Article
Article
Prilling
Article By:
Huffman, E. O. Consultant in Fertilizer Research and Development, Florence, Alabama.
Last reviewed:January 2020
DOI:https://doi.org/10.1036/1097-8542.544300
Solidification of droplets of molten material free-falling against an upward stream of air in a tower. It is a process used extensively in nitrogen fertilizer manufacturing. Melt is dispersed in the top of the tower at a temperature just above the solidification point of the material being processed. The dispersion arrangement, air flow, tower dimensions, and feed material are selected so the droplets approach a spherical shape and solidify before reaching the bottom of the tower.
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