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Calcination: Difference between revisions - Wikipedia

Calcination: Difference between revisions

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{{confused|Calcification}}
'''Calcination''' refers to heating ([[thermal treatment|heating]] of) a solid chemical compound (e.g. [[carbonate]] [[Ore|ores]]) to high temperatures while staying below its melting point, in absence or limited supply of air or [[oxygen]] (O<sub>2</sub>), generally for the purpose of removing impurities or [[Volatiles|volatile]] substances and/or to incur [[thermal decomposition]].<ref>{{cite book|last=IUPAC|title=The IUPAC Compendium of Chemical Terminology|chapter=Calcination|year=2014|doi=10.1351/goldbook.C00773|chapter-url=http://goldbook.iupac.org/C00773.html}}</ref>
 
The root of the word calcination refers to its most prominent use, which is to remove carbon from [[limestone]] through [[combustion]] to yield [[calcium oxide|calcium oxide (quicklime)]]. This calcination reaction is CaCO<sub>3</sub>(s) → CaO(s) + CO<sub>2</sub>(g). Calcium oxide is a crucial ingredient in modern [[cement]], and is also used as a chemical [[Flux (metallurgy)|flux]] in [[smelting]]. Industrial calcination generally emits [[carbon dioxide]] ({{CO2}}), making it a major contributor to [[climate change]].