Rotary Drum Granulator – fertilizer production line

What organic fertilizers are there available for bamboo that provide sufficient nutrition value?

Written by fertilizer production line on September 9th, 2025. Leave a comment

Bamboo is known for its tough and fast growing properties and is an integral element in many garden and landscape designs. However, in order to ensure the healthy growth and good ornamental value of bamboo, the right fertilizer is essential. Organic fertilizers are ideal for growing bamboo because of their natural, environmentally friendly and soil-friendly properties. This paper will introduce several organic fertilizers suitable for bamboo, and discuss the related fertilizer granulator equipment.

1. Compost

Compost is an organic fertilizer made by microbial decomposition of organic matter, which is rich in nitrogen, phosphorus, potassium and other nutrients required for plant growth. For bamboo, compost provides comprehensive nutrients that promote root development and plant health. In the process of making compost, a Flat-Die Pellet Machine can be used to compress organic materials into pellets, which is not only easy to store and transport, but also can improve the uniformity and application effect of fertilizer.

2. Green manure

Green manure refers to the direct use of plant residues or the plant itself as fertilizer, such as the residues of legumes. This type of fertilizer is rich in nitrogen, which helps the bamboo grow quickly. In the production process of green fertilizer, Rotary Drum Granulator can effectively transform plant residues into granular fertilizer, improving fertilizer application efficiency and soil fertility.
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3. Animal feces

Animal manure is another common organic fertilizer, especially that of ruminants such as cattle and sheep, which is rich in organic matter and trace elements. These fertilizers can improve the soil structure and provide lasting nutrients for bamboo. When dealing with animal waste, the Disc Granulator converts it into uniform particles, facilitating uniform application and improving fertilizer utilization.

4. Humic acid fertilizer

Humic acid fertilizer is an organic substance extracted from plant residues and animal excrement, which has the function of improving soil structure, increasing soil fertility and promoting plant growth. For plants such as bamboo that require high soil conditions, humic acid fertilizer is a good choice. In the production of humic acid Fertilizer, the Fertilizer Granules Compaction Machine can mix humic acid with other fertilizer raw materials and extrude them into particles to improve the stability and application effect of fertilizer.

When choosing the right fertilizer granulator equipment, it is necessary to consider the raw material characteristics, production scale and economic cost of fertilizer. For example, a Flat-Die Pellet Machine is suitable for small-scale production, while Rotary Drum Granulator and Disc Granulator are suitable for large-scale fertilizer production. The Fertilizer Granules Compaction Machine is suitable for fertilizer production requiring high pressure molding.
In short, to provide adequate nutritional value of bamboo, choosing the appropriate organic fertilizer and the corresponding fertilizer granulator equipment is the key. Through scientific fertilization methods and advanced granulation techniques, it is possible to ensure that bamboo gets a balanced nutrition, promote its healthy growth, and also contribute to the sustainable development of the environment.

Key requirements for choosing granulators in NPK fertilizer production lines

Written by fertilizer production line on August 30th, 2025. Leave a comment

In compound fertilizer production, the granulator is the core equipment of an NPK fertilizer production line. It directly affects pellet quality, production efficiency, and product competitiveness. With the advancement of agricultural modernization, the market demands higher standards for NPK fertilizer granulation.

1.Strong Raw Material Adaptability

A quality NPK fertilizer granulator must handle various raw material ratios.It needs to work with mixes having different proportions of Nitrogen (N), Phosphorus (P), and Potassium (K).It should be able to process functional formulas that include added trace elements.It must handle raw materials with high moisture or high viscosity.

2.High Granulation Rate and Uniform Particles

A professional NPK granulator should achieve a granulation rate above 90%, minimizing recycled material.Particle size must be uniform, with over 85% of pellets sized between 2-4mm.Pellets should be well-rounded with a smooth surface finish.

3.Excellent Energy Efficiency and Environmental Performance

Modern NPK granulators need energy consumption per unit at least 20% below industry standards.They must include dust recovery systems, keeping dust emissions ≤30mg/m³.Noise levels should be controlled below 85 decibels.

