METHOD OF PRODUCTION OF GRANULATED CARBAMIDE AND GRANULATION TOWER FOR REALIZATION OF THIS METHOD Russian patent published in 2006 - IPC C05C9/00 B01J2/04 B01J2/28 

FIELD: manufacture of fertilizers; equipment for production of granulated carbamide.

SUBSTANCE: proposed method of production of granulated carbamide includes spraying its melt in granulation zone at contact with cooling air flow, hardening of drops of melt in free fall, treatment of granules with modifying agent- mixture of surfactant with film-forming agent in aqueous medium in the course of free fall at temperature of from 80 to 110°C and cooling of granules thus formed. Mixture is used in the amount of 0.01-0.16% of carbamide mass in terms of dry residual. Use may be made of ionogenic and nonionogenic agents. Film-forming agent may be selected from group containing amino-formaldehyde and epoxy resins, polyvinyl acetate and animal glues. Granulation tower has hollow housing with melt sprayer in upper part and apparatus for cooling the granules in fluidized layer in lower part, as well as injectors for spraying modifying agent which are located over circumference in lower part of tower above cooling apparatus.

EFFECT: enhanced strength of granules.

3 cl, 1 dwg, 10 ex