Articles
  • Preparation of decorative slag glass-ceramics and research on the solidification of heavy metals

  • Yang Tanga, Xiaodong Haoa, Zhenxiang Fanga, Xinyu Baia, Guangyu Wanga, Hongxia Zhanga, Leibo Denga, Hua Chena,b, Ming Zhaob and Yongsheng Dua,b,*

  • aCollege of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China
    bCollaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Glass-ceramics with different CuO additions were prepared with Fe2O3 and Cr2O3 as composite nucleating agents, rare earth-containing blast furnace slag (REBFS) as the main raw material. The existence state and stability of heavy metals Cu, Mn and Cr in glass-ceramics were investigated. The results showed that Cr ions contributed to the generation of spinel phase, while Cu ions and Mn ions can enter the spinel crystal and exist stably, which indicated that there was a synergistic solidification of Cu, Mn and Cr. The depolymerization effect of the copper ions contributed to the transformation of the crystal morphology from dendrites to spherulites. Moreover, the increase in CuO contents promoted glass-ceramics from green to copper red. Based on the leaching experimental data analysis of heavy metals in glass-ceramics, the leaching concentration of heavy metals Cu, Cr and Mn were much lower than the standard leaching toxicity limit of hazardous waste (GB5085.3–2007, China). The results showed that the conversion of REBFS into environmentally friendly glass-ceramics can realize solid waste resource utilization


Keywords: REBFS, Glass-ceramics, Heavy metals, Leaching characteristics, Colourisation

This Article

  • 2023; 24(1): 58-68

    Published on Feb 28, 2023

  • 10.36410/jcpr.2023.24.1.58
  • Received on Jun 14, 2022
  • Revised on Aug 17, 2022
  • Accepted on Sep 3, 2022

Correspondence to

  • Yongsheng Du

  • aCollege of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China
    bCollaborative Innovation Center of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia University of Science and Technology, Baotou 014010, China
    Tel : +86-472-5954358 Fax: +86-472-5954358

  • E-mail: dys1111@imust.edu.cn