硅酸盐通报2018，Vol.37Issue(3)：1003-1009,7.
氧化钙添加剂对碳酸钠活化粉煤灰的影响及机理
Effect and Mechanism Analysis of Calcium Oxide Additive on the Sodium Carbonate Activation of Fly Ash
摘要
Abstract
Coal fly ash calcined with sodium carbonate is an effective method to activate the reactivity of aluminum and silicon in it; however, the large consumption of sodium carbonate hinders its industrial application.In this paper,the effect of calcium oxide additive on the sodium carbonate activation of coal fly ash for aluminum extraction was studied by orthogonal experiment and single factor experiment at the medium temperature(600-1000℃).The results show that the sodium carbonate can be partially replaced by adding a certain percentage of calcium oxide in the reaction system at the medium temperature.When the mass ratio of coal fly ash, sodium carbonate, and calcium oxide equaled to 1:0.6:0.2, the dissolution percentage of aluminum from coal fly ash can be more than 90%.Through FT-IR and XRD analysis,it is found that the partial substitution of sodium carbonate by calcium oxide is mainly due to the formation of calcium silicate with the low polymerization degree.关键词
粉煤灰/碳酸钠/氧化钙/焙烧活化/氧化铝Key words
coal fly ash/sodium carbonate/calcium oxide/activation/alumina分类
建筑与水利引用本文复制引用
燕可洲,郭彦霞,李宁静,程芳琴..氧化钙添加剂对碳酸钠活化粉煤灰的影响及机理[J].硅酸盐通报,2018,37(3):1003-1009,7.基金项目
国家重点研发计划(2017YFB0603101) （2017YFB0603101）
山西省煤基低碳科技重大专项(MC2016-05) （MC2016-05）
三晋学者支持计划专项 （）
