Professional compound fertilizer granulator, NPK fertilizer plant
Technological process
The process flow of compound fertilizer production line is raw material batching → mixing → crushing and caking → granulation → primary screening → particle drying → particle cooling → secondary screening → finished particle coating → quantitative packaging of finished products.
1. Ingredients of raw materials
urea, ammonium nitrate, ammonium chloride, ammonium sulfate, ammonium phosphate (monoammonium phosphate, diammonium phosphate,
heavy calcium, common calcium), potassium chloride (potassium sulfate) and other raw materials can be selected in a certain
proportion (mainly determined according to local market demand and local soil test results);
2. Mixing and stirring
mix the prepared raw materials evenly to improve the overall uniform fertilizer efficiency content of fertilizer particles, and
use horizontal mixer or disc mixer for mixing and mixing;
3. Caking and crushing
Smash large agglomerates of raw materials mixed and stirred evenly to facilitate subsequent granulation processing, mainly using chain crusher;
4. Material granulation
the evenly stirred and crushed materials are sent to the granulator through the belt conveyor for granulation (rotary drum granulator, counter roll extrusion granulator, disc granulator, etc.) this step is an essential and important link in the process flow of the compound fertilizer production line;
5. Primary screening
preliminary screening of particle semi-finished products. Unqualified particles are returned to the mixing and mixing link for reprocessing. Generally, drum screening machine is used;
6. Particle drying
the particles made by the granulator and screened at the first stage are sent to the dryer to dry the moisture contained in the particles, increase the particle strength and facilitate storage. Generally, the rotary dryer is used;
7. Particle cooling
the temperature of dried fertilizer particles is too high and easy to agglomerate. After cooling, it is convenient for bagging, storage and transportation. It is cooled by a cooler;
8. Secondary particle classification
the cooled particles are classified, the unqualified particles are crushed and re granulated, and the qualified products can be screened by a secondary drum screening machine;
9. Finished product particle coating
coating qualified products to increase the brightness and roundness of particles and make their appearance more beautiful. Generally, the coating machine is used for coating;
10. Quantitative packaging of finished product particles
the coated particles, that is, the finished product particles, are sent to the silo through the belt conveyor for temporary storage, and then connected to the electronic quantitative packaging scale, sewing machine and other automatic quantitative packaging bags, which are placed in a ventilated place for storage, so as to realize full automation
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