The drum granulator is one of the key equipment in compound fertilizer and organic fertilizer industry. The drum granulator adopts special rubber plate lining or acid resistant stainless steel lining plate to realize automatic scar removal and tumor removal, and cancels the traditional scraper device.

The working principle of the drum granulator: the material enters the front end of the rotating cylinder from the feeding pipe (the slope of the feeding pipe should be greater than the natural inclination of the material). The steam inlet pipe at the front end of the cylinder ejects water vapor with a certain pressure. The nozzle of steam inlet pipe is located at the bottom of material. And the steam has a certain pressure. Therefore, the material can obtain some moisture evenly and form small particles. Because the cylinder has a certain slope. Under the action of gravity and friction force of lining plate, these small particles continuously move in the circumference and axis direction of the fertilizer granulator machine, and in the movement, the smaller particles gradually form particles of certain specifications. The process features of drum granulator are as follows

1. (1) The pelletizing rate increases from 50% to 60% to more than 95%;
2. (2) The yield is increased by more than 30% compared with the original, the particles are round and the surface is smooth;
3. (3) The drying temperature is low, 1 / 3 of coal is saved, and the moisture content of product is low.
4. (4) Control precision of nitrogen content: the nitrogen content of compound fertilizer can reach 25% ~ 28%, which can easily realize the production of high nitrogen and high potassium compound fertilizer;
5. (5) High particle strength can effectively prevent the compound fertilizer from pulverizing and caking;
6. (6) The operation flexibility is increased and the operation is stable. Especially after the internal modification of the dryer, the dryer can produce continuously for 6-8 months without sticking to the wall.