利用粉煤灰制备高比表面积二氧化硅的实验研究  

Experimental Research on Preparation of High Specific Surface Area SiO_2 from Fly Ash

作　　者：王蕾[1] 马鸿文[1] 聂轶苗[1] 李贺香[1] 

机构地区：[1]中国地质大学矿物材料国家专业实验室,北京100083

出　　处：《硅酸盐通报》2006年第2期3-7,共5页Bulletin of the Chinese Ceramic Society

基　　金：矿物材料国家专业实验室开放基金资助(04101).

摘　　要：将粉煤灰与Na2CO3以一定比例磨细混合均匀,在反应温度800～900℃,保温时间60～120min下进行反应。以浓度为3.14mol/L的盐酸对反应产物进行酸浸,经过滤除杂后的体系由溶胶相向凝胶相转变,再次过滤、干燥得最终SiO2产品,该SiO2质量分数在98%以上,比表面积为775.12m2/g。Fly ash that was well-mixed with Na2CO3 in a certain ratio was reacted at 800-900℃ for 60-120 min. The reacted product was soaked with HCl 3.14mol/L, after filtering and removing impurity, the solution was changed from sol to gel. The final SiO2 with SiO2 content above 98% and specific surface area 775.12 m^2/g was obtained through filtering and drving once again.

关 键 词：粉煤灰 烧结 酸浸 高比表面积氧化硅 

分 类 号：TQ424.1[化学工程] X770.5[环境科学与工程—环境工程]