Study on Phase Transformation and Desulfurization Ability during Refining with Flux Additions of B2O3 and CaF2 into CaO-Based Desulfurizer
Vol 2, Issue 2, 2019
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Abstract
CaF2 aids melting and desulfurization, but can also cause environmental pollution. Thus, it has become important to discuss the phase transformation and find a substitute for CaF2. A CaO-based desulfurizer with various flux additions of B2O3 and CaF2 is investigated during the refining process. The purpose of this study is to discuss the phase transformation and desulfurization ability and during refining with B2O3 and CaF2 using a high frequency furnace. Experimental results indicate that the melting temperature of CaO-Al2O3-SiO2 series desulfurizer becomes lower when more B2O3 and less CaF2 are added. On the other hand, the desulfurization ability can be affected within 15 min when various proportions of B2O3 and CaF2 areadded. The desulfurization ability is better with a high content of B2O3 desulfurizer within a 15 min period. However, the desulfurization ability is not affected by the proportion of B2O3 and CaF2 for a long melting period (30 min).
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1. Wang H, Li G, Li B, et al. Effect of B2O3 on melting temperature of CaO-based ladle refining slag. Journal of Iron and Steel Research International 2010; 17(10): 18–22.
2. Hong X, Zheng Q, Jiang G, et al. In: Kanagy DI (editor). Proceeding of 84th Steelmaking Conference; 2001 Mar 25–28; Baltimore, Maiyland. Association for Iron & Steel Technology; 2001. p. 715.
3. Chen YL, Chang JE, Shih PH, et al. Reusing pretreated desulfurization slag to improve clinkerization and clinker grindability for energy conservation in cement manufacture. Journal of Environmental Management 2010; 91(9): 1892–1897.
4. El-Mahllawy MS. Characteristics of acid resisting bricks made from quarry residues and waste steel slag. Construction and Building Materials 2008; 22(8): 1887–1896.
5. Durinck D, Engström F, Arnout S, et al. Hot stage processing of metallurgical slags. Resources, Conservation and Recycling 2008; 52(10): 1121–1131.
6. Kuo YM, Huang KL, Wang CT, et al. Effect of Al2O3 mole fraction and cooling method on vitrification of an artificial hazardous material. Part 1: Variation of crystalline phases and slag structures. Journal of Hazardous Materials 2009 169(1–3): 626–634.
7. Das B, Prakash S, Reddy PSR, et al. An overview of utilization of slag and sludge from steel industries. Resources, Conservation and Recycling 2007; 50(1): 40–57.
8. Li HJ, Suito H, Tokuda M. Proc. 1st. Int. Conf. on Processing Materials for Properties, 1993. ISIJ international 1995; 35(9): 1079–1088.
9. Nakai Y, Kikuchi N, Iwasa M, et al. Development of slag recycling process in hot metal desulfurization with mechanical stirring. Steel Research International 2009; 80(10): 727–732.
10. Hino M, Kitagawa S, Ban-Ya S. Sulphide capacities of CaO-Al2O3-SiO2Slags. Tetsu-to-Hagané 1993; 79(1): 34–40.
11. Sutcu M, Akkurt S. Utilization of recycled paper processing residues and clay of different sources for the production of porous anorthite ceramics. Journal of the European Ceramic Society 2010; 30(8): 1785–1793.
12. Yu X, Shi Q, Zhai R, et al. Influence of B2O3 on melting haracteristics of CaO-Al2O3-SiO2-MgO-CaF2 pentary slag series. Special Steel 2006; 27(4): 5–7.
DOI: https://doi.org/10.24294/ace.v1i2.428
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