The reason why the granular organic fertilizer production line needs to be dried after granulation

The production process of granular organic fertilizer includes fermentation, crushing and mixing, granulation, drying and other process stages. On the surface, since the granules are formed, is drying redundant? Not at all, and it is quite important. So why do we need to dry the granules after granulation? The reasons are roughly as follows:

1. Reduce the moisture content of granular organic fertilizer

As we all know, the moisture content of organic fertilizer raw materials is relatively high. Although the moisture content of materials has been reduced during the early fermentation, crushing, mixing and transportation process, it has only been reduced to a moisture content that is more suitable for processing granules. According to the "Organic Fertilizer Standard", the moisture (free water) content of organic fertilizer is ≤30%. The processed granules contain between 20% and 40% moisture according to the characteristics of the material. In order to meet the standard, drying is essential. Therefore, the granular organic fertilizer production line process cannot be separated from dryers and coolers.

2. Increase the strength of organic fertilizer granules

There are no strict regulations on the strength of granular organic fertilizer granules. However, in the process of commercialization of organic fertilizer, granules with too low strength are not conducive to the transportation of commercial packaging boxes. During the transportation process, the low strength causes the damage rate of granules to increase. Therefore, in order to meet the needs of commercialization. The granular organic fertilizer production line also needs to be dried after treatment.