悬浮态下温度对碳酸钙分解产物特性的影响  

Influence of temperature on characteristics of decomposition product of CaCO_3 under suspended state

作　　者：徐迅[1,2] 汪澜[1] 王俊杰[1] 

机构地区：[1]中国建筑材料科学研究总院绿色建筑材料国家重点实验室,北京100024 [2]西南科技大学材料科学与工程学院

出　　处：《无机盐工业》2014年第1期14-16,共3页Inorganic Chemicals Industry

基　　金：973计划项目资助(2009CB623102)

摘　　要：实际生产中,人们往往关注生料入窑分解率指标,而很少考虑生料分解后物料的自身特性。利用高温一维炉设备研究了悬浮态下不同温度条件对碳酸盐反应及产物活性的影响。结果表明:相同停留时间下,900℃下碳酸钙分解率为26.0%,1 150℃下碳酸钙分解率为67.1%;1 150℃下碳酸钙分解产物氧化钙累计水化放热是900℃的近4倍,水化活性大大增强。原因在于1 150℃下分解后的产物结晶细小,孔隙率较高,比表面积较大。因而可利用此特点进一步加快熟料烧成进程。In actual production, people often pay attention to raw material decomposition rate in the kiln, but few of them consider characteristics of decomposition product of raw material.Influences of different temperatures on the reaction of CaCO3 and on product activity under suspended state were investigated with a high temperature one-dimensional furnace.The results showed that under the same resident time, decomposition rate of CaCO3 at 900 ℃ was 26.0%, and 67.1% at 1150 ℃. Because the decomposition product under 1 150 ℃ had finer grains, higher porosity, and greater specific surface area, cumu- lative hydration heat of decomposition product CaO under 1 150 ℃ was higher near 4 times than that of 900 ℃, and hydration activity was greatly enhanced.Then clinker burning process may be speeded up by using this characteristics.

关 键 词：悬浮态 碳酸钙 温度 分解 

分 类 号：TQ132.32[化学工程—无机化工]