Abstract
In order to reflect the ability of comprehensive dealkalization and desulfurization of BF slag more accurately, the K2S capacity was proposed. The effects of w(CaO)/w(SiO2), w(MgO) and w(Al2O3) on the ability of comprehensive dealkalization and desulfurization were studied at 1773 K using gas-slag equilibrium techniques. The results showed that with an increase of w(CaO)/w(SiO2), the comprehensive desulfurization and dealkalization capacity of BF slag increases firstly and then decreases. When w(CaO)/w(SiO2) is 1.0, the \({\text{C}}_{{{\text{K}}_{ 2} {\text{S}}}}\) reaches the maximum value. As w(MgO) increases with w(CaO)/w(SiO2) constant, the \({\text{C}}_{{{\text{K}}_{ 2} {\text{S}}}}\) of BF slag increases firstly and then decreases. When w(MgO) is 10.58%, the \({\text{C}}_{{{\text{K}}_{ 2} {\text{S}}}}\) reaches the maximum value. As w(MgO) increases with [w(CaO) + w(MgO)]/w(SiO2) constant, the \({\text{C}}_{{{\text{K}}_{ 2} {\text{S}}}}\) of BF slag decreases. The use of MgO instead of CaO can deteriorate the comprehensive desulfurization and dealkalization capacity. With an increase of w(Al2O3), the \({\text{C}}_{{{\text{K}}_{ 2} {\text{S}}}}\) of BF slag increases firstly and then decreases. When w(Al2O3) is 15.1%, the \({\text{C}}_{{{\text{K}}_{ 2} {\text{S}}}}\) reaches the maximum value. It is suggested that w(CaO)/w(SiO2) remains at about 1.0 in blast furnace production, w(MgO) is maintained at about 10.58%, and w(Al2O3) is maintained at about 15.1%.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Yu S, Zhao H, Cheng S, and Pan H W, J Iron Steel Res 23 (2011) 20.
Zhao H, and Cheng S, J Univ Sci Technol Beijing 34 (2012) 333.
Shankar A, Gornerup M, Seetharaman S, and Lahiri A K, Metall Mater Trans B 37 (2006) 941.
Li K, Zhang J, Barati M, Khanna R, Liu Z, Zhong J, Ning X, Ren S, Yang T, and Sahajwalla V, Fuel 1 (2015) 202.
Wang C, Lyu Q, Zhang S, and Fumin L, J Univ Sci Technol Beijing 13 (2006) 213.
Lyu Q, Li F, Gu L, and Hou D. J Northeast Univ (Nat Sci) 28 (2007) 1590.
Wang C, Lyu Q, Ma M, Liu S, and Hou D. Iron Steel 41 (2006) 15.
Hebei United University. A method for evaluating comprehensive dealkalization and desulphurization capacity of blast furnace slag. China invention patent, ZL2011101929168, 2013-07-03.
Nzotta M M, Nilsson R, and Sichen D, Ironmak Steelmak 24 (1997) 300.
Simeonov S R, Sridhar R, and Toguri J M, Metall Mater Trans B 26B (1995) 325.
Tang X, Xu C, ISIJ Int 35 (1995) 367.
Liang Y, and Che Y, Handbook of Inorganic Thermodynamics Data. Shenyang: Northeastern University Press.
Zhang S, Mu H, Sun Y, and Lyu Q, Iron Steel 47 (2012) 14.
Zhang X, Lyu Q, Liu X, and Qie Y. Iron Steel Vanadium Titan 36 (2015) 64.
Peng Q, Chen B, Peng J, and Zhao L. J Res Iron Steel 34 (2006) 10.
Dong X, Zhang S, Lan C, and Lyu Q. Iron Steel Vanadium Titan 37 (2016) 99.
Gudenau H W, Johann H P, and Meimeth S, Stahl und Eisen (1996) 89.
Sunahara K, Nakano K, Hoshi M, Inada T, Komatsu S, and Yamamoto T, ISIJ Int 48 (2008) 420.
Acknowledgement
The authors are grateful for financial support from the Key Program of the National Natural Science Foundation of China (U1360205), the North China University of Science and Technology Distinguished Youth Scholars Fund (JP201508).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lan, C., Lyu, Q., Liu, X. et al. Comprehensive Desulfurization and Dealkalization Capacity of Blast Furnace Slag. Trans Indian Inst Met 71, 2243–2249 (2018). https://doi.org/10.1007/s12666-018-1355-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12666-018-1355-3