FAQ:How can the issue of low granulation rates in NPK compound fertilizer production lines be resolved?
Answer: Low granulation rates in NPK compound fertilizer production are usually caused by issues with raw material moisture, the binding process, equipment parameters, or operational control—rather than equipment failure. Targeted adjustments can quickly improve the granulation rate and stabilize production capacity. First, precise control of material moisture is the key to improving the granulation rate. If NPK powder is too dry, the material fails to agglomerate, resulting in a significant increase in fine powder; conversely, excessive moisture leads to wall adhesion, caking, and the formation of malformed or "mushy" granules. Moisture levels must be adjusted according to the specific formula—typically maintained between 18% and 22% for standard compound fertilizers—while ensuring the material is mixed thoroughly to prevent separation into dry and wet layers. Second, optimize the spraying and binding processes. Whether using a disc granulator or a rotary drum granulator, i...