Abstract
The chemical variation of central North American lignite fly ash can be compared using the major and minor oxide analyses and the distribution pattern of the inter-grain chemistries of the individual fly ash particles. AAS and electron microprobe chemical analysis of nineteen fly ashes have been used to illustrate the variations in bulk sample and individual grain chemistry. This information documents the chemical variability of the lignite fly ashes by geographic region. There is a direct relationship between grains rich in SiO2 and Al2O3 and in the Na2O content of the grains in lignite derived fly ashes. There is also a direct relationship between grains rich in CaP and the MgO and SO3 content of the grains in lignite derived fly ashes.
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Stevenson, R.J., Collier, J.C., Crashell, J.J. et al. Characterization of North American Lignite Fly Ashes I. Chemical Variation. MRS Online Proceedings Library 113, 87–98 (1987). https://doi.org/10.1557/PROC-113-87
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DOI: https://doi.org/10.1557/PROC-113-87