Abstract
A chemical recycling method by using phase separation was applied to municipal waste slags. Glasses were prepared from incineration ash and ash-melted slag, where B2O3 was added to promote phase separation. The glasses were heat-treated at temperatures higher than their glass transition temperatures, and they were soaked in hydrochloric acid, leaching CaO, Fe2O3, K2O, and S. Transparent and colorless solids containing ca. 80 mass% of SiO2 were successfully obtained as residues. It was suggested that phase separation took place not in the heat-treatment but in the vitrification process, and further characterizations are however required to investigate the phenomena at microscopic levels in the recycling processes.
Original language | English |
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Pages (from-to) | 1195-1198 |
Number of pages | 4 |
Journal | Journal of the Ceramic Society of Japan |
Volume | 117 |
Issue number | 1371 |
DOIs | |
Publication status | Published - Nov 2009 |
Keywords
- Chemical recycling
- Glass
- Municipal waste slag
- Phase separation
- Waste recycling
ASJC Scopus subject areas
- Ceramics and Composites
- Chemistry(all)
- Condensed Matter Physics
- Materials Chemistry