Factors Affecting the Production of Compound Fertilizers Using a Disc Granulator

fertilizer granulator Aug 21, 2025

When producing compound fertilizers using a disc granulator, many factors influence granulation, such as disc diameter, disc speed, disc inclination, nozzle aperture, and moisture content. Generally speaking, disc inclination has a greater impact on the granulation rate, while disc speed has a greater influence on the compressive strength of the granules.

The moisture content of disc granulation significantly influences both the granulation rate and the compressive strength of the granules. When the moisture content of the material is controlled within the range of 16%-20%, the granulation rate and compressive strength of the granules are optimal. Too little moisture results in a low granulation rate; too much moisture causes the material to clump and stick together, resulting in a reduced granulation rate. When the moisture content is too low, the compressive strength of the granules increases with increasing moisture content, which is beneficial for improving the compressive strength of the granules. However, when the moisture content is too high, the excess moisture disrupts the interactions between fertilizer molecules, causing the dried granules to crack and resulting in a decrease in compressive strength. Before using a disc granulator, the optimal moisture content, disc speed, and disc inclination angle should be tested to ensure high fertilizer production line efficiency and high pellet quality. Furthermore, the finer the raw material powder, the better the granulation effect.

Disc granulators are widely used in organic fertilizer production lines and compound fertilizer production lines. Fertilizer production using disc granulators offers low investment, high output, simple process, and intuitive operation, resulting in excellent economic and social benefits.

Application of Disc Granulators in NPK Fertilizer Production Lines

fertilizer granulator Aug 20, 2025

In the NPK fertilizer production line, disc granulators are a widely used and highly favored granulation equipment.

The disc granulator‘s structure is relatively simple yet unique. It primarily consists of an inclined disc, a drive mechanism, and a spray system. The disc, the core of the granulation process, is typically constructed of high-strength steel to ensure it can withstand the various forces involved in the granulation process. The drive mechanism provides stable rotational power to the disc, ensuring it rotates at an appropriate speed.

The disc’s operating principle is based on the movement and interaction of the materials within the rotating disc. When the mixed NPK fertilizer raw materials are fed into the rotating disc, the disc’s tilt and rotational motion cause the materials to roll upward along the disc’s inner wall due to a combination of centrifugal force, friction, and gravity. During this rolling process, a spray system applies a binder to the material. The binder acts like “glue,” gradually binding the loose raw material particles together and causing them to aggregate and grow. Over time, these agglomerated particles continuously roll and collide within the disc, further compacting and shaping them, ultimately forming relatively uniformly sized round granules that roll off the disc’s edge, completing the granulation process.

Disc granulators offer numerous advantages. First, they produce fertilizer granules with high roundness, excellent appearance, and strong market competitiveness. Second, they are relatively simple to operate and easy to master, requiring minimal operator skill. Furthermore, disc granulators are highly adaptable and can produce fertilizer granules of varying sizes to meet diverse market demands by adjusting parameters such as disc speed, tilt angle, and binder spraying rate to meet specific production needs.

However, disc granulators also have limitations. For example, compared to some large-scale granulation equipment, their production efficiency may be relatively low, making them less suitable for large-scale industrial production. Furthermore, when processing high-viscosity raw materials, material may stick to the disc, affecting granulation efficiency and equipment operation. Nevertheless, due to their unique advantages, disc granulators still play an important role in the production of NPK compound fertilizers by small and medium-sized enterprises, as well as in production scenarios where the appearance of fertilizer granules is a high priority.

How to adjust the conveying capacity of the belt conveyor

fertilizer granulator Aug 19, 2025

Adjusting the conveying capacity of the belt conveyor can be achieved through the following methods:

1. Adjust the motor speed: Adjusting the motor speed is one of the common methods to change the conveying capacity of the belt conveyor. The frequency converter can accurately control the motor speed, thereby adjusting the conveying speed.

2. Adjust the drive roller diameter: Replacing the drive roller can significantly change the conveying speed, but the cost is high, the replacement process is more complicated, and professional personnel are required to operate.

3. Adjust the belt tension: By changing the tension of the belt, the friction between the belt and the drive roller is affected, thereby adjusting the conveying speed. Appropriately increasing the tension can increase the friction and speed up the conveying speed.

4. Adjust the feed rate: By adjusting the opening size of the feed hopper or the feed speed, the amount of material entering the conveyor belt can be controlled, thereby adjusting the conveying capacity. Use an adjustable roller assembly The rollers in the adjustable roller assembly can be set at an angle, and the material gathers in the middle of the conveyor belt to prevent spillage.

5. Automatic control: Use the coal inspection modules set at intervals to determine the amount of coal transported on the belt conveyor, so as to accurately control the speed of the previous belt conveyor. At the same time, use the speed sensor to collect whether the speed of the previous belt conveyor after speed regulation is accurately adjusted. In abnormal cases, use the anti-slip protection device to terminate the operation of the belt conveyor, realize the function of controlling the speed of the belt conveyor according to the amount of coal, and reasonably consume electricity and material resources.

Through the above methods, the conveying capacity of the belt conveyor can be effectively adjusted to meet the production needs of different organic fertilizer production lines.

Selection skills of disc granulator fertilizer production equipment

fertilizer granulator Sep 15, 2020

Although the disc granulator machine has a slightly smaller output than the rotary drum granulator, it is still the main equipment for compound fertilizer production, and the fertilizer granules produced have a smooth appearance. Therefore, many companies have retained disc granulators in organic fertilizer production. Now that the disc pan granulator is still in use, what are some tips when choosing disc granulation equipment?

