环境工程学报2017，Vol.11Issue(4)：2469-2474,6.DOI:10.12030/j.cjee.201601077
机械力活化固硫灰固化处理生活垃圾焚烧飞灰
Solidification/Stabilization of MSWI fly ash with CFBC fly ash activated by mechanochemical method
摘要
Abstract
To safely dispose municipal solid waste incineration (MSWI) fly ash,circulating fluidized bed combustion (CFBC) fly ash was substantially activated by a mechanochemical method to immobilize the MSWI fly ash.The present research explored the effect on the performance of the solidified waste that immobilized the MSWI fly ash.Furthermore,the solidification mechanism of heavy metals from MSWI fly ash was investigated using X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy.The research showed,under these conditions that MSWI fly ash mixing ratio was 60％,velocity of milling was 600 r · min-1,milling time was 5 h,by curing after 28 d and 56 d at 60 ℃,the compressive strength of solidified wastes were 15.6 MPa and 17.9 MPa respectively.Meanwhile,the leaching amounts of Zn、Pb、Cu、Cd、and Cr metals,which were detected by atomic absorption spectroscopy (AAS) in the solidified waste,were much lower than the national standard value (GB 5085.3-2007).The XRD and FTIR analysis indicated that the hydration products of the solidified waste were calcium silicate hydrate (C-S-H),gismondine,ettringite (AFt),etc.Moreover,the heavy metals from the MSWI fly ash mainly were physically encapsulated in the C-S-H and chemically absorbed in the structures of the gismondine and AFt.关键词
城市生活垃圾焚烧飞灰/循环流化床燃煤固硫灰/机械力化学法/固化处理/重金属Key words
MSWI fly ash/CFBC fly ash/mechanochemical method/solidification/heavy metals分类
资源环境引用本文复制引用
齐一谨,彭熙,徐中慧,徐亚红,蒋灶,罗日主..机械力活化固硫灰固化处理生活垃圾焚烧飞灰[J].环境工程学报,2017,11(4):2469-2474,6.基金项目
固体废物处理与资源化教育部重点实验室专职科研创新团队建设基金资助项目(14tdgk04) （14tdgk04）
西南科技大学研究生创新基金资助项目(16ycx030) （16ycx030）
