Quick Lime is a calcium oxide formed by calcining calcium carbonate (Limestone) so that carbon dioxide is liberated. Quick Lime is also called as Burnt Lime, Handpicked Lime, Calcined Lime, Lump Lime or Caustic Lime. A caustic substance that is prepared by burning Limestone at approximately 900 degrees celsius. At these high temperatures, carbon dioxide is driven off, and the Limestone is converted to Quick Lime.
A chemical compound with the formula (CaO) is a whitish, odourless alkaline substance, which does not dissolve well in water. It can be used as a lining material. Major use is in various industrial processes like metal smelting, paper bleaching, sulphur neutralisation in sugar, and so on.
It is used in many water and wastewater treatment operations, such as softening. Quick Lime is created by heating Limestone as shown in the following equation:
Calcium oxide is usually made by the thermal decomposition of materials, such as Limestone or seashells, that contain calcium carbonate (CaCO3; mineral calcite) in a lime kiln. This is accomplished by heating the material to above 825 °C (1,517 °F), a process called calcination or lime-burning, to liberate a molecule of carbon dioxide (CO2), leaving Quick Lime behind. This is also one of the few chemical reactions known in prehistoric times.
CaCO3(s) → CaO(s) + CO2(g)
Specification
Quick Lime Powder
Calcium oxide (formula: CaO), commonly known as Quick Lime or Burnt Lime, is a widely used chemical compound. It is a white, caustic, alkaline, crystalline solid at room temperature. The broadly used term lime connotes calcium-containing inorganic compounds, in which carbonates, oxides, and hydroxides of calcium, silicon, magnesium, aluminium, and iron predominate. By contrast, Quick Lime specifically applies to the single compound calcium oxide. Calcium oxide that survives processing without reacting in building products, such as cement, is called free lime.
Preparation
Calcium oxide is usually made by the thermal decomposition of materials, such as Limestone or seashells, which contain calcium carbonate (CaCO3; mineral calcite) in a lime kiln. This is accomplished by heating the material to above 825 °C (1,517 °F), a process called calcination or lime-burning, to liberate a molecule of carbon dioxide (CO2), leaving Quick Lime behind. This is also one of the few chemical reactions known in prehistoric times.
CaCO3(s) → CaO(s) + CO2(g)
The quicklime is not stable and, when cooled, will spontaneously react with CO2 from the air until, after enough time, it will be completely converted back to calcium carbonate unless slaked with water to set as lime plaster or lime mortar.
Widely use of Quick Lime Powder
- AAC block manufacturing
- Effluent treatment plant
- Road & building construction.
- Paint & pigment as chemicals
- Lubricants & petroleum refinery
