Working principle of disk granulator

Disk granulator is that the raw meal powder is evenly moistened by atomized water in the double-shaft mixer to form a nucleus with a uniform particle size, and then it is sent into the ball-forming plate for ball formation. The water content of the material ball should be controlled at 12~14. Most of the water should be added in the double-shaft mixer, and only a small amount of supplemental water should be added to the ball pan, and the amount of supplemental water should be controlled at about 0~3. Dry powder granulation is directly added to the ball-forming disk, and an appropriate amount of water is sprayed. After the raw material ball core enters the ball-forming disc, it moves along the parabola under the action of centrifugal force, friction and gravity in the disk.

Due to the cohesiveness and plasticity of the material, the cores adhere to each other during the movement and gradually grow up. When the inclination angle of the ball, the height of the disc, the rotation speed and the water content are constant, the balls of different particle sizes will roll down at different breakaway angles due to different gravity.

In the process of continuous rolling, the material ball continuously expels the water in the ball out of the surface. Due to the cohesiveness of the material and the natural volatilization of the surface liquid film, the material ball has a certain strength. The disk granulator has the advantages of high ball formation rate, strong particle round hole strength, intuitive operation, convenient maintenance, etc.