Manufacture Of Lime

Lime is manufactured by calcining natural calcium carbonate, typically hard-rock carboniferous limestone. The mineral is quarried, crushed, ground, washed and screened to the required size range. The limestone is burnt at approximately 950°C in either horizontal rotary kilns or vertical shaft kilns which drive off the carbon dioxide to produce quicklime or lump lime (calcium oxide). Quicklimes include calcium limes (CL) and dolomitic limes (DL) depending upon the composition of the starting mineral as defined by BS EN 459-1: 2001.

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