Elaboration of synthetic slags containing marble waste and aluminum oxide used in steel desulfurization process
DOI:
https://doi.org/10.3989/revmetalm.174Keywords:
Aluminum oxide, Desulfurization, Marble wasteAbstract
The aim of this paper is to investigate the desulphurization process of steel using synthetic slags containing marble waste and aluminum oxide. The tests were performed using a SAE 1020 steel containing 80 ppm of sulfur. The temperature was 1600 °C under an argon flow of 1NL/minute. Each desulfurization test lasted 30 minutes long. Aliquots of steel were removed from the bath every 5 min. Then, each aliquot was characterized by LECO CS240 infrared spectrometer to determine the sulfur content. The results indicated a desulphurization yield up to 78.7 wt% and 70.0 wt% for slags containing aluminum oxide and marble waste, respectively. It was also concluded that the fraction of liquid phase had influence on the desulfurization yield. The maximum desulfurization yield was reached with 83.2 wt% and 82.0 wt% of liquid phase for slags containing aluminum oxide and marble waste, respectively. In addition, in slags containing lime, the maximum desulfurization yield was reached with 85.0 wt% of liquid phase. The tests also demonstrate that in desulfurization processes is necessary containing solid CaO phase in the synthetic slag composition to reach the maximum desulfurization yield. Therefore, the use of aluminum oxide instead fluorspar is an interesting alternate for desulfurization of steel, as well as the replacement of lime for marble waste.
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Alba, M., Jung, S.H., Kim, M.S., Seol, J.Y., Yi, S.J., Kang, Y.B. (2015). Desulfurization of Liquid Steel by Passing Steel Droplets through a Slag Layer. ISIJ Int. 55 (8), 1581-1590. https://doi.org/10.2355/isijinternational.ISIJINT-2015-120
Caceres, P.G., Attiogbe, E.K. (1997). Thermal decomposition of dolomite and the extraction of its constituents. Miner. Eng. 10 (10), 1165-1176. https://doi.org/10.1016/S0892-6875(97)00101-5
Coleti, J.L., Grillo, F.F., Silva, F.L., Oliveira, J.R., Espinosa, D.C.R., Tenório, J.A.S. (2015). Uso do resíduo de mármore e aluminato de cálcio em escórias sintéticas dessulfurantes de aço. Tecnol. Metal. Mater. Min. 12 (3), 188-194. https://doi.org/10.4322/2176-1523.0793
Coleti, J.L., Grillo, F.F., Tenório, J.A.S. (2017). Marble waste recycling and its application in the steel desulphurization process. International Conference on Solid Waste Technology and Management, Philadelphia, pp. 649-656.
Emi, T. (2015). Steelmaking Technology for the Last 100 Years: Toward Highly Efficient Mass Production Systems for High Quality Steels. ISIJ Int. 55 (1), 36-66. https://doi.org/10.2355/isijinternational.55.36
Grillo, F.F., Coleti, J.L., Oliveira, J.R., Junca, E., Deike, R., Espinosa, D.C.R. (2017). Development of synthetic slag with marble waste and calcium aluminate agents for cast iron desulfurization. Mater. Res. 20 (5), 1230-1237. https://doi.org/10.1590/1980-5373-mr-2016-0834
Holappa, L. (1982). Ladle injection metallurgy. International Metals Reviews 27 (2), 53-76. https://doi.org/10.1179/095066082790324388
Ma, W., Li, H., Cui, Y., Chen, B., Liu, G., Ji, J. (2017). Optimization of Desulphurization Process using Lance Injection in Molten Iron. ISIJ Int. 57 (2), 214-219. https://doi.org/10.2355/isijinternational.ISIJINT-2016-167
Nita, O.S., Butnariu, I., Constantin, N. (2010). The efficiency at industrial scale of a thermodynamic model for desulphurization of aluminium killed steels using slags in the system CaO-MgO-Al2O3-SiO2. Rev. Metal. 46 (1), 5-14. https://doi.org/10.3989/revmetalm.0849
Pretorius, E. (2002). Slags and the Relationship with Refractory Life and Steel Production. LWB Refractories.
Putan, A., Putan, V., Heput, T., Socalici, A. (2013). Steel treatment with calcium-aluminate synthetic slag and addition of titanium oxide. Rev. Metal. 49 (1), 31-44. https://doi.org/10.3989/revmetalm.1210
Rosenqvist, T. (1988). Principles of extractive metallurgy. McGraw-Hill, 2nd Ed., EE.UU.
Shimizu, K., Suzuki, T., Jimbo, I., Cramb, A.W. (2001). An Investigation on the Vaporization of Fluorides from Slag Melts. Iron and Steelmaker 28 (7), 87-93.
Taguchi, K., Nakazato, H.O., Nakai, D., Usui, T., Marukawa, K. (2003). Deoxidation and Desulfurization Equilibria of Liquid Iron by Calcium. ISIJ Int. 43 (11), 1705-1709. https://doi.org/10.2355/isijinternational.43.1705
Tong, Z., Ma, G., Cai, X., Xue, Z., Wang, W., Zhang, X. (2016). Characterization and valorization of Kanbara reactor desulfurization waste slag of hot metal pretreatment. Waste Biomass Valori. 7 (1), 1-8. https://doi.org/10.1007/s12649-015-9429-5
Wilson, W.G., Mclean, A. (1980). Desulfurization of Iron and steel and sulfide shape control. Iron & Steel Society - AIME, Warrendale, EE.UU. pp. 3-11.
Xu, J.F., Huang, F.X., Wang, X.H. (2016). Desulfurization Behavior and Mechanism of CaO-saturated. Slag. J. Iron. Steel Res. Int. 23 (8), 784-791. https://doi.org/10.1016/S1006-706X(16)30121-2
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