Abstract
In term of hazardous waste vitrification, its slag utilization has become a pivotal part of achieving cost reduction. This research has demonstrated the potential of preparing foam glass ceramics through sintering vitrification slag (VS) and biochar (C). It was inferred in TG-DSC analysis that the appropriate sintering temperature for preparing the foam glass ceramics from VS and C was estimated to be roughly 1000–1050°C. The phase and structural transformation of the VS/C system during the sintering process showed that the C promoted the formations of aluminum oxide, grossular ferrian, and merwinite phase; however, the glassy phase still took a leading role. Synchronously, the crystalline phase forming may impact the pore construction. An excellent foam glass showing a dense glossy surface, an evenly distributed honeycomb structure inside, and outstanding integrated performance could be attained through sintering the VS with 2 wt.% C as well as 2 wt.% Na3P2O7 at 1050°C for 60 min. The discoveries could offer an emerging way of employing the VS.
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This work was partially supported by the Key R&D Program of Zhejiang Province, China (2022C03059) and the Scientific Research Project of Zhejiang Provincial Department of Education (Y202147303).
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Long, Y., Song, Y., Jia, J. et al. Preparation of Foam Glass Ceramics by Sintering of Hazardous Waste Vitrification Slag and Biochar. JOM (2024). https://doi.org/10.1007/s11837-024-06392-x
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DOI: https://doi.org/10.1007/s11837-024-06392-x