期刊
WASTE MANAGEMENT & RESEARCH
卷 36, 期 5, 页码 415-425出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0734242X18763064
关键词
Combustible solid waste; gasification-melting; ash fusion; scanning electron microscopy and energy dispersive spectrometer analysis; eutectics
资金
- Natural Science Fund for Colleges and Universities in Jiangsu Province [17KJB480006]
- Scientific Foundation of Nanjing Institute of Technology [YKJ201609]
- Foundation of Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education
- Foundation of Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration [JPELBCPI2016003]
To achieve high-temperature gasification-melting of combustible solid waste, ash melting behaviour under conditions simulating high-temperature gasification were studied. Raw ash (RA) and gasified ash (GA) were prepared respectively by waste ashing and fluidized bed gasification. Results of microstructure and composition of the two-ash indicated that GA showed a more porous structure and higher content of alkali and alkali earth metals among metallic elements. Higher temperature promoted GA melting and could reach a complete flowing state at about 1250 degrees C. The order of melting rate of GA under different atmospheres was reducing condition > inert condition > oxidizing condition, which might be related to different existing forms of iron during melting and different flux content with atmosphere. Compared to RA, GA showed lower melting activity at the same condition due to the existence of an unconverted carbon and hollow structure. The melting temperature for sufficient melting and separation of GA should be at least 1250 degrees C in this work.
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