Abstract
Ladle refining is a popular secondary metallurgy process and plays a vital role in achieving the desired chemistry and temperature during steelmaking. The slag produced after ladle refining mostly contains dicalcium silicate (C2S). The presence of high C2S in slag leads to the disintegration of slag into fine powder during cooling due to phase transformation of C2S. The adverse impact is that the dust is easily aerated and carried by wind creating environmental pollution and makes the working area unsafe. In this paper, an attempt was made to study the effect of the addition of different additives on the disintegration of slag. Initial laboratory experiments were conducted with different additives such as Colemanite (boron-based mineral), silica-rich synthetic slag, and a siliceous natural occurring mineral perlite. Analysis of slag samples was carried out before and after treatment with additives. Based on the optimized conditions, industrial trials were conducted with different additives, and its success was measured in terms of lumpy slag formation. It was successfully studied that the addition of 10% of perlite during ladle furnace treatment process helped in preventing the slag disintegration by 90%.
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Yildirim IZ, Prezzi M (2011) Chemical, mineralogical, and morphological properties of steel slag. Adv Civil Eng. https://doi.org/10.1155/2011/463638
Horii K, Tsutsumi N, Kitano Y, Kato T (2013) Processing and reusing technologies for steelmaking slag. Nippon Steel Tech Rep 805:123–129
Qiang J, Jinyin X, Weibo G (1993) A new type of processing and resource application technology for baosteel steel slag. 1–5
Dhoble YN, Ahmed S (2018) Review on the innovative uses of steel slag for waste minimization. J Mater Cycles Waste Manag 20:1373–1382. https://doi.org/10.1007/s10163-018-0711-z
Gollapalli V, Tadivaka SR, Borra CR et al (2020) Investigation on stabilization of ladle furnace slag with different additives. J Sustain Metall 6:121–131. https://doi.org/10.1007/s40831-020-00263-w
Sheshukov OY, Mikheenkov MA, Egiazaryan DK et al (2017) Chemical stabilization features of ladle furnace slag in ferrous metallurgy. KnE Mater Sci 2:59. https://doi.org/10.18502/kms.v2i2.947
Branca TA, Colla V, Valentini R (2009) A way to reduce environmental impact of ladle furnace slag. Ironmak Steelmak 36:597–603. https://doi.org/10.1179/030192309X12492910937970
Yamnova NA, Zubkova NV, Eremin NN et al (2011) Crystal structure of larnite β Ca2 SiO4 and specific features of polymorphic transitions in dicalcium orthosilicate. Crystallogr Rep. 56:210–220. https://doi.org/10.1134/S1063774511020209
Chan CJ, Kriven WM, Young JF (1992) Physical stabilization of the β→γ transformation in dicalcium silicate. J Am Ceram Soc 75:1621–1627. https://doi.org/10.1111/j.1151-2916.1992.tb04234.x
Kim YJ, Nettleship I, Kriven WM (1992) Phase transformations in dicalcium silicate: II, TEM studies of crystallography, microstructure, and mechanisms. J Am Ceram Soc 75:2407–2419. https://doi.org/10.1111/j.1151-2916.1992.tb05593.x
Sakurada R, Singh A K, Briere T M, Uzawa M, Kawazoe Y (2007) Crystal structure analysis of dicalcium silicates by AB initio calculation. 32ndConference on our world in concrete & structures, Singapore
Pontikes Y, Jones PT, Geysen D, Blanpain B (2010) Options to prevent dicalcium silicate-driven disintegration of stainless steel slags. Arch Metall Mater 55:1167–1172. https://doi.org/10.2478/v10172-010-0020-6
Maiti SC, Ghoroi C (2017) Influence of catalytic nano-additive for stabilization of β-dicalcium silicate and its hydration rate with different electrolytes. Cem Concr Res 98:111–121. https://doi.org/10.1016/j.cemconres.2017.04.008
Seki A, Aso Y, Okubo M, Sudo F, Ishizaka K (1986) Development of dusting prevention stabilizer for stainless steel slag. Kawasaki Steel Tech Rep 15:16–21
Cuesta A, Aranda MA, Sanz J, de la Torre AG, Losilla ER (2014) Mechanism of stabilization of dicalcium silicate solid solution with aluminium. Dalton Trans 43:2176–2182. https://doi.org/10.1039/C3DT52194J
Iacobescu RI, Malfliet A, Machiels L, Jones PT, Blanpain B, Pontikes Y (2014) Stabilisation and microstructural modification of stainless steel converter slag by addition of an alumina rich by-product. Waste Biomass Valoriz 5:343–353. https://doi.org/10.1007/s12649-013-9287-y
Kriskova L, Pontikes Υ, Pandelaers L, Cizer O, Jones PT, Van Balen K, Blanpain B (2013) Effect of high cooling rates on the mineralogy and hydraulic properties of stainless steel slags. Metall Mater Trans B 5:1173–1184. https://doi.org/10.1007/s11663-013-9894-9
Durinck D, Arnout S, Mertens G et al (2008) Borate distribution in stabilized stainless-steel slag. J Am Ceram Soc 91:548–554. https://doi.org/10.1111/j.1551-2916.2007.02147.x
Sheshukov OY, Nerkasov IV, Mikheenkov MA et al (2017) Unit ladle-furnace: slag forming conditions and stabilization. KnE Mater Sci 2:70. https://doi.org/10.18502/kms.v2i2.949
Cuesta A, Losilla ER, Aranda MAG et al (2012) Reactive belite stabilization mechanisms by boron-bearing dopants. Cem Concr Res 42:598–606. https://doi.org/10.1016/j.cemconres.2012.01.006
Seki A, Aso Y, Okubo M et al (1986) Development of dusting prevention stabilizer for stainless steel slag. Kawasaki Steel Tech Rep 15:16–21
Acknowledgements
Authors are thankful to the management of TATA Steel to provide all required resources to carry out the research. Authors are also thankful to Dr. S. K. Choudhary and Dr. S. K. Ajmani for their valuable inputs. Also, the authors would like to thank all the shop floor people who helped in getting the insight of process in optimizing the addition time.
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Sahoo, P.P., Nayak, P. & Ranjan, R. Prevention of Ladle Furnace Slag Disintegration Through Different Slag Additives. J. Sustain. Metall. 7, 115–125 (2021). https://doi.org/10.1007/s40831-020-00324-0
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DOI: https://doi.org/10.1007/s40831-020-00324-0