Compound Fertilizer Production Line

Fertilizer granulation solution for NPK compound fertilizers

Compound Fertilizer Production Line

Fertilizer granulation solution for NPK compound fertilizers

The wet granulation process is used for the production of NPK compound fertilizers. It starts with raw materials such as urea, ammonium nitrate, ammonium chloride, ammonium sulfate, phosphate (MAP, DAP), superphosphate, and potassium chloride (or potassium sulfate). These materials are crushed to a specific fineness and then undergo granulation in a rotary drum granulator (or disc granulator). During this process, the materials are moistened and heated to form granules. In some cases, small amounts of phosphoric acid and ammonia are added to the granulator to improve granulation conditions. The resulting granules are then dried, screened, and cooled to produce the final NPK compound fertilizer product.

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Process Features

The wet granulation process uses widely available and easily sourced raw materials. It is a simple and cost-effective process, requiring low investment and offering flexible production.
Adjusting the nutrient content of the final product is easy and versatile, making the process adaptable to different fertilizer formulations.
The process relies on solid raw materials, making it less dependent on specific raw material supplies.
As a secondary processing method for base fertilizers, it results in minimal environmental impact.

Factors that Affect the Fertilizer Granulation Process

Several factors influence the quality and efficiency of the granulation process for compound fertilizers. These include the production technology, equipment used, the physical and chemical properties of raw materials and additives, the production formula, as well as operational conditions such as the temperature and airflow in the dryer, the material temperature, liquid phase, material flow rate, return material ratio, operator skills, and even climatic conditions. Considering all these elements is essential to achieving high-quality, efficient production.

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