Difference Between Limestone And Calcium Carbonate

2021-08-25

Calcium carbonate is a compound with the chemical formula CaCO3. CAS No. 471-34-1. It is a common substance on earth and can be found in rocks. The main components of animal back shell and snail shell. It exists in nature as calcite and aragonite. Calcite is a kind of hexagonal crystal with cubic crystal system. Pure calcite is colorless and transparent, generally white, containing 56% Cao and 44% Co, density of 2.715g/cm, Mohs hardness of 3, and brittle in nature.

Limestone can be used to produce cement, calcium oxide and calcium carbonate (light calcium carbonate and heavy calcium carbonate). Limestone, calcium oxide and calcium carbonate are widely used as building materials and important raw materials for many industries. Calcium carbonate can be directly processed into stone and fired into calcium oxide. Lime includes quicklime and hydrated lime (also known as hydrated lime, lime calcium powder and calcium hydroxide). The main component of quicklime is Cao, which is generally massive, pure white, light gray or light yellow when containing impurities. Quicklime absorbs moisture or adds water to become hydrated lime (hydrated lime, lime calcium powder and calcium hydroxide), and its main component is Ca (OH) 2. Hydrated lime is mixed into lime slurry, lime paste, lime mortar, etc., which is used as coating material and brick and tile adhesive.