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Efficient Rotary drum granulator production line

The production line is used to produce 1 million tonnes of compound fertiliser per year. The line uses a rotary drum granulator with a large fertiliser granulation capacity and can be used to produce high, medium and low concentration compound fertilisers. Other machines in this fertiliser production line include batching machines, disc mixers, belt conveyors, rotary dryers, rotary coolers, rotary screens, rotary drum coaters, finished product warehouses, automatic packaging machines and chain crushers.

Rotary drum granulator production line

Applications of the production line

1. The rotary drum granulator line is widely adaptable to raw materials and can have urea, ammonium nitrate, ammonium chloride, ammonium sulphate, monoammonium phosphate (MAP), diammonium phosphate (DAP), single superphosphate (SSP), potassium chloride, potassium sulphate, etc. You can choose according to market demand and soil test results.

2、The rotary drum granulator fertiliser production line can produce compound fertiliser, organic fertiliser and organic compound fertiliser with N, P and K content ranging from 20-48%.

Rotary drum granulator production line

Advantages of the production line

1. Adopting advanced rotary drum granulator, the granulation rate can reach 70%.

2. The key components are made of wear and corrosion resistant materials, the equipment has a long service life.

3. Adopt plastic plate or stainless steel plate lining, the material is not easy to stick to the inner wall of the machine.

4. Stable operation, easy maintenance, high efficiency and low energy consumption.

5. Adopt belt conveyor to connect the whole line, reliable and continuous production.

6. Two sets of dust settling chambers are used to treat the exhaust gas, which is environmentally friendly.

7. Two screening processes to ensure uniform size of qualified particles.

8. Uniform mixing, drying, cooling and coating, the finished product has superior quality.

Rotary drum granulator production line

Rotary drum compound fertilizer production line workflow

1. Material proportioning The first process of the line is the proportioning process, in which various raw materials are proportioned according to the formula

2. Material mixing We use two units in this production line

raw materials. The mixer mixes the material sufficiently to improve the utilisation of the granular fertiliser. The inner side of the disc is made of polypropylene plates or stainless steel, which makes the raw material less sticky and wear-resistant. After mixing, the material will be discharged through an outlet at the bottom and fed to the fertiliser granulator via a belt conveyor.

3. Rotary drum granulator. With the continuous rotation of the cylinder, the material forms a rolling bed. With the resulting extrusion force, the material coalesces into small particles that become the core, attaching the powder around it to form a qualified spherical granule, which is finally discharged through the discharge end. Our rotary granulators have a very high fertiliser granulation rate, which can reach 70%. Lined with pvc plastic plates or stainless steel plates, the material does not easily stick to the cylinder.

4. Fertiliser drying Through a belt conveyor, the wet fertiliser enters the rotary dryer from the upper feed hopper. With the rotation of the cylinder, the wet fertilizer comes into contact and exchanges heat with the hot air drawn from the hot air oven in parallel, thus evaporating the moisture. The dried granules are discharged through the outlet at the lower end. The exhaust gas enters the dust settling chamber.

5. The hot fertiliser from the dryer is fed via a belt conveyor into the rotary cooler via the upper feed hopper.

The rotating cooler. As the barrel rotates, the material draws in cool air against the flow and exchanges heat, thus reducing the temperature. The cooled material exits at the lower end. The exhaust air enters the dust settling chamber.

6. First sieving

The first screening. As the cylinder rotates, the unshaped particles passing through the sieve holes are discharged through the outlet at the bottom and sent back to the mixer, while the shaped particles flow forward and pass through the cooled fertiliser particles at the lower end of the machine into the rotary sifter through the feed hopper at the upper end. The outlet is discharged. The rotary sieve uses a combination sieve, which is easy to maintain and replace

7. The secondary screening sends the previously process shaped granules to the second rotary sieve via a belt conveyor. Qualified granules are discharged through the bottom outlet and sent to the coating machine, while unqualified granules are crushed and sent back to the mixer for re-granulation. The vertical chain crusher is equipped with a wear-resistant chain and rubber lining for a long service life, and the material is not easily stuck to the inner wall.

8. Fertiliser coating The conveyor belt feeds the qualified granules from the second screen into the rotary coating

machine. With the rotation of the cylinder, the powder or liquid is evenly coated on the surface of the granules to prevent clumping and to increase the brightness and roundness of the granules. After coating, the fertiliser granules are discharged from the lower end of the cylinder.

9. Fertiliser packaging By means of a belt conveyor, the coated fertiliser is delivered to the finished product warehouse, where it is packed by an automatic packaging machine.

We have designed two finished product warehouses and packaging machines for this fertiliser line. The packaging machine automatically feeds, weighs, conveys and seals the fertiliser. The packaged fertiliser can be stored and sold.