Effect of TiO2 on the Viscosity and Slag Structure in Blast Furnace Type Slags |
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| Authors: | Hyunsik Park Jun‐Young Park Gi Hyun Kim Il Sohn |
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| Affiliation: | 1. Department of Materials Science and Engineering, Formerly Research Assistant at the Research Institute of Iron and Steel Technology, Yonsei University, New South Wales, Australia;2. Materials Science and Engineering, Yonsei University, Seoul 120‐749, Korea |
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| Abstract: | TiO2 additions up to 10 mass% behaved as a basic oxide and lowered the viscosity in the CaO–SiO2–17 mass% Al2O3–10 mass% MgO‐based slags by depolymerizing the silicate network structure. Raman spectroscopy revealed the sum of NBO/Si 1 and 3 decreased while the sum of NBO/Si 2 and 4 increased with TiO2 content. Unlike the silicate structures, the aluminate structures seems to be relatively unaffected by TiO2 additions according to the FTIR results. 5 mass% TiO2 significantly decreased the viscosity compared to the TiO2 free slags, but beyond 5 mass% TiO2 meaningful changes in the viscosity was not observed. From the comparison of the viscosity at constant TiO2 of 5 and 10 mass% and varying CaO/SiO2 ratio, increasing the CaO/SiO2 ratio was more effective in decreasing the viscosity than TiO2 additions. |
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| Keywords: | TiO2 viscosity Raman FTIR slag silicate depolymerizing |
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