Choosing the right chain crusher for the fertilizer industry

fertilizer granulator Oct 13, 2025

For fertilizer manufacturers, choosing the right chain crusher not only reduces production costs but also ensures stable production line operation. Many companies often make the mistake of focusing solely on throughput when selecting a grinder.
First, consider compatibility with the raw material characteristics. If primarily processing lightweight fiber materials like straw and rice stalks, focus on the density and toughness of the equipment chain to prevent fiber entanglement. If crushing hard, cake-like materials like soybean meal and cottonseed meal, emphasize chain material strength to ensure impact resistance.
Second, consider whether the processing capacity matches the production line. Calculate the equipment’s hourly throughput based on your daily production capacity, allowing for a 10%-15% margin to prevent overload due to feed rate fluctuations.

Finally, consider controllable crushing particle size. Different fertilizer products have different particle size requirements. For example, granular fertilizers require crushing to 2-5mm, while powdered fertilizers require finer particles. When selecting a chain crusher, confirm whether the equipment can adjust the particle size by adjusting the screen aperture and drum speed.
Finally, consider energy consumption and environmental protection. Prioritize equipment that matches motor power and processing capacity to avoid energy waste caused by a “big horse pulling a small cart.” Also, focus on the chain crusher sealing performance to minimize dust spillage during the crushing process and meet environmental protection requirements in the fertilizer industry.

Moisture proofing adaptation techniques for organic fertilizer production lines

fertilizer granulator Oct 11, 2025

During the rainy season, humidity is high, and organic fertilizer raw materials easily absorb moisture and clump together. This can lead to production line blockages and slow fermentation if not carefully considered. In fact, smooth production can be achieved by making three moisture-proof adjustments to the organic fertilizer production line.
Include a moisture control step in the pretreatment process. Install a small drying device before the pulverizer to reduce the moisture content of raw materials such as straw and manure from over 65% to 55%-60%, preventing wet materials from sticking to the pulverizer blades.
Add a moisture detector to the mixer outlet. If the raw materials are too wet, it will automatically prompt the addition of dry sawdust, eliminating the need for empirical judgment and reducing the risk of subsequent granulation blockages.

The fermentation process requires both rain protection and ventilation. Build a simple canopy over the fermentation pile to prevent rain from directly falling on it. After each turning, place a layer of dry straw on the surface of the pile. This absorbs moisture and allows for ventilation inside the pile, preventing stagnation. If the humidity in your workshop exceeds 80%, install several industrial fans in the fermentation area to improve air circulation and prevent the fermentation cycle from being extended during the rainy season.
The pelletizing process requires timely cleaning. During the rainy season, raw materials are prone to sticking to the pelletizer’s ring die. Every two hours of production, stop the fertilizer granulator and use a special scraper to clean the sticky material from the die holes. Don’t wait until it accumulates.
The conveyor belt at the discharge port can be covered with an anti-stick mat to prevent pellets from sticking, reducing cleaning time. With these adjustments, your organic fertilizer production line can operate as efficiently as normal during the rainy season, eliminating the need to worry about wet raw materials and slow fermentation.

How do new type organic fertilizer granulators reduce dust and noise?

fertilizer granulator Oct 10, 2025

Organic fertilizer plants now have to meet environmental standards, and dust and noise are prone to complaints. New type organic fertilizer granulators offer more comprehensive dust and noise reduction measures than traditional models, eliminating the need for extensive additional environmental protection equipment.
Let’s first discuss dust reduction. Both the feed and discharge ports feature dust-proof designs. The feed port features a soft dust cover that fits over the conveyor belt outlet, preventing dust from escaping as the material falls. The discharge port incorporates a “deflector + atomizing nozzle” system. As the granules emerge, the deflector guides them in a direction, while the atomizing nozzle sprays a small amount of water (just enough to wet the dust without affecting the particles) to suppress any raised fines. This reduces dust concentration in the workshop by over 60%, eliminating the need for separate, large-scale dust removal equipment.

Next, consider noise reduction. The new type organic fertilizer granulator features a soundproofing pad between the motor and the granulation chamber, resulting in a 10-15 decibel reduction in operating noise compared to traditional machines. For example, while traditional machines typically make a tractor-like sound, the new type organic fertilizer granulator’s operation resembles a washing machine spinning, allowing for normal conversation in the workshop without earplugs. Furthermore, its rollers and ring die work together more smoothly, eliminating the sharp noises caused by friction and preventing disturbance to nearby residents.

How can you prevent organic fertilizer from “fermenting and spoiling” when using a windrow compost turner?

fertilizer granulator Oct 9, 2025

Many people use windrow compost turners, thinking that “just turning it is enough.” In reality, they fail to pay attention to details, which can easily lead to spoiled compost (turning it black, smelling, or not fermenting thoroughly).
First, adjust the frequency of turning based on the compost temperature. If the compost temperature is below 45°C, microbial activity is low, so turning it every two days is sufficient. Avoid frequent turning. If the compost temperature exceeds 65°C, turn it once a day. Use a windrow compost turner to move the hot material to the surface to dissipate heat and prevent beneficial bacteria from being killed. This will keep the compost temperature stable at 50-60°C, ensuring optimal fermentation.

Second, check the moisture content of the compost when turning it. If the turned material sticks to the blades and cannot be shaken off, it is too wet. Sprinkle a layer of dry straw on the compost before turning it again. The compost turner will automatically mix it during turning. If the material breaks down and becomes dusty when turned, it is too dry. Spray water on it while turning it, and control the moisture content so that it can be clumped when held in the hand but falls apart when released.
Third, don’t forget to turn the “edge piles.” Many people only turn the large pile in the center, neglecting the smaller piles on the sides, which can cause them to under-ferment. A windrow compost turner can move in a “U-shaped” pattern, turning the center first, then moving around to the edges, bringing the material toward the center, ensuring every pile is turned.

How can we ensure that the effects of BB fertilizer containing functional additives are not lost through a blender?

fertilizer granulator Sep 30, 2025

When adding functional ingredients such as slow-release agents, biological agents, and trace elements to BB fertilizer, the BB fertilizer blender requires special adjustments to prevent the additive effects from being lost or unevenly distributed during the blending process.
Biological agents (such as Bacillus subtilis) are sensitive to high temperatures and easily inactivated. Therefore, two key controls must be implemented during blending: first, the blending temperature. By installing a cooling jacket on the BB fertilizer blender barrel, the chamber temperature can be kept below 35°C to prevent frictional heating from the blades, which could reduce the activity of the agent. Second, the mixing order: pre-mix the agent with 10 times the amount of carrier (such as humus powder) to form a “mother powder.” This should then be added after the blender has been running for 5 minutes. This minimizes direct friction between the agent and other ingredients and ensures a viable bacterial count retention rate exceeding 90%.

If adding a slow-release agent, to avoid damaging the coating during mixing, use a “low-shear” impeller (with blunted blade edges), reduce the speed to 15-18 rpm, and control the mixing time to ≤8 minutes. This prevents the slow-release agent particles from excessively colliding and causing the coating to crack, thereby losing its slow-release effect.
For trace elements, they should first be crushed to a size of 100 mesh or larger, pre-diluted with five times the amount of powdered fertilizer (such as monoammonium phosphate powder), and then added to the BB fertilizer blender using a “multi-point feeding” method to ensure even distribution of the trace elements and avoid localized high concentrations that could cause fertilizer damage to the crop.

Optimizing the linkage between the ring die granulator and front-end raw material processing

fertilizer granulator Sep 29, 2025

The granulation performance of a ring die granulator isn’t solely determined by the equipment itself. Linkage optimization with the front-end crushing, mixing, and conditioning processes can significantly improve production efficiency and pellet quality.
During the crushing process, the raw material particle size must be matched to the ring die aperture. For an 8mm ring die aperture, the raw material particle size should be controlled below 2mm, with a particle size deviation of no more than 0.5mm, to prevent large particles from clogging the die aperture. A grading screen can be installed at the pulverizer outlet, with the screen aperture set to 1/4 the ring die aperture, to ensure uniform particle size and reduce the frequency of granulator downtime for cleaning. If the raw material contains a high amount of coarse fiber (such as straw powder), the pulverizer should use a hammer-type mechanism to enhance crushing efficiency.

