2026/05/21
High-fiber raw materials such as straw, rice husks, sawdust, mushroom residue, and vines are loose in texture, have long fibers, poor viscosity, and are difficult to clump together. Therefore, the selection of a granulator should prioritize materials with specific characteristics, and ordinary disc granulators should be avoided.
The preferred choice for high-fiber raw materials is a new type two in one organic fertilizer granulator. This machine relies on internal high-speed rotating teeth to powerfully shear, knead, and compress, cutting long fibers and promoting rapid agglomeration into granules. It is suitable for raw materials with a moisture content of 30%-50%, allowing direct feeding of wet materials without deep drying. It offers fast granulation speed and stable output, making it the mainstream model for high-fiber organic fertilizer production, suitable for small to medium-sized scale production.
For larger-capacity sites, a rotary drum granulator can be used. The material inside the drum continuously tumbles and rubs, and with the addition of an appropriate binder, coarse-fiber materials are gradually coated and shaped. It has a large processing capacity and stable operation, suitable for large-scale organic fertilizer production lines. The disadvantage is that the granule roundness is generally lower, requiring strict control of the feed fineness.
Double roller press granulators are only suitable for crushing extremely fine, high-fiber dry materials. The raw materials must be thoroughly crushed, with moisture content controlled below 20%. High-pressure extrusion molding produces high-hardness, non-loose granules, eliminating the need for drying. This is energy-saving and convenient, making them suitable for producing columnar granular organic fertilizer.
Disc granulators are not recommended. High-fiber materials lack sufficient viscosity, making it difficult to roll into balls, resulting in extremely low granulation rates and a high likelihood of loose material and poor pelleting.
In actual production, high-fiber raw materials need to be pre-crushed and refined to remove extra-long fibers. Material moisture content should be appropriately adjusted, and the finished granules should be screened using screening equipment. The appropriate machine type should be determined based on site capacity and budget, prioritizing granulation rate and production continuity, reducing wear and tear on vulnerable parts, and improving overall production efficiency.
