How many tons of limestone does each produce ten thousand tons of cement?
Portland cement is generally divided into ordinary portland cement, mixed materials, Portland cement and special cement. Portland cement mixing material is added according to the proportion of ordinary portland cement and some other materials processing procedures to achieve special effects, such as slag cement, Portland cement, volcano ash fly ash Portland cement, Portland cement and so on. The raw material of the cement is more active than the original ordinary portland cement or non active mixed material.
The main raw material for the manufacture of cement is limestone (80% ~ 90%, for the mass fraction, the same below), clay (from 10% to 15%) and iron ore powder (1% ~ 2%). In order to control the rate of condensation, gypsum should be added to the clinker by less than 3%
Special cement in the material phase and the production process is somewhat different, such as high alumina cement (aluminate cement) material is bauxite, limestone calcined to get the clinker, and then ground into a cement aluminate
Cement by limestone, clay, iron ore powder mixed in proportion, at this time the mixture called raw materials. And then the calcination, the general temperature of about 1450 degrees, the calcined product called clinker. The clinker and gypsum are then ground together in a mixture, which is called cement. At this time the cement called ordinary Portland cement.
