Analysis of the Ash from One Shanghai Plant Using XRD (X-Ray Diffraction)

Abstract:

This study aims to develop a methodology for thermal characterization of APC (air pollution control)fly ash using XRD (X-ray diffraction). It performed XRD analysis as a function of temperature between room temperature and 1200 °C. It is found that major mineralogical components of fly ash involve SiO₂, CaCl₂, Ca₃Si₂O₇, Ca₂SiO₄–0.35H₂O, Ca₉Si₆O₂₁–H₂O, K₂Al₂Si₂O₈–3.8H₂O and AlCl₃–4Al(OH)₃–4H₂O. Glass phases account for around 57%, which is conducive to reduction of energy in recycling of the ash. Salts decompose firstly with increase of temperature and then oxides derived from the decomposition process react with SiO₂, forming silicates, calcium-silicates and aluminosilicates.

• Periodical: Advanced Materials Research (Volume 664)
• Pages: 232-235
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.664.232
• Online since: February 2013
• Authors: Guo Xian Ma, Hai Ying Zhang
• Keywords: APC Ash, Heavy Metal, Leaching Toxicity

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