Editing Prill

{{short description|Small aggregate or globule of a material}}
{{Wiktionary}}
{{Other uses|Prill (surname)|Prill School}}
A '''prill''' is a small aggregate or globule of a material, most often a dry sphere, formed from a melted liquid through spray crystallization.<ref name="Van'T Land 117">{{cite book |last1=Van'T Land |first1=C.M. |title=Industrial Crystallization of Melts |date=2004 |publisher=Taylor & Francis |page=117 |isbn=9780203021132 |url=https://books.google.com/books?id=Xo4zhU9DbJsC&dq=prilling&pg=PA117 |access-date=10 October 2022}}</ref>

'''Prilled''' is a term used in [[mining]] and [[manufacturing]] to refer to a product that has been [[Pelletizing|pelletized]]. [[ANFO]] explosive typically comprises [[ammonium nitrate]] prills mixed with #2 [[fuel oil]].<ref name="Jimino, Jimino, & Carcedo 113">{{cite book |last1=Jimino |first1=C. Lopez |last2=Jimino |first2=E. Lopez |last3=Carcedo |first3=Ayala |title=Drilling and Blasting of Rocks |date=1995 |publisher=Taylor & Francis |isbn=9789054101994 |page=113 |url=https://books.google.com/books?id=ebNArd17TH0C&dq=prilled+aluminium+ANFO&pg=PA113 |access-date=10 October 2022}}</ref> 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 [[agrochemical]]s such as [[urea]] are often supplied in prilled form. Fertilizers (ammonium nitrate, urea, [[fertilizer|NPK fertilizer]]) and some [[detergent powder]]s are commonly manufactured as prills.<ref name=FertEncyl>Vasant Gowariker, V. N. Krishnamurthy, Sudha Gowariker, Manik Dhanorkar, Kalyani Paranjape (2009). ''The Fertilizer Encyclopedia''. John Wiley & Sons. {{ISBN|9780470410349}}. {{doi|10.1002/9780470431771}}.</ref> However prilling of ammonium nitrate and urea has in recent years been replaced by [[Granulation|fluid bed granulation]] as this gives strong and more [[Abrasion (mechanical)|abrasion]]-resistant granules.<ref name="Van'T Land 117" />

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==
<references />

[[Category:Agricultural chemicals]]
[[Category:Metallurgy]]


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