2002•Unpublished venueRequires access
MSW Incineration Fly Ash Melting by DSC-DTA
Moe Clean
Open publisher page 1 citations
Abstract
Melting characteristics of two kinds of municipal solid waste incineration(MSWI) fly ash were studied in this paper by high temperature differential scanning calorimetry and differential temperature analysis. MSWI fly ash was considered as hazardous waste because it contains heavy metals and dioxins. The experiments were performed in either N 2 or O 2 atmosphere in temperature range of 20℃～1450℃ at various heating rates. Two different MSW incineration fly ashes used in the experiments were collected from our country and France respectively. The process of fly ash melting exhibits two reactions occurring at temperature ranges of about 480℃～670℃ and 1136℃～1231℃, respectively. The latent heat of polymorphic transformation and fusion were approximately 20kJ/kg and 700kJ/kg, while the total heat required for melting process was about 1800kJ/kg. The paper also studied effect of CaO to melting. A heat flux thermodynamic model for fly ash melting was put forward and it agrees well with experimental data.