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For other uses, see Prill (surname) and Prill School.
A prill is a small aggregate or globule of a material, most often a dry sphere, formed from a melted liquid. Prilled is a term used in mining and manufacturing to refer to a product that has been pelletized. The pellets are a neater, simpler form for handling, with reduced dust.
The material to be prilled must be in a solid state at room temperature and a low-viscosity liquid when melted. Prills are formed by allowing drops of the melted prill substance to congeal or freeze in mid-air after being dripped from the top of a tall prilling tower. Certain agrochemicals such as urea are often supplied in prilled form. Fertilizers (ammonium nitrate, urea, NPK fertilizer) and some detergent powders are commonly manufactured as prills.[1]
Melted material may also be atomized and then allowed to form smaller prills that are useful in cosmetics, food, and animal feed.
See also
- Shot (pellet)
References
- ^ Vasant Gowariker, V. N. Krishnamurthy, Sudha Gowariker, Manik Dhanorkar, Kalyani Paranjape (2009). The Fertilizer Encyclopedia. John Wiley & Sons. ISBN 9780470410349. doi:10.1002/9780470431771.
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