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Title

Aluminosilicates transformations in combustion followed by DSC

AuthorsMayoral Gastón, María del Carmen ; Izquierdo Pantoja, María Teresa ; Andrés Gimeno, José Manuel ; Rubio Villa, Begoña
KeywordsSlagging
DSC
Mullite
Issue Date15-Jan-2001
PublisherElsevier
CitationThermochimica Acta 373: 173-180 (2001)
AbstractThe behavior of quartz, kaolinite and calcite, as main components of coal mineral matter, has a direct impact on slags formations and development in pulverized coal combustion. The mineral transformations along temperature can be followed by differential scanning calorimetry (DSC), provided that the formation and crystallization of mullite (3Al2O3·2SiO2) are exothermic phenomena. Peak heights and areas allow to quantify the occurrence and extent of those mineral transformations for pure kaolinite and its mixture with calcite as fluxing agent. On the other hand, sinterization time at temperatures bellow mullite formation has a clear impact on the onset and the shape of the peaks. In this way, it is demonstrated that mineral transformations at solid state have a direct effect on the final structure of mineral species generated by slagging.
Publisher version (URL)https://doi.org/10.1016/S0040-6031(01)00459-2
URIhttp://hdl.handle.net/10261/168072
DOI10.1016/S0040-6031(01)00457-9
ISSN0040-6031
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