Category Archive : Dry Granulation Process to Make

What Are The Key Steps in NPK Fertilizer Production Technology?

In the world of agriculture, the role of fertilizers is paramount in ensuring optimal crop growth and yield. Among these fertilizers, NPK fertilizers, which contain essential nutrients like nitrogen (N), phosphorus (P), and potassium (K), play a vital role in providing plants with the elements necessary for robust development.

Step 1: Raw Material Selection and Preparation

The journey of NPK fertilizer production begins with the careful selection of raw materials. These materials typically include sources of nitrogen, phosphorus, and potassium. Common nitrogen sources include urea or ammonium nitrate, while phosphorus may be derived from phosphate rocks. Potassium, on the other hand, is often obtained from potash. These raw materials undergo thorough testing to ensure they meet quality standards.

Once selected, the raw materials undergo preparation processes, including crushing and grinding, to achieve a consistent particle size. This step is crucial for the subsequent blending process, ensuring a homogeneous mix of nutrients in the final product.

NPK fertilizer pellet manufacturing products

NPK fertilizer pellet manufacturing products

Step 2: Blending

Blending is a pivotal step in NPK fertilizer production process, where the various raw materials are mixed in precise proportions to achieve the desired nutrient ratios. The formulation is carefully calculated based on the specific needs of different crops or target applications. Advanced technology like SX’s NPK blending fertilizer production process ensures accurate and uniform blending, guaranteeing a balanced nutrient composition in every granule of the final fertilizer product.

BB Fertilizer Blending Line

BB Fertilizer Blending Line

Step 3: Granulation

To enhance the efficiency of NPK fertilizers and facilitate ease of application, granulation is a key step. Granulation involves forming small granules from the blended materials to provide controlled nutrient release and prevent nutrient leaching. So you can choose techniques such as drum granulation, pan granulation, or extrusion granulation to achieve the desired granule size, density, and mechanical strength.

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NPK Fertilizer Granulation Production Line of Extrusion Technique

NPK Fertilizer Granulation Production Line of Extrusion Technique

Step 4: Drying & Cooling

After granulation, the newly formed fertilizer granules undergo a drying process to remove excess moisture. Proper drying is crucial to prevent caking and improve the shelf life of the fertilizer. Various drying methods, including Shunxin’s rotary dryers, are employed to achieve optimal moisture content.

To prevent granules from clumping and improve their appearance, a cooling process is implemented after drying. This aids in stabilizing the granules and increases their resistance to breakage during storage and transportation.

Drying Machine on The Market

Drying Machine on The Market

Step 5: Screening & Coating

To enhance the quality and appearance of the final product, the fertilizer granules undergo screening to remove any oversize or undersize particles. Additionally, coating may be applied to the granules to enhance their nutrient release properties or add specific additives for targeted functionality. SX rotary screening machine and coating machine can help you achieve good effect.

Step 6: Packaging and Quality Control

The final step in NPK fertilizer production technique is packaging and quality control. The finished fertilizer is carefully packaged into bags, bins, or bulk containers, ensuring proper labeling and identification. Meanwhile, Shunxin has automatic bagging production line can help you do filling, sewing, weighing, and other works. Stringent quality control measures are put in place to verify the nutrient content, granule size, and overall product integrity. This step ensures that farmers and consumers receive fertilizers that meet regulatory standards and deliver optimal results.


NPK fertilizer production technology encompasses a series of intricate steps that aim to provide essential nutrients to plants, maximize agricultural productivity, and promote sustainable farming practices. From raw material selection and preparation to granulation, drying, and coating, each stage plays a vital role in creating effective and efficient NPK fertilizers. You can visit this website: for more details.


How to Make Feed Pellets for Large Scale Capacity?

Subtitle 1: Introduction to Feed Pellet Production

In today’s rapidly growing agricultural industry, efficient and effective feed production is essential to meet the demands of large-scale livestock farming. Feed pellets have emerged as a popular choice due to their uniformity, nutritional value, and ease of storage. This guide will walk you through the step-by-step process of producing high-quality feed pellets on a large scale.

feed pellet mill

feed pellet mill

Subtitle 2: Raw Material Selection and Preparation

The foundation of superior feed pellets lies in selecting the right raw materials. Start by sourcing high-quality grains, protein sources, vitamins, and minerals. Properly storing and handling these materials is crucial to prevent contamination and preserve their nutritional value. Cleaning, grinding, and mixing the raw ingredients ensure a consistent blend that translates to uniform pellet quality.

Subtitle 3: The Pelletization Process

  1. Grinding and Mixing: Begin by grinding the raw materials into a consistent particle size. This enhances digestibility and nutrient absorption. Next, thoroughly mix the ground ingredients using a batch mixer or continuous mixer, ensuring an even distribution of nutrients.
  2. Conditioning: Before pelletization, the mixed materials need conditioning to achieve the right moisture content and temperature. This step enhances pellet durability and reduces the risk of heat damage during the pelletization process.
  3. Pelletizing: The conditioned mixture is fed into a pellet mill, where it undergoes compression and extrusion through die holes to form cylindrical pellets. The combination of heat, pressure, and friction activates the natural binders present in the feed, creating cohesive pellets.

