Core methods for improving the granulation process of NPK compound fertilizer production lines:

1. Raw Material Pretreatment Optimization: Select high-purity, uniformly sized nitrogen, phosphorus, and potassium raw materials. Through crushing, screening, and drying, remove large impurities and control the moisture content (generally recommended ≤10%) to provide high-quality base materials for subsequent granulation.

2. Precise Formula Control: Employ an advanced batching system to precisely proportion nitrogen, phosphorus, potassium, and other micronutrients according to product nutrient requirements, ensuring uniform mixing and avoiding granulation quality issues caused by localized nutrient imbalances.

3. Use of High-Efficiency Granulation Equipment: Disc granualtors or drum granualtors are recommended. By optimizing parameters such as rotation speed and tilt angle, improve particle roundness and strength, reduce fine powder and broken particles, thereby enhancing the product's anti-caking and flowability. 4. Adding Functional Additives

Before granulation or during the mixing stage, add appropriate amounts of binders, anti-caking agents, and other additives. Mix evenly using equipment such as a horizontal fertilizer mixer to improve the granulation performance of the material and reduce agglomeration and wall adhesion during production.

5. Optimized Post-Granulation Processing

After granulation, promptly dry, cool, and screen the granules to ensure adequate moisture content and suitable temperature, further improving the physical properties and storage stability of the finished fertilizer.

6. Automation and Intelligent Upgrades

Introduce an automated control system to achieve real-time monitoring and adjustment of raw material ratios and NPK blending machine operating parameters, improving production efficiency and product consistency while reducing human error.