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The Glass phase Characterization of Coal Ash Slag



Title: The Glass phase Characterization of Coal Ash Slag
Author(s): Hongzhu QUAN, Tanosaki TAKAO
Paper category : conference
Book title: 2nd International Conference on Waste Engineering and Management - ICWEM 2010
Editor(s): J.Zh. Xiao, Y. Zhang, M.S. Cheung and Reuben P. K. Chu
Print-ISBN: 978-2-35158-102-5
e-ISBN: 978-2-35158-103-2
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 378 - 385
Total Pages: 8
Nb references: 2
Language: English


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 discharge coal ash component of complex ashes or glassy molten slag(also called CCP), and the other point of view is that 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 for the new method of determining 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. Therefore, in this study, we promote the new method by optical analysis and acid extraction tests etc. 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.


Online publication: 2011-01-25
Publication type : full_text
Public price (Euros): 0.00