4.Durable and Easy to Maintain

A quality granulator’s design should use wear-resistant alloy materials for key parts, ensuring a lifespan of over 5 years.Modular design allows for quick replacement of wear parts.Multiple access points provide ample space for maintenance.The lubrication system should be highly automated.

Granulator Selection Advice

Small lines (1-5 tons/hour): Disc Granulators are suitable.Medium lines (5-15 tons/hour): Rotary Drum Granulators are recommended.Large lines (15+ tons/hour): Prilling tower systems should be considered.

Selecting an NPK fertilizer granulator that meets these requirements will significantly boost production efficiency and product quality.

Understanding the material requirements for rotary drum granulators in fertilizer production

Written by fertilizer production line on August 28th, 2025. Leave a comment

The rotary drum granulator is central to modern fertilizer production, but it demands specific material properties. Knowing these is key to better efficiency and consistent product quality.

1.Physical Requirements

Raw material powder should be 80–200 mesh (180–75 μm). Particles that are too large or too small hurt both granule formation and strength. Good powder flow is also needed for even spreading inside the rotary drum granulator. Moisture content needs to stay between 2% and 5%—too much causes clumping, too little makes stable granules hard to form.

2.Chemical Makeup and Reaction Behavior

Fertilizer materials should dissolve moderately. Fully soluble or insoluble substances both complicate granulation. Materials with some clay minerals or organic matter form more stable granules. Neutral or slightly acidic pH usually gives the best results.

3.Heat Stability and Binding Ability

Since heat (60–80°C) is often used during granulation, materials must handle it without breaking down. They also need just the right stickiness—adjustable with binders like lignosulfonates.

4.Final Granule Quality

Good fertilizer pellets should have:Uniform size (1.5–4 mm), 90% granulation rate, 10 Newton/pellet crush strength, <2% dust content. Their surface should be smooth and dense, with an even internal structure for controlled nutrient release.

In short, knowing what a rotary drum granulator needs from your materials helps fine-tune your process—so you’ll get better pellets, more reliably.

Guide to selecting key equipment for bio-organic fertilizer production lines

Written by fertilizer production line on August 27th, 2025. Leave a comment

With the rapid growth of green agriculture and organic farming, bio-organic fertilizer production lines are becoming a popular choice in the fertilizer industry. However, the core of a production line lies in equipment selection.

1.Fermentation Equipment
Trough Compost Turner: Best for large-scale production. Ensures even turning and high fermentation efficiency.
Crawler-type Turner: Ideal for windrow composting. Offers flexibility and lower investment.
Closed Fermentation Tank: Highly automated, prevents odor leakage, and excels in eco-friendliness.
Selection Tip: Choose based on raw materials (like livestock manure, straw) and production scale. Ensure thorough composting to eliminate pathogens and weed seeds.
2.Crushing Equipment
Half-Wet Material Crusher: Handles high-moisture organic materials well. Prevents clogging and boosts efficiency.
Chain Crusher: Suitable for fibrous materials (like straw, mushroom residue).
Selection Tip: Consider material moisture and hardness. Aim for uniform particle size to improve mixing and granulation later.

3.Mixing Equipment
Double Shafts Paddle Mixer: Delivers high mixing uniformity for powders and granules.
Ribbon Mixer: Works well with sticky materials and mixes thoroughly.
Selection Tip: Opt for corrosion-resistant materials (like stainless steel) to avoid material sticking and improve efficiency.
4.Granulation Equipment
Disc Granulator: Fits small-to-medium production. Produces rounded, moderately strong granules.
Rotary Drum Granulator: High-capacity, ideal for large-scale continuous production.
Extrusion Granulator: Energy-efficient and good for high-density organic fertilizer shaping.
Selection Tip: Select based on market needs (granule size or hardness). Ensure finished products resist breakage for easy transport and application.

Choosing the right equipment for production line boosts efficiency and guarantees product quality—supporting the growth of green agriculture.

What types of phosphate fertilizers can a rotary drum granulator process?

