The granule uniformity produced by an organic fertilizer disk granulator machine is at a medium-to-high level. Under standardized operation and reasonable process configuration, the proportion of qualified granules with the target particle size (usually 2-4mm) can reach 75%-85%. If the equipment parameters are further optimized and a grading and screening process is added, the proportion of qualified granules can be increased to 85%-90%, fully meeting the needs of commercial sales and large-scale application of organic fertilizers.

The core influencing factors of granule uniformity lie in the precise matching of equipment parameters and operating processes. The disc inclination angle needs to be controlled between 35°-55°, and the rotation speed adjusted to 10-25 r/min.  Proper coordination of these two parameters allows the material to form a stable rolling "material curtain" inside the disc, ensuring that the granules are subjected to uniform force during collision and agglomeration, preventing the stratification of large and small particles. At the same time, the material moisture content must be strictly controlled at 20%-30%. Too high a moisture content can easily lead to material sticking to the disc and forming large lumps, while too low a moisture content will prevent effective agglomeration and produce a large amount of fine powder.  Reasonable control of the return ratio (1:1-1:3), returning the screened fine particles back to the disc for granulation, can also significantly improve the consistency of granule size.

In terms of equipment comparison, the granule uniformity of the bio disk organic fertilizer machine is superior to that of the drum granulator because the material movement trajectory inside the disc is more controllable, and the granule agglomeration process is more stable. However, compared with the dry-process double roller press granualtor, its uniformity is slightly inferior, as the latter can precisely control the granule size through the mold aperture. For products such as organic fertilizers and bio-organic fertilizers that have moderate requirements for granule appearance, the uniformity performance of the disc granulator is perfectly adequate. If a secondary screening system is added to remove oversized granules and fine powder and recycle them for granulation, the particle size deviation can be further reduced, improving the quality of the finished product.