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2009 Irshad Granulation of Urea in a Pan Granulator

Urea granulation is favored over prilling due to the problems associated with prilling. Tumbling agglomeration technique is employed in pan granulator. Product with wide size range can be produced by playing with only few parameters like binders (water and urea solution), ratio of binders, rpm of pan, granulation time and angle of inclination. Urea granulation is studied at laboratory scale using pan granulator. Water and urea solutions of different concentrations are employed as binder. Results reveal that concentration of urea solution is proportional to rate of granulation. A threshold quantity of binder is required for optimum granulation yield. Speed of the pan is inversely proportional to the rate of granulation. Granulation yield is also proportional to time of granulation however it becomes critical at a certain point. Angle of inclination of the pan has no significant effect on the granulation yield.

 

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