| [Solid and liquid wastes from industrial processes: Innovations in material recovery and environmental protection] Potential of briquetting in sustainable recycling of residues in steel industry Potential of briquetting in sustainable recycling of residues in steel industry Elsayed Mousa1; 1SWERIM AB, Luleå, Sweden; PAPER: 147/Recycling/Regular (Oral) SCHEDULED: 16:45/Sat. 26 Oct. 2019/Ambrosia A (77/RF) ABSTRACT: Iron and steel making is accompanied by generations of various types of by-products and waste materials which usually need some pre-treatment to be usable [1]. The resource efficiency, environmental, and economic benefits are vital keys to motivate the re-circulation of steel mill residues and recovery of their associated minerals as far as possible to save the virgin resources and reduce material sent to landfills. Nowadays, the steel industry pays more attention to adopt a circular economy model to reach zero waste through reuse and recycling of all by-products. In this context, briquetting can play an important role in residues re-circulation in the steel industry and circular economy [2-5]. The developed briquettes should have adequate chemical composition and mechanical strength to be suitable for usage in iron and steel production units [6, 7]. In the present study, the residues rich with lime and metallic iron are selected for developing briquettes suitable for basic oxygen furnace (BOF) implementation. The briquetting is performed with binders which have low sulfur content to enhance the recycling efficiency. Various recipes are designed and produced using lab scale hydraulic press and pilot scale roller press. The mechanical strength of the developed briquettes is evaluated using cold compression strength device and drop test. The potential of the developed briquettes on saving lime and scrap will be addressed. The gained knowledge can contribute to the enhancement of residues re-circulation in other metallurgical sectors. References: [1] Fact Sheet- Steel Industry by-products; https://www.worldsteel.org/en/dam/jcr:1b916a6d-06fd-4e84-b35d-c1d911d18df4/Fact_By-products_2016.pdf; [accessed on 18 January 2018]. [2] L. Sundqvist, K.O. Jonsson, H.O. Lampinen, L.E. Eriksson: Committee on Raw Materials-Seminar, Proc. International Iron and Steel Institute (IISI), (1999), Brussels. [3] K. Kundvist, M. Braimming, J. Riesbeck, A. Wedholm: New methods for waste minimization in an integrated steel site; Chem. Eng. Trans. (2015), No. 45, 739-44. [4] S. Maneesh: Studies on the cement bonded-briquettes of iron and steel plant by-products as burden material for blast furnaces (2002) PhD thesis, Chemical and Metallurgical Engineering/Process Metallurgy, Luleå University of Technology. ISRN: LTU-DT-02/50-SE. [5] A. Andersson, M. Andersson, E. Mousa, A. Kullerstedt, H. Ahmed, B. Bjairkman, L. Sundqvist-Aikvist: The potential of recycling the high-zinc fraction of upgraded BF sludge to the desulfurization plant and basic oxygen furnace; Metals (2018), No. 8, 1-13. [6] C. Coenraets, J. Banchet: Binder-free compaction: a new technology to enhance efficient recycling of by-products, 8th European Oxygen Steelmaking Conference, 10-12 October 2018, Taranto, Italy. [7] E.A. Mousa, H.M. Ahmed, C. Wang: Novel approach towards biomass lignin utilization in ironmaking blast furnace; ISIJ Int. 57 (2017), No. 10, 788-1796. |
