Effect of TiO 2 on the viscosity and slag structure in blast furnace type slags

Hyunsik Park, Jun Young Park, Gi Hyun Kim, Il Sohn

Research output: Contribution to journalArticle

110 Citations (Scopus)

Abstract

TiO 2 additions up to 10mass% behaved as a basic oxide and lowered the viscosity in the CaO-SiO 2-17mass% Al 2O 3-10mass% 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 TiO 2 content. Unlike the silicate structures, the aluminate structures seems to be relatively unaffected by TiO 2 additions according to the FTIR results. 5mass% TiO 2 significantly decreased the viscosity compared to the TiO 2 free slags, but beyond 5mass% TiO 2 meaningful changes in the viscosity was not observed. From the comparison of the viscosity at constant TiO 2 of 5 and 10mass% and varying CaO/SiO 2 ratio, increasing the CaO/SiO 2 ratio was more effective in decreasing the viscosity than TiO 2 additions. TiO 2 additions lowered the viscosity of blast furnace type slags by depolymerizing the silicate network, but did not significantly affect the aluminate structures within the slags. TiO 2 (5mass%) decreased the viscosity, but higher TiO 2 showed no meaningful changes in the viscosity. Increasing the CaO/SiO 2 ratio was more effective in decreasing the viscosity than TiO 2 additions.

Original languageEnglish
Pages (from-to)150-156
Number of pages7
JournalSteel Research International
Volume83
Issue number2
DOIs
Publication statusPublished - 2012 Feb 1

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slags
blasts
Blast furnaces
Slags
furnaces
Viscosity
viscosity
Silicates
silicates
Oxides
Raman spectroscopy
oxides

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Park, Hyunsik ; Park, Jun Young ; Kim, Gi Hyun ; Sohn, Il. / Effect of TiO 2 on the viscosity and slag structure in blast furnace type slags. In: Steel Research International. 2012 ; Vol. 83, No. 2. pp. 150-156.
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abstract = "TiO 2 additions up to 10mass{\%} behaved as a basic oxide and lowered the viscosity in the CaO-SiO 2-17mass{\%} Al 2O 3-10mass{\%} 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 TiO 2 content. Unlike the silicate structures, the aluminate structures seems to be relatively unaffected by TiO 2 additions according to the FTIR results. 5mass{\%} TiO 2 significantly decreased the viscosity compared to the TiO 2 free slags, but beyond 5mass{\%} TiO 2 meaningful changes in the viscosity was not observed. From the comparison of the viscosity at constant TiO 2 of 5 and 10mass{\%} and varying CaO/SiO 2 ratio, increasing the CaO/SiO 2 ratio was more effective in decreasing the viscosity than TiO 2 additions. TiO 2 additions lowered the viscosity of blast furnace type slags by depolymerizing the silicate network, but did not significantly affect the aluminate structures within the slags. TiO 2 (5mass{\%}) decreased the viscosity, but higher TiO 2 showed no meaningful changes in the viscosity. Increasing the CaO/SiO 2 ratio was more effective in decreasing the viscosity than TiO 2 additions.",
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Effect of TiO 2 on the viscosity and slag structure in blast furnace type slags. / Park, Hyunsik; Park, Jun Young; Kim, Gi Hyun; Sohn, Il.

In: Steel Research International, Vol. 83, No. 2, 01.02.2012, p. 150-156.

Research output: Contribution to journalArticle

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AB - TiO 2 additions up to 10mass% behaved as a basic oxide and lowered the viscosity in the CaO-SiO 2-17mass% Al 2O 3-10mass% 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 TiO 2 content. Unlike the silicate structures, the aluminate structures seems to be relatively unaffected by TiO 2 additions according to the FTIR results. 5mass% TiO 2 significantly decreased the viscosity compared to the TiO 2 free slags, but beyond 5mass% TiO 2 meaningful changes in the viscosity was not observed. From the comparison of the viscosity at constant TiO 2 of 5 and 10mass% and varying CaO/SiO 2 ratio, increasing the CaO/SiO 2 ratio was more effective in decreasing the viscosity than TiO 2 additions. TiO 2 additions lowered the viscosity of blast furnace type slags by depolymerizing the silicate network, but did not significantly affect the aluminate structures within the slags. TiO 2 (5mass%) decreased the viscosity, but higher TiO 2 showed no meaningful changes in the viscosity. Increasing the CaO/SiO 2 ratio was more effective in decreasing the viscosity than TiO 2 additions.

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