Abstract: Blank raw meal mixed with different 0.1%, 0.3%, 0.5%, 1.0%, 1.5% of ZnO respectively and sintered at 1300 ℃, 1350 ℃, 1400 ℃, 1450 ℃ to make clinkers.These obtained clinkers were characterized by glycerin-ethanol method, X-ray diffraction with the Rietveld method, and petrographic analysis.The results show that better burnability of cement raw meal doped with defined content of ZnO is observed;obviously, the absorption of f-CaO at low temperature is higher than that of industrial raw meal without mixing with ZnO.With the incremental dosage of ZnO in mineral compositions at different sintered temperature, the content of alumino phase is reduced;the dosage of ferrite phase is increased, the content of C3S (tricalcium silicate) is gradually increased.When the dosage of ZnO is 1.5% at 1450 ℃ the phase of C3S is transformed from M3 to M1.It can be seen from petrographic of sample clinkers after sintered at 1450 ℃ that with the contents of ZnO in raw meals adjust the crystal appearance to attain good microstructure of clinker.

Key words: cement clinker;ZnO;burnability