What is a Fertilizer Disc Granulator?

In modern fertilizer production systems, a fertilizer disc granulator is a core piece of equipment for converting powdered fertilizer into granules. Widely used in organic and compound fertilizer production lines, it plays a crucial role in improving fertilizer utilization and optimizing the fertilization experience. Structurally, a fertilizer disc granulator machine consists of five main components: a disc, a transmission system, a frame, a slewing mechanism, and a spray device. The disc, the core working component, is typically welded from steel plates and often features a wear-resistant lining on its inner wall, extending the equipment's service life and reducing material adhesion. The transmission system, via a motor and reducer, drives the disc's smooth rotation, with speed flexibly adjustable based on material characteristics. The slewing mechanism ensures the disc remains level during operation, preventing material deviation and impacting granulation results. Its operating principle follows the principle of "agglomeration and granulation": When powdered fertilizer raw materials (such as decomposed organic fertilizer, nitrogen, phosphorus, and potassium mixed powders) enter the rotating disc, the disc's continued rotation causes the material to tumble continuously under the combined effects of centrifugal force, gravity, and friction. At this point, a spray device evenly applies an appropriate amount of binder (such as water or starch solution), gradually agglomerating the powdered material into small particles. The particles continuously collide and rub against each other within the disc, gradually becoming rounder and more compact. When the particles reach the set particle size (usually 2-5 mm), they automatically overflow from the edge of the disc, completing the granulation process. Compared to other granulation equipment, fertilizer disc granulators offer significant advantages: First, their simple structure and easy operation and maintenance make them suitable for small and medium-sized fertilizer production enterprises. Second, they offer a high granulation rate (typically exceeding 85%), strong granules, and resistance to breakage. Third, they offer low energy consumption, manageable operating costs, and strong adaptability to various materials, making them reliably capable of granulating both organic fertilizers after harmless treatment and compound fertilizers based on formulations. With the advancement of green agricultural development, demand for organic fertilizers and slow-release compound fertilizers continues to grow. Fertilizer disc granulators, with their high efficiency and practicality, have become a crucial bridge connecting fertilizer raw materials and agricultural production, providing strong support for promoting fertilizer industry upgrades and increasing grain production and income.