Abstract
High aluminum containing steels react vigorously with silica-based mold fluxes to form alumina. The change in alumina content increases the viscosity and thus silica-based mold fluxes are compensated with significant amounts of Na2O, CaF2, and Li2O to ensure both lubrication and heat transfer control. Detailed viscosity studies using the rotating spindle method showed that additions of CaF2 up to 8 wt% in the CaO- SiO2-12wt%Na2O system at a constant CaO/SiO2 ratio of 0.8 decreases the viscosity by breaking the network structure of molten fluxes, but is negligible above 8 wt%. A similar modification of the network wasobserved for Li2O up to 2 wt%. The viscosity data was correlated with the XPS analysis and verified CaF2 and Li2O as effective in modifying complex silicate structures into simpler silicate structures depending on the availability of complex silicates and thus was limited to below certain concentrations.
| Original language | English |
|---|---|
| Pages (from-to) | 1-8 |
| Number of pages | 8 |
| Journal | ISIJ International |
| Volume | 51 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 May 20 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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Effect of CaF2 and Li2O additives on the viscosity of CaO-SiO2-Na2O slags. / Kim, Hyuk; Sohn, Ii.
In: ISIJ International, Vol. 51, No. 1, 20.05.2011, p. 1-8.Research output: Contribution to journal › Article
TY - JOUR
T1 - Effect of CaF2 and Li2O additives on the viscosity of CaO-SiO2-Na2O slags
AU - Kim, Hyuk
AU - Sohn, Ii
PY - 2011/5/20
Y1 - 2011/5/20
N2 - High aluminum containing steels react vigorously with silica-based mold fluxes to form alumina. The change in alumina content increases the viscosity and thus silica-based mold fluxes are compensated with significant amounts of Na2O, CaF2, and Li2O to ensure both lubrication and heat transfer control. Detailed viscosity studies using the rotating spindle method showed that additions of CaF2 up to 8 wt% in the CaO- SiO2-12wt%Na2O system at a constant CaO/SiO2 ratio of 0.8 decreases the viscosity by breaking the network structure of molten fluxes, but is negligible above 8 wt%. A similar modification of the network wasobserved for Li2O up to 2 wt%. The viscosity data was correlated with the XPS analysis and verified CaF2 and Li2O as effective in modifying complex silicate structures into simpler silicate structures depending on the availability of complex silicates and thus was limited to below certain concentrations.
AB - High aluminum containing steels react vigorously with silica-based mold fluxes to form alumina. The change in alumina content increases the viscosity and thus silica-based mold fluxes are compensated with significant amounts of Na2O, CaF2, and Li2O to ensure both lubrication and heat transfer control. Detailed viscosity studies using the rotating spindle method showed that additions of CaF2 up to 8 wt% in the CaO- SiO2-12wt%Na2O system at a constant CaO/SiO2 ratio of 0.8 decreases the viscosity by breaking the network structure of molten fluxes, but is negligible above 8 wt%. A similar modification of the network wasobserved for Li2O up to 2 wt%. The viscosