2002•Journal of Zhejiang University(Engineering Science)Requires access
Kinetic study of MSW incineration fly ash melting by DSC-DTA
Shuiqing Li
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Abstract
In this work,the melting process of MSWI (municipal solid waste incineration) fly ash was studied by high temperature DSC DTA experiments performed under temperature range of 20～1 450℃, and some other parameter variables including atmosphere (O 2 and N 2), heating rates(5℃/min,10℃/min,20℃/min) and CaO addition. Two samples of MSWI fly ash used in the experiment were collected from a power station in southern China and the Rouen power station in France respectively. 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℃, 480～670℃ and 1 101～1 244℃, respectively. Finally, a zero order kinetic model of fly ash melting reaction was established and the apparent activation energy of MSWI ash melting was obtained.