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Properties of Glass Melting Using Recycled Refused Coal Ore

선탄 경석 재활용 원료를 이용한 유리 용융 특성

  • Lee, Ji-Sun (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center) ;
  • Kim, Sun-Woog (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center) ;
  • Ra, Yong-Ho (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center) ;
  • Lee, Youngjin (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center) ;
  • Lim, Tae-Young (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center) ;
  • Hwang, Jonghee (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center) ;
  • Jeon, Dae-Woo (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center) ;
  • Kim, Jin-Ho (Korea Institute of Ceramic Engineering and Technology, Optic & Display Material Center)
  • 이지선 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 김선욱 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 라용호 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 이영진 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 임태영 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 황종희 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 전대우 (한국세라믹기술원 광.디스플레이소재센터) ;
  • 김진호 (한국세라믹기술원 광.디스플레이소재센터)
  • Received : 2019.08.18
  • Accepted : 2019.10.28
  • Published : 2019.11.27

Abstract

In this study, the glass melting properties are evaluated to examine the possibility of using refused coal ore as replacement for ceramic materials. To fabricate the glass, refused coal ore with calcium carbonate and sodium carbonate in it (which are added as supplementary materials) is put into an alumina crucible, melted at $1,200{\sim}1,500^{\circ}C$ for 1 hr, and then annealed at $600^{\circ}C$ for 2 hrs. We fabricate a black colored glass. The properties of the glass are measured by XRD (X-ray diffractometry) and TG-DTA (thermogravimetry-differential thermal analysis). Glass samples manufactured at more than $1,300^{\circ}C$ with more than 60 % of refused coal ore are found by XRD to be non-crystalline in nature. In the case of the glass sample with 40 % of refused coal ore, from the sample melted at $1,200^{\circ}C$, a sodium aluminum phosphate peak, a disodium calcium silicate peak, and an unknown peak are observed. On the other hand, in the sample melted at $1,300^{\circ}C$, only the sodium aluminum phosphate peak and unknown peak are observed. And, peak changes that affect crystallization of the glass according to melting temperature are found. Therefore, it is concluded that glass with refused coal ore has good melting conditions at more than $1,200^{\circ}C$ and so can be applied to the construction field for materials such as glass tile, foamed glass panels, etc.

Keywords

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