Used to make cement is gypsum or limestone
Limestone, burned to the clinker is crushed into the converter and then burn and add some other things out of the cement.
All have. 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. Then the clinker and gypsum are ground together in a mixture.
Gypsum and limestone are used mainly limestone, but the two materials are not enough.The main components of cement is calcium, silicon, iron, aluminum, commonly used limestone, clay, quartz sand and iron ore powder raw materials, after firing with a small amount of gypsum to grind. The amount of gypsum is very small.
