Valorization of Finnish mining tailings for use in the ceramics industry
| Autor: | Arnold Ismailov, Marjaana Karhu, Soili Solismaa, Mirja Illikainen, Harisankar Sreenivasan, Paivo Kinnunen, Marja Liisa Räisänen, Marja Lehtonen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0211 other engineering and technologies
ta1171 utilization 02 engineering and technology Mining tailings utilization geopolymer phosphate ceramics chemically bonded ceramics mullitization sintered bonded ceramics tailings minerals mineralogy geochemistry Mining engineering 021105 building & construction tailings minerals geopolymer chemically bonded ceramics phosphate ceramics geochemistry lcsh:QE1-996.5 mullitizat Geology 021001 nanoscience & nanotechnology Mining tailings Tailings sintered bonded ceramics Geopolymer lcsh:Geology mining tailings mineralogy 0210 nano-technology mullitization |
| Zdroj: | Bulletin of the Geological Society of Finland, Vol 90, Iss 1, Pp 33-54 (2018) Solismaa, S, Ismailov, A, Karhu, M, Sreenivasan, H, Lehtonen, M, Kinnunen, P, Illikainen, M & Räisänen, M L 2018, ' Valorization of Finnish mining tailings for use in the ceramics industry ', Bulletin of the Geological Society of Finland, vol. 90, pp. 33-54 . https://doi.org/10.17741/bgsf/90.1.002 |
| ISSN: | 1799-4632 0367-5211 |
| DOI: | 10.17741/bgsf/90.1.002 |
| Popis: | The present study valorized Finnish mining tailings waste to identify opportunities for the use of ceramics technologies. On the basis of their mineralogical and chemical contents, the five selected tailings wastes represented felsic mining tailings (FMT) rich in quartz and alkali feldspars, mining tailings dominated by Mg- and Fe-bearing minerals (MgFeMT), and mining tailings rich in carbonate minerals (CMT). Preliminary pilot studies indicated that the FMT materials are potential secondary raw materials for mullite-type ceramics. An Al additive was needed, since the Al₂O₃ content of the studied tailings was too low for mullitization. In addition, carbonate-bearing tailings with Ca silicates can be applicable for chemically bonded phosphate ceramic (CBPC) synthesis. Based on a literature review, FMT are viable source materials for the production of geopolymers, but a high initial Si:Al ratio (in quartz-rich FMT) may lead to partial geopolymerization. Preliminary results from the geopolymerization of pre-heated phlogopite mica mixed with metakaolin gave promising findings, with the formation of a geopolymer having good compressive strength. The findings support the viability of MgFeMT materials rich in phlogopite mica for the production of alkali-activated ceramics |
| Databáze: | OpenAIRE |
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