Poor performance of a rotary drum granualtor may be caused by the following factors:
1. Material properties: Excessive moisture in certain areas causes pellets to stick together, while too low moisture prevents pellet formation. Ensure uniform moisture content in the raw materials by using a spray humidification system to precisely control the moisture content (12%-18% is recommended). If the pellets are loose and fragile, unable to form stable spheres, then an appropriate amount of binder (such as bentonite, humic acid, lignin, etc.) should be added and thoroughly mixed with the material.
2. Equipment parameter issues: Excessive inclination causes the material to move too quickly and the dwell time to be insufficient. The solution is to adjust the inclination to ensure that the material is fully rolled into balls. Wear on the inner wall of the drum reduces its smoothness, preventing the material from rolling effectively. Regularly inspect the inner lining for wear and replace wear-resistant materials (such as rubber or stainless steel) promptly.
3. Operating process issues: Localized material accumulation results in uneven pellet sizes and shapes. Use a screw feeder or vibrating feeder to ensure uniform material delivery to the drum. If the material's residence time in the drum is too short, it won't fully pelletize. We can adjust the inclination and rotational speed to extend the material's residence time.
4. Other influencing factors: Install a particle shape analyzer to monitor real-time indicators such as roundness and particle size distribution, and dynamically adjust process parameters based on the results. Regularly provide operator skills training to ensure proper equipment use and establish standardized operating procedures to reduce human error.
These measures can effectively address the issue of poor performance of the drum granulator and improve the production efficiency and product quality of the organic fertilizer production line.
