prilling

• Rhymes: -ɪlɪŋ

prilling (uncountable)

1. The solidification of droplets of molten material falling against an upward stream of air; used especially to agglomerate ammonium nitrate and urea for use as a fertilizer.
   • 2005, Douglas K. Louie, Handbook of Sulfuric Acid Manufacturing, pages 5–11:

     In air prilling, molten sulphur is sprayed from the top of a tower against an upward flow of air. As the sulphur falls, the sulphur droplets break into small droplets and cools into prills.

• prill
• prilling tower