The new type organic fertilizer granulator——also known as a stirring-tooth granulator——is a piece of equipment specifically designed for granulating organic fertilizers and organic-inorganic compound fertilizers. It utilizes high-speed mechanical stirring forces and the resulting aerodynamic effects to continuously process fine powdery materials through stages such as mixing, granulation, spheronization, and densification, thereby achieving the granulation objective.
The granulator features a casing made of thickened seamless steel pipe, ensuring robustness, durability, and resistance to deformation; this is complemented by a stable base design that guarantees smooth operation. The equipment comprises a motor, a gearbox, a rotor assembly (shaft, stirring teeth, and tooth heads), a cylindrical body (divided into feeding/mixing, granulation, and polishing sections), and a frame. The stirring teeth are made of special materials for high hardness and wear resistance, while the tooth heads utilize alloy steel tips, ensuring the equipment's stability and durability during long-term operation.
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After pre-treated organic raw materials (with a moisture content of approximately 20%-40%) enter the rotating drum, high-speed rotating stirring teeth subject the material to intense agitation, shearing, and mixing, ensuring uniform distribution and initial agglomeration.
Driven by the mechanical force of the stirring teeth, the moist material is squeezed and kneaded, gradually forming tiny granules (“nuclei”). These granules bind together through capillary forces and mechanical pressure, with moisture and the material's inherent adhesiveness facilitating the bonding process.
As the drum rotates, centrifugal force causes the granules to roll along the inner wall——creating “snowballing” effect——whereby fine powder continuously adheres to the outer layers, causing the granules to grow in size. The intermittent action of the stirring teeth effectively prevents excessive clumping, ensuring granule uniformity.
The formed granules are separated via a screen at the discharge outlet; granules that are too small or too large are screened out and returned to the system for re-granulation.
The new type organic fertilizer granulator is suitable for granulating a wide range of organic fertilizer raw materials, including livestock and poultry manure (chicken, pig, cattle, and sheep manure, etc.), composted manure, green manure, seaweed fertilizer, oil-cake fertilizer, peat, mixed soil-based fertilizers, industrial/agricultural waste by-products, microbial materials, and fermented organic municipal solid waste. This machine is particularly effective for granulating lightweight, fine-powder materials; the finer the basic particles of the powder, the higher the sphericity and quality of the resulting granules.
The stirring-tooth granulator offers unique advantages in granulating coarse-fiber materials that are difficult to process with conventional equipment. Materials such as crop stalks, distillers' grains, spent mushroom substrate, and herbal medicine residues can be granulated after fermentation; it also delivers excellent granulation results for raw materials like humic acid and municipal sludge.
The new type organic fertilizer granulator is widely used in organic fertilizer plants, large-scale livestock farms, and organic waste treatment facilities. It is highly adaptable, suitable for operations ranging from family farms and small workshops to large-scale organic fertilizer production plants.
The granules produced by the new type organic fertilizer granulator are spherical, with a sphericity of ≥0.7. They are uniform in size and regular in shape; the finished granules feature smooth surfaces and high strength, making them resistant to breakage and pulverization. Particle size can generally be controlled between 0.3 and 5 mm, with a granulation rate exceeding 90%. The compressive strength of the organic fertilizer granules is superior to that produced by disc or drum granulators, and the proportion of oversized granules is kept below 15%.
Compared to natural agglomeration granulation equipment (such as disc or drum granulators), the stirring-tooth granulator offers the advantages of a concentrated and easily controllable particle size distribution. It operates with higher efficiency and is better suited to the demands of large-scale production.
Ease of Operation and Low Maintenance Costs
Modern stirring-tooth granulators are typically equipped with automated control systems, ensuring simple and convenient operation with features such as one-touch startup and automatic parameter adjustment. The equipment features a relatively simple structure, utilizes wear-resistant materials for key components, offers a long service life, and is easy to maintain.
Taking Huaqiang Heavy Industry’s stirring-tooth granulation line as an example, a complete organic fertilizer production line encompasses the following key stages:
A horizontal semi-wet material crusher is used to initially process raw materials—such as animal manure and agricultural waste—breaking them down to a suitable particle size for subsequent processing.
A twin-shaft paddle mixer is used to uniformly blend the crushed materials with other auxiliary ingredients. The moisture content of the mixture should be controlled at approximately 35%–40%.
A trough-type compost turner is used to ferment the mixed materials, promoting the decomposition and maturation of organic matter. Once fermented, the material is crushed before proceeding to the granulation stage.
The new type organic fertilizer granulator processes the fermented material into spherical granules. Granule diameter can be adjusted by varying the material feed rate and the main shaft rotation speed; generally, a lower feed rate and higher rotation speed result in smaller granules, and vice versa. Huaqiang’s stirring-tooth granulator achieves a granulation rate of over 96%.
Dryers and coolers are used to remove excess moisture from the fertilizer granules and lower their temperature, respectively.
A screening machine ensures the consistency and quality of the fertilizer granules; granules that do not meet specifications are returned for re-granulation.
An automatic packaging machine handles the final packaging of the fertilizer, enhancing overall production efficiency.
Zhengzhou Huaqiang Heavy Industry Technology Co., Ltd. provides a comprehensive service system covering everything from pre-sales to after-sales support.
Based on customer needs, we dispatch technical personnel to the site for a free survey and assessment, followed by site planning and production scheme design tailored to the specific conditions. We determine the appropriate equipment models and specifications based on actual requirements——or provide custom designs to meet special needs——and outline the complete production line workflow for the client.
We provide dedicated after-sales personnel to guide on-site installation and commissioning until the system is fully operational. We train operators and relevant technical staff until the client is capable of independent production and has mastered the necessary technical knowledge and machine maintenance skills. Our after-sales team offers 24-hour support to ensure the long-term, stable operation of the equipment.
Huaqiang Heavy Industry manufactures equipment in accordance with international quality standards to ensure reliability and stability. Core components feature low failure rates, and routine maintenance—such as checking for agitator pin wear and replenishing lubricant—is simple enough to be performed by general workers.
| Model | Capacity (t/h) |
Output Granules Size (mm) |
Motor Power (Kw) |
Outside Dimension (mm) |
| YSL-60 | 1-2 | 1-5 | 37 | 3700*1800*1050 |
| YSL-80 | 2-4 | 1-5 | 45 | 3700*2100*1300 |
| YSL-100 | 3-5 | 1-5 | 55 | 3750*2500*1500 |
| YSL-120 | 4-7 | 1-5 | 75 | 4900*2950*1900 |
| YSL-150 | 5-8 | 1-5 | 90 | 5000*3300*2150 |
Our company provides clients with complex fertilizer complete sets of equipment technical service, after many years of research and development experience of the compound fertilizer granulator equipment manufacturing , and the meticulous manufacture of hi
This machine is one of the main (biological) organic fertilizer production equipment produced by our company. It is the fertilizer machinery which has been studied, improved and carefully manufactured on the basis of advanced granulating machine at home and abroad.
This series of granulator is a new patented product developed by our company and the Agricultural Machinery Research Institute. It is designed and manufactured by the new technology of wet continuous push rod granulation.
