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Gamze Öztürk, BSc. Student 

Metallurgical and Materials Engineering

Yıldız Technical University

 

gamze@gmail.com

www.linkedin.com/in/gamze/

 

Basic Oxygen Furnace Slag: A Sustainable Approach to SiO2 -Na2O-B2O3 -CaO-Al2O3-F Glass-Ceramic Coatings Production

Co-Supervisors: İremnur Ceylan

Basic oxygen furnace (BOF) uses a pure oxygen gas injected into the molten metal causing the impurities to oxidize, hence BOF slag is obtained using a combination of flux and these impurities [1]. According to World Steel Association, basic oxygen furnace (BOF) slag production was estimated to be 126 kg per ton of steel on average, causing serious environmental pollution [2]. In this study aim to develop sustainable SiO2-Na2O-B2O3-CaO-Al2O3-F-K2O-BaO-Fe2O3-P2O5-MnO-CoO-CuO glass-ceramic coating production to achieve a circular economy by incorporation of  BOF slag. Glass-ceramic coatings are a combination of parent glass and randomly oriented submicrometric final crystals which are obtained by controlled heat treatment process of glass system with main constituents such as glass modifier, glass intermediate, glass former and adhesion and nucleation agents [3,4]. A standard glass ceramic coating and ~5% by weight the composition containing BOF slag was prepared and compared was compared in terms microstructure, chemical, mechanical, morphological, phase, thermal properties. Furthermore, BOF slag was evaluated in terms of raw material criteria utilized in the production of glass-ceramic coatings such as applicability, composition, structural integration. According to the characterizations test, use of BOF can be a successful sustainable instead of commercial raw materials.

 

[1]      K. Horii, N. Tsutsumi, Y. Kitano, and T. Kato, “Processing and reusing technologies for steelmaking slag,” Nippon Steel Tech. Rep., vol. 805, no. 104, pp. 123–129, 2013.

[2]      W. S. Association, “Steel industry co-products,” © World Steel Assoc., 2020, doi: 10.1201/9781420003840-24.

[3]      A. Majumdar and S. Jana, “Glass and glass-ceramic coatings, versatile materials for industrial and engineering applications,” Bull. Mater. Sci., vol. 24, no. 1, pp. 69–77, 2001, doi: 10.1007/BF02704843.

[4]      G. A. Khater, E. M. Safwat, J. Kang, Y. Yue, and A. G. A. Khater, “Some Types of Glass-Ceramic Materials and their Applications,” Int. J. Res. Stud. Sci. Eng. Technol., vol. 7, no. 3, pp. 2349–476, 2020.