The quality of NPK blended fertilizer directly affects crop growth and farmer profits. To ensure uniform nutrient distribution, stable granules, and no caking, NPK blending fertilizer production lines must strictly follow scientific quality control methods.
1.Raw Material Quality Control
Strict raw material testing: Nitrogen fertilizers (like urea, ammonium chloride), phosphate fertilizers (like MAP, DAP), and potash fertilizers (like MOP, SOP) must meet standards. Test moisture, purity, and impurity levels.
Raw material pre-treatment: Ensure raw material particle sizes are similar (typically 1-4mm) to prevent uneven mixing due to size differences.
2.Precise Batching and Mixing Process
Dynamic weighing system: Use high-precision electronic scales to guarantee accurate ratios of N, P, K, and micronutrients.
Efficient mixing equipment: Use twin-shaft paddle mixers. Control mixing time to 5-10 minutes to ensure even nutrient distribution.
3.Granule Uniformity and Anti-Caking Treatment
Screening and Sizing: Use fertilizer screener machines to remove oversized or undersized particles, ensuring uniform finished granules (2-5mm).
Anti-caking agent coating: Spray anti-caking agents (like mineral oil or surfactants) before packaging to reduce caking during storage.
4.Storage and Transportation Management
Dry, ventilated warehousing: Control warehouse humidity (≤60%) and temperature (≤30°C) to prevent fertilizer from absorbing moisture and degrading.
Shock-proof transportation: Minimize granule breakage during long-distance transport to ensure stable quality upon delivery.
By implementing these quality control measures, NPK blending fertilizer production lines can achieve products with precise nutrients, uniform granules, and excellent anti-caking performance, meeting the needs of modern farming.