Compound Fertilizer Granulator

Title: Compound Fertilizer Granulator

Usage: The compound fertilizer granulator is the core equipment used to process powdered raw materials such as nitrogen, phosphorus, and potassium into uniform granules.

Production Capacity: 0.3 – 20 t/h

Raw Materials: Nitrogen, phosphorus, and potassium(NPK) materials; urea; potassium chloride powder, etc.

Pellet Shape: Spherical, oblate spherical.

Pellet Size: 1 – 10 mm

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Product Description

The compound fertilizer granulator is the core equipment in compound fertilizer production. Its primary function is to process powdered compound fertilizer raw materials into granules that are uniform in size, meet strength standards, and are easy to store and apply, thereby addressing the common issues of powdered fertilizers—such as caking, dust generation, and uneven application. Using a compound fertilizer granulator not only significantly improves production efficiency and reduces labor costs but also ensures uniform granule formation and consistent quality, helping farmers enhance fertilization effectiveness and reduce nutrient loss. Furthermore, granulating the fertilizer improves its physical properties, reduces moisture absorption and caking during transportation and storage, facilitates mechanized application, and simplifies the fertilization process. It also slows the rate of nutrient leaching, protects seeds and seedlings, and minimizes nutrient waste.
With over 20 years of experience in manufacturing fertilizer making equipment and backed by a dedicated R&D team, we have deep industry expertise and can optimize equipment performance to meet diverse production needs. Our after-sales team responds promptly and provides attentive service, offering free installation and professional technical guidance throughout the process. We support customized production and can provide tailored solutions for both small workshops and large-scale production lines. Customers with specific needs are welcome to contact us at any time for a one-stop solution to their granulation challenges.
Compound fertilizer granulators primarily include four types: drum granulators, double roller granulators, disc granulators, and stirring tooth granulators. Below, we provide a detailed introduction to the features and advantages of each type of fertilizer making machine.

Drum Granulator

Double Roller Granulator

Disc Granulator

Stirring Tooth Granulator

Drum Granulator (The Preferred Choice for Large-Scale Compound Fertilizer Production)

The drum granulator is one of the most widely used and mature granulation devices in the compound fertilizer industry. It is particularly suitable for large-scale production of cold and hot granulation, as well as high-, medium-, and low-concentration compound fertilizers. As the core choice for large-scale compound fertilizer manufacturers, it enjoys extremely high market penetration and can meet the production demands of 1–20 tons per hour. Its operating principle involves an electric motor driving the drum to rotate. Material enters the drum through the feed end. Through the rotational force of the drum and the action of internal scrapers, the material continuously rolls and collides. Simultaneously, steam heating or binder spraying can be introduced to allow the material to agglomerate into pellets under suitable temperature and humidity conditions. The pellets are finally discharged from the discharge end, completing the granulation process. This design eliminates the need for traditional scraper mechanisms and enables automatic removal of lumps and irregularities.
Its core advantages include:

1. High production capacity and efficiency, stable operation, and continuous, uninterrupted production. It easily meets large-scale production demands while offering low power consumption and maintenance costs;
2. High pellet strength, smooth appearance, and excellent particle uniformity. The pellets are resistant to breakage, leading to high drying efficiency, reduced drying energy consumption, and enhanced market competitiveness of the finished fertilizer;
3. Wide raw material adaptability: It can process various compound fertilizer raw materials, including mixed materials such as organic, inorganic, and bio-fertilizers, without the need for strict control of raw material fineness, offering strong adaptability;
4. The cylinder is lined with special rubber sheets or acid-resistant stainless steel, providing corrosion and wear resistance, a long service life, and convenient operation and maintenance, thereby reducing equipment wear and tear costs.

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Double Roller Granulator (Energy-Efficient and Versatile for Dry and Wet Materials)

The Double Roller Granulator is an energy-efficient granulation device widely used in small and medium-sized compound fertilizer production lines. It is particularly suitable for granulating dry and wet powder-based compound fertilizer raw materials, eliminating the need for a drying process. It is environmentally friendly and energy-efficient, and is widely applied in scenarios involving the mixed granulation of organic and inorganic fertilizers, enjoying high market recognition. Its operating principle is based on high-pressure physical extrusion molding technology, which requires no high temperatures or additional binders. A motor drives the twin rollers to rotate synchronously in opposite directions. When powdered or granular raw materials enter the gap between the rollers, they are subjected to gradually increasing high pressure. Through intermolecular forces, they combine into a dense cake-like mass. After crushing and screening, qualified granules are obtained, while unqualified granules can be returned for re-pelletization, ensuring high material utilization.
Its core advantages include:

1. Energy-saving and cost-effective: Forming at room temperature eliminates the need for drying, reducing energy consumption by 40%–60% compared to traditional granulators. Additionally, the absence of binders reduces auxiliary material costs and environmental pollution;
2. Simple operation and convenient maintenance: The equipment features a compact design with a short installation and commissioning cycle. Daily maintenance requires only checking roller wear and adding lubricant, resulting in minimal downtime for repairs;
3. Fast granulation speed and high yield, with high pellet strength and a breakage rate below 1%. The pellets are uniformly formed, and different shapes can be produced by replacing the roller surface grooves;
4. Wide adaptability to raw materials, capable of processing fertilizer raw materials such as urea and potassium chloride, as well as organic fertilizers and chemical raw materials. The return rate is low (below 10%), resulting in minimal material waste.

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Disc Granulator (Easy to Operate, the Top Choice for Small and Medium-Scale Operations)

The disc granulator is a classic and practical granulation device featuring a simple structure and high cost-effectiveness. It is widely used in small and medium-scale compound fertilizer and organic fertilizer production lines and is highly prevalent in agriculture and the chemical industry. It is particularly suitable for small and medium-scale production scenarios, can flexibly adapt to different production capacity requirements, and can be easily integrated into existing plant retrofits. Its operating principle involves feeding powdered raw materials into a rotating, inclined disc. Through the combined effects of gravity, centrifugal force, and friction, an appropriate amount of water or binder is sprayed onto the materials, causing them to form small seed balls. As the disc rotates, these seed balls continuously roll and absorb additional material to increase in volume, eventually forming qualified granules. Unqualified fine powder remains in the disc for further granulation, creating a closed-loop process.
Its core advantages include:

1. High pelletization rate of over 93%, with round and uniform pellets of controllable diameter to meet the needs of various fertilization scenarios; 90% of pellets can be controlled within a diameter of 3–5 mm;
2. Simple structure and easy operation, allowing even novices to quickly master it; the large disc’s tilt angle is flexibly adjustable, and it features three discharge ports to facilitate intermittent production and reduce labor intensity;
3. Low energy consumption and low operating costs. Energy consumption per ton of pellets is only 0.7–0.8 times that of traditional pelletizers. It requires no complex daily maintenance, has a low failure rate, and incurs minimal maintenance costs;
4. Smooth operation and robust durability. The bottom of the circular disc is reinforced with multiple radial steel plates to prevent deformation. The base is thickened and weighted, eliminating the need for anchor bolts, and ensuring a long service life.

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Stirring Tooth Granulator (High-Efficiency and Eco-Friendly, Specialized for Organic and Inorganic Fertilizers)

The stirring tooth granulator is an upgraded and optimized granulation device developed in recent years, specifically designed for the granulation of organic-inorganic compound fertilizers. It is particularly suitable for lightweight, fine-powder materials and is increasingly widely used in the production of bio-organic fertilizers and organic-inorganic compound fertilizers. Thanks to its high efficiency and ability to preserve microbial activity, it has become the preferred equipment for many manufacturers. Its operating principle utilizes the mechanical agitation force generated by high-speed rotation and the resulting aerodynamic force to continuously complete the processes of mixing, granulation, spheronization, compression, and polishing of fine powder materials within the machine. Without complex processes, it forms uniform spherical granules, and the particle size can be adjusted by varying the material feed rate and the main shaft speed.
Its core advantages include:

