Abstract
Steelmaking plants in Taiwan using basic oxygen processes generate over a million tons of basic oxygen furnace slag (BOFS) annually. The slag contains free CaO and f-CaO, which are characterized by high pH values and high expansion rates, thus significantly compromising the potential of the slag for resource reuse. Various techniques have been adopted in attempts to stabilize the slag, but none have been effective in terms of completely depleting the f-CaO, leaving the slag unusable and raising serious waste disposal issues. This research explores the effects of the immersion method on the stabilization process for BOFS in a series of experiments. Results show that even long periods of immersion fail to produce complete f-CaO depletion, and indicate that the slag’s porous and closed microstructure may be the cause of this problem. SEM and EDS analysis on slag cross-sections verify that the f-CaO is partially covered by metals, such as Fe and Mn, or other compounds, such that stabilizing processes are only able to partially degrade the f-CaO content.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Yang, G.-Y. (1992). Furnace slag resource. The past and future of furnace slag utilization in the China Steel Corp. Technology and Training, 17(1), 31–46 (Kaohsiung).
Huang, C.-L. (1986). Application of furnace clinker and fly ash in concrete engineering. Taipei: Taipei Construction.
CIMME. (1986). Introduction to ferrous metallurgy. Ferrous Metallurgy, 1.
Shi, T.-H. (1992). Utilization of metallurgical slag. Mining Technology (pp. 266–267). Sichuan, China.
Li, C.-H., Wang, C.-C., & Li, T.-H. (2002). Expansion of basic oxygen furnace slag (pp. 219–245). Collection of Public Engineering Conference Dissertations.
Koide, H. (1993). Research on using BOF slag for road construction. Nakayama Steel Works Technical Report, Osaka, Japan.
Wang, C.-C. (2005). Using BOF slag as a base material and its engineering attributes. Graduate Institute of Civil Engineering, National Cheng Kung University, Tainan, Taiwan.
Motzh, G. J. (2001). Products of steel slag—An opportunity to save natural resources. Waste Management, 21(3), 285–293.
Li, C.-H. (1992). Study on the solutions to repress expansion of BOF slag supplied by China Steel Corp. Graduate Institute of Civil Engineering, National Cheng Kung University, Tainan, Taiwan.
Chiang, B.-C. (1993). Physical properties of active carbon and its absorbency to VOCs. Industrial Pollution Prevention, 58.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer International Publishing Switzerland
About this paper
Cite this paper
Huang, DY., Ke, SL., Chang, CK., Hsu, CM. (2014). Expedited Stabilization of Furnace Slag Produced from Basic Oxygen Steelmaking. In: Juang, J., Chen, CY., Yang, CF. (eds) Proceedings of the 2nd International Conference on Intelligent Technologies and Engineering Systems (ICITES2013). Lecture Notes in Electrical Engineering, vol 293. Springer, Cham. https://doi.org/10.1007/978-3-319-04573-3_12
Download citation
DOI: https://doi.org/10.1007/978-3-319-04573-3_12
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-04572-6
Online ISBN: 978-3-319-04573-3
eBook Packages: EngineeringEngineering (R0)