Constructing a disc granulation production line requires comprehensive planning, taking into account process characteristics, site layout, material conditions, and equipment compatibility. This will help avoid problems such as poor particle size distribution, low granulation rate, high rework rate, and insufficient production capacity after commissioning. The key precautions are as follows:

First, raw material standards must be met. Disc granulation has extremely high requirements for material fineness, moisture content, and uniformity. Raw materials must be fully decomposed, thoroughly crushed, and screened, with a fineness controlled at 20-40 mesh and a moisture content maintained at around 30%. Materials that are too coarse will lead to deformed particles; excessive moisture will cause clumping and sticking to the discs; and insufficient moisture will prevent pellet formation, which are the main causes of granulation failure.

Second, equipment matching and layout must be reasonable. The production line needs to be equipped with precise batching, continuous mixing, and uniform feeding equipment to ensure uniform and stable material entering the discs. Sufficient length should be reserved in the workshop for drying, cooling, and screening lines to avoid insufficiently dry and weak particles due to short flow lines. The main disc granulator must be installed horizontally; otherwise, problems such as disc misalignment, uneven particle size, and reduced output will occur.

Strictly control the drying temperature again to protect the microbial strain. High-temperature drying is strictly prohibited for bio-organic fertilizer; the drying temperature must be controlled within 60–80℃, using a low-temperature air-drying process to prevent the inactivation of functional bacteria and ensure the finished product meets the live bacteria index. Simultaneously, dust removal equipment should be installed to improve the dust environment in the workshop and meet environmental protection production requirements.

Finally, ensure proper finished product recirculation and process debugging. Disc granulation results in a high recirculation rate of fine powder and broken particles, requiring a complete material return system to allow waste materials to be re-granulated. During the initial production phase, fine-tuning of the disc tilt angle, rotation speed, water spray volume, and feed rate is necessary to stabilize particle roundness and finished product qualification rate, ensuring long-term stable production and quality of the production line.