Utilization trials of lignite solid byproducts of West Macedonia and Peloponnesus lignite fired power plants for the production of lightweight aggregates
Résumé
The production of lightweight aggregates from the utilization of solid byproducts [fly ash (FA) and bottom ash (BA)], of the lignite fired power plants from West Macedonia (Kardia, Ptolemaida) and Peloponnesus (Megalopolis), has been investigated in this study. Sintering of FA and BA with the grate sinter band method was selected because it exploits the energy content of the raw materials for the increase of temperature and completion of the material’s sintering. These byproducts contain the necessary carbon content for temperature increase during the sintering process. Detailed XRD analyses show that Megalopoli’s FA contains high amounts of amorphous phase (25-54wt%) while fly ashes from Kardia and Ptolemaida power units are more crystalline. Lime and anhydrite are the most abundant crystalline phases in Ptolemaida’s and Kardia’s fly ashes. The bottom ashes revealed high percentages of amorphous content (58-64wt%) and anorthite and quartz as the major crystalline phases. Mixtures of different BA/FA ratios were prepared for sintering tests. The sintered mixtures from Kardia’s and Ptolemaida’s regions did not have sufficient mechanical properties for further treatment. The sintercake produced from Megalopolis’ ashes exhibited good mechanical properties and was selected for further study for use as light aggregate raw materials to the lightweight concrete production.
Article Details
- Comment citer
-
Anagnostopoulos, I., Lampropoulou, P., Tzevelekou, T., Stivanakis, V., Kastanaki, A., & Papamantellos, D. (2013). Utilization trials of lignite solid byproducts of West Macedonia and Peloponnesus lignite fired power plants for the production of lightweight aggregates. Bulletin of the Geological Society of Greece, 47(4), 1600–1608. https://doi.org/10.12681/bgsg.10997
- Rubrique
- Ore Geology, Mining Technology and Economic Geology
Ce travail est disponible sous licence Creative Commons Attribution - Pas d’Utilisation Commerciale 4.0 International.
Authors who publish with this journal agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution Non-Commercial License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g. post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (preferably in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
