The principle of drum granulation is that materials rely on surface tension, an appropriate amount of liquid phase, extrusion force generated by rolling between materials, and small particles are taken as the core in the correct movement direction of materials in the granulator to absorb large particles and adhere to small particles and form balls during rolling. The higher the rolling frequency in a certain time, the higher the balling rate and the rounder the particles are after forming. 
Working principle of rotary drum granulatorr:
The rotary drum granulator drives the belt and pulley by the main motor, drives the drive shaft through the reducer, and works opposite to each other through the open gear installed on the drive shaft and the big gear ring fixed on the body. The material is added from the feed end of the rotary drum granulator through the inside of the cylinder. Through the special structure inside the cylinder, it is made into particles, and finally outflow through the discharge port. Due to the continuous entry of materials and the continuous rotation of the rotary drum granulator, mass production of organic fertilizer production lines can be achieved.
Characteristics of rotary drum granulator:
1, rotary drum granulator less investment, fast effect, good economic benefits, reliable performance;
2, rotary drum granulator manufacturers, no waste emissions, stable operation, easy maintenance, reasonable process layout, advanced technology, rotary drum granulator quotation, low production cost of organic fertilizer equipment;
3, rotary drum granulator into high strength, good appearance quality, corrosion resistance, wear resistance, low energy consumption;
4, the cylinder is lined with special rubber plate or acid-resistant stainless steel lining plate, and the rotary drum granulator realizes automatic scar removal and tumor removal, eliminating the traditional device.
The organic fertilizer rotary drum granulator used in small and medium-sized fertilizer plants is a rotating circular granulator with a diameter of 1.2 – 2.4m and a length of 3 – 6m. A material retaining ring is arranged at the feeding end and the middle part of the simplified body, and the tail is smooth. The middle retaining ring of the organic fertilizer drum granulator divides the simplified body into two areas, the front area is the mixing granulation area, and the rear area is the particle polishing area.