What should be paid attention to during NPK fertilizer production?

As the "nutritional core" of agricultural production, the standardization of the NPK fertilizer production process directly determines product quality and effectiveness, and is also related to crop growth and soil health. The following key aspects need to be carefully controlled to ensure scientific and controllable production throughout the entire process.

Raw material selection is fundamental. Before starting the NPK fertilizer production line, a strict raw material screening mechanism must be established: high-purity industrial-grade urea should be prioritized for nitrogen sources to avoid excessive harmful components that could burn crop roots; the proportion of water-soluble phosphorus in phosphorus sources must be tested to ensure effective crop absorption efficiency; and the impurity content of potassium sources must be strictly controlled to prevent soil salinization. At the same time, precise proportions must be made according to crop needs. For example, the nitrogen, phosphorus, and potassium ratios for field fertilizers and fruit and vegetable fertilizers should have different emphases to prevent nutrient waste or crop deficiencies due to imbalances.

Process control is the core aspect. During granulation, it is crucial to maintain stable equipment speed and temperature, and precisely control the amount of binder added to prevent granules from becoming too fine and clumping, or too coarse and affecting application. For disc granulation, the disc angle must be adjusted appropriately to ensure round and uniform granules. The mixing process utilizes professional stirring equipment to guarantee sufficient mixing time, and an online monitoring system prevents localized nutrient deviations, ensuring the stability of the NPK fertilizer production process.

Quality testing must be conducted throughout the entire process. Before raw materials enter the warehouse, samples are taken from each batch to test nutrient content and purity. During production, granule strength and moisture content are monitored regularly to prevent granule breakage or moisture absorption. Before finished products leave the factory, key parameters such as total nutrients and water-soluble phosphorus are tested according to national standards; substandard products must be recycled and strictly prohibited from entering the market.

Safety and environmental protection are paramount. Dust concentration monitors are installed at the production site; when levels exceed standards, the dust removal system automatically activates to prevent explosion risks. Operators must wear professional protective equipment to prevent corrosion from chemical raw materials. In terms of environmental protection, wastewater undergoes professional treatment to meet standards before being discharged; waste residue can be recycled for use in the granulation process, and waste heat is recovered for raw material preheating, reducing energy consumption and environmental impact.

Only by implementing these precautions can high-quality and safe NPK fertilizer be produced stably, empowering both agricultural yields and ecological protection.