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Process flow of NPK fertilizer production line

Process flow of NPK fertilizer production line:

1. Ingredients:
Urea, ammonium nitrate, ammonium chloride, ammonium sulphate, ammonium phosphate (monoammonium phosphate, diammonium phosphate, heavy calcium, general calcium) and other raw materials are provided according to a certain proportion (according to market demand and soil test results in various places).

2. raw material stirring:
Stir the prepared raw materials evenly to increase the uniform fertilizer content of the fertilizer particles as a whole.

3. Granulation of raw materials:
Send the agitated raw materials to the fertilizer granulator machine for granulation (converted strand granulation can be used, and extrusion granulation can also be selected).

4. Particle drying:
The granules made by the granulator are sent to the dryer, and the moisture contained in the granules is dried to increase the strength of the granules and facilitate storage.

5. particle cooling:
The temperature of dried fertilizer granules is too high and it is easy to agglomerate. After cooling, it is convenient for bagging, storage and transportation.

6. particle classification:
The cooled granules are classified. The unqualified granules are crushed and re-granulated, and the qualified products are screened out.

7. Finished film:
Coating and coating the qualified products to increase the brightness and roundness of the particles.

8. Finished product packaging:
Keep the film-coated particles, that is, the finished product, in a ventilated place.