Coating Machine
The fertilizer coating machine is widely used in the fertilizer post-processing stage due to its uniform coating capabilities, ease of operation, and reliable performance. The internal structure of the drum is optimized to ensure thorough tumbling of granules and even distribution of the coating agent, resulting in a high-quality coating finish. The spraying system and powder feeding device are easily adjustable, allowing for precise control over the coating agent dosage. Operating in a sealed environment minimizes dust emissions and maintains a clean workplace, making this a key piece of equipment for enhancing fertilizer quality and marketability.
Working Principle
Granular material enters the rotating drum and is continuously tumbled and dispersed to form a “material curtain.” Liquid coating agents are evenly sprayed onto the curtain via atomizing nozzles, or powdered coating agents are uniformly distributed by a feeder. As the granules tumble within the drum, their surfaces are evenly coated. As the material moves toward the discharge end, the coating layer stabilizes and cures, and the finished product is discharged.
Performance Features
High coating uniformity: Thorough tumbling ensures every granule surface is fully coated.
Excellent anti-caking effect: Coated granules remain loose and free-flowing, extending shelf life.
Precise dosage control: Metering pumps for liquids and variable-frequency feeders for powders ensure accurate coating agent application.
Sealed, eco-friendly operation: The enclosed drum design minimizes the escape of dust and odors.
Easy maintenance: Simple structure, easy-to-clean nozzles, and minimal daily maintenance requirements.
Maintenance Procedures
Check spray lines and nozzles every shift; promptly clear and clean any clogged nozzles to maintain uniform spraying. Remove any coating residue adhering to the inner drum walls and the inlet/outlet ports.
Check the powder feeder for normal operation and inspect the screw blades for wear on a weekly basis.
Check the lubrication status of the drive system monthly; replenish gearbox oil and bearing grease as needed.
Clean the liquid coating agent storage tank and piping quarterly to prevent blockages caused by sediment.
Replace worn support roller bearings and seals during the annual overhaul.
