How to Choose Among the Three NPK Processes? A Comparison Guide to Blending, Wet Granulation, and Dry Granulation
Choosing an NPK production process essentially involves a trade-off between three routes: bulk blending, wet granulation, and dry granulation. Bulk blending has the lowest investment and flexible formulation, but particle uniformity depends on the raw materials. Wet granulation produces well-spherically shaped particles and is suitable for large-scale continuous production lines. Dry extrusion eliminates the drying process, but produces irregularly shaped particles, making it suitable for energy-sensitive applications. There is no absolute superiority or inferiority among the three routes; the key factors are investment budget, product positioning, and raw material availability.
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