Rotary drum granulator is one of the key equipment in compound fertilizer industry, which is suitable for cold and hot granulation and large-scale production of high, medium and low concentration compound fertilizer. The main working mode is granulation by wet granulation. Through a certain amount of water or steam, the basic fertilizer can be fully chemically reacted after being humidified in the cylinder. Under certain liquid phase conditions, with the help of the rotary motion of the cylinder, the material particles will produce extrusion pressure and agglomerate into balls.

Process flow of rotary drum granulator production line
Its granulation production process is to send each basic fertilizer raw material into its own storage hopper, according to the requirements of formula proportions, through the computer-controlled metering and conveying equipment, and sent into the raw material crushing or secondary remixing or storage hopper, each basic fertilizer, fine material and crushed coarse granules are returned to the granulation equipment through belts for granulation. The new blended raw materials are fed into drum granulator at a uniform rate according to the balling rate. At the same time, the saturated steam is fed into the material layer as required, so that the granulation process can be granulated at a lower moisture content, which not only raises the temperature of the material, but also causes the material to be humidified, thereby reducing the drying load. But, it needs to depend on the granulation rate, if necessary, a small amount of water or fertilizer solution may be sprayed on the material to maintain the optimum liquid phase for the granulation of the material. 

 Features:
1. Technological innovation, structural improvement, reasonable process layout, advanced technology and low production cost.
2. Drum granulation is characterized by high wear resistance, convenient maintenance, high ball forming strength, good appearance quality, corrosion resistance, wear resistance, low energy consumption, long service life, convenient operation and maintenance, etc.
3. High balling rate, high drying efficiency, balling rate up to 70%, with a small amount of returned material, the particle size of returned material is small, it can be re granulated; steam heating is introduced to improve the material temperature.
4. Reasonable layout, leading technology, small power, no three waste discharge, stable operation, convenient maintenance.