Microstructures and thermal properties of municipal solid waste incineration fly ash

被引：17
|
作者：
Liu Yuan-yuan [1 ]
Wang Jia-jia [1 ]
Lin Xiang [2 ]
Wang Li-ao [2 ]
Zhong Shan [3 ]
Yang Wei [2 ]
机构：
[1] Chongqing Univ, Minist Educ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Chongqing 400044, Peoples R China
[2] Chongqing Univ, Coll Resources & Environm Sci, Chongqing 400044, Peoples R China
[3] Guangxi Normal Univ, Coll Environm & Resources, Guilin 541004, Peoples R China
来源：
JOURNAL OF CENTRAL SOUTH UNIVERSITY | 2012年 / 19卷 / 03期
基金：
中国国家自然科学基金;
关键词：
municipal solid waste incineration; fly ash; thermal treatment; sintering; microstructure; BEHAVIOR;
D O I：
10.1007/s11771-012-1083-5
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
To analyze the feasibility of utilization of thermal technology in fly ash treatment, thermal properties and microstructures of municipal solid waste incineration (MSWI) fly ash were studied by measuring the chemical element composition, specific surface area, pore sizes, functional groups, TEM image, mineralogy and DSC-TG curves of raw and sintered fly ash specimens. The results show that MSWI fly ash particles mostly have irregular shapes and non-typical pore structure, and the supersonic treatment improves the pore structure; MSWI fly ash consists of such crystals as SiO2, CaSO4 and silica-aluminates, and some soluble salts like KCl and NaCl. During the sintering process, mineralogy changes largely and novel solid solutions are produced gradually with the rise of temperature. Therefore, the utilization of a proper thermal technology not only destructs those persistent organic toxicants but also stabilizes hazardous heavy metals in MSWI fly ash.
引用
收藏
页码：855 / 862
页数：8
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