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Title:
The formation mechanism of low leaching glassy slag during plasma arc vitrification treatment of fly ash
Author: 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)
Issued Date: 2008
Conference Name: Air and Waste Management Association - 27th Annual International Conference on Thermal Treatment Technologies 2008
Conference Date: 2008-05-12~2008-05-16
Conference Place: 加拿大蒙特利尔市
Abstract: In 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.
Indexed Type: EI
Subject: 交叉与边缘领域的力学
Corresponding Author: 李要建
Related URLs: 查看原文
Source: Proceedings of the twenty-seventh Annual International Conference on Thermal Treatment Technologies
Publisher: Air and Waste Management Association,
Publish Place: 420 Ft. Duquesne Blvd., Pittsburgh, PA 15222, United States
Language: 英语
ISBN: 9781605603797
Content Type: 会议论文
URI: http://dspace.imech.ac.cn/handle/311007/27001
Appears in Collections:等离子体与燃烧中心(2009-2011)_会议论文

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Recommended Citation:
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]. 见:Air and Waste Management Association - 27th Annual International Conference on Thermal Treatment Technologies 2008. 加拿大蒙特利尔市. 2008-05-12~2008-05-16.http://www.awma.org/IT3/
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