The melting performance of high alumina blast furnace slags
J. Min. Metall. Sect. B-Metall., 59 (1) (2023) 101-111. DOI:10.2298/JMMB220722009Z
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Available online 10 May 2023
(Received 22 July 2022; Accepted 04 March 2023)
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Abstract
With a view to understanding the performance of the blast furnace slag with high Al2O3 content, the effects of w(MgO)/w(Al2O3), w(CaO)/w(SiO2), and w(Al2O3) on the melting performance (melting characteristic temperature and melting heat) of the blast furnace slag with high Al2O3 content were investigated by the differential scanning calorimeter (DSC) method. Experimental results indicate that melting end temperature (Tend) for almost all the slags has no obvious change with the increase of w(MgO)/w(Al2O3), w(CaO)/w(SiO2) and w(Al2O3) of the slag will raise Tend of the slag. When (w(MgO)/w(Al2O3), R, and w(Al2O3) are high, the melting onset temperature (Tonset) of the slag increases with the increase of any variables. When w(CaO)/w(SiO2) is low, Tonset of the slag decreases with the increase of w(Al2O3). w(MgO)/w(Al2O3), w(CaO)/w(SiO2), and w(Al2O3) within the scope of this study and all these factors lead to the increase of the slag melting heat.
Keywords: High alumina blast furnace slag; Melting characteristic temperature; Melting heat; Differential scanning calorimetry; Raman spectrum analysis
Correspondence Address:
H.-Y. Zheng,
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Northeastern University, Shenyang, Liaoning, P. R. China; School of Metallurgy, Northeastern University, Shenyang, Liaoning, P. R. China;
email: zhenghy@smm.neu.edu.cn
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