垃圾焚烧飞灰电弧炉熔渣微晶玻璃的晶化行为  

Crystallization Behavior of Glass-ceramics from Arc-melting Slag of Waste Incineration Fly Ash

作　　者：刘汉桥[1] 魏国侠[1] 梁茵[1] 杨俊兰[1] 

机构地区：[1]天津城市建设学院能源与机械工程系,天津300384

出　　处：《土木建筑与环境工程》2012年第2期121-125,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：国家自然科学基金(20806051);中国博士后科学基金(20080440680)

摘　　要：将垃圾焚烧飞灰与适量废玻璃粉混合后用电弧炉熔融处理,产生的水冷熔渣进一步粉碎、压型并在750～1 050℃间热处理制取微晶玻璃,运用同步热分析仪、X射线衍射仪、扫描电镜等测试设备对微晶玻璃的晶化行为及性能进行分析测试。研究表明:微晶玻璃主晶相为硅灰石CaSiO3和少量透辉石Ca(Mg,Al)(Si,Al)2O6,其衍射峰随处理温度升高呈增加趋势,850℃热处理时所得微晶玻璃具有较佳的微观结构和物理、机械及化学性能,其密度为2.62g/cm3、抗弯强度达90.44MPa,耐酸碱性分别为2.7%、0.9%,重金属浸出浓度非常低。To deal with the issue of municipal solid waste incineration fly ash,are melting treatment technology was developed in combination with electric arc furnace metallurgical processes.Glass-ceramics was made of arc-melting slag from waste incineration fly ash and additional glass cullet through crushing,pressing and sintering at temperature between 750 ℃ and 1050 ℃.The crystallization behaviours of the glass-ceramics were examined by differential thermal analysis（DTA）,X-ray diffractometry（XRD） and scanning electron microscopy（SEM）.It is shown that main crystalline phase of the glass-ceramics are wollastonite（CaSiO3） and diopside（Ca（Mg,Al）（Si,Al）2O6）,and the diffraction peaks become more intensive at higher temperature.It is found that the glass-ceramics sintered at 850 ℃ has the optimal physical,mechanical and chemical characteristics,and it has density of 2.62 g/cm3,bending strength of 54.96 MPa,chemical resistance of 2.7% and 0.9% in acid and alkali solution respectively.Furthermore,the leaching concentration of heavy metals is very low.

关 键 词：垃圾焚烧飞灰 电弧炉 熔渣 微晶玻璃 晶化行为 

分 类 号：X705[环境科学与工程—环境工程]