Hydrated lime - micronized lime

Hydrated lime - micronized lime

Lime or calcium oxide with the chemical formula CaO is a chemical compound with Pubcom ID 14778; Its molar mass is 56,077 g/mol. [1] It is an odorless white or gray-white substance and is hard in solid form, which irritates the skin and eyes severely. It is one of the materials whose effectiveness has been known by mankind since ancient times, and it was used in the construction of various buildings and for stronger connection of stone or wood pieces.

For a long time, Iranians have known Shefteh Akhki (lime and soil mortar), Saroj (lime and ash mortar) and blue lime mortar and built buildings with them. After the Second World War, in industrialized countries, limestone is used to stabilize the ground, especially for road foundations and to prevent plant growth and water seepage in the bed, shoulders and slopes of roads, runways and airplane stations. They make a foundation and seal it with limestone. [2] It can be made from under the kettle.

limestone The type of market lime (quick lime) depends on the foreign bodies in it. If the limestone has more than 90% of its weight in calcium carbonate, the lime that is baked from it is quicklime, and if the calcium carbonate is less than 75% of its weight, the lime that is baked from it is low-quick lime.[2]

Dead lime and lime juice Whenever water is poured on calcium oxide (quicklime), due to the reaction with water, it creates heat, which causes a part of the water to evaporate. In this process, lime swells due to water absorption and then becomes a white round, which is called dead lime (because it no longer reacts when in contact with water). This process is also called lime blooming.

Whenever some water is added to dead lime, it turns into slaked lime, which, if filtered, produces a clear solution that is actually a saturated solution of calcium hydroxide in water, which is called lime water. Lime water has many applications in the chemical industry. For example, it is used in the preparation of sodium hydroxide, ammonia, metal hydroxide, perchlorine, and especially in the extraction of magnesium from sea water.[2]

Characteristics of lime White lime is obtained after calcining limestone. Its specific weight is 3.08 to 30.3 g/cm³, which depends on the degree of heat of baking limestone, the higher it is, the slower the baked lime combines with water. In the heat of more than 1000 degrees, the lime collects a little and its top surface is slightly reduced, it is mixed with water slowly, its blooming becomes slow. Lime changes its phase to a liquid state in the heat of 2580 to 2750 degrees and a pressure of one bar (atmosphere).

Crystalline lime is in the form of a colorless cube with a yellow tint. Its degree of difficulty reaches 3 to 4. Water slowly sinks into it from the surface of crystalline limestone. If the powder of lime crystal is poured into water, after a few minutes it will combine with an explosive state. Whenever lime powder is kept at a temperature of 1400 to 1500 degrees, its grains stick to each other and crystallize, and the crystallized grains gradually become coarse. [2]