Vitrification of MSWI Fly Ash by Thermal Plasma Melting and Fate of Heavy Metals
Vitrification of MSWI Fly Ash by Thermal Plasma Melting and Fate of Heavy Metals
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DOI：
10.1088/1009-0630/14/9/08
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发表时间：
2012-09
影响因子：
1.7
通讯作者：
Guohua Ni;Zhao Peng;Jiang Yiman;Yuedong Meng
中科院分区：
文献类型：
--
作者：
Guohua Ni;Zhao Peng;Jiang Yiman;Yuedong Meng
Municipal solid waste incinerator (MSWI) fly ash with high basicity (about 1.68) was vitrified in a thermal plasma melting furnace system. Through the thermal plasma treatment, the vitrified product (slag) with amorphous dark glassy structure was obtained, and the leachability of hazardous metals in slag was significantly reduced. Meanwhile, it was found that the cooling rate affects significantly the immobility of heavy metals in slag. The mass distribution of heavy metals (Zn, Cd, Cr, Pb, As, Hg) was investigated in residual products (slag, secondary residues and flue gas), in order to analyze the behavior of heavy metals in thermal plasma atmosphere. Heavy metal species with low boiling points accounting for the major fraction of their input-mass were adsorbed in secondary residues by pollution abatement devices, while those with high boiling points tended to be encapsulated in slag.
