NPK Fertilizer Rotary Drum Granulation Machine Production Line
Introduction For Producing Compound Fertilizer
Compound fertilizer can supply comprehensive nutrient for crops.
The production process of compound fertilizer is to combine the
main nutrient elements needed for crops (such as N, P, K and other
trace elements) by chemical method, that is, gather the nitrogen
fertilizer, phosphorus fertilizer, potash fertilizer and other
chemicals together and make into particles which are suitable for
farming. Then applied into the soil, so that crops can absorb the
nutrients they need from soil.
Raw Material For Producing Compound Fertilizer
Compound fertilizer is the fertilizer containing two or all three
of the three basic plant nutrients—Nitrogen, Phosphorus, and
Potassium, as well as microelements, such as B, Mn, Cu, Zn, and Mo.
The raw material can be powder or bulk, mostly are as below:
| Nitrogen | Phosphorus | Potassium |
| Calcium nitrate | urea | Single superphosphate | Kainit |
| Ammonium bicarbonate | Ammonium chloride | Rock phosphate | Potassium chloride |
| Nitrate of soda | Ammonium sulphate nitrate | Dicalcium phosphate | Potassium sulphate |
| Ammonium sulphate | Ammonium nitrate | Triple superphosphate | Potassium nitrate |
Working Principle Of Producing Compound Fertilizer
Raw material ingredients: Urea, ammonium nitrate, ammonium
chloride, ammonium sulphate, ammonium phosphate (monoammonium
phosphate, diammonium phosphate, and coarse whiting, ca), potassium
chloride, potassium sulfate and other raw materials are matched in
proportion (according to the market demand and the around soil of
test results).
Raw materials mixing: The mixture of the ingredients should be
mixed to improve the uniform fertilizer efficiency of the granules.
Granulation of raw material: The raw material after mixing equably
will be sent to granulator (drum granulator, and extruding
granulator both can be used).
Granulation drying: put the granulation into the dryer, and the
moisture in the granules will be dried, so that the granulation
strength is increased and is easier to store.
Granulation cooling: After drying, the granulation’s temperature is
too high and the granulation is easy to lump. While after cooling,
it is easy to bagging to save and transport.
Particle classification: the cooling particles that have been
cooled will be graded: the unqualified particles will be crushed
and regranulated, and the qualified products will be sift out.
Finished film: The qualified products are coated to increase the
brightness and roundness of granules.
Packaging of finished product: The particles that have been wrapped
the film are stored in the ventilated place.
Main Equipments of Producing Compound Fertilizer
| No. | Processes | Machines | Function of machines |
| 1 | Batching process | Automatic batching machine | Ratio raw materials by formula |
| 2 | Grinding process | Grinder | Grind granules to powder |
| 3 | Mixing process | Mixer | Mix powder evenly, If necessary, add water, or other micro-elements |
| 4 | Granulating process | Feeding machine | Feed mixed powder into granulator evenly |
| Granulator | Make mixed powder into fertilizer granules |
| 5 | Drying process | Dryer | Dry fertilizer granules to low moisture by hot air |
| Hot stove | Generate hot air to dryer |
| Cyclone | Collect dust from dryer |
| 6 | Cooling process | Cooler | Cool fertilizer granules to normal temperature |
| Cyclone | Collect dust from cooler |
| 7 | Screening process | Screener | Screen out required size from fertilizer granules |
| 8 | Coating process | Coating machine | Coat color, anti-blocking agent, microelements etc on fertilizer
granules |
| 9 | Packaging process | Air compressor | Generate power to packaging machine |
| Packaging machine | Package fertilizer granules into bags |
Characteristics of Compound Fertilizer Production Line
The compound fertilizer production line has less investment, quick
results and good economic benefits. The whole equipment process is
compact, scientific and advanced. Energy saving and consumption
reducing, no waste removal, stable operation, reliable running,
convenient maintenance. The adaptability of raw materials is wide,
and the machine is suitable for the granulation of compound
fertilizer, medicine, chemical industry, feed, etc., and the
granulation rate is high.