Written by fertilizer production line on August 21st, 2025. Leave a comment

The rotary drum granulator is key equipment in phosphate fertilizer production, suitable for the granulation process of many types. It forms powder into granules through the tumbling action of a rotating drum, offering advantages like high output, good granule formation rates, and strong adaptability.

Phosphate Fertilizers Suitable for Rotary Drum Granulator:

1.Single Superphosphate (SSP)

SSP is a water-soluble phosphate fertilizer containing 14% to 20% available P₂O₅. Because it’s quite acidic, neutralizing agents (like lime or ammonia) need adding during granulation to improve how well the material sticks together. The rotary drum produces uniform SSP granules with good strength for storage and spreading.

2.Triple Superphosphate (TSP)

TSP has much higher P₂O₅content (44% to 52%) than SSP. Granulation requires careful moisture control (usually 8% to 12%) and adding binders (like bentonite or humic acid) to boost the granules’ strength and resistance to wear.

3.Ammonium Phosphate Fertilizers (MAP/DAP)

Monoammonium Phosphate (MAP): Contains 48% to 52% P₂O₅and 10% to 12% N. Granulation needs pH adjustment to prevent the material becoming too sticky, which affects granule formation.

Diammonium Phosphate (DAP): Contains 46% to 48% P₂O₅and 16% to 18% N. The higher nitrogen content means temperature control during granulation is important to prevent nitrogen loss.

4.Organic-Inorganic Compound Phosphate Fertilizers

These are made by granulating phosphate fertilizers (like SSP) mixed with organic materials (like composted manure or humic acid). The rotary drum mixes the materials evenly, creating granules that provide balanced nutrients and improve soil quality.

In summary, the rotary drum granulator is an ideal machine for making phosphate fertilizer granules. By choosing the right process settings, it produces strong, high-quality granules that improve fertilizer effectiveness and make spreading easier.

Cost Analysis of Chicken Manure Fertilizer Processing in an Organic Fertilizer Production Line

Written by fertilizer production line on August 21st, 2025. Leave a comment

Chicken manure is indeed a high-quality organic fertilizer raw material, rich in organic matter, nitrogen, phosphorus, potassium, various trace elements, enzymes, and microorganisms. Through standardized aerobic composting processes, it effectively degrades organic matter, kills parasite eggs and pathogens, and renders it harmless and stable. This can then be produced into commercial organic fertilizer through an organic fertilizer production line, creating economic benefits for chicken farms while fundamentally addressing environmental pollution.

However, processing chicken manure into commercial organic fertilizer does involve certain production costs, which can be primarily categorized into the following aspects. First, equipment investment is the core, one-time investment. A complete production line typically includes fermentation and compost turning equipment, a crusher, a mixer, a granulator, a dryer, a cooler, a screener, and an automatic packaging machine. The choice of granulator significantly impacts cost and product form. For example, a rotary drum granulator offers high output, a disc granulator offers a high granulation rate, and a flat die granulator is suitable for organic materials. Different granulator models have varying prices and energy consumption. Secondly, the costs of the pretreatment and fermentation processes cannot be ignored. Fresh chicken manure is sticky and moist, typically with a moisture content exceeding 70%, while the optimal fermentation moisture content needs to be adjusted to 50%-60%. Therefore, a large amount of auxiliary materials (such as straw, sawdust, and mushroom residue) are often required to adjust the moisture and carbon-nitrogen ratios. The procurement, transportation, and crushing of these auxiliary materials all incur ongoing costs.

The initial equipment investment for processing chicken manure in an organic fertilizer production line is relatively high, and ongoing operations also require ongoing investment. The cost level depends largely on the production scale, the degree of automation, the availability and price of raw materials, and the positioning of the final product. For large-scale chicken farms, although the initial investment is high, in the long run, the comprehensive benefits of addressing environmental pressures and creating economic value by turning waste into resources are significant, making the cost acceptable.

Comparing granule shapes from different fertilizer granulators: Choosing the best granulation process

Written by fertilizer production line on August 19th, 2025. Leave a comment

In fertilizer production, the choice of granulator directly affects granule shape, strength, and performance. Different granulation techniques produce distinct granule shapes suited for specific fertilizer types and market needs.

