2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 11: Recycling & Environmental
| Editors: | Kongoli F, Havlik T, Pagnanelli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 410 pages |
| ISBN: | 978-1-987820-34-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
< CD shopping page
The Producing Glass Ceramics Materials for Upcycling of Steel Industry Slags and Power Plant Waste
Gu-Seul Back1; Woo-Gwang Jung1;1KOOKMIN UNIVERSITY, Seoul, Korea (Republic of [South] Korea);
Type of Paper: Regular
Id Paper: 244
Topic: 7
Abstract:
The steel industry slags including Blast Furnace (BF) slag and Ferro nickel alloy (SNNC) slag were used to produce the glass-ceramics based on SiO2-(CaO+MgO)-Al2O3 system, which can be used for high strength and anti-wear materials. Six samples of different composition were prepared by mixing starting resources with prescribed ratio, casting and heat treatment. To investigate the effect of composition on the properties and crystallization mechanism of material, the characterization was made with XRD, DSC, measurement of compressive strength and micro hardness. XRD results showed that three different phases, anorthite, diopside and gehlenite, were the main phases of the material. Diopside was formed in every sample, but anorthite was formed in SiO2 rich material, and gehlenite in CaO rich material, respectively. DSC analyses indicated that the glass material has glass transition point around 973~993K, undergoes crystallization around 1073~1173K, and melts around 1447K. The crystallization temperature has increased as the content of Fe oxide decreased. By changing the heat treatment pattern with multiple steps, anorthite phase has formed more, and various phases were generated in the present experimental condition. It is expected that Fe oxide works as a nucleating agent. By changing heat treatment pattern, more various phases could be formed, and anorthite phase was formed more. Also, thermodynamic simulation was made with FactSage to simulate stable phases in glass-ceramics material. Additionally, viscosity and latent heat of liquid glass-ceramics materials will be discussed.