Lime (mineral)

Lime is a general term for various naturally occurring minerals and materials derived from them, in which carbonates, oxides and hydroxides of calcium predominate. It is also name for single mineral (native lime) of the CaO composition, occurring very rarely. The word 'lime' originates with its earliest use as building mortar and has the the sense of 'sticking or adhering'. []

These materials are still used in large quantities as building and engineering materials (including limestone products, concrete and mortar) and as chemical feedstocks, among other uses. Lime industries and the use of many of the resulting products date from prehistoric periods in both the Old World and the New World.

The rocks and minerals from which these materials are derived, typically limestone or chalk, are composed primarily of calcium carbonate. They may be cut, crushed or pulverized and chemically altered. "Burning" (calcination) converts them into the highly caustic material "quicklime" (calcium oxide, CaO) and, through subsequent addition of water, into the less caustic (but still strongly alkaline) "slaked lime" or "hydrated lime" (calcium hydroxide, Ca(OH)2), the process of which is called "slaking of lime".

When the term is encountered in an agricultural context, it probably refers to agricultural lime. Otherwise it most commonly means slaked lime, as the more dangerous form is usually described more specifically as quicklime or "burnt lime".

Lime production process

* Limestone is extracted from quarries or mines.
* Part of the extracted stone, selected according to its chemical composition and granulometry, is calcinated at about 1000°C in different types of kiln, fired by such fuels as natural gas, coal, fuel oil, lignite, etc.

Quicklime is produced according to the reaction: CaCO3 + heat --> CaO + CO2

* Quicklime can be hydrated, i.e. combined with water.
Hydrated lime is produced according to the reaction: CaO + H2O --> Ca(OH)2

* [ Lime production process presentation]

See also

*calcium oxide, the main component of dry mineral lime.
*calcium hydroxide, the hydrated form.
*gypsum: a similar mineral.
*sascab: a building and paving material (Central America).
*hydraulic lime


* J.A.H. Oates, Projet de. Lime and Limestone – Chemistry and Technology, Production and Uses. Wiley-VCH, ISBN 3-527-29527-5 (1998)
* [ US Geological Survey]

External links

* [ The National Lime Association (US & Canada)]
* [ Glossary by Robert W. Piwarzyk, Santa Cruz Public Libraries, Ca]

Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Lime — NOTOC Lime may refer to:Fruits*Lime (fruit), various green to yellow citrus fruits **Australian lime **Blood lime **Kaffir lime **Key lime **Persian lime **Spanish lime **Sweet lime **Wild lime *Lime tree, a common name for members of the genus… …   Wikipedia

  • Mineral Products Association — Abbreviation MPA Formation 2009 Legal status Not for profit company Purpose/focus Trade Association for the UK minerals products industry Location …   Wikipedia

  • Lime (material) — For other uses, see Lime (disambiguation). Limestone quarry in Brønnøy, Norway. Lime is a general term for calcium containing inorganic materials, in which carbonates, oxides and hydroxides predominate. Strictly speaking, lime is calcium oxide or …   Wikipedia

  • Lime-Uranite — Autunite Autunite Catégorie VIII : phosphates, arséniates, vanadates Autunite avec Uraninite Mine de Vénachat, Haute Vienne, France (11x7cm) …   Wikipédia en Français

  • Lime water — Limewater is the common name for saturated calcium hydroxide solution. It is sparsely soluble. Its chemical formula is Ca(OH)2. Since calcium hydroxide is only sparsely soluble, i.e. ca. 1.5 g per liter at 25 °C,[1] there is no visible… …   Wikipedia

  • Mineral industry of Russia — Russia is one of the world’s leading mineral producing countries and accounts for a large percentage of the CIS’s production of a range of mineral products, including metals, industrial minerals, and mineral fuels. In 2005, Russia ranked among… …   Wikipedia

  • Mineral industry of Africa — The mineral industry of Africa is one of the largest mineral industries in the world. Africa is the second biggest continent, with 30 million km² of land, which implies large quantities of resources. For many African countries, mineral… …   Wikipedia

  • mineral — 1. adj Relating to minerals or the process and business of mining; bearing or producing valuable minerals 2. noun Any valuable inert or lifeless substance formed or deposited in its present position through natural agencies alone, and which is… …   Black's law dictionary

  • Mineral spring — For various place names, see Mineral Springs (disambiguation) The Mineral Spring, etching by Wenceslas Hollar (1607 1677). The unidentified central European spring features a sunken stone basin and ornamental retaining wall …   Wikipedia

  • mineral — Synonyms and related words: alabaster, alabastrine, amphibole, antimony, apatite, aplite, arsenic, asbestine, asbestos, asphalt, azurite, bauxite, bitumen, boron, brimstone, bromine, brucite, calcite, carbon, celestite, chalcedony, chlorite,… …   Moby Thesaurus

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.