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Lime Kilns
For Wikipedia entry for Lime Kilns see Link
A lime kiln is a kiln used for the calcination of limestone (calcium carbonate) to produce the form of lime called quicklime (calcium oxide). The chemical equation for this reaction is: CaCO3 + heat → CaO + CO2
This reaction can take place at anywhere above 840 °C (1,540 °F), but is generally considered to occur at 900 °C (1,650 °F) (at which temperature the partial pressure of CO2 is 1 atmosphere), but a temperature around 1,000 °C (1,830 °F) (at which temperature the partial pressure of CO2 is 3.8 atmospheres) is usually used to make the reaction proceed quickly. Excessive temperature is avoided because it produces unreactive, "dead-burned" lime.
Slaked lime (calcium hydroxide) can be formed by mixing quicklime with water.
This extract uses material from the Wikipedia article "Lime_kiln", which is released under the Creative Commons Attribution-Share-Alike License 3.0.
by Mick Garratt
Created: Sat, 27 Feb 2010, Updated: Sat, 27 Feb 2010
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