水泥生产过程

The diagram illustrates the stages and equipment involved in the production of cement.

Overall, the cement-making process is a linear manufacturing procedure consisting of six main stages, from the initial crushing of raw materials to the final packaging of the finished cement powder. The process involves both physical and chemical transformations, with the high-temperature kiln stage being the most critical.

First, limestone and clay are crushed by a crusher to form a fine powder. This powder is then thoroughly mixed before being fed into a rotating kiln. Inside the kiln, the mixture is heated to a temperature of between 1,400 and 1,500 degrees Celsius, which transforms it into small, hard nodules known as clinker.

Once the clinker has cooled in a cooling chamber, it is ground by a rotating mill into an extremely fine powder. A small amount of gypsum is then added to this powder to regulate the setting time of the cement. Finally, the finished cement is bagged and made ready for distribution to construction sites.