FERTILISER APPLICATION

High-frequency vibrating screens are recommended for final sizing and classification of NPK and DAP fertilizer granules due to their superior separation efficiency, compact design, and operational reliability under moist and abrasive conditions.

High-frequency screens operate at high vibration frequencies with low amplitude, enabling:

• Sharp separation between undersize, product, and oversize granules
   
• Stable cut size control in the typical 2–4 mm / 2–5 mm fertilizer range
   
• Minimal near-size contamination
   

This is critical for meeting product size specifications and downstream blending requirements.

NPK and DAP granules often contain:

• Residual surface moisture
   
• Coating agents (oil, wax, anti-caking additives)
   

High-frequency excitation prevents:

• Screen blinding
   
• Pegging of apertures
   
• Loss of effective screening area
   

Ensuring consistent performance across varying operating conditions.

Compared to conventional low-frequency or rotary screens, high-frequency screens:

• Impart lower impact forces
   
• Reduce granule attrition and breakage
   

Resulting in:

• Lower dust load in the plant
   
• Reduced fines recycle
   
• Improved environmental and safety compliance
   

Accurate size classification reduces:

• Return of near-size material to granulator
   
• Internal circulation ratio
   

This improves:

• Granulator stability
   
• Energy efficiency
   
• Overall plant throughput
   

High-frequency screens provide:

• Higher capacity per unit screening area
   
• Lower dynamic loads transferred to structure
   

This makes them particularly suitable for:

• Brownfield revamp projects
   
• Space-constrained fertilizer plants
   
• Elevated installations over conveyors or bins
   

Due to efficient screening mechanics and lower mass movement:

• Power consumption per ton is reduced
   
• Fewer moving components result in lower maintenance
   

Supporting lower OPEX over plant life cycle.

High-frequency screens offer:

• Modular design
   
• Standardized deck configurations
   
• Easy integration with granulators, dryers, coolers, and coating drums
   

This simplifies:

• Engineering design
   
• Procurement
   
• Installation and commissioning
   

For NPK and DAP fertilizer plants, high-frequency screens provide a technically superior and economically justified solution for final granule classification, ensuring:

• Consistent product quality
   
• Stable plant operation
   
• Lower recycle load
   
• Reduced operating cost
   

Hence, high-frequency screens are recommended as the preferred screening equipment for modern NPK and DAP fertilizer processing facilities.