Microstructures and thermal properties of municipal solid waste incineration fly ash |
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| Authors: | Yuan-yuan Liu Jia-jia Wang Xiang Lin Li-ao Wang Shan Zhong and Wei Yang |
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| Affiliation: | [1]Key Laboratory of The Three Gorges Reservoir Region＇s Eco-environmental of Ministry of Education, Chongqing University, Chongqing 400044, China [2]College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China [3]College of Environment and Resources, Guangxi Normal University, Guilin 541004, China |
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| Abstract: | 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. |
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| Keywords: | municipal solid waste incineration fly ash thermal treatment sintering microstructure |
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