Large-scale production of compound fertilizers

Drum pelletizing is the fundamental process for large-scale production of compound fertilizers. Its advantages in terms of process characteristics, equipment selection and production optimization are described below. It has significant advantages, such as high throughput, uniform particles and high pelletizing rate, and is ideal for large-scale continuous drum pelletizing in compound fertilizer production.Click for more information.

Advantages of the drum pelletizing process

Drum granulation mixes powdered raw materials with binders and granulates them by the mechanical action of a rotating drum. Its main advantages include:

Large continuous production capacity: The drum granulator can operate continuously for 24 hours, and the capacity of each machine can reach 10 to 50 t/h, which is ideal for large-scale production of compound fertilizer.

High roundness: Due to the rotary friction and impact of the particles, their surface is smooth and their resistance is high, which reduces the pulverization rate in the subsequent classification process.

Wide formula: The proportion of raw materials (such as nitrogen, phosphorus and potassium) can be flexibly adjusted, which is suitable for various types of compound fertilizers, such as high nitrogen fertilizers, sulfur-based fertilizers and chlorine-based fertilizers.

Optimization of thermal efficiency: By combining the above two equipment, the machine and the cooler for the process period, the integration of granulation, drying and cooling is achieved, reducing the system and improving production efficiency.

• Drum Granulator

The main equipment is the inclined drum granulator. The inclination of the frame (generally 2° to 5°) and the installation must be adjusted according to the characteristics of the order to ensure that the particles form a virtuous cycle of “rolling-binding-compaction” in the store.

• Installation system

Raw material molding: Powdered raw material must pass through crushers and screens to ensure uniform particle size and avoid agglomeration during granulation.

Improved ball formation rate.

Drying and cooling: After granulation, the particles are preprocessed by a rotary pre-machine and then pass through a fluidized bed cooler to the next stage to ensure particle strength.

Production optimization

• Moisture content control: The moisture content of the raw material mixture is controlled between 3% and 5%, and the granulation stage is adjusted between 8% and 12% by spraying to avoid excessive particle adhesion.
• Screening and utilization of return material: A vibrating screen is used to separate suitable particles. Fine dust and particles re-enter the granulator through the return system to reduce the accumulation of raw material residue.
• Tail gas treatment: A cyclone dust collector and washing tower are installed to reduce ammonia emissions and meet environmental protection requirements.

Industrial application of drum granulation
This process is especially suitable for the production of high concentration compound fertilizers (such as 15-15-15, 17-17-17 and other formulations). The compressive strength of the particles can exceed 20 N, which meets the needs of long-distance transportation and mechanized fertilization. At the same time, the addition of anti-caking agents or coating oils can further improve product stability during storage.

Drum pelletizing has become the process of choice for large-scale production of compound fertilizers due to its high efficiency, stability and low consumption. Companies can achieve improvements in product quality and production capacity by optimizing equipment parameters and improving support systems.

Since its establishment in 2015, Fude Machinery has been committed to providing high-quality and high-performance wood equipment solutions to global customers. With advanced production technology, strict quality control, and continuous innovative research and development capabilities, we have received customer satisfaction praise.

The production equipment includes: fermentation rake, dryer, granulator, crusher, mixer, round throwing machine, organic fertilizer production line, etc. The company will continue to adhere to the business philosophy of “quality first, customer first” and provide higher quality organic fertilizer equipment solutions for global customers.