The flat die pellet mill represents a highly distinctive technological approach in the field of organic fertilizer granulation. Based on the principle of extrusion molding, it directly processes powdery or fibrous materials into cylindrical pellets, demonstrating strong adaptability in both bio-organic fertilizer and feed processing. The core structure of this equipment consists of a horizontally mounted annular flat die and a rotating pressure roller assembly above it. After the material is evenly fed into the working surface of the flat die, the pressure roller uses immense extrusion force to force the material into the radial channels of the flat die. The material is compressed and shaped within the channels and then extruded from the lower end of the die orifice, where it is cut into cylindrical pellets of the desired length by a cutter. The most prominent feature of the flat die pellet mill is its extremely wide range of adaptable raw materials.
When granulating various fermented organic fertilizers, this equipment eliminates the need for drying and crushing the raw materials before granulation, allowing for direct batching and processing into cylindrical pellets. This feature completely overturns the stringent requirements of traditional granulation processes regarding raw material moisture content and fineness, significantly simplifying the pretreatment process and saving energy consumption. The flat die pellet mill can handle the granulation of bio-organic fertilizers using peat, lignite, organic sludge, and straw as raw materials; the granulation of organic compound fertilizers using chicken manure and other organic fertilizers as the main raw materials; and the granulation of cake fertilizers using soybean cake and other similar raw materials.
In terms of pellet quality, the flat die pellet mill produces pellets with a smooth surface and moderate hardness, and a lower temperature rise during processing, which better preserves the internal nutrients of the raw materials. Due to the lower moisture content, the product is easier to store and transport. Regarding equipment reliability, the flat die pellet mill has an advanced structure and can adapt to 24-hour continuous operation. Its flat die and rollers use a threaded gap adjustment device, allowing users to easily adjust the extrusion gap according to material characteristics. The design of large-diameter pressure rollers results in high output, high pelleting rate, uniform and high-strength pellets. The equipment operates smoothly with low noise, low failure rate, and low power consumption per ton of material.
The versatility of the flat die pellet mill is particularly noteworthy—a single machine can produce not only organic fertilizer pellets but also feed pellets and biomass fuel pellets, filling a technological gap in the pelleting machinery field. For small and medium-sized enterprises looking to diversify their product lines with limited equipment investment, the flat die pellet mill undoubtedly offers a highly cost-effective technological option.
