Low－temperature Burnt Portland Cement Clinker Using Mineralizer

Decreasing the burning temperature of cement clinkers leads to a rational reduction of CO2 emitted from the cement industries. This study examines the use of CaF2 and CaSO4 as a mineralizer or flux. It was possible to reduce the burning temperature 100℃ below that of the current process（1450℃）by controlling the fluorine and sulfur trioxide in the clinker. The setting and hardening properties of the low－temperature cement equal those of ordinary Portland cement. It was also found that the coating effect of additional mineralizer components on the preheater was insignificant.