Flat die extrusion granulator and flat disc granulator (usually referred to as disc granulator) play important roles in the production process of organic fertilizers, but there are significant differences in their working principles, scope of application, and product characteristics. The following is a specific comparison of the processes of two types of granulators:
working principle
Flat die extrusion granulator
Principle: The flat die extrusion granulator uses two sets of parallel arranged ring dies and pressure wheels to interact with each other, forcing the pre treated material into the die hole and extruding it under high pressure to form a continuous columnar material. When the columnar material leaves the mold hole, it will naturally fracture into particles of the required length due to the release of internal and external stress.
Characteristics: This type of machine is suitable for a variety of materials, especially for materials with certain hardness and adhesion, the effect is better. The high pressure during the granulation process helps to increase the density of particles, making them stronger and less prone to fragmentation.
Principle: The working basis of the disc granulator is to use the centrifugal force of the rotating disc to promote the rolling and aggregation of materials entering the disc in a moist state, gradually forming spherical particles. Under the frictional force on the inner wall of the disc, the material rolls along the inclined surface, and as the disc rotates, the particles continue to grow until they reach the desired size.
Characteristics: The particles prepared by the disc granulator are mostly approximately spherical, with a beautiful appearance and good flowability. It is more suitable for processing materials with certain viscosity and has certain requirements for the initial moisture content of the materials. Excessive or insufficient moisture content can affect the granulation effect.
Scope of application and product characteristics
Applicable materials: Suitable for most types of dry powder materials, including but not limited to organic fertilizers, biomass fuels, chemical raw materials, etc.
Product features: High granulation strength, regular particle shape, controllable size, suitable for long-distance transportation and mechanized application.
Disc Pelletizer
Applicable materials: mainly used for processing materials with certain humidity and bonding ability, such as animal manure, sludge, urban garbage and other organic waste.
Product features: The granulation process is mild and will not damage the active ingredients in the material. The produced particles have good solubility and are suitable for soil improvement and crop fertilization.
conclusion
The flat die extrusion granulator and the flat plate granulator each have their own advantages, and the choice depends on specific production needs, material properties, and expected particle characteristics. Flat die extrusion granulator is more commonly used in industrial production due to its high particle strength and wide adaptability; The disc granulator, with its unique granulation principle and product aesthetics, has become the preferred choice for many enterprises that focus on organic fertilizer production and pay attention to the appearance quality of granules. In practical applications, the most appropriate decision should be made based on one’s own production conditions and product positioning.