Effect of TiO₂ on Viscosity and Sulfide Capacity of Blast Furnace Slag Containing Barium

Viscosity and structure evolution of bearing‐BaO slag melt with the low CaO/SiO2 mass ratio of 0.7

“…The optical basicity values of pure oxides are listed in Table 2. The results indicated that the corrected optical basicity was lower than optical basicity of present slag, which was consistent with the previous work 11 . The corrected optical basicity increased gradually with the BaO content increasing from 0 wt.% to 5.0 wt.%, which agreed well with the variations of viscosity in present work.…”

“…The results indicated that the corrected optical basicity was lower than optical basicity of present slag, which was consistent with the previous work. 11 The corrected optical basicity increased gradually with the BaO content increasing from 0 wt.% to 5.0 wt.%, which agreed well with the variations of viscosity in present work. However, for the slag with the CaO/SiO 2 ratio more than 1.0, the calculated optical basicity was contradictory to changes of slag viscosity as a function of BaO.…”

“…With the BaO content rising, the relative fraction of [AlO 4 ] units gradually reduced from 50.5% to 44.8%, whereas a rising trend for [AlO 5 ] and [AlO 6 ] units from was observed although Ba 2+ could help to improve the stability of [AlO 4 ] units. 11 This phenomenon indicated that the addition of BaO enhanced the basicity of slag, which also agreed well with the variations for main peak of NMR spectra of slightly shifting toward the lower frequencies. Because of the dominant effect of O 2− from BaO on the polymerization degree and viscosity of experimental slag, the number of available O − would be increased due to the addition of BaO, which had been confirmed by XPS analysis.…”

“…The details of experiment apparatus can be seen in our previous paper. [11][12] A total of 140 g premelted slag was placed into the molybdenum crucible and then sent to the uniform temperature zone of furnace for heating up to 1773K. It should be noted that Mo was found not to be dissolved in the molten slag, which ensured the accuracy of experimental results in present work.…”

“…The viscosity of slag was measured by employing the RTW‐10 melt physical property comprehensive testing instrument with a digital viscometer. The details of experiment apparatus can be seen in our previous paper 11–12 . A total of 140 g premelted slag was placed into the molybdenum crucible and then sent to the uniform temperature zone of furnace for heating up to 1773K.…”