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A Study on the Characterization of Anthracite Fly Ash for the Fabrication of Calcinated Brick  

Yu Yeon-Tae (전북대학교 공과대학 공학연구원 신소재공학부)
Kim Byoung-Gyu (한국지질자원연구원 자원활용소재연구부)
Choi Young-Yoon (한국지질자원연구원 자원활용소재연구부)
Nam Chul-Woo (한국지질자원연구원 자원활용소재연구부)
Lee Yeng-Seok ((주)대평세라믹스산업)
Kim Cheon-Sun ((주)대평세라믹스산업)
Publication Information
Resources Recycling / v.13, no.2, 2004 , pp. 16-23 More about this Journal
Abstract
To increase the recycling rate of anthracite fly ash, the properties of anthracite fly ash were compared to that of bituminous fly ash. Especially, the high temperature properties of the fly ash are investigated by using thermal analysis, high temperature microscope and X-ray diffraction analysis for utilizing anthracite fly ash to prepare the calcinated bricks. The average ratio of $A1_2$$O_3$/$SiO_2$ for anthracite is 0.62 and the ratio for bituminous is 0.34. The content of $SiO_2$ in anthracite fly ash was higher than that of bituminous fly ash. The $A1_2$$O_3$ of anthracite fly ash reacted with the $A1_2$$O_3$ in the fly ash and formed new mullite crystal at over $1000^{\circ}C$, so anthracite fly ash showed high fire resistance. And, the fly ash mixtures having kaolin were prepared, and then extruded in vacuum to evaluate the extruding property of anthracite fly ash mixture. The extruding velocity was decrease with increasing the addition amount of fly ash in the mixture, and the maximum addition amount of fly ash that could be extruded was 60 wt%.
Keywords
Anthracite; Bituminous; Coal Fly ash; High temperature property; extrusion;
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