Al_2O_3对CaO烧结过程的作用  

EFFECT OF Al_2O_3 ON SINTERING PROCESS OF CaO CLINKER

作　　者：刘新田[1] 周尧和[2] 商宝禄[2] 

机构地区：[1]云南工学院机械系 [2]西北工业大学材料系

出　　处：《硅酸盐学报》1991年第1期92-96,共5页Journal of The Chinese Ceramic Society

摘　　要：在较低温度下(≤1600℃),将添加Al_2O_3的高纯石灰石在不同煅烧温度下制得了CaO烧结熟料。考察了煅烧温度、保温时间及不同的Al_2O_3添加量对CaO烧结的作用。 试验结果表明,Al_2O_3的加入使CaO在煅烧过程中得到发育良好的晶粒和极低的显气孔率。在高于1500℃煅烧的试样中,显气孔率与保温时间之间呈对数关系。这种烧结熟料良好的抗水化性能在于其极低的显气孔率和发育良好的CaO晶粒自身水化活性的降低。At a lower temperature (≤1600℃), CaO clinkers were fabricated using high grade limestone with Al_2O_3 as additive. The effects of sintering temperature, holding time and amount of Al_2O_3 on the sintering behaviour of CaO clinker were examined.Experimental results show that CaO clinker of good grain growth and very low apparent porosity is obtained through the addition of Al_2O_3. When the sintering temperature is higher than 1500℃, a logarithmic relation between apparent porosity of CaO clinker and sintering time is obtained. The good hydration-resistance of such CaO clinker is attributed to it's low apparent porosity and the rclatively low hydration activity of fully crystalized CaO grains.

关 键 词：氧化钙 氧化铝 CAO AL2O3 烧结工艺 温度 显气孔率 熟料 耐火材料 

分 类 号：TQ175[化学工程—硅酸盐工业]