Study on viscous flow characteristics of CaO-SiO2-MgO-Al2O3-TiO2-CaCl2 slag system
The viscous flow characteristics of slag are closely related to the stability of the blast furnace.In this paper,the viscosity and melting temperature of chlorine-containing high-titanium slag(CaO-SiO2-MgO-Al2O3-TiO2-CaCl2)were studied,and their structural evolution was analyzed by Fourier transform infrared spectroscopy(FTIR)and Raman spectroscopy.The results show that the addition of chlorine element can reduce the viscosity of the slag and simplify the structure of the slag.Due to the easy evap-oration of chlorine element at high temperature,the chlorine content decreased slightly during the vis-cosity test.The variation trend of viscous flow activation energy is similar to that of viscosity.The[SiO4]-tetrahedral structure and Ti-O-Ti/Si bonds are also broken.The relative area fractions of the Q2 and Q3 units decreased and the relative area fractions of the Q0 and Q1 units increased,resulting in a de-crease in the degree of slag polymerization.
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