What is a rotary drum granulator?

The drum granulator is a type of granulation equipment capable of processing powdered materials into uniform granules. it is also known as a rotary drum granulator. Its primary function is to transform powdered raw materials into smooth, compact granules, thereby addressing issues such as dust generation and caking, while also facilitating transportation. In industrial and agricultural applications, it is widely used in the granulation of fertilizers such as compound fertilizers, organic fertilizers, and bio-organic fertilizers. It is also employed in the processing of powdered materials in the chemical and mining industries, making it an indispensable piece of production equipment for many enterprises.
Today, the drum granulator has become the mainstream equipment in the fertilizer granulation sector, found in everything from large-scale chemical fertilizer plants to small and medium-sized organic fertilizer processing facilities. Its application scope is exceptionally broad, capable of processing both chemical raw materials such as nitrogen, phosphorus, and potassium, as well as organic materials like livestock manure and crop straw. It meets the production requirements for cold and hot granulation, as well as for high-, medium-, and low-concentration compound fertilizers. It can flexibly adapt to a wide range of operations, from small-batch production in small workshops to large-scale mass production in major factories.

Its operating principle is straightforward: an electric motor drives an inclined drum to rotate slowly. After materials enter through the feed end, they are continuously tumbled, collided, and mixed under the combined effects of centrifugal force and gravity. Combined with processes such as spray coating and binder addition, the materials gradually aggregate into granules, which are finally discharged from the outlet, enabling continuous batch production. Compared to disc granulators and extrusion granulators, it offers distinct advantages: high processing capacity, with hourly output per unit far exceeding that of disc granulators; uniform granulation and high formation rates of over 85%; strong adaptability, allowing for multi-purpose use without frequent equipment changes; and stable operation, capable of 24-hour continuous operation with lower maintenance costs.
If your company is involved in fertilizer production—whether manufacturing compound fertilizers, organic fertilizers, or granulating raw materials such as livestock manure and crop straw—the drum granulator is an excellent choice. If you operate on a large scale and require high-efficiency mass production, it can meet your capacity needs; if you handle a complex variety of raw materials, it can flexibly adapt to different substances, eliminating the hassle of switching equipment; and if you seek convenience and efficiency, its simple operation and low failure rate can significantly reduce labor and maintenance costs. Choosing a drum granulator not only boosts production efficiency and ensures product quality but also lowers production costs. Whether you’re a newcomer to the industry or an established plant looking to upgrade, it is a highly cost-effective granulation solution.