Investigation of MSWI fly ash melting characteristic by DSC-DTA

Journal Article · Sun Jul 01 04:00:00 EDT 2007 · Waste Management

DOI:https://doi.org/10.1016/j.wasman.2006.11.017· OSTI ID:21023858

Li, Rundong ^[1]; Wang, Lei; Yang, Tianhua; Raninger, Bernhard ^[1]

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1. Institute of Clean Energy and Environmental Engineering, Liaoning Key Laboratory of Clean Energy, Shenyang Institute of Aeronautical Engineering, Shenyang 110136 (China)

The melting process of MSWI (Municipal Solid Waste Incineration) fly ash has been studied by high-temperature DSC-DTA experiments. The experiments were performed at a temperature range of 20-1450 deg. C, and the considerable variables included atmosphere (O{sub 2} and N{sub 2}), heating rates (5 deg. C/min, 10 deg. C/min, 20 deg. C/min) and CaO addition. Three main transitions were observed during the melting process of fly ash: dehydration, polymorphic transition and fusion, occurring in the temperature range of 100-200 deg. C, 480-670 deg. C and 1101-1244 deg. C, respectively. The apparent heat capacity and heat requirement for melting of MSWI fly ash were obtained by DSC (Differential Scanning Calorimeter). A thermodynamic modeling to predict the heat requirements for melting process has been presented, and it agrees well with the experimental data. Finally, a zero-order kinetic model of fly ash melting transition was established. The apparent activation energy of MSWI fly ash melting transition was obtained.

• OSTI ID: 21023858
• Journal Information: Waste Management, Journal Name: Waste Management Journal Issue: 10 Vol. 27; ISSN WAMAE2; ISSN 0956-053X
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTIVATION ENERGY
CALCIUM OXIDES
CALORIMETERS
CALORIMETRY
COMBUSTION
DEHYDRATION
DIFFERENTIAL THERMAL ANALYSIS
FLY ASH
HEAT
MELTING
SIMULATION
SOLID WASTES
SPECIFIC HEAT
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 1000-4000 K