Disc Granulator

Disc granulator is a common industrial equipment, which is mainly used to roll and compact powdered or granular raw materials through a rotating disc to form uniform particles. According to different working principles and structural designs, disc granulators can be divided into many types, including inclined and horizontal types. This machine is widely used in fertilizer manufacturing, pharmaceutical, chemical and other industries to improve the physical properties of materials and facilitate subsequent processing.

Composition Structure

Main structure: The core part of the disc granulator is its circular rotating disc, which is usually made of strong and durable materials that can withstand continuous operation and material friction.

Drive system: The drive system usually includes an electric motor and a reducer, which is responsible for providing power and controlling the speed to ensure that the disc rotates smoothly at an appropriate speed.

Adjustment device: The adjustment device allows the operator to adjust the inclination angle of the disc, thereby controlling the residence time of the material on the disc and the final particle size.

Liquid spraying device: In some cases, the disc granulator is equipped with a liquid spraying system to add adhesives or other chemical additives during the granulation process to enhance the stability of the particles.

Discharge port: The material that has completed the granulation process is discharged through the discharge port. The design of the discharge port usually takes into account dust prevention and convenient collection of finished products.

Working Principle

【1】Raw material powder are uniformly wetted by atomized water in double-shaft mixer. Uniform pellet/granule/ball nuclear will be formed and be sent to granulating disc for pellet/granule/ball production. Pellet moisture shall be controlled at 12% to 14%. Majority of water shall be added in double-shaft mixer. Small amount of supplement water will be added in granulating disc. Supplement water amount shall be controlled from 0 to 3%.

【2】Dry powder will be directly added in granulating disc and spray proper amount of water. Under the function of centrifugal force, frictional force and gravity, raw pellet/ball/granule nuclear will move along a parabola. Owing to stickiness and plasticity, pellet/ball/granule nuclear will stick to each other and grow bigger gradually during moving process.

Owing to influence of parameters like disc inclination angle, disc rim height, rotation speed and moisture, material pellet/granule/ball with different particle size will leave disc rim and scroll down according to different separation angle under different gravity. Material ball/pellet/granule will constantly extrude inside moisture to material surface during scrolling process. Because of stickiness and natural volatilization of surface liquid film, material pellet/granule/ball holds certain strength and will be discharged from disc rim along with disc rotation.

Advantages

High efficiency: The disc granulator can efficiently convert powder materials into particles, improving the availability and market value of the materials.

Adjustability: By adjusting the rotation speed and inclination of the disc, the size and shape of the particles can be precisely controlled.

Versatile: Suitable for a variety of materials of different properties, such as fertilizers, certain types of mineral processing, etc.

Low energy consumption: Compared with other types of granulation equipment, disc granulators usually have lower energy consumption.

Easy to maintain: Simple structure, easy operation, relatively easy maintenance and repair, reducing operating costs.

In summary, the disc granulator has become an indispensable equipment in many industrial productions with its unique design, efficient production capacity and wide range of applications. For production processes that need to convert powdered materials into granular form, LANE’s disc granulator provides an efficient, economical and environmentally friendly solution.

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