Compound Fertilizer Production Line

Compound Fertilizer Production Line Introduction

Compound fertilizer production line is a series of equipment collection used to produce compound fertilizer granules, which can realize streamlined mass production and can be adjusted according to the production demand of fertilizer.

As a professional compound fertilizer production line equipment supplier, we provide high quality, environmentally friendly and advanced compound fertilizer production line equipment to help customers achieve high quality compound fertilizer production.

Compound fertilizer production line raw materials:
The raw materials commonly used in compound fertilizer production line mainly include nitrogen, phosphorus and potassium nutrients, as well as some trace elements and fillers. The following is a classification of commonly used raw materials and specific substances:

Nitrogen fertilizer (N): urea, ammonium nitrate, ammonia, ammonia gas.

Phosphorus fertilizer (P): monoammonium phosphate (MAP), diammonium phosphate (DAP), phosphoric acid.

Potash fertilizer (K): potassium chloride, potassium sulfate.

Fillers: limestone powder, gypsum.

Trace elements: zinc sulfate, iron sulfate, manganese sulfate, copper sulfate, etc., which are used to supplement the trace elements needed for crop growth.

In the compound fertilizer production line, the above raw materials are mixed, reacted, granulated and other processes according to the requirements of the specific formula and production process in order to make fertilizer products containing a variety of nutrients. Some additives and anti-caking agents may also be added during the production process to improve the quality and storage performance of the product. The finished product of the production line can be more guaranteed.

Compound fertilizer production line usually consists of the following main links:

1. Raw material preparation and processing
Raw material processing: in compound fertilizer production line, raw materials need to be crushed to particle diameter of less than 0.5 mm (500 microns), to ensure a uniform mixture, conducive to the subsequent granulation process. Vertical crusher or hammer crusher, crushing effect up to 80-100 mesh (0.15-0.18 mm), to ensure that the fineness and uniformity of raw material particles.

2. Mixing

Mixing equipment: horizontal mixer or double shaft mixer.

Mixing effect: the homogeneity of mixing can reach more than 90%, and there is no obvious layering phenomenon of each component.

Mixing process: the two mixing shafts of the mixer start at the same time. The two mixing shafts of the twin-shaft mixer rotate in pairs, and this design ensures that the materials are fully mixed during the mixing process. During the rotation of the mixing shafts, the material is pushed to both sides of the mixer and then back to the center, forming a cycle. Each mixing shaft is equipped with several sets of mixing paddles, the paddles can be set at different angles and shapes according to the needs, and they can also play the role of breaking up and pushing, and finally the well-mixed materials will be sent out through the outlet at the end of the cylinder.

3. Granulation

Granulation equipment: rotary drum granulator or disk granulator.

Pellet diameter: the final pellet diameter between 2-5 mm, suitable for mechanical seeding and manual spreading.

Granulator process: After the raw material enters the rotary drum granulator, it is driven by the drum rotation in the drum to form a flowing material curtain. At the same time, the binder solution or water is evenly sprayed on the material curtain through the water pipe nozzle above the drum, which makes the surface of the raw material wet and starts to nucleate. Wet raw materials in the drum rotation, mutual collision and adhesion, and gradually form the initial particles. These initial particles continue to roll, collide and aggregate inside the drum, gradually increasing in size to form particles of a certain size.

Meanwhile, the size and uniformity of the granules can be controlled by adjusting the rotating speed, angle, spraying volume and feeding volume of the drum.

Granulation rate: The granulation rate of high quality granulator can reach more than 90%, that is, more than 90% of raw materials can form granules successfully.
Moisture ratio: the moisture content of granules after granulation is usually 10-15%, which needs further drying treatment.

4. Drying

Equipment: Drum dryer, hot air furnace, burner.

Drying process: The heat source can be a combustion furnace, electric heater or other heat source device, providing high temperature hot air into the dryer. The temperature and flow of hot air are adjusted according to the material characteristics and drying requirements. After the material enters into the drum dryer, it is constantly thrown and rolled by the lifting plate on the inner wall in the drum, and fully contact with the hot air.

The hot air transfers heat to the material through convection, conduction and radiation, and the moisture in the material evaporates rapidly. With the rotation of the drum, the material gradually moves from the feed end to the discharge end. In this process, the material undergoes a drying process from high humidity to low humidity and from high temperature to low temperature.

Drying effect: After drying, the moisture content of the granule is reduced to 2-5%, which ensures the hardness and storage stability of the granule.

5. Cooling

Cooling equipment: rotary drum cooler, fan, etc.

Cooling process: the dried fertilizer particles enter the drum cooler through the belt conveyor, along with the continuous rotation of the drum, through the lifting plate flipping, fully in contact with the cold air, the fertilizer particles from high temperature down to room temperature, to avoid the problem of deformation caused by the temperature is too high.

6. Screening

Screening equipment: rotary vibration sieve or drum sifter.

Screening process: fertilizer particles are sent into the sieving machine, through the rotating or vibrating way through the screen, the fertilizer particles according to the size of the distinction and sent out from different outlets.

Screening standard: customers can choose different specifications of the screen according to their own needs, in order to screen out the required specifications of the particles, unqualified particles returned to the material crushed and re-pelletized.

7. Packing

Packaging equipment: automatic packaging machine.

Packaging specifications: usually 25 kg / bag or 50 kg / bag, can also be customized according to customer demand.

Packaging accuracy: packaging error control in ± 0.2%, to ensure that the weight of each bag of products is accurate.

Our compound fertilizer production line equipment is well-designed, easy to operate, efficient and stable, which can significantly improve production efficiency and reduce production costs. All the equipments are designed with full consideration of environmental protection requirements, adopting advanced waste gas and waste water treatment system to reduce the environmental pollution in the production process, which is in line with the green production standard.

If you have any questions or interest in compound fertilizer production line, please feel free to contact us!