Calcium lime reacts with water, and then it will be heated to a high temperature exceeding 300℃ immediately.

CaO + H2O ====? Ca(OH)2? The reaction is exothermic!

Lime, the main component of which is calcium oxide, is usually prepared by calcining natural rocks with calcium carbonate as the main component at high temperature, which can be decomposed into carbon dioxide and calcium oxide (chemical formula: CaO, namely quicklime, also known as marble).

All natural rocks with calcium carbonate as the main component, such as limestone, chalk and dolomitic limestone, can be used to produce lime.

use

Quicklime is a commonly used desiccant to remove water vapor by chemical absorption, and it is also used in steel, pesticide, medicine, desiccant, tanning and alcohol dehydration. It is especially suitable for puffed food, mushrooms, fungus and other local products, as well as products in instruments, medicine, clothing, electronic telecommunications, leather, textile and other industries.

Lime and limestone are widely used as building materials and important raw materials for many industries. Limestone can be directly processed into stone and burnt into quicklime. Lime includes quicklime and hydrated lime. The main component of quicklime is CaO, which is generally massive, pure white, and light gray or light yellow when containing impurities. When quicklime absorbs moisture or adds water, it becomes slaked lime, which is also called slaked lime, and its main component is Ca(OH)2.

Hydrated lime is blended into lime slurry, lime paste, lime mortar, etc., which is used as coating material and tile adhesive. Soda soda is made from limestone, salt, ammonia and other raw materials through multi-step reaction (Solway method). Caustic soda is made by the reaction of slaked lime and soda ash (causticization method).

References:

Quicklime-Baidu Encyclopedia