1.Rotary Drum Granulator: Spherical granules, smooth surface

Produces typically round, smooth-surfaced granules with uniform size. This shape works well for compound fertilizers, organic fertilizers, and BB blends, offering good flowability and crush strength for mechanical application.

2.Double Roller Press Granulator: Oblate or hemispherical granules

Forms mostly flat-round or half-spherical granules, sometimes with slight burrs on edges. The dense structure resists breakage, making it suitable for high-concentration compound fertilizers or organic-inorganic blends.

3.Flat Die Granulator: Cylindrical granules, varying lengths

Creates short cylindrical pellets with consistent diameter but lengths that may vary. These high-hardness granules fit organic fertilizers, bio-organic fertilizers, and feed additives.

4.Disc Granulator: Near-spherical granules, mixed sizes

Similar to rotary drum granulation but yields less regular, near-spherical shapes with a wider particle size range. Ideal for initial processing of organic or compound fertilizers—cost-effective but less uniform.

In short, selecting the right granulator improves fertilizer quality and production efficiency.

How to choose between a rotary drum granulator and a disc granulator?

Written by fertilizer production line on August 16th, 2025. Leave a comment

In the fertilizer, feed and other industries, disc granulators and rotary drum granulators are both common granulation equipment, playing a key role in fertilizer production lines. Understanding their differences can help companies choose the right equipment and achieve efficient production. From the working principle, when the disc granulator tilts the disc and rotates, the material continues to roll and agglomerate under the action of gravity, centrifugal force and friction. First, small particles are formed at the bottom of the disc, and then they continue to roll, absorbing the surrounding powder and gradually become larger. After reaching a certain size, they overflow from the edge of the disc to complete the granulation. The material of the rotary drum granulator rolls continuously in the rotating drum, and through water or steam, the basic fertilizer and other materials are fully reacted chemically in a wet environment, and the particles are agglomerated into balls under the extrusion force generated by the rotation of the cylinder.

In terms of equipment structure, the disc granulator is relatively simple. The core component is the tilted granulation disc, which is driven to rotate by the drive device. There are also disc inclination adjustment mechanisms, racks, feeding pipes, liquid sprayers, hanging plates, etc. The rotary drum granulator has a complex structure. The main body is a huge rotating cylinder, which is driven by a drive device. In addition, there are feeding systems, steam or gas supply systems, discharging systems, and complex control systems and auxiliary equipment such as temperature and humidity sensors.

The two have different focuses in their application areas. The disc granulator has a small investment and is easy to operate. It is a powerful assistant for small production plants and is widely used in small compound fertilizer plants, feed processing plants and small biomass fuel enterprises. The rotary drum granulator is like an industrial giant with high output and is suitable for large-scale production. It performs well in large-scale compound fertilizer and feed production enterprises and industrial raw material granulation processing.

Disc granulators and rotary drum granulators have their own advantages and disadvantages. Enterprises must make comprehensive considerations and careful choices based on their own production scale, material characteristics, product quality requirements and budgets to win development opportunities in the fierce market competition.

How is NPK fertilizer manufactured?

Written by fertilizer production line on August 5th, 2025. Leave a comment

NPK fertilizer, a compound fertilizer containing the three key nutrients nitrogen (N), phosphorus (P), and potassium (K), provides comprehensive nutrients for crops. Its production requires multiple precision steps.

First, the raw material pretreatment stage begins. Nitrogen fertilizer raw materials, typically urea and ammonium chloride, need to be crushed into a fine powder of 80 mesh or larger. Phosphate fertilizers, typically monoammonium phosphate and superphosphate, need to be de-agglomerated and ground. Potassium fertilizers, primarily potassium chloride and potassium sulfate, are screened and decontaminated before being crushed. The three raw materials are blended according to crop requirements. For example, a fertilizer specifically for corn might use a 15:15:15 ratio of nitrogen, phosphorus, and potassium.

