Tag: ring die granulator

organic fertilizer equipment

How to adapt a BB fertilizer blender to different raw material characteristics?

by organic fertilizer production line

BB fertilizer raw materials come in a variety of forms (granular, powdered, and fiber-containing). BB fertilizer blenders require targeted adjustments to accommodate these different raw material characteristics and avoid mixing problems.

For pure granular raw materials (such as urea and diammonium phosphate granules), which have relatively small density differences but are prone to rolling and stratification, the BB fertilizer blender should be equipped with guide plates within the mixer drum to guide the raw materials into upward and downward circulation and control the feed order. Adding the denser diammonium phosphate first, followed by the lighter urea, can reduce initial stratification. The speed can be appropriately reduced in the later stages of mixing to prevent excessive collisions between particles that could lead to breakage.

If the raw materials contain powdered ingredients (such as potassium chloride powder or trace element powder), a dustproof seal should be installed at the BB fertilizer blender feed port to prevent dust from escaping. Additionally, an atomizing humidifier (control the humidity to ≤15%) should be installed within the mixer drum. A small amount of humidification can enhance adhesion between the powdered raw materials and the granules, preventing dust from becoming suspended.

When the raw materials contain fiber organic fertilizer (such as fermented straw powder), it is necessary to use a paddle with a shearing function to prevent the fibers from entangled and clumping. At the same time, the fiber raw materials should be crushed to less than 3mm in advance to reduce mixing resistance. During the mixing process, the machine can be stopped and observed every 3 minutes. If fiber clumps are found, the paddle angle needs to be adjusted to enhance the shearing and dispersion effect to ensure that the fibers and granular fertilizer are fully integrated.

organic fertilizer equipment

Controlling pellet strength in ring die granulators: Key to fertilizer transportation and storage

by organic fertilizer production line

Pellet strength is a core performance indicator for fertilizer products. Ring die granulators require multi-step control to ensure pellets can withstand the pressure of transportation and stacking, minimizing breakage and loss.

First, consider the raw material ratio. If the organic matter content in production is too high (over 60%), binders such as clay and bentonite should be added (control the amount to 3%-5%) to increase the viscosity of the raw materials and lay the foundation for pellet strength.

If the proportion of inorganic fertilizer is high, the moisture content of the raw materials should be controlled between 14% and 16% to avoid pellet brittleness caused by too low a moisture content and easy sticking to the ring die granulator due to too high a moisture content.

Selecting the ring die granulator compression ratio is also crucial. The compression ratio (the ratio of the ring die aperture to the effective thickness) should be adjusted according to the fertilizer type. For organic fertilizers with high fiber content, a low compression ratio of 1:8-1:10 is recommended to prevent pellets from being too hard and easily broken. For compound fertilizers, a high compression ratio of 1:12-1:15 is recommended to enhance pellet density. During production, regular spot checks can be performed using a pellet strength tester. If the strength is insufficient, the steam supply to the conditioner can be temporarily increased (by 10%-15%).

In addition, the gap between the roller and the ring die should be controlled within a range of 0.1-0.3mm. A gap too large will cause the raw material to slip, resulting in insufficient pellet density; a gap too small will increase wear and affect pellet consistency. By synergistically controlling these three factors, the compressive strength of fertilizer pellets can be stabilized at above 20N, meeting transportation and storage requirements.

organic fertilizer equipment

In the fertilizer granulator series, which granulation method is most suitable for large-scale production?

by organic fertilizer production line

In the field of fertilizer production, granulation technology is a key link to improve the quality and efficiency of fertilizer. In the face of many fertilizer granulator series, choosing the most suitable for large-scale production of granulation methods, you need to consider many factors such as production efficiency, cost, product quality and operation convenience.
 

Fertilizer Granules Compaction Machine: representative of high efficiency

 
Fertilizer Granules Compaction Machine occupies a place in mass production for its high efficiency and good forming effect. The device extrudes material through a pair of rotating rollers to form particles. It is especially suitable for dealing with those materials with poor bonding, such as urea, phosphate fertilizer, etc., and can realize the molding of a large number of fertilizers in a short time. In addition, the Fertilizer Granules Compaction Machine consumes relatively low energy, is easy to maintain, is suitable for continuous and automated production processes, is one of the preferred equipment in large-scale production.

Flat-Die Pellet Machine: has high adaptability

 
A Flat-Die Pellet Machine is used to press the material into particles of the desired shape by pressing the mold. This granulation method is highly adaptable to materials and can handle a variety of different types of fertilizer raw materials, including organic and inorganic fertilizers. Another advantage of the Flat-Die Pellet Machine is that the shape and size of the pellets can be adjusted by changing the mold to meet different market needs. However, Flat-Die Pellet machines are slightly less productive than Fertilizer Granules Compaction machines and may require more mold replacement and maintenance work in mass production.

Rotary Drum Granulator: Uniform particle quality

 
Rotary Drum Granulator turns and rounds materials by rotating the drum and an internal copy plate to form particles. This granulation method is suitable for the production of high-quality organic fertilizers, because the Rotary Drum Granulator can fully mix and form the material at a slower speed, thus ensuring the uniformity and quality of the particles. Rotary Drum Granulator has low energy consumption and wear during the production process and is suitable for long continuous operation, as well as for mass production.

Disc Granulator: Easy to operate

 
Disc Granulator By rotating a disc, the material rolls on the surface of the disc and gradually gathers into particles. This granulation method is simple to operate, easy to control, and suitable for small and medium-sized production. The investment cost of Disc Granulator is relatively low, but its production efficiency and pellet forming effect may not be as good as that of Fertilizer Granules Compaction Machine and Rotary Drum Granulator. Therefore, it may not be optimal in mass production.

conclusion

 
Considering production efficiency, cost, product quality and operation convenience, Fertilizer Granules Compaction Machine and Rotary Drum Granulator have more advantages in mass production. Fertilizer Granules Compaction Machine, with its high efficiency and low energy consumption, is especially suitable for treating materials with poor adhesion, while Rotary Drum Granulator, because of its uniform particle quality and low operating cost, Suitable for the production of high quality organic fertilizer. According to the characteristics and production needs of different fertilizer raw materials, choosing the right granulator is the key to ensure the quality and production efficiency of fertilizer products.

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