University of Oulu

Yong Lin, Baijun Yan, Qifeng Shu, Timo Fabritius, Synergetic valorization of basic oxygen furnace slag and stone coal: Metal recovery and preparation of glass-ceramics, Waste Management, Volume 135, 2021, Pages 158-166, ISSN 0956-053X,

Synergetic valorization of basic oxygen furnace slag and stone coal : metal recovery and preparation of glass-ceramics

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Author: Lin, Yong1,2; Yan, Baijun1; Shu, Qifeng1,2;
Organizations: 1School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China
2Process Metallurgy Research Unit, University of Oulu, Oulu 90014, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 7.6 MB)
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Language: English
Published: Elsevier, 2021
Publish Date: 2021-11-15


A synergetic valorization method was proposed to convert the basic oxygen furnace (BOF) slag and stone coal into ferroalloy and glass-ceramic in this work. Effects of reduction time, temperature, and the mass ratio of BOF slag to stone coal on the reduction were studied. The reduction mechanism was investigated by in-situ observation and dissolution experiments. The effect of sintering temperature on the properties of glass-ceramics prepared from the final slag was further studied. The in-situ observation results indicate that the reduction reactions occurred mainly in the temperature range of 1673–1793 K. The reduction ratio of oxides and size of metal droplets can be improved by increasing reduction time, temperature, and decreasing stone coal addition. The recovered ferroalloys consisted of Fe, Mn, P, and V, which has the potential of returning to the steelmaking process or extracting vanadium. The modified final slag was suitable material for preparing glass-ceramic. Wollastonite-based glass-ceramic with a maximum bending strength of 95.83 MPa was prepared, which could be applied as abrasion-resistant and building decoration materials. Therefore, the present technological route can convert two kinds of industrial solid waste into two kinds of cleaner products and achieve the target of “zero waste”.

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Series: Waste management
ISSN: 0956-053X
ISSN-E: 1879-2456
ISSN-L: 0956-053X
Volume: 135
Pages: 158 - 166
DOI: 10.1016/j.wasman.2021.08.044
Type of Publication: A1 Journal article – refereed
Field of Science: 215 Chemical engineering
216 Materials engineering
Funding: This work was supported by the National Natural Science Foundation of China, China (No. 51774026, No. 51774025). The author (Yong Lin) would also like to acknowledge the financial support from the China Scholarship Council (CSC202006460042).
Copyright information: © 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (