Selection of roller press and peripheral equipment

The selection criteria for the roller presses and peripheral equipment were discussed in Section 4.2.2.4.7. Some specific remarks relating to granulation of fertilizers will be made in the following. 

As previously mentioned,modern roller presses for application in the fertilizer industry feature special designs. Operating parameters are determined during tests with the particular formulation(s). They include specific pressing force, roller diameter, roller speed, and sheet thickness. Machine size and roller width are selected to meet capacity requirements. 

Specific pressing Water content Feed particle force (for 1.0 m ( 7o) size (mm) 

Feed temperature 70 °C Potassium nitrate Calcium nitrate Calcium cyanamide Urea 

Mixture of fertilizers containing No raw phosphate or Thomas slag 

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