Next, the mixing and granulation stages begin. The pretreated raw materials are thoroughly agitated in a mixer, and an appropriate amount of water or a binder (such as bentonite) is added to maintain a moisture content of 20% to 30%. The granules are then granulated using wet granulation equipment. Rotary drum granulators are commonly used for this process because they are suitable for large-scale production. The material is rolled and agglomerated within the drum to form granules with a diameter of 2-4 mm. Disc granulators are suitable for small and medium-sized production capacity, and the granule size can be controlled by adjusting the inclination angle.

After granulation, the granules are dried and cooled. They first enter a rotary dryer at 60-80°C to reduce the moisture content to below 5% to prevent clumping during storage. They are then cooled to room temperature in a cooler to prevent condensation during packaging.

Finally, they are screened and packaged. The cooled granules are classified by a vibrating screen. The fine particles are returned to the granulation stage for reuse. Qualified granules enter a film coating machine, where they are sprayed with an anti-caking agent, weighed, and packaged.

The entire process of the NPK compound fertilizer production line requires strict control of the raw material ratio and particle quality to ensure that the nutrients in the finished fertilizer are uniform and the strength meets the standards to meet the nutritional needs of different crops at different growth stages.

Rotary drum granulator production

Written by fertilizer production line on December 7th, 2019.

The rotary drum granulator machine is designed for producing the organic fertilizer granulator or inorganic fertilizer granulator.How can we use the rotary drum granulator machine to finish the fertilizer production process?

Different type fertilizer granulator machine are designed for producing the organic or inorganic fertilizer granulator.Different type fertilizer granulator machine has different working principle.The rotary drum granulator machine is designed for producing the organic or inorganic fertilizer granulator.There we share the principle of the working principle with you.
The drum granulation is a method of mixing and granulating powdery basic fertilizer with drum granulator,which is widely used in the granulation of compound fertilizer.The series of rotary drum granulator machine is designed for not only used in the compound fertilizer manufacturing process,it also can be used in the organic fertilizer manufacturing process to produce the organic fertilizer granulator.

The principle of the rotary drum granulator:First of all,the basic fertilizers are screened separatedly,and the screened materials are crushed by the crusher before screening.The material under the screen is sent to the respective hopper.When the pelletilizing system is in operation,each basic fertilizer is fed into the feed hopper through the metering equipment,conveying equipment and lifting equipment according to the proprtion requirements from each hopper at the same.At the same time,the return material also enters the hopper together with the basic fertilizer through the lifting equipment.There is a certain degree of mixing between the basic fertilizer and the returned material in the process of transportation and lifting,but it is more ideal to add a mixing equipment.The mixture in the feed hopper is fed to the rotary drum granulator at a certain feeding speed.At the same time,in the fertilizer manufacturing process,saturated steam is properly introduced into the bottom of the material layer,which not only improves the temperature of the material,but also makes the material wetted,which is conducive to granulation.If necessary,sprinkle a small amount of water or fertilizer solution on the material to maintain the best liquid volume of material granulation.The material forms a rolling bed by the friction action of the rotary drum granulator.The extrusion pressure generated by the rolling makes the material with certain liquid phase agglomerate into small particles.These small particles become the core,and the surrounding powder adheres to form large particles.As the drum granulator generally inclines to the discharge end at a certain angle,the granular material slowly rolls to the discharge port along the inclined direction of the cylinder while rotating with the cylinder.Qualified particles leave the drum granulator and enter the dryer for drying,and then pass through screening,cooling,coating,packaging and storage.After crushing,the upper part of the screen and the loweer part of the screen will be sent to the hopper as the return material and the basic fertilizer will be granulated at the same time.In the granulating process,we are besides the granulating method to be used to produce the fertilizer granulator,there is also designed the flat die granulator machine and the roller press granulator machine which are suitable for using the extrusion method to produce the fertilizer granulator.

In different type fertilizer production line,it is equipped with different type organic fertilizer machine,which are suitable for producing the organic fertilizer granulator,and the inorganic fertilizer granulator,which it is equipped in the compound fertilizer production line to produce the compound fertilizer granulator.In the fertilizer manufacturing process,using different type fertilizer machines to finish the fertilizer manufacturing production process not only improve the working efficient,it also save the waste of the raw materials.