The main component of limestone is calcium carbonate (CaCO3), which is widely used as a building material and an important raw material for many industries. In my country, it is a resource with a wide range of uses and is widely distributed. Limestone can be used as coating material and brick and tile adhesive; it can be directly processed into stone and fired into quicklime; mixed with clay, etc., and calcined at high temperature to obtain cement; mixed with quartz sand, soda ash, etc. to obtain glass by high temperature melting ; Limestone is used as a flux for ironmaking to remove gangue; quicklime is used as a slag material for steelmaking to remove harmful impurities such as sulfur and phosphorus; calcium carbide is prepared by reacting quicklime and coke in an electric furnace; limestone is processed into relatively pure powder Calcium carbonate is used as a filler for rubber, plastic, paper, toothpaste, cosmetics, etc.