NPK Fertilizer Production Technology

NPK fertilizer production technology is key adoption in our productions lines for quality compound fertilizer production. For example, we possess 3 techniques respectively in NPK fertilizer blending line, wet granulation line and dry granulation line, from crushing to bagging. Additionally, they effectively make compound NPKs with two or more nutrients. Meanwhile, with superior workmanship and extensive expertise our industrial technologies can increase production efficiency, whether in NPK fertilizer plants or for farms.

NPK Fertilizer Formula Ratio

Type 1: NPK Blended Fertilizer Process for Compound Fertilizer Plant Design

Primarily, NPK blended fertilizer production line is a set of equipment and processes for BB fertilizer manufacturing. Besides, it usually includes crushing, batching, mixing and packaging steps.

Then, by exact batching and blending several single element fertilizer or compound fertilizer in a certain proportion, you can get fertilizers with balanced nutrients.

Type 2: Dry Granulation Technique for NPK Fertilizer Manufacturing

Typically, dry granulation technology for NPK fertilizer production applies the extrusion method to make solid or powder materials agglomerate by external pressure. Besides, double roller extrusion is the most common method of producing NPK compounds.

And the entire dry granulation process also contains crushing, mixing, batching, and packing steps.

Type 3: Wet Granulation Technology for NPK Fertilizer Processing

As a matter of fact, wet granulation for NPK fertilizer manufacturing utilize the agglomeration method to make powdered materials squeezed into balls. Furthermore, this process needs by means of certain liquid phase (water, steam and binders). Hence, our plant develops two types of granulation: rotary drum granulation and disc granulation.

Besides, after drying, cooling, screening and packing processes, you can obtain NPK compound fertilizer products.

Top 3 Crushing Techniques in NPK Fertilizer Production

In NPK fertilizer production, crushing is an important process to break compound NPKs into smaller particles for better mixing and granulation. Thus, there are three common crushing techniques, which are urea grinding, cage grinding and chain grinding technology.

These crushing techniques have a significant impact on breaking down raw materials into the desired particle sizes for further processing in NPK fertilizer production.

For the selection of a specific crushing method in NPK fertilizer processing, you can contact with our engineers!

Top 2 Batching Techniques for NPK Compounds Processing

When it comes to the batching technology in NPK fertilizer production, our company has designed dynamic and static batching machines to ensure that the ingredient-mixing process has an error of less than 0.01. Besides, both of these machines have unique characteristics and applicability.

For one thing, dynamic batching machine can adjust the proportion of various NPK components in real-time according to the flexible formulas. In addition, using precise weighing device and advanced control system, this machine can quickly and accurately complete the batching process. Hence, dynamic batching is suitable for continuous large-scale NPK fertilizer production, and the batching process cannot be interrupted.

Automatic Batching Machine in NPK Fertilizer Production
Batching Machine for Compound Fertilizer Production

For another thing, static batching machine uses pre-set proportions to dispense various NPK components during operation, ensuring the accuracy and uniformity of formulas. Also, the operation of static batching machines is so stable that usually suitable for batch production. Because the formula is relatively fixed and does not require dynamic adjustment during the NPK fertilizer production process.

How to Fomulate 15-15-15 NPK Compound Fertilizer?

Taking a common NPK fertilizer formula as an example. Firstly, the proportion of NPK is 15-15-15, which means that the content of 15% N, 15% P2O5 and 15% K2O. Here are some details of this formula.

  • Urea (nitrogen content 46%): Adding about 32.6%.
  • MAP (phosphorus content 61%): Adding about 24.6%.
  • Potassium sulfate (potassium content 52%): Adding about 28.8%.
  • Other fillers and trace elements: Adding about 14%.

In the actual batching process, an operator will add various raw materials to dynamic or static batching machine according to the corresponding NPK ratio of the specific formulas. Then, you can add the necessary auxiliary materials to meet the requirements of the finished fertilizers. Additionally, the advanced control system automatically calculates the amount of each NPK component and strictly monitors the ratio during the batching process. Thus, this ensures the accuracy of the NPK ratio of 15-15-15.

Of course, we will ask the customer in advance if they are considering an automatic feeding system to reduce human intervention. As a result, this high-precision batching technology makes the NPK fertilizer production process more reliable and efficient, meeting the needs of different industries, including professional users in agriculture, horticulture, and soil improvement.

How to Make The Best Ratio in NPK Fertilizer Production Process?

In most cases, NPK ratio (N:P2O5:K2O) is 1-1-1 (e.g.15:15:15 or 20:20:20) will provide all of the nutrients that all plants require for optimal growth. Besides, here are some formulas for NPK fertilizer prodution are as follows/

Full Growth

Besides, you can make the NPK mixtures ratio of 4-2-3 or 4-3-2 for full growth period of crops.


Fertilizer factory can raise phosphorus content, like 1-2-1 NPK fertilizer ratios.

Flowering & Fruiting

You can increase potassium ratios to 1-1-2, 1-2-2, or 2-1-2.

Leaf Growth

NPK fertilizer factory need to achieve 2-1-1 or 3-1-1 fertilizer ratios.

If you want to make accurate compound NPKs proportion, you need more than one high-quality batching machine. However, if raw materials contain large pieces that are difficult to handle, like DAP or other phosphorus sources, you should crush them firstly.

The adoption of NPK fertilizer production technology plays a pivotal role in your manufacturing processes for the production of high-quality compound fertilizers. Our production lines are equipped with three distinct techniques for NPK fertilizer blending, wet granulation, and dry granulation, covering the entire process from crushing to bagging. These techniques enable us to efficiently produce compound NPK fertilizers with multiple nutrients.

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