The mixing process must ensure uniformity among the raw materials, binders, and nutrients. Uneven mixing can result in insufficient nutrients or insufficient strength in some pellets. A typical requirement for uniformity is a coefficient of variation of ≤7%. This can be achieved by adjusting the mixer speed (30-40 rpm) and mixing time (5-8 minutes). Sampling points should be set up at the fertilizer mixer outlet for hourly testing.
During the conditioning process, the steam supply should be adjusted according to the production speed of the ring die granulator. For example, if the pelletizer processes 5 tons of raw materials per hour, the steam supply should be maintained at a stable 0.3-0.4 tons/hour, monitored in real time by a flow meter. If the pelletizer speed is increased to 6 tons/hour, the steam supply should be increased to 0.45-0.5 tons/hour to prevent the raw materials from being too dry or too wet.
By coordinating the speed and flow of the front-end and pelletizer, production efficiency can be increased by 10%-15%, reducing downtime caused by process disconnects.

How do fertilizer coating machines solve the problem of pellet clumping?

fertilizer granulator Sep 28, 2025

Fertilizer pellets are prone to clumping during storage and transportation. Through scientific design, coating machines address this issue at its root, focusing on the following key aspects.
First, uniform film coating and protection. The coating machine uses vibrating feeders, combined with guide plates, to evenly distribute pellets. Even pellets of varying sizes are diverted by the guide plates, ensuring that every pellet contacts the film. The symmetrical film guide mechanism wraps the pellets from all sides, creating a complete seal that blocks moisture from reaching the pellets and prevents moisture absorption and clumping. Furthermore, the film tension is precisely controlled, with an error within ±2N. This prevents over-tightening of the pellets, keeping them loose and facilitating even spreading during subsequent fertilization.

Second, precise temperature control is crucial. During the heat-sealing stage, the coating machine uses an intelligent thermostat to maintain a stable temperature of 100-150°C and monitors temperature fluctuations in real time, with fluctuations within ±5°C. This ensures that the film adheres tightly to the pellets, forming a strong protective layer. It also prevents high temperatures from damaging anti-caking components in the fertilizer (such as the coating agents in some slow-release fertilizers), preserving the pellets’ inherent anti-caking properties. The hot air circulation design also ensures a uniform temperature throughout the packaging, preventing uneven shrinkage of the film and damaging the protective layer. Even the slightest movement of the pellets within the package prevents the film from rupturing.

Drum fertilizer coolers offer a variety of applications

fertilizer granulator Sep 26, 2025

Drum fertilizer coolers, with their high efficiency and adaptability, have been widely used in various industrial fields, becoming a powerful cooling tool for material handling.
In the chemical industry, drum fertilizer coolers are crucial equipment for fertilizer and pigment production. For example, the temperature of granular compound fertilizer can reach 80-120°C immediately after pelleting. If directly packaged, it can easily clump, affecting product quality. Using a drum fertilizer cooler, the material temperature can be reduced to 30-40°C, preventing caking and reducing moisture absorption, extending storage life. For heat-sensitive pigments, the drum fertilizer cooler’s indirect cooling methods (such as jacket cooling) prevent discoloration caused by sudden temperature drops, ensuring stable product color.

In the grain processing and feed industries, drum fertilizer coolers solve the cooling challenges of pelleted feed and grain. Pelletized feed is hot after pressing, and direct storage can easily breed microorganisms and cause mold. A drum fertilizer cooler can reduce the feed temperature from over 60°C to near room temperature in 10-15 minutes, while also removing some moisture and extending the shelf life of the feed. For grains such as corn and wheat, if the moisture content is high after harvest, a drum fertilizer cooler can be used in conjunction with drying equipment to cool them down first and then dry them, reducing drying energy consumption.

Benefits of Using a Disc Granulator in Organic Fertilizer Production Lines

fertilizer granulator Sep 11, 2025

Among the core equipment in organic fertilizer production lines, disc granulators are the preferred choice for many companies, especially small and medium-sized production lines, due to their strong adaptability, high-quality granulation, and convenient operation. They significantly improve production efficiency and product quality.

The disc granulator‘s most prominent advantage is its excellent granulation performance. Its unique disc structure uses the synergistic effect of centrifugal force and gravity to create a stable “rolling granulation zone” within the disc, achieving a granulation rate exceeding 90%, far exceeding that of some extrusion granulation equipment. The resulting granules are not only highly rounded and smooth, but also uniform in size (typically controlled within 2-5mm). This not only prevents nutrient loss due to granule breakage during transportation, but also meets the granule shape requirements of mechanized fertilization, significantly enhancing product market acceptance.

Secondly, it offers excellent raw material compatibility. Organic fertilizer raw materials come from a wide range of sources, from decomposed chicken manure and cow dung to straw powder and mushroom residue, with widely varying composition. The disc granulator can easily adapt to different raw material characteristics by adjusting the disc inclination angle (45°-55°), rotation speed (15-20 rpm), and feed rate.

Disc granulators also offer significant advantages in terms of operation and cost. The device boasts a simple structure, with the disc and drive system as its core components. Routine maintenance requires only regular inspections of bearing wear and disc flatness, resulting in maintenance costs approximately 30% lower than those of a drum granulator. Furthermore, its energy consumption is low, with a single unit consuming approximately 5-10 kWh per hour. This makes it suitable for the production needs of small and medium-sized production lines (with a single unit capable of flexibly adjusting daily output to 5-20 tons). The investment threshold is significantly lower than that of large-scale drum granulation equipment, enabling companies to quickly achieve operational and profitability.

Disc granulators also align with green production trends. Their enclosed design reduces dust emission from raw materials, and combined with a spray moisturizing system, they effectively control dust pollution during the production process. Some units can also be integrated into the production line’s waste heat recovery system, further reducing energy consumption. For organic fertilizer production companies that pursue high efficiency, economy and environmental protection, disc granulator is undoubtedly the ideal choice to balance quality and cost.

How does a rotary drum granulator work in an organic fertilizer production line?

fertilizer granulator Sep 10, 2025

In an organic fertilizer production line, a rotary drum granulator is the core equipment for converting powder into granules. Its operating principles revolve around material agglomeration and granulation. Through a combination of physical and mechanical processes, it transforms fermented organic raw materials into granular products that are easy to store, transport, and apply.

After the equipment is started, fermented and pulverized organic materials (such as decomposed cow dung and straw powder) are introduced into the inclined drum of the rotary drum granulator along with an appropriate amount of binder (usually water or starch solution). The drum rotates at a constant speed of 10-15 revolutions per minute. Lifting plates on the inner wall of the drum continuously scoop up and drop the material, creating continuous agitation and mixing. During this process, the binder moistens the surface of the raw material particles, forming a sticky interface and paving the way for particle agglomeration.

As the drum rotates continuously, the material gradually forms tiny “master particles” under the combined effects of gravity, centrifugal force, and friction. These masterbatch particles continuously roll within the drum, attracting surrounding powdered raw materials like a snowball, gradually increasing in size. Furthermore, the drum’s tilt angle (typically 3-5°) ensures that the material moves slowly toward the discharge end, preventing accumulation within the drum and ensuring that each particle is evenly stressed and grows.

To ensure pellet quality, the drum granulator also uses a temperature control system to regulate the drum temperature (typically between 40-60°C). This prevents excessive moisture content from causing pellet adhesion, while also preventing low moisture content from affecting agglomeration. When the pellets reach the preset size (typically 2-5mm, controlled by adjusting the drum speed and residence time), they are discharged from the discharge end and enter the subsequent drying and cooling processes.

Compared with other granulation equipment, the advantages of the rotary drum granulator are large processing capacity (a single device can produce 50-200 tons of fertilizer per day), high particle strength (compressive strength can reach 15-30N), and strong adaptability to raw materials. Whether it is poultry and livestock manure, straw or mushroom residue, it can be granulated stably. It is an indispensable key equipment in large and medium-sized organic fertilizer production lines.