IMECH-IR  > 力学所知识产出(1956-2008)
The formation mechanism of low leaching glassy slag during plasma arc vitrification treatment of fly ash
Li YJ(李要建); Tian JG(田君国); Nie R(聂睿); Wang R(王蕊); Xu YX(徐永香); Sheng HZ(盛宏至); Li YJ(李要建)
Source PublicationProceedings of the twenty-seventh Annual International Conference on Thermal Treatment Technologies
2008
Pages511-521
Conference NameAir and Waste Management Association - 27th Annual International Conference on Thermal Treatment Technologies 2008
Conference Date2008-05-12~2008-05-16
Conference Place加拿大蒙特利尔市
AbstractIn this paper, the glass formation theory is applied to study the formation mechanism of the low leaching glassy slag during the process of plasma waste treatment. The research shows that SiO2 acts as network former to form a 3-dimensional Si-O tetrahedral network in which heavy metals are bonded or encapsulated, so the Si-O tetrahedron protect heavy metals against leaching from the vitrified slag or acid corrosion. For given chemical compositions of waste, the formation ability of the vitrified slag can be represented by the ratio of the whole oxygen ions to the whole network former ions in glass (O/Si) which is appropriate in the range of 2~3. A plasma arc reactor is used to conduct the vitrification experiments of two kinds of fly ashes with additives in which effects of various parameters including arc power, cooling speed, treatment temperature are studied. The chemical compositions of fly ashes are analyzed by X-ray fluorescence (XRF) spectrometry. The experimental results show that both cooling speed and O/Si have important influence on the formation of the vitrified slag, which is qualitatively in accordance with the predictions of the glass formation theory.
ISBN9781605603797
URL查看原文
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/27001
Collection力学所知识产出(1956-2008)
Corresponding AuthorLi YJ(李要建)
Recommended Citation
GB/T 7714
Li YJ,Tian JG,Nie R,et al. The formation mechanism of low leaching glassy slag during plasma arc vitrification treatment of fly ash[C]Proceedings of the twenty-seventh Annual International Conference on Thermal Treatment Technologies,2008:511-521.
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