Subtitle 4: Pellet Quality Enhancement

  1. Cooling: As the freshly extruded pellets leave the pellet mill, they are hot and soft. Cooling the pellets with ambient air or a specialized cooling system is vital to strengthen their structure and prevent deformation during handling and storage.
  2. Screening and Grading: After cooling, the pellets are screened to remove fines and ensure uniform size distribution. Proper screening improves feed flow, prevents blockages, and allows for precise feeding.
  3. Coating and Enrichment: Some feed formulations may benefit from additional coatings or enrichment processes. Coatings can include fat, oil, or flavor enhancers, while enrichment involves adding vitamins, minerals, or additives to enhance the nutritional profile.

Subtitle 5: Packaging and Storage

Once the feed pellets meet the desired quality standards, they are ready for packaging granules. Choose durable, airtight bags or containers to maintain pellet freshness and prevent contamination. Proper storage conditions, including temperature and humidity control, are essential to extend shelf life and preserve nutritional value.

Subtitle 6: Maintenance and Optimization

To ensure consistent pellet quality and maximize production efficiency, regular maintenance of equipment is crucial. This includes cleaning, lubrication, and routine inspections. Periodic adjustments to the pellet mill and other machinery may be necessary to optimize performance and pellet quality.

Subtitle 7: Conclusion

Producing feed pellets for large-scale capacity requires careful planning, precise execution, and a deep understanding of the pelletization process. By selecting quality raw materials, mastering the pelletization techniques, and implementing proper quality control measures, you can achieve feed pellets that meet the nutritional needs of your livestock while maintaining production efficiency and profitability.

How to Make Granules in Double Roller Granulator with Dry Granulation?

Dry granulation is a widely used technique in the pharmaceutical, chemical, and fertilizer industries to convert powdered materials into granules without the use of liquids or solvents. One of the most efficient and popular machines for dry granulation is the Double Roller Granulator (DRG). This versatile equipment is designed to transform powders into uniform granules through a two-step process that involves compression and size reduction. In this guide, we will walk you through the steps to make granules using a Double Roller Granulator with dry granulation.

skin for double roller granulator

skin for double roller granulator

Step 1: Selection of Raw Materials

Before starting the granulation process, it is essential to choose the appropriate raw materials. The choice of materials will directly impact the quality and characteristics of the final granules. Typically, the raw materials consist of a combination of active pharmaceutical ingredients (APIs), excipients, or chemical components for fertilizers. Ensuring the materials are in powder form is crucial for the dry granulation process.

Step 2: Pre-processing of Raw Materials

If the raw materials are not in a suitable powdered form, pre-processing steps such as milling or crushing may be required. Milling reduces the particle size and ensures a more uniform distribution, enhancing the granulation efficiency. However, it is essential to monitor the particle size distribution and avoid over-milling, as it can affect the flow and compaction properties of the powder.

Step 3: Adjusting the Double Roller Granulator Parameters

The next step involves setting up the Double Roller Granulator to achieve the desired granule characteristics. The key parameters to be adjusted are the roller gap, roll speed, and compaction pressure. The roller gap determines the thickness of the granules, while the roll speed affects the residence time of the materials in the machine. The compaction pressure influences the density and hardness of the granules. Proper adjustment of these parameters is crucial for obtaining granules of consistent quality and size.

Step 4: Feeding the Raw Materials into the Double Roller Granulator

Once the granulator is properly set up, the pre-processed powders are fed into the hopper of the Double Roller Granulator. The gravity feeding system allows a steady flow of materials into the compression zone between the two counter-rotating rollers. Click here to get more details.

Step 5: Compaction and Size Reduction

As the powders pass through the compression zone, the rollers apply high pressure to compact the materials. The mechanical force exerted by the rollers causes the powders to adhere together, forming large agglomerates. These agglomerates are then broken down into smaller granules by the action of the milling screen located beneath the rollers. The size of the milling screen determines the final granule size, and it can be easily replaced to achieve different granule sizes.

Step 6: Sieving and Final Product Collection

After the granulation process, the granules are separated from any remaining fine particles and oversize agglomerates by sieving. The sieve ensures the granules are of uniform size and free from any impurities. The final granules are then collected and stored in appropriate containers or packaging for further use.


Dry granulation using a Double Roller Granulator is a reliable and efficient method for converting powdered materials into uniform granules. By following the steps outlined in this guide, you can produce high-quality granules with the desired size and characteristics. Proper selection of raw materials, adjusting granulator parameters, and careful handling during the process are crucial to achieving successful dry granulation. Whether in pharmaceuticals, chemicals, or fertilizers, the Double Roller Granulator offers an excellent solution for granule production through dry granulation. If you are interested in it ,you can visit