A lime kiln is a kiln used for the calcination of limestone (calcium carbonate) to produce quicklime (calcium oxide). The process of calcination is carried out in a lime kiln at high temperatures, typically above 900°C.
PROCESS OF LIME KILN
Preheating
Limestone is heated in a preheating chamber to a temperature of around 800°C. This removes any moisture or impurities that may be present in the limestone.
Calcination
The preheated limestone is fed into the lime kiln where it is heated to a temperature of around 1200-1300°C. At this temperature, the limestone breaks down into calcium oxide and carbon dioxide. The carbon dioxide is released into the atmosphere as a gas, while the calcium oxide, or quicklime, is collected at the bottom of the kiln.
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