Investigation of the mechanism for simulated graphite waste treatment via microwave sintering technology

With the decommissioning of nuclear facilities, an increasing amount of radioactive graphite needs to be treated safely and effectively. In this work, microwave sintering technology was initially applied to treat simulated graphite waste. The effects of microwaves on the phase composition and micros...

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Bibliographic Details
Published inJournal of hazardous materials letters Vol. 2; p. 100046
Main Authors Wei, Guilin, Miao, Yulong, Yuan, Beilong, Lu, Xirui
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.11.2021
Elsevier
Subjects
Microwave sintering
Simulated graphite waste
Treatment mechanism
Microwave sintering
Simulated graphite waste
Treatment mechanism
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Summary:With the decommissioning of nuclear facilities, an increasing amount of radioactive graphite needs to be treated safely and effectively. In this work, microwave sintering technology was initially applied to treat simulated graphite waste. The effects of microwaves on the phase composition and microstructure of graphite were investigated. Combined with the mass loss results and fitting results of the phase, the mechanism for simulated graphite waste treatment via microwave sintering was obtained. According to the results, there are three stages regarding the effect of microwave sintering on the microstructure of graphite waste. This work reveals the potential application of microwave sintering technology in the treatment of graphite waste and its treatment mechanism. [Display omitted] •The mass losses of graphite were in the range of 0.53–1.56%.•Graphite would be reacted with oxygen near 700 ℃.•Microstructure would become distorted and arranged irregularly near 1200 ℃.•Amorphous fraction of the sample increased under the effect of the microwave.
ISSN:2666-9110
2666-9110
DOI:10.1016/j.hazl.2021.100046