Granulators are highly versatile machines that play a crucial role in modern agricultural practices. Organic and compound fertilizers often rely on different types of granulators, with drum granulators, disc granulators, and roll extrusion granulators being some of the most popular choices. Among these, disc granulators and roll extrusion granulators are particularly favored due to their widespread applicability in producing organic and compound fertilizers.
The disc granulator stands out for its unique design, where the spindle and disc operate either at an incline or horizontally. During the production process, a spray device is mounted above the disc to regulate the moisture content in the raw materials. This granulator is equipped with a reducer directly connected to the motor, ensuring smooth startup, reducing shock loads, and extending the lifespan of the equipment. Reinforced by multiple radial steel plates at the base, the disc granulator is robust and resistant to deformation. Its thickened, weighted, and sturdy foundation design allows for seamless operation without requiring anchor bolts. With a straightforward structure, high durability, ease of maintenance, and user-friendly operation, the disc granulator achieves a high pelletization rate with consistent particle size. Raw materials are fed uniformly into the disc and form spherical pellets under the influence of gravity and centrifugal force. This granulator is known for its reliability, low energy consumption, ease of adjustment, and excellent performance.
The roll extrusion granulator, on the other hand, is renowned as a "versatile granulator" in fertilizer production. It comprises three main sections: granulation, crushing, and screening. Built from a carbon steel structure, the extrusion rollers are crafted using specialized wear-resistant materials like 20 chromium manganese titanium. This model boasts cost-effectiveness, consistent output, and adaptability to various organic and compound fertilizers. One of its key advantages is eliminating the need for conventional drying and cooling processes, making it an ideal choice for small-scale enterprises.
The drum granulator is another standout option, featuring a cylinder lined with either special rubber plates or acid-resistant stainless steel. This lining facilitates automatic scar removal and tumor elimination, negating the need for traditional scraper devices. The drum granulator excels in terms of pellet strength, aesthetic quality, corrosion resistance, wear resistance, low energy consumption, and extended operational life. Maintenance and operation are straightforward, contributing to its popularity.
Inside the drum granulator, chemical reactions and heat treatments occur within the cylinder when substances like steam, gas ammonia, or phosphoric acid solutions are introduced. Alternatively, a small amount of water can be added to facilitate the cold granulation of compound fertilizers. As the cylinder rotates, the material being processed adheres together at specific humidity and temperature levels, forming pellets through a cohesive bonding process.
These granulators represent significant advancements in fertilizer production technology, offering farmers and manufacturers reliable, efficient, and sustainable methods to enhance crop yields while maintaining environmental balance.
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