Organic fertilizer granulation is the process of turning organic fertilizer raw materials into spherical or similar shaped small particles. The main purpose of this is to facilitate storage, transportation, and application, while also improving the appearance appeal and commercial value of fertilizers. Here are several commonly used organic fertilizer granulators and their process characteristics and advantages:
Working principle: By rotating the disk, the material is subjected to centrifugal force and gradually aggregates into balls under moist conditions.
Scope of application: Widely used in granulation of various organic fertilizers, compound fertilizers, mineral powders, etc.
Advantages: Simple structure, easy operation, able to adapt to various materials; High granulation rate, uniform particles, and moderate strength.
2. Extrusion granulator
Working principle: By using a pair of relatively rotating rollers, the material is forced through a specific shaped mold hole to form columnar or rod-shaped particles.
Scope of application: Suitable for materials that are difficult to form through conventional disc granulation methods, such as low moisture and low viscosity organic compounds.
Advantages: High particle hardness, good wear resistance, especially suitable for long-distance transportation and storage.
3. High tower granulator
Working principle: Using high-temperature and high-pressure gas injection to solidify liquid or semi-solid materials into particles during the descent process.
Scope of application: Mainly used in the fertilizer industry, especially suitable for large-scale continuous production.
Advantages: High production efficiency, high particle strength, beautiful appearance, and good water solubility.
Working principle: Within the drum, materials are formed into particles of varying sizes through humidification, stirring, and rolling.
Scope of application: Suitable for various types of fertilizers and chemical raw materials.
Advantages: Solid particles, uniform size distribution, simple equipment maintenance, and flexible operation.
5. spray drying granulator
Working principle: The solution or slurry is sprayed into hot air through a high-speed rotating atomizer, rapidly evaporating moisture and forming particles.
Scope of application: Commonly used in industries such as medicine, food, and chemistry, as well as for certain special organic fertilizers.
Advantages: High product purity, minimal loss of active ingredients, fast drying speed, suitable for sensitive materials.
Each granulation method has its unique advantages and limitations, and the choice of granulation process needs to be comprehensively considered based on factors such as material properties, expected product characteristics, and production capacity. For example, for organic fertilizers containing a large amount of cellulose and lignin, a disc granulator may be the preferred choice, while products that require high durability and impact resistance may be more suitable for extrusion granulation or rotary drum granulation processes. Reasonable selection of granulation equipment and technology can greatly improve the performance of organic fertilizers and meet the diverse needs of the market.