Development of CaO-rich blast furnace slag containing fluorine mica-based glass ceramic coatings


Ceylan İ., Gökdemir H., Cengiz T., ÇİÇEK B.

Ceramics International, vol.47, pp.29988-29994, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 47
  • Publication Date: 2021
  • Doi Number: 10.1016/j.ceramint.2021.07.173
  • Title of Journal : Ceramics International
  • Page Numbers: pp.29988-29994
  • Keywords: Sustainable manufacturing, Waste disposal, Blast furnace slag, Frit, Glass ceramic coating, CRYSTALLIZATION

Abstract

© 2021 Elsevier Ltd and Techna Group S.r.l.In the present study, Blast Furnace Slag (BFS) waste was evaluated as a sustainable, cost-effective CaO, SiO2, Al2O3 and MgO substitute for inorganic oxides for the production of frit, a raw material for glass ceramic production. Two different frits were prepared to compare a commercially available frit (F-STD) with frit produced using BFS waste (F-BFS). The samples were characterized by XRF, XRD, heating microscopy, dilatometry and TG-DTA to determine the chemical composition, phase formation and thermal properties. The frits were applied on steel using the electrostatic spray method and subsequently thermally treated at 830 °C for 4.5 min. The reference (GC-STD) and partially BFS-substituted glass ceramic (GC-BFS) coatings were examined by XRD, SEM-EDS and ICP-MS experiments. The main crystal phase for both samples was Ni-substituted fluorine mica (KLiNi2Si4O10F2). GC-BFS was slightly more amorphous (70%) than GC-STD (69.1%), which was correlated with the thermal properties of the BFS waste. Likewise, ICP-MS analysis after a boiling citric acid test (ISO 28706-1: 2008) revealed that the GC-BFS had relatively higher chemical resistance. The total release from the reference sample (GC-STD) was 23.556 mg/L, whereas the total release from the sustainably produced sample (GC-BFS) was 21.451 mg/L, which was consistent with the XRD results.