SiO_2对垃圾焚烧飞灰熔融固化特性的影响  

Effects of SiO_2 on Melting and Solidification Characteristics of Fly Ash from Refuse Incinerator

作　　者：姜永海[1] 席北斗[1] 李秀金[2] 王琪[1] 张晓萱[2] 

机构地区：[1]中国环境科学研究院固体废物污染控制技术研究所,北京100012 [2]北京化工大学环境工程系,北京100029

出　　处：《环境科学研究》2005年第z1期71-73,共3页Research of Environmental Sciences

基　　金：国家高技术研究发展计划项目(2002AA644010);国家重点基础研究发展计划项目(2005CB724203)

摘　　要：研究了在飞灰中添加不同比例的SiO2对熔融处理的影响,分析了熔融温度、挥发率、重金属固定率的变化规律。研究表明:SiO2添加量为1%和10%的飞灰熔融温度相差大约70℃,挥发率相差20.7%;处理温度较高时,大量添加SiO2对挥发量影响很小;飞灰中添加SiO2可以增加重金属Pb的固定率,对Cu和Cd的影响不显著,反而使得Zn的固定率降低。结果表明,在较高的处理温度下,温度是影响重金属固定率的主要因素之一,此时大量添加SiO2既不能增强重金属固化效果,也不能达到减少挥发率的目的。The effect of adding different contents of SiO_2 in fly ash on melting and solidification,including the change of melting temperature,volatilization rate and fixed rate of heavy metals was studied.The results showed that the discrepancy of melting temperature and volatilization rate is about(70 ℃) and 20.7%,respectively,with adding of 1% and 10% SiO_2 in fly ash.The volatilization rate is little affected by more content of adding SiO_2 on the higher temperature.Adding SiO_2 in fly ash can increase the fixed rate of Pb and affect Cu and Cd indistinctively,but decrease the fixed rate of Zn instead.In conclusion,the temperature is one of the main influence factors and adding more content of SiO_2 can neither increase the fixed rate of heavy metals nor decrease the volatilization rate.

关 键 词：垃圾焚烧飞灰 熔融固化 重金属 

分 类 号：X705[环境科学与工程—环境工程]