氯氧镁水泥对焚烧飞灰固化作用及影响因素  

Experimental study on the solidification technology and affecting factors in treating with fly ash using magnesium oxychloride cement

作　　者：王彩萍[1] 周明凯[1] 陈潇[1] 杨如仙 黎小保[3] 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,湖北武汉430070 [2]中钢集团武汉安全环保研究院,湖北武汉430081 [3]中国恩菲工程技术有限公司,北京100038

出　　处：《功能材料》2013年第21期3186-3189,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(SS2012AA062204);硅酸盐建筑材料国家重点实验室(武汉理工大学)开放基金资助项目(SYSJJ2012-03)

摘　　要：利用氯氧镁水泥对飞灰进行固化处理,研究了氯氧镁水泥对飞灰重金属离子的固化效果及影响因素。结果表明,氯氧镁水泥对飞灰固化存在一个最佳摩尔比,在最佳摩尔比条件下Pb浸出浓度最低,固化率达94%;随着活性氧化镁含量上升(由28.9%提高到60.56%),Pb浸出浓度显著降低,固化率提高23.9%,当活性氧化镁含量进一步增加时,Pb浸出浓度降低幅度减小;按摩尔比为10∶1,水灰比为0.3配制氯氧镁水泥,在掺量为20%的条件下,固化效果优于掺量为40%的P·O42.5水泥,且满足生活垃圾填埋标准的限值,具有很好的应用前景。：Fly ash was solidified by magnesium oxychloride cement, the solidification effects and factors of mag- nesium oxychloride cement in treating with fly ash were experimentally studied. The results indicated that fly ash treated with magnesium oxychloride cement had a optimum molar ratio. And under this condition, the leac- hing concentration was lowest, immobilized ratio was 94% with increasing the amount of active magnesium oxide from 28.9 G to 60.56% ,the leaching concentration for Pb was significantly reduced and solidification ratio improved 23.9G. When the amount of active magnesium oxide was further increased, the leaching concentra- tion for Pb was found decreased slowly; magnesium oxychloride cement was prepared in molar ratio of 10 ： 1 water-cement ratio of 0.3,the effect of solidification of this material with 20% content got better than comment portland 42.5 cement with 40% content and it meets the landfill standard. Moreover, the new solidification agent has a bright future for application.

关 键 词：垃圾焚烧飞灰 氯氧镁水泥 固化作用 影响因素 

分 类 号：X705[环境科学与工程—环境工程] TU525.9[建筑科学—建筑技术科学]