Comparison of temperature field distribution between cement preclinkering technology and cement precalcining technology

Abstract

Through the comparison of calcination conditions between cement preclinkering technology and cement precalcining technology, we studied the characteristics of temperature field distribution of cement preclinkering technology systems including cyclone preheater, preclinkering furnace, and rotary kiln. We used numerical simulation method to obtain data of temperature field distribution.Some results are found by system study. The ratio of tail coal of cement preclinkering technology is about 70%, and raw meal temperature can reach 1070 °C. Shorter L/D kiln type of preclinkering technology can obtain more stable calcining zone temperature. The highest solid temperature of cement preclinkering technology is higher than 80 °C, and high temperature region (>1450 °C) length is 2 times, which is beneficial for calcining clinker and higher clinker quality. So cement preclinkering technology can obtain more performance temperature filed, which improves both the solid-phase reaction and liquid-phase reaction.