History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c29.s2.t4.11

v1.c29.s2.t4.11

Lime kiln for manufacturing Lime : Kilns were rudely constructed of stone blocks and usually located in a cavity. In charging the kiln large pieces of limestones were formed into a dome like arch with large open joints and kiln was filled with fragments of lime stones. The larger pieces of lime stone were placed above the arch and kiln was topped with fragments of small size. Kiln was charged with alternate layer of lime stone and fuel (wood). Bright heat was maintained for three or four days at a temperature of about 95°C, lime stone, kankar modules, sea shells are converted into quick lime (CaO) and CO2 gas is evolved. Before using it is slaked by mixing it with mater and slaked lime is mixed with sand or bajari for masonry work.