Thermal Stability and Leaching Behavior of Alkali-Activated Slag Doped with Electric Arc Furnace Dust

Authors

  • Nebojša Tadić University of Montenegro, Faculty of Metallurgy and Technology, Džordža Vašingtona bb, 81000 Podgorica, Montenegro.
  • Snežana Brašanac-Vukanović University of Montenegro, Faculty of Metallurgy and Technology, Džordža Vašingtona bb, 81000 Podgorica, Montenegro.
  • Irena Nikolić University of Montenegro, Faculty of Metallurgy and Technology, Džordža Vašingtona bb, 81000 Podgorica, Montenegro.
  • Vuk V. Radmilović University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11000 Belgrade, Serbia.
  • Velimir R. Radmilović Serbian Academy of Science and Arts, Kneza Mihaila 35, 11000 Beograd, Serbia.

Abstract

The study presented in this paper explores the simultaneous valorization of electric arc furnace slag (EAFS) and electric arc furnace dust (EAFD) through an alkali activation process, as well as the thermal stability of the resulting product. Moreover, environmental fingerprints of alkali activated slag doped with EAFD, before and after thermal treatment, were evaluated. The results demonstrated the feasible alkali activation of EAFS in the presence of EAFD yielding a product that met the criteria which enables its application in a civil engineering at ambient and at elevated temperatures (1000 ºC). Moreover, the EN12457-2 leaching test results, demonstrated that unheated alkali-activated slag with addition of 5% EAFD met the criteria for disposal at non-hazardous landfills as per European Directive 2003/33/CE. However, environmental fingerprints of alkali activated slag with 5% EAFD after heating to 1000 °C, is of concern since chromium release exceeded the permissible concentration requiring disposal in hazardous waste landfills.

Downloads

Published

2025-09-16

Issue

Vol. 57 No. 3 (2025)

Section

Articles