The NPK blending fertilizer production line is a key process in modern compound fertilizer manufacturing. The choice of raw materials directly affects fertilizer quality and production efficiency.

1.Basic Single-Nutrient Fertilizer Sources
The three main raw materials for NPK blending fertilizer production line are:
Nitrogen (N) sources: Urea, Ammonium Sulfate, Ammonium Nitrate, Ammonium Chloride, etc.
Phosphorus (P) sources: Single Superphosphate (SSP), Triple Superphosphate (TSP), Monoammonium Phosphate (MAP), Diammonium Phosphate (DAP), etc.
Potassium (K) sources: Potassium Chloride (MOP), Potassium Sulfate (SOP), Potassium Nitrate, etc.
2.Organic-Inorganic Composite Materials
Environmentally friendly blends often add: Humic substances, Bio-organic fertilizers, Seaweed extracts, Fermented livestock or poultry manure.

3.Functional Additives
Special formulas may include:
Slow-release agents (like sulfur coating, polymer coating)
Anti-caking agents (like diatomaceous earth, talc powder)
Soil conditioners (like humic acid, biochar)
Microbial inoculants (like nitrogen-fixing bacteria, phosphate-solubilizing bacteria)
4.Raw Material Selection and Mixing Ratio Principles
Physical properties should match: The particle size and density of different materials should be similar (it is recommended to use 2-4mm granules).
Chemical compatibility: Avoid direct mixing of ammonium nitrogen sources with alkaline substances.
Cost optimization: Choose the most cost-effective combination based on local raw material prices.

Through scientific selection of raw material sources and optimized mixing ratios, NPK blending fertilizer production lines can produce high-quality fertilizers that are nutrient-balanced, cost-effective, and tailored to meet the diverse needs of modern agriculture.