화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.22, 110-119, February, 2015
DOI10.1016/j.jiec.2014.06.031  Export Citation
The crystalline and microstructural transformations of two coal ashes and their quenched slags with similar chemical compositions during heat treatment
Yong Jiang1, 2, Keiko Ideta1, 3, Jandee Kim1, 3, Jin Miyawaki1, 3, Doo-Hwan Jung4, Seong-Ho Yoon1, 4, †, and Isao Mochida5
  • 1Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
  • 2School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology, Luoyang 471003, China
  • 3, Japan
  • 4Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
  • 5Research and Education Center of Carbon Resources, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
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The crystalline and microstructural transformations of two laboratory ashes and their quenched slags (froma gasifier) with similar chemical compositions (one with high silicon dioxide (SiO2) concentrations and the other with high aluminum oxide (Al2O3) concentrations)were systematically characterized using X-ray diffraction, multinuclear solid-state nuclear magnetic resonance, and a high-temperature viscometer. The results show that the content of SiO2 and Al2O3 in ash has significant influence on the crystal types and size of cristobalite clusters in the liquid slag during heat treatment. Consequently, the formed cristobalite clusterswas the crucial to the viscosities and rheological properties of liquid slags.
Keywords:Rheological properties;Local structure;Laboratory ash;Quenched slag;Solid-state NMR
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