The Glass Phase Characterization of Coal Ash Slag

Abstract:

In recent years, coal power generation are strongly desired lower environmental burden, emissions of SOx, NOx, and CO₂ are reduced to the level. Since high efficiency of combustion or gasification systems are discharges coal ash component of complex ashes or glassy molten slag(what is CCP), and the other point of view these CCPs are expected to be effectively used for sustainable development as component for civil engineering etc. Using the CCPs for civil engineering work, Pozzolanic reactions are very important character with hydration materials, but to measure Pozzolanic reaction by mortar test is necessary to wait very long term, waiting the new method of determine the Pozzolanic reactions. So, chemical and mineralogical investigations were carried out on these inorganic materials. The glass phase which was formed by quenching is difficult to characterize by X-ray analysis by every CCP, and discussed only how percentage of glass phases, without not good explanation of CCP reactions in each steps. So in this study, we promote the new method by optical analysis and acid extraction tests etc. In this study, three phases are distinguished, such as glass I, glass II, and crystal phase. Glass I has low flux compositions, and glass II has high flux compositions which makes the basic character of Class C ash in ASTM and Chinese GB standards.

• Periodical: Advanced Materials Research (Volume 580)
• Pages: 473-476
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.580.473
• Online since: October 2012
• Authors: Hong Zhu Quan
• Keywords: CCP, Coal Ash, Glass, Mineralogical Characterization, Pozzolanic Reaction, Slag

References

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DOI: 10.2174/1874149501105010124

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