IMECH-IR  > 等离子体与燃烧中心(2009-2011)
Alternative TitleFormation mechanism of vitrified slag and heavy metal fixed efficiency
张金龙; 李要建; 王贵全; 徐永香; 盛宏至
Source Publication化工学报
Other AbstractPlasma technology is international advanced technology to destroy various types of hazardous wastes.The vitrified slag can form in the process of plasma treatment of inorganic wastes and effectively fix heavy metals,and its leaching rate is very low.Explained the formation mechanism of vitrified slag using the concept of silicon-oxygen ratio,and verified by experiment.Concluded that the vitrified slag can form at silicon-oxygen ratio less than 3,and crystal will grow at silicon-oxygen ratio more than 3.Find out the most important factors among 7 factors,including silicon-oxygen ratio,basicity,heavy metal contents,temperature,treating time,fly-ash types and constituents,to the heavy metal fixed efficiency using a 30 kW DC plasma arc reactor system.Concluded that the temperature and the heavy metal contents are the most important factors and directly influenced the heavy metal As,Pb and Zn fixed efficiency,the other 5 factors little effect on the heavy metal fixed efficiency.With increasing temperature,the heavy metal fixed efficiency dropped.As the heavy metal contents increases,the heavy metal fixed efficiency increased and then decreased before,and reached a maximum value at 6mg·g-1.But all of 7 factors didn’t effect to the metal Cr fixed efficiency,the heavy metal Cr fixed efficiency are more than 85% in all experiments.The heavy metal fixed process is divided into 4 stages depend on the temperature of crucibles wall heated.80% of escape heavy metal run away at volatilization period which last 6—10 minutes from heat beginning.So how to control the heavy metals running away at volatilization period is the best way to improve the heavy metals fixed efficiency.
Keyword玻璃体 重金属 等离子体 氧硅比
Subject Area力学
Indexed ByEI
Funding Organization中国科学院知识创新工程领域前沿项目
Document Type期刊论文
Corresponding Author张金龙
Recommended Citation
GB/T 7714
张金龙,李要建,王贵全,等. 玻璃体形成机理与重金属固定效率[J]. 化工学报,2011,62(S1):215-218.
APA 张金龙,李要建,王贵全,徐永香,&盛宏至.(2011).玻璃体形成机理与重金属固定效率.化工学报,62(S1),215-218.
MLA 张金龙,et al."玻璃体形成机理与重金属固定效率".化工学报 62.S1(2011):215-218.
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