Relation entre une cendre volante
silico-alumineuse et son charbon
Abstract:
The fly-ashes are typical complex
solids which incorporate at the same time intrinsic properties with the layers
(spectra mineralogical and dimensional spectra varied) and major
transformations generated by the processes of development. To use fly-ashes in
various applications, it is initially necessary to carry out a complete
characterization of those. The first research to date carried out on the
silico-aluminous fly-ashes in order to characterize them from the point of view
physical, morphological, chemical and mineralogical resulted in saying that
they are materials of a relative simplicity. To make this study, a
silico-aluminous fly ash coming from the power station of Albi was selected.
Heat treatments (450°C and 1200°C) made it possible to simulate the treatment
undergone by coal in the power stations in order to be able to identify the
residues. The diversity of the particles contained in ash could be explained by
the relation existing between a fly ash and its coal of origin.
poudres & grains 15 (3), 35-46 (octobre 2005)