  • Wide applicability: Suitable for large-scale production of cold and hot granulation as well as high, medium, and low concentration compound fertilizers.
  • High production efficiency: Due to the continuous entry of materials and the continuous rotation of the granulator, large-scale production can be achieved.
  • Reasonable design: The machine barrel is lined with special rubber plates or acid resistant stainless steel plates, which realizes automatic scar removal and tumor removal, eliminates the traditional scraper device, and extends the service life of the equipment.
  • Flexible process: It can complete the granulation process of compound fertilizer with chemical reactions and heating inside the cylinder, or the cold granulation process of compound fertilizer with a small amount of water supplementation.

Organic fertilizer granulator

  • Machines of different models and specifications have different production capacities and applicable ranges, resulting in varying prices.
  • High quality materials and advanced manufacturing processes will increase manufacturing costs, thereby affecting selling prices.
  • Additional features and configurations, such as automated control systems, will increase the price of the equipment.
  • Well known brands and comprehensive after-sales service usually lead to higher prices.
  • The market supply and demand relationship is also an important factor in determining prices, and prices may rise when demand exceeds supply.

Parameter table of rotary drum granulator

modelCylinder diameter (mm)Cylinder length (mm)Speed (r/min)Power (kw)Output (t/h)
ZG-124012004000175.51-3
ZG-145014005000147.53-5
ZG-16601600600011.5115-8
ZG-18701800700011.51580-10
ZG-2080200080001118.58-15
ZG-22802200800010.52215-20
Note: All product parameters are not limited to the content of the above table and are customized to meet different customer needs.

Organic fertilizer granules makingmachine

  • Compound fertilizer industry: It is one of the key equipment for the production of compound fertilizers, suitable for large-scale production of cold and hot granulation as well as high, medium, and low concentration compound fertilizers.
  • Pharmaceutical industry: used for manufacturing tablets, granules, traditional Chinese medicine pills, etc.
  • Chemical industry: used for the production of fertilizers, recycled plastic pellets, dyes, etc.
  • Metallurgical industry: used for producing metal powders, manganese ore sintered bricks, etc.
  • Food industry: used for producing concentrated juices, sweeteners, solid seasonings, etc.
  • Agricultural industry: used for manufacturing feed, organic fertilizers, etc.
Using materials

What Are the Biggest Advantages for My Business?

The biggest advantages are its massive production capacity, the high strength and quality of the granules it produces, and its ability to handle a wide range of raw materials. These benefits directly translate to higher profits and a more reliable operation.

When you invest in a major piece of equipment like a granulator, you need to know it will provide a clear return. The Rotary Drum Granulator from Fude Machinery is designed to boost your bottom line in several key ways.

  • Extremely High Production Capacity

This is the number one reason large plants choose this machine. Our models are built for industrial-scale output, with some capable of producing up to 30 tons of fertilizer per hour. If your business depends on producing and selling large volumes, no other machine can match this level of productivity. It allows you to meet large orders and scale your business efficiently.

  • Superior Granule Strength

The wet granulation method used in the drum creates very dense and hard granules. This is a huge commercial advantage. Strong granules do not break down into dust during bagging, shipping, or application in the field. This means you lose less product to waste, and your customers receive a clean, high-quality product that performs well in mechanical spreaders.

  • Wide Adaptability of Raw Materials

While this machine excels at making NPK compound fertilizers, its robust design allows it to handle a variety of raw materials. It can process materials that might be difficult for other granulator types. This flexibility means you can adapt your product formulas to meet changing market demands or take advantage of different raw material sources without needing to buy a new machine.

What are the types of organic fertilizer granulators available

Organic fertilizer granulator is a specialized equipment used to granulate various organic compounds after fermentation. It has a variety of types, including double roll granulator, disc granulator, toothed granulator, drum granulator, compound fertilizer granulator, and round granulator, each with its own characteristics, suitable for different production needs and scenarios.

Round pelletizer
Stirring toothed granulator
Compound fertilizer granulato
Disc Pelletizer
Organic fertilizer granulator

Organic fertilizer production line process

The organic fertilizer production line is a production system that integrates the steps of raw material collection, pretreatment, fermentation, granulation, drying, screening, packaging, etc. It can convert organic waste such as aquaculture waste, crop straw, and food processing waste into organic fertilizers rich in nutrients for agricultural production.

Frequently Asked Questions (FAQ)

  • Question 1: What is the average power consumption of this machine?
  • Power consumption varies with size. A small 1-3 t/h drum granulator might use a 15 kW motor, while a large 15-20 t/h model could require a motor of 75 kW or more. We design our machines for high efficiency, but due to its size and power, it is a significant energy consumer in any plant.
  • Question 2: What kind of maintenance is required?
  • Maintenance is straightforward but crucial for long life. The main tasks include regularly checking the drive chain or gear system, lubricating the large support bearings, and inspecting the inner lining of the drum for wear. Because we build our drums with thick, high-quality steel, they are designed to last for many years with proper care.
  • Question 3: Can I control the size of the granules?
  • Yes, but the control is less direct than with a disc granulator. Granule size is controlled by adjusting several factors: the amount of moisture and steam added, the speed of the drum’s rotation, and the angle of inclination. It often works best with a downstream screening system to separate out the perfectly sized granules.
  • Question 4: Do I need a professional team to install it?
  • Due to its large size and heavy weight, professional installation is highly recommended. As part of our full-service support, Fude Machinery can provide detailed installation drawings, and technical guidance, or even send our engineers to your site to supervise the installation and commissioning of your complete fertilizer production line .

For any business focused on high-volume production of NPK or compound fertilizers, the Rotary Drum Granulator is not just an option—it is a necessity. It is the industrial-strength solution that delivers unmatched capacity, produces exceptionally strong granules, and offers the reliability you need for continuous operation. While it represents a significant investment, the returns in terms of production volume, product quality, and operational efficiency are clear and substantial. This machine is the powerful engine at the heart of the world’s most successful fertilizer plants, turning raw materials into profit on a massive scale.

Introduction to Fude Machinery Company

  • The production equipment includes: fermentation raking machine, dryer, granulator, crusher, mixer, round throwing machine, organic fertilizer production line, etc. The company will continue to adhere to the business philosophy of “quality first, customer first” and provide higher quality metal equipment solutions for global customers.
  • Since its establishment in 2015, Fude Machinery has been committed to providing high-quality and high-performance metal equipment solutions to global customers. With advanced production technology, strict quality control, and continuous innovative research and development capabilities, we have received customer satisfaction praise.
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