Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Crystallization Phenomina and Vetrification From a Fly Ash With Large Content of Cl

다량 Cl성분이 함유된 플라이 애쉬로부터 유리화 및 결정화 현상

  • Kim, Jae-Myung (Dept. of Mterials Science and Metallurgical Engineering, Sunchon National University) ;
  • Kim, Hyung-Sun (Dept. of Mterials Science and Metallurgical Engineering, Sunchon National University)
  • 김재명 (순천대학교 재료·금속공학과) ;
  • 김형순 (순천대학교 재료·금속공학과)
  • Published : 2002.12.01
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Abstract

To recycle waste materials, this work was focused on development of glass-ceramic from incinerator fly ash with a large content of Cl and its physical property was evaluated. In the process, water washing as a pre-treatment before melting the fly ash was used to remove large amount of Cl component in the ash and to reduce melting temperature. As a result, glass was obtained at below $100^{\circ}C$ compared to the melting temperature before washing the ash. Also, internal crystallization occurred under single stage heat treatment (at $850-950^{\circ}C$ for 20-340min) without adding other materials into the ash. It was shown that the glass-ceramic was composed of four crystals, diopside, anorthite, akermanite, and unknown phase. Hardness of 8.3GPa was found in the glass-ceramic, which is a high value compared to reported others. Thus, the present process suggests that a good glass-ceramic produced from an incinerator ash could be applicable for structural materials in terms of economic and environmental points.

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Cited by

  1. Production and Properties of Glass-Ceramic from Incinerator Fly Ash vol.439, pp.1662-9752, 2003, https://doi.org/10.4028/www.scientific.net/MSF.439.180