含玻璃相固体废物的蒸压反应特性

Autoclaved Performance of Solid Waste Containing Glass Phase

通过傅里叶变换红外光谱分析、X射线衍射分析、扫描电镜分析等方法研究了粉煤灰、废玻璃和矿渣等固体废弃物-石灰体系的蒸压反应特性.结果表明:1.2 MPa饱和蒸汽压下,固体废弃物的Si—O伸缩振动频率越低,其蒸压样品的结合水量越大,水热反应能力越强;粉煤灰、废玻璃的Si—O伸缩振动频率越低,其蒸压样品的强度越高;矿渣蒸压样品的强度与矿渣的Si—O伸缩振动频率表现出不同于其他两种固体废弃物的规律,这主要是因为矿渣中的活性铝参与了反应,形成大量的水石榴石,导致其蒸压样品的强度下降。

This paper investigates the autoclaved performance of the systems combining lime and such solid waste as fly ash, waste glass and slag by means of VF-IR, XRD and SEM. The results show that （ 1 ） at a saturated vapor pressure of 1.2 MPa, both the hydrothermal reactivity and the amount of combined water of the autoclaved product have an obvious negative correlation with the Si-O stretching vibration frequency; （2） the compressive strength of the autoclaved product containing fly ash or waste glass also has a negative correlation with the Si-O stretching vibration frequency; and （3） different from the other two products, the autoclaved product containing slag has a positive correlation with the Si-O stretching vibration frequency in terms of compressive strength, because there exists a large amount of hydrogarnet due to the reaction of activated Al in the slag with the lime.