The rotary drum granulator is a core piece of equipment in modern organic fertilizer production lines. Its granulation quality directly affects the product’s appearance, strength, and application effectiveness. Ensuring stable and reliable granulation quality requires comprehensive management across several areas, including raw material properties, equipment settings, and process control.
1.Raw Material Pre-Treatment Control
The particle size, moisture content, and mix ratio of the raw materials are fundamental factors influencing granulation quality. Control the raw material grind size to 1-2mm. Keep the moisture content of the mixed materials between 25-35%. Also, ensure all raw materials are thoroughly mixed to avoid composition fluctuations.
2.Equipment Parameter Optimization
Speed Adjustment: Adjust the drum rotation speed based on material properties, typically keeping it between 15-25 rpm.
Tilt Angle Control: Set the drum’s tilt angle appropriately (usually 2-5 degrees) to control material residence time.
Liquid Spray System: Precisely control the amount and location of binder spray to ensure uniform pellet formation.
3.Process Monitoring
Monitor the granulation temperature in real-time (ideally 50-80°C).
Regularly take samples to test pellet strength (should be ≥10N) and pellet formation rate (should be ≥90%).
Establish a complete process parameter recording system for easy quality tracing.
Through scientific raw material control, precise equipment adjustments, and strict process management, the granulation quality of rotary drum granulators can be significantly improved. Companies should develop robust quality control systems tailored to their specific product characteristics, and continuously optimize production processes to manufacture high-quality granular products.