Limestone

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White limestone sedimentary rock composed mainly of calcium carbonate. Limestone at its origin may be hemogenni (utaeni chemically), biogenic (mostly built from the remains of organisms - phyto and zooplankton, shells, skeletal particles, etc.). Klastichni and (preotlozheni made of pieces of limestone).

Limestone is one of the most widely used in construction rocks. Except in the natural, limestone is used for industrial production of caustic lime, carbon dioxide, soda calcification. Added in the production of iron ore by acid.

Water with high content of limestone (such as in northeastern Bulgaria) are called hard. In such heating water to temperatures above 50 ° C, limestone vodonoseshtite be postponed in parts. These deposits are known as "scale or incrustation. This leads to wear, narrowing the gap flows and their closure. If not used for drinking purposes, water may be treated with agents to lower the content of CaCO3.

 
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