Clinker Production

~100C free water evaporates.

~150-350C loosely bound water is lost from clay.

~350-650Cdecomposition of claySiO

2&Al

2O

3

~600Cdecomposition of MgCO

3MgO&CO

2 (evaporates)

~900Cdecomposition of CaCO

3CaO&CO

2 (evaporates)

~1250-1280Cliquid formation & start of compound formation.

~1280Cclinkering begins.

~1400-1500Cclinkering

~100Cclinker leaves the kiln & falls into a cooler.

Sometimes the burning process of raw materials is performed in two stages:

preheating upto 900C & rotary kiln