1. High granulation efficiency, reaching over 90%, with excellent sphericity (sphericity ≥ 0.7). The pellets feature high strength and an attractive appearance, with particle sizes controllable between 0.3 and 3 millimeters to meet diverse requirements;
2. Operates at ambient temperature without the need for drying, effectively preserving beneficial bacteria in the fertilizer (excellent bacterial retention). The resulting pellets have low moisture content, dry easily, and reduce subsequent processing costs;
3. Rational structural design ensures smooth operation. The equipment is robust and durable with a long service life. It is highly adaptable to fine powder materials; the finer the raw material particle size, the better the pellet quality;
4. Simple operation and environmentally friendly with no pollution. The granulation process generates minimal dust and low noise, meeting environmental policy requirements. It also enables integrated batching and granulation, ensuring uniform nutrient distribution in the finished product.

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Main Technical Parameters

Drum Granulator

Model	Barrel				Power	Prod Capacity	Overall dimensions L× W ×H	weight
	Inclination	Internal diameter	length	Rotation speed	Power	Prod Capacity	Overall dimensions L× W ×H	weight
	0	m	m	r/min	kw	t/h	m	t
ZG1.2×4	2-2.5	1.2	4	17	5.5	1-3	4.6×2.2×2.0	2.7
ZG1.4×5	2-2.5	1.4	5	14	7.5	3-5	4.8×2.8×2.3	8.5
ZG1.6×6	2-2.5	1.6	6	11.5	11	5-8	7.0×3.2×3.1	12.0
ZG1.8×7	2-2.5	1.8	7	11.5	15	8-10	8.3×3.5×3.3	18.5
ZG2.0×8	2-2.5	2.0	8	11	18.5	10-15	9.1×3.6×3.5	22.0
ZG2.2×8	2-2.5	2.2	8	10.5	22	15-20	9.5×4.4×3.9	28.0

Double Roller Granulator

Model	DZJ-Ⅰ-1.0	DZJ-Ⅰ-2.0	DZJ-Ⅰ-3.0	DZJ-Ⅰ-4.0	DZJ-II-1.0	DZJ-II-2.0	DZJ-II-3.0
Production capacity (t/h)	1-1.5	1.5-2.5	2.5-3.5	3.5-4.5	1-2	1.5-2.5	2.5-3.5
Power	15kw	18.5kw	22kw	45kw	15kw	18.5kw	22kw
Pressure roller size	Φ150×220	Φ150×300	Φ186×300	Φ300×300	Φ150×220	Φ150×300	Φ186×300
Feeding size	≤0.5mm	≤0.5mm	≤0.5mm	≤0.5mm	≤0.5mm	≤0.5mm	≤0.5mm
Finished product specifications	Φ2.5-φ10	Φ2.5-φ10	Φ2.5-φ20	Φ2.5-φ30	Φ2.5-φ10	Φ2.5-φ20	Φ2.5-φ20
Reducer type	ZQH350	ZQH400	ZQH400	ZQH500	special-purpose	special-purpose	special-purpose

Disc Granulator

Model	Inner diameter (mm)	Side height (mm)	Volume (m³)	Rotation speed (r/min)	Motor power(KW)	Capacity (t/h)	Reducer model
ZL10	1000	250	0.4	24	2.2	0.3-0.5	XW5-59
ZL15	1500	300	1.1	22	5.5	0.5-0.8	ZQ250-48
ZL18	1800	300	1.4	18	5.5	0.6-1.0	ZQ250-48
ZL20	2000	350	1.8	18	7.5	0.8-1.2	ZQ250-48
ZL25	2500	350	2.5	18	7.5	1.0-1.5	ZQ400-23
ZL28	2800	400	3.3	18	11	1.0-2.5	ZQ400-48
ZL30	3000	450	3.9	16	11	2.0-3.0	ZQ350-23
ZL32	3200	500	4.3	13.6	15	2.0-3.5	ZQ350-23
ZL36	3600	550	5.5	11.3	18.5	3.0-5.0	ZQ400-23
ZL45	4500	600	6.5	8	22	4.0-6.0	ZQ250-48