In the NPK fertilizer production line, raw material processing is a crucial initial step that directly affects the quality and performance of the final fertilizer. The efficient operation of this process relies on a series of sophisticated equipment, each performing its own duties and jointly laying the foundation for creating high-quality fertilizers.

Firstly, the crushing equipment for raw materials. Raw materials such as phosphate ore and potassium ore usually exist in block form, with large sizes, making it difficult to directly participate in the subsequent processing flow. Jaw crusher is a powerful assistant for processing such raw materials. It has strong crushing ability and can quickly crush large ores into smaller particles through the mutual compression between the moving jaw and the fixed jaw. Its structure is simple, sturdy and durable, and can adapt to long-term, high-intensity work, providing materials with suitable particle size ranges for subsequent processing.

After the raw materials are crushed, they need to be mixed and stirred to ensure the uniform distribution of various nutrients such as nitrogen, phosphorus, and potassium. The horizontal mixer plays an important role in this process. It has a unique helical structure, driven by the mixing shaft, the inner and outer helical belts respectively push the material to make axial and radial movements, forming complex convection and shear in the mixing drum, thus achieving rapid and sufficient mixing. Whether it is raw materials with different viscosities or various trace elements added, they can be uniformly blended in a horizontal mixer.

For some raw materials with high humidity, such as organic materials containing a certain amount of moisture, drying equipment is essential. Rotary dryer is one of the commonly used drying equipment, which uses high-temperature hot air to fully contact the material in the rotating cylinder, causing the moisture in the material to quickly evaporate. The temperature of hot air and the residence time of materials in the cylinder can be precisely controlled, which can ensure the drying effect and avoid the deterioration of raw materials or nutrient loss caused by excessive drying.

Magnetic separators and screening equipment play an important role in removing impurities from raw materials. Magnetic separators use magnetic force to adsorb magnetic impurities such as iron filings in raw materials, preventing them from entering subsequent processing stages, damaging equipment, or affecting fertilizer quality. The vibrating screen screens and grades the raw materials through different aperture screens, separating materials that do not meet the particle size requirements, or returning them to the crusher for further processing or other disposal to ensure that the particle size of the raw materials entering the next process is uniform and consistent.

In the NPK fertilizer production line, the raw material processing equipment works closely together to precisely control every step from crushing, mixing, drying to impurity removal and screening grading, providing a solid guarantee for the production of high-quality NPK fertilizers. It is an indispensable and important component of the entire production line.