Basic Physicochemical Characteristics of Fly Ash from One Shanghai Municipal Solid Waste Incineration (MSWI) Plant

Hai Ying Zhang; Guo Liang Yuan; Guo Xian Ma

doi:10.4028/www.scientific.net/AMR.531.362

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 531Basic Physicochemical Characteristics of Fly Ash...

Basic Physicochemical Characteristics of Fly Ash from One Shanghai Municipal Solid Waste Incineration (MSWI) Plant

Abstract:

Fly ash collected from municipal solid waste (MSW) incinerator have been characterized in terms of chemical constituents, mineralogical components, acid neutralizing capacity and total salt content. It was found that the fly ash is rich in SiO2, Al2O3, CaO, Fe2O3 and MgO, which may act as glass-formers (SiO2 and Al2O3), melting (Fe2O3) and stabilizing agents (Fe2O3) during thermal treatment process. Major mineralogical components of fly ash involve SiO2, CaCl2, Ca3Si2O7, Ca2SiO40.35H2O, Ca9Si6O21H2O, K2Al2Si2O83.8H2O and AlCl34Al(OH)34H2O. Aqueous solution of fly ash is alkaline with pH over 11. pH and liquid to solid ratio followed the following equation: y=14.905x-0.0338, in which y represents pH value and x liquid to solid ratio. Total salt content is 61%.