1. When choosing equipment, don’t be greedy for cheap, buy some equipment from small manufacturers. Although it was cheap at the time, it is easy to have problems such as this in the future use, which delays normal production. Not worth it.

2. When choosing a device, you must first choose a regular manufacturer. This is the most important, because even if there is a problem with our device in the future, we can find them and solve the problem. Our company’s consistent style is to provide follow-up guarantee services, so no matter what the customer has in the equipment we produce, we will seriously solve the problem until the customer’s problem is solved.

3. Pay attention to the quality of the equipment when purchasing the equipment. When selecting the organic fertilizer production line, we must go to the manufacturer to inspect it. During the inspection process, we should have a general understanding of the strength of the company and the quality of the equipment produced Wait.

Some precautions when using the disc granulator machine:

1. The disc granulating equipment should be checked between productions to see if the inside of the granulating disc is empty. In addition, the machine should be preheated before production.
2. Pay attention to changes in production temperature at any time during the production process and adjust in time.
3. Attention must be paid to the production of disc granulation equipment. Check whether the direction of disc rotation is reversed. If it is reversed, stop immediately to avoid other problems.
4. In fact, the equipment is the same as that of human beings, and they need to be checked and cleaned regularly. After a period of production, relevant staff must be arranged to check the machinery.

Supply efficient disc NPK fertilizer granulator machine

fertilizer granulator Sep 12, 2020

Disc granulator machine can be used in the high-efficiency NPK fertilizer production line of 5 tons per hour, which is suitable for the production of organic fertilizer and compound fertilizer. The disc pan granulator adopts arc disc angle structure, the granulation rate can reach more than 90%, the product particles are uniform, the machine runs smoothly, and the service life is long. Disc granulation machine is one of the granulators for NPK compound fertilizer production.

In the compound fertilizers production with different processes, the granular fertilizers with round appearance, gloss, uniform particle size, compact internal structure, uniform nutrient mixing and high strength are required not only to have finer materials and higher mixing degree, but also to have appropriate technological parameters and reasonable operating conditions.

As various fertilizer machine manufacturers, we supply organic fertilizer production equipment, compound fertilizer machinery, and different types of disc granulators. Disc fertilizer granulator varies with inner diameter, side height and rotational speed. According to the production conditions, combined with the plant budget, customers can choose their favorite production line to put into production. Our disc fertilizer granulator is your ideal NPK compound fertilizer granulator machine.

Production Characteristics of Disc Granulator Machine

Disc granulation machine is an important part of fertilizer manufacturing. Granular fertilizer is easy to transport and store. It has the characteristics of uniform granules and high granulation rate. In the process of fertilizer granulation, with the increase of inorganic fertilizer, the water content of fertilizer decreases when it is granulated. Appropriately shortening the granulation time can improve the granulation effect. The longer the granulation time is, the bigger the particle diameter is and the worse the effect is.

1.The granulator has three discharge ports, which facilitates intermittent production, greatly reduces labor intensity and improves labor efficiency.

2.The motor and speed reducer are driven by flexible belt to ensure smooth start and improve the service life of the equipment; the gear is quenched by high frequency, and the service life is doubled.

3.The disc is made of high-strength glass fiber reinforced machine inner lining, the machine is corrosion-resistant and has a long service life; the bottom of the disc is reinforced with multiple radiant steel plates, which is durable and never deformed.

Advantages of Bio-organic fertilizer Disc Pelleting Production

fertilizer granulator Jun 16, 2020

There are many beneficial microorganisms in bio-organic fertilizer, which can inhibit pests and diseases. Bio organic fertilizer is made of compost, inorganic fertilizer and microbial agent, and is processed into comprehensive high-quality fertilizer by organic fertilizer production equipment. Disc granulator machine is suitable for the organic fertilizer granulation, the granule strength is good. The raw material is made into spherical shape, which improves the physical properties of fertilizer products.

Raw materials for producing bio organic fertilizer

Decomposed chicken manure (or pig manure, sheep manure and other animal manure) compost, cake fertilizer
Microbial agent
Inorganic fertilizers such as ammonium sulfate, calcium superphosphate, potassium chloride and urea

Advantages of organic fertilizer

A large number of beneficial microorganisms can make them establish a good dominant population in the microecosystem of crop rhizosphere soil, thus restricting the growth and reproduction of pathogenic microorganisms to a great extent. Therefore, bio organic fertilizers can effectively inhibit the growth of harmful pathogenic microorganisms, and can significantly reduce the incidence of crop pests and diseases. In addition, if microorganisms such as Bacillus can be used to secrete antibiotics, these secreted antibiotics can effectively block part of pathogens and viruses during the propagation and growth of plant rhizomes. Therefore, biological organic fertilizer can effectively reduce soil diseases.

Organic fertilizer granulation equipment – disc granulator machine

Fertilizer disc granulator machine agglomerates the materials on the disc into granules through selection. In the production of organic fertilizer, when adding inorganic fertilizer nitrogen, phosphorus and potassium to granulate, it can be effectively granulated without adding industrial binder disc pelletizer. When ammonium sulfate is added only, the raw materials can not be effectively granulated, and when inorganic fertilizer nitrogen, phosphorus and potassium is added to granulate, the fineness of all kinds of raw materials in the fertilizer disc pelletizer machine can be effectively granulated.

Our factory is the well-known fertilizer machine manufacturers in China. In addition to the fertilizer pelletizer machine, we provide many kinds of organic fertilizer production equipment, such as rotary screening machine, crusher, drum dryer, cooling machine, organic fertilizer granulator, and granulator suitable for different raw materials.