不同种类CFB粉煤灰的特性对比研究  

Research of different kinds of CFB fly ashes

作　　者：赵少鹏[1] 王彩萍[1] 陈岩[1] 周明凯[1] 

机构地区：[1]武汉理工大学硅酸盐建材材料国家重点实验室,湖北武汉430070

出　　处：《河北工程大学学报（自然科学版）》2015年第1期79-82,共4页Journal of Hebei University of Engineering:Natural Science Edition

摘　　要：以山西昱光电厂不同机组的CFB粉煤灰为研究对象,根据CFB锅炉热工制度及脱硫工艺的不同,将CFB粉煤灰分为高温高钙型(F1)、低温低钙型(F2)和低温高钙型(XF2)。通过X射线衍射、需水性、活性和减水剂的相容性试验,对比分析了各种CFB粉煤灰的性能。结果表明:F1的晶体矿物种类最多,但是无定型态矿物含量最低;未经粉磨的三种CFB粉煤灰需水性大,活性低,当比表面积达到600 m2/kg,需水量比接近100%;三种灰各凝期活性指数大小顺序为XF2>F2>F1,且F2与XF2的28天活性指数能达到95%以上;各种CFB粉煤灰与聚羧酸减水剂的相容性好,与萘系减水剂的相容性差。The different kinds of circulating fluid bed （CFB） fly ashes from Yuguang gangue - fried power plant in Shanxi Province were studied. According to the different thermal systems and methods of desulfurization of CFB boiler, CFB fly ashes could be divided into 3 types ： high temperature and high calcium type （F1）, low temperature and low calcium type （F2） and low temperature and high calcium type （XF2）. The properties of different kinds of CFB ashes were investigated based on X - ray diffraction, water demand ratio, activity index and compatibility with admixtures. The results show that the number of crystal species of F1 is the most, but the content of amorphous state is the lest; Three types of CFB fly ashes that have not been grinded have high water demand ratio and low activity index, the water demand ratio can be 100% when the specific surface area of fly ash is 600m^2/kg ; The order of activity index is ： XF2 〉 F2 〉 F1, and the activity index of F2 and XF2 can be higher than 95%. The eonformability between 3 types CFB fly ashes and super plasticizers is well, but the eonformability is bad with naphthalene water reducer.

关 键 词：CFB粉煤灰 需水量比 活性指数 相容性 

分 类 号：TQ172.44[化学工程—水泥工业]