| 摘要 |
<p>The invention is directed to a process for the production of urea granules from a melt or solution of urea by spraying the urea melt or solution, which also contains as granulation additive formaldehyde, methylolureum, urea-formaldehyde precondensates, or hexamethylenetetramine, in the form of very fine droplets into a fluidized bed of urea particles, in which process the granulation additive is added prior to the granulation at such a stage, that the mixture of the said granulation additive and the urea melt or solution has a contact time of at least 20 s, but not more than 20 min.</p> |
