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Ash from a pulp mill boiler--characterisation and vitrification.
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2010 Jul 15; Vol. 179 (1-3), pp. 303-8. Date of Electronic Publication: 2010 Mar 07. - Publication Year :
- 2010
-
Abstract
- The physical, chemical and mineralogical characterisation of the ash resulting from a pulp mill boiler was performed in order to investigate the valorisation of this waste material through the production of added-value glassy materials. The ash had a particle size distribution in the range 0.06-53 microm, and a high amount of SiO(2) (approximately 82 wt%), which was present as quartz. To favour the vitrification of the ash and to obtain a melt with an adequate viscosity to cast into a mould, different amounts of Na(2)O were added to act as fluxing agent. A batch with 80 wt% waste load melted at 1350 degrees C resulting in a homogeneous transparent green-coloured glass with good workability. The characterisation of the produced glass by differential thermal analysis and dilatometry showed that this glass presents a stable thermal behaviour. Standard leaching tests revealed that the concentration of heavy metals in the leaching solution was lower than those allowed by the Normative. As a conclusion, by vitrification of batch compositions with adequate waste load and additive content it is possible to produce an ash-based glass that may be used in similar applications as a conventional silicate glass inclusively as a building ecomaterial.<br /> (2010 Elsevier B.V. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 179
- Issue :
- 1-3
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 20346582
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2010.03.004