The granular organic fertilizer manufacturing process includes fermentation, crushing, mixing, granulation, drying and other processes. The production process of NPK fertilizer is similar. So after the granulation of the granular fertilizer production line, why should it be dried?
1. Fertilizer dryers increase the strength of the particles
There is no strict regulation on the strength of fertilizer granules. However, in the process of fertilizer commercialization, the particles with low strength are unfavorable to the transportation of commercialized packaging boxes. In the process of transportation, the low strength will increase the damage rate of particles. Therefore, in order to meet the needs of commercialization, in the manufacturing of NPK fertilizer, granular fertilizer also needs to be dried after molding.
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2. Fertilizer dryer can extend the storage period of pellets
As a commercial granular fertilizer, it takes time to store the fertilizer from packaging to application of crops. This requires the preservation of the fertilizer as long as possible without reducing the nutrients of the fertilizer. The loss of nutrients is often due to volatilization and reduced particle strength. After the fertilizer is dried, the storage and transportation period of the particles can be effectively extended.3. Fertilizer dryer can reduce the moisture of particles
The water content of the fertilizer raw materials is relatively high. Although the water content of the material has been reduced during the preliminary fermentation, smashing and mixing, and transportation, it is only reduced to the water content required for processing particles. According to the water content of the standard fertilizer ( Free water) should be ≤30%. The particles processed by the NPK fertilizer granulator have a moisture content between 20% and 40% according to the characteristics of the material. In order to meet the standard, drying and drying are indispensable.
Through the above three points, we can see the importance of fertilizer dryer. After granulation of common NPK fertilizer manufacturing process, drying process is realized by using dryer and cooler.