1. The fineness of the material is not enough. (The degree of maturity is critical)
2. The material moisture is too large.
3. The material is not sufficiently viscous. (Calcium bentonite can be added)
4. The inclination angle of the disc is wrong. (adjustable)
5. The spray position is wrong, causing uneven particle size.
6. There is no return material, and no material enters into the granulator.
The above are the conclusions that we have reached after studying the customer's pelletizing production line.
First of all, water spray granulation does not require very high materials, but the requirements for the beautiful particles are higher. The finer the material, the drier (the disadvantage is that the dust is larger), and it is easy to produce millet-like particles when spraying. During the rotation of the disc fertilizer pellet machine, due to gravity, there is an obvious partition between the particles and the powder, and the particles will have a rolling process from top to bottom. At this time, the role of the granulator is very important. Spray on the top, and then the small particles will be dipped into powder to become 2.5mm-5mm product particles. Generally, during granulation, the spray is placed between the granules and the powder, so that new granules are formed, and small granules can be made into finished granules. The granules from the granulator enter the dryer and are heated to about 60 degrees. Come out, enter the cooler, use the temperature difference to quickly remove the heat and moisture of the particles, then the moisture of the particles will drop below 25%, and then enter the particle sieving machine to distinguish small particles, finished particles, and oversized particles. The most important thing is It is to return the sieved small fertilizer pellets to the organic fertilizer granulator (exceeding standard particles are pulverized into small particles or powder by the chain mill), and the small fertilizer pellets turns into finished particles. Repeatedly, the yield rate will be very large.
In general, if the above points are well mastered, there is no problem with good granulation. The main thing is to see the experience of the granulator, do more experiments, and sum up the experience.