IMECH-IR  > 等离子体与燃烧中心(2009-2011)
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)
Source PublicationJoint Conference: International Thermal Treatment Technologies (IT3) and Hazardous Waste Combustors (HWC)
2009
Conference NameJoint Conference: International Thermal Treatment Technologies (IT3) and Hazardous Waste Combustors (HWC)
Conference DateMay 18, 2009 - May 21, 2009
Conference PlaceCincinnati, OH, United states
AbstractPlasma 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.
KeywordAnalysis 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
ISBN9781615671830
Indexed ByEI
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/60471
Collection等离子体与燃烧中心(2009-2011)
Corresponding AuthorZhang, J. (zhangjinlong@imech.ac.cn)
Recommended Citation
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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