The process flow of compound fertilizer production line can usually be divided into: raw material batching, raw material mixing, raw material granulation, particle drying, particle cooling, particle grading, finished product coating, and finally finished product packaging.

　　Production process

　　1. Raw material ingredients: urea, ammonium nitrate, ammonium chloride, ammonium sulfate, ammonium phosphate (monoammonium phosphate, diammonium phosphate, dicalcium phosphate, tricalcium sulfate), potassium chloride (potassium sulfate) and other raw materials are prepared in a certain proportion (based on market demand and soil testing results in various regions).

　　2. Raw material mixing: Mix the prepared raw materials evenly to increase the overall uniform fertilizer content of the fertilizer particles.

　　3. Raw material granulation: Send the mixed raw materials into a granulator for granulation (a rotary drum granulator or an extrusion granulator can be used).

　　4. Particle drying: Send the particles made by the granulator into the dryer to dry the moisture contained in the particles, increase their strength, and facilitate storage.

　　5. Particle cooling: The temperature of the dried fertilizer particles is too high, making them prone to clumping. After cooling, they are easy to store in bags and transport.

　　6. Particle grading: Classify the cooled particles, grind and re pelletize the unqualified particles, and sieve out the qualified products.

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

　　8. Finished product packaging: Pack the particles that have been coated with film, that is, the finished product, into bags and store them in a well ventilated area.