The bulk densities of portland cement, ordinary cement, slag cement, pozzolanic cement and fly ash cement are 1~ 1.2g/cm3 and 0.9~ 1g/cm3, respectively.
The bulk density of cement is generally1.6 ~1.8g/sup3; The true density of cement is about 3.0 ~ 3.2g/sup 3. The density of cement slurry is about 2.0 ~ 2.2g/sup 3.
Extended data:
Cement production can be divided into dry method (including semi-dry method) and wet method (including semi-wet method) according to different preparation methods of raw materials.
Dry production: the new dry cement production line refers to the cement produced by the new process of decomposition outside the kiln. Its production takes suspension preheater and decomposition technology outside the kiln as the core, adopts new raw material and fuel homogenization and energy-saving grinding technology and equipment, and adopts computer distributed control throughout the line to realize automation, high efficiency, high quality, low consumption and environmental protection in the cement production process.
Wet production. A method of grinding raw materials into raw slurry with water and sending them into a wet kiln to calcine mature materials. Another method is to dehydrate the raw slurry prepared by wet method, make it into raw material blocks, and put it into a kiln for calcination, which is called semi-wet method and still belongs to one of wet production.