Cement Production Process
With the development of the society, it needs more and more buildings to meet people’s living and working demands. Obviously, the quantity demanded of cement increases largely.
Primarily, cement is used to produce concrete which is the world’s most versatile and durable construction material. Some other applications for cement, however, are now growing in importance. It is very necessary and important to learn the cement production process.
Cement production process
In the cement production process, the raw materials should be quarried. Typically limestone, clays and marl, as well as other materials contains the required proportions of silicon, calcium, aluminum and iron oxides are extracted using drilling and blasting techniques. The quarried material is then reduced in size by compression and impact in various mechanical crushers. The crushed rock is reduced in size from 120 cm to between 1.2 and 8 cm. Drying of raw material may also be necessary for efficient crushing and pre-blending.
Then the raw materials will be transported from the quarry using conveyors, rail wagons or other suitable logistics solutions specific to the cement plant. While the crushed limestone and clay is homogenized by stacking and reclaiming in a long layered stockpile. This material is then ready for milling and drying in the kiln. The raw materials are milled and dried in a roller mill. Heavy rollers are held over a rotating table and the course material is milled until it is fine enough to be carried by air to a homogenizing silo.
Next is the filter. Bag filter comprise filters of either woven fabric or needle felts to remove particles from kiln exhaust. The exhaust gas from many kilns is used for drying raw materials, thus improving the energy efficiency of the plant. Preheater, kiln, cooler and clinker silo are the following steps. Next is the cement mill. Finish milling is the grinding together of cement clinker, with around 5% of natural or synthetic gypsum. Other cementitious materials such as slag, fly ash or other pozzolans may also be incorporated into the final cement powder. Till now the whole cement production process is completed.