During the operation of the fertilizer production line, the fertilizer may have caking problems due to humidity, storage conditions or feedstock characteristics. Caked fertilizers not only affect sales, but also reduce the effectiveness of fertilization. In order to reduce losses, enterprises can re-process the caked fertilizer through reasonable secondary processing, so that it can restore liquidity and improve product quality. Here are some effective ways to recover.
1. Re-crush to improve particle uniformity
For the fertilizer that has been caked, it can be broken using a fertilizer crusher to make it suitable for granulation. Common crushing equipment are chain mill, cage mill and semi-wet material mill, the specific choice of which equipment, need to be determined according to the hardness and water content of fertilizer. After grinding, the fertilizer can be sent back to the NPK fertilizer production line for granulation to improve product quality.
2. Adjust the moisture content to prevent secondary caking
Caked fertilizers are usually caused by too much water. Therefore, when reprocessing, it is necessary to strictly control the moisture content. If the fertilizer is still wet after grinding, the drying equipment can be used to reduce the moisture and make it reach the appropriate standard. At the same time, anti-caking agents such as silicates or calcium carbonate can also be added to reduce the risk of caking during subsequent storage.
3. Re-granulation to improve market competitiveness
The crushed fertilizer can be granulated twice by the fertilizer granulator to restore its granular shape and improve the value of commodities. Common granulation equipment includes disk granulator, extrusion granulator and so on. After the re-granulated fertilizer, not only the appearance is more uniform, but also the fertilization effect is more stable, which can effectively reduce the loss of enterprises.
4. Screening treatment to ensure product quality
During secondary processing, screening equipment can be used to separate the qualified particles from the powder to ensure the quality of the final product. Qualified particles can be packaged directly, while unformed powders can be re-entered into the pelletizing process, reducing waste and improving production efficiency.