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The impact of additives on the formation and leaching characteristics of the vitrified slag
Zhang JL(张金龙); Li YJ(李要建); Xu YX(徐永香); Sheng HZ(盛宏至); Zhang, J. (zhangjinlong@imech.ac.cn)
2009
会议名称Joint Conference: International Thermal Treatment Technologies (IT3) and Hazardous Waste Combustors (HWC)
会议日期May 18, 2009 - May 21, 2009
会议地点Cincinnati, OH, United states
会议录名称Joint Conference: International Thermal Treatment Technologies (IT3) and Hazardous Waste Combustors (HWC)
摘要Plasma technology is a state-of-the-art technology to destroy various types of hazardous wastes. The vitrified slag can form in the process of plasma treatment of inorganic wastes and effectively stabilize and immobilize heavy metals, and its leaching rate is very low. In this paper, the impact of additives on the formation and leaching characteristics of the vitrified slag has been studied by a 30 kW DC plasma arc reactor system and rotating agitator, respectively. In the experiment, the mixtures of additives (SiO2, Na2CO3, Na2SiO3 and CaO) and two types of fly ashes have been vitrified, and leaching rates of the vitrifies slag have been tested according to Identification standards for hazardous wastes - Identification for extraction toxicity (GB 5085.3-2007). XRD (X-ray diffraction) analysis results of the microscopic structures of the vitrified slag show they are amorphous. The impact of additives depend on the ration of O/Si (the ratio of the whole oxygen ions to the whole network former Si ions in the vitrified slag, range of 2-3) and the basicity (range of 0.2-0.8), which are the determinative factors in the formation of the vitrified slag. The bigger ratio of O/Si and the narrower peak width of the spectrum lead to the higher leaching characteristics and more unstable vitrified slag.
关键词Analysis Results Arc Dc Plasma Hazardous Wastes Inorganic Waste Leaching Characteristics Leaching Rates Microscopic Structures Oxygen Ions Peak Widths Plasma Technology Plasma Treatment Reactor Systems Si Ions State-of-the-art Technology Xrd
ISBN号9781615671830
收录类别EI
语种英语
文献类型会议论文
条目标识符http://dspace.imech.ac.cn/handle/311007/60471
专题等离子体与燃烧中心(2009-2011)
通讯作者Zhang, J. (zhangjinlong@imech.ac.cn)
推荐引用方式
GB/T 7714
Zhang JL,Li YJ,Xu YX,et al. The impact of additives on the formation and leaching characteristics of the vitrified slag[C],2009.
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