What are the key operating points for a rotary drum granulator?

A rotary drum granulator is core equipment for large-scale compound fertilizer production, and its operating status directly impacts pellet quality and production efficiency. Understanding key operating precautions can reduce malfunctions, increase production capacity, and provide continuous operation for compound fertilizer production lines.

Raw material ratio and moisture control are essential. Materials entering the drum must be precisely mixed according to the recipe to ensure a stable ratio of nitrogen, phosphorus, potassium, and other components, avoiding nutrient imbalance in the pellets due to uneven raw materials. Moisture content must also be strictly controlled. Excessive moisture content can easily cause the material to stick to the wall and clump, while excessive moisture content can lead to low pellet formation efficiency. This requires real-time adjustment through online monitoring.

Operating parameters must be precisely adjusted. Before starting the machine, calibrate the drum speed and set an appropriate value based on the material's characteristics. Excessive speed can result in overly fine pellets, while excessively slow speeds can lead to insufficient compaction. The drum inclination angle must be matched to the speed and controlled within an appropriate range using support devices to ensure a uniform rolling layer of material within the drum. Furthermore, atomized binder should be sprayed evenly to avoid excessive amounts that can cause clumping.

Equipment maintenance should be performed regularly. After daily shutdown, clean any remaining material from the drum, especially at the junction of the drum wall and the lifting plate, to prevent hardening and impeding flow. Inspect the drive system weekly and re-grease the rollers and gears to ensure smooth operation. Inspect the wear-resistant lining on the drum wall monthly and promptly repair any damage to prevent direct wear on the drum.

Safety operating procedures must not be neglected. Operators must wear dust masks and gloves to prevent dust inhalation and contact injuries. Do not open the inspection window or reach inside the equipment while it is operating. Maintenance must be performed only when the machine is shut down and the power is disconnected. Regularly inspect the electrical control system to ensure that the emergency stop button, overload protection, and other devices are functioning properly to prevent potential hazards.

Strictly adhering to these precautions will ensure long-term, efficient, and stable operation of the rotary drum granulator, producing uniform, high-strength fertilizer, reducing losses and costs, and helping companies maintain a competitive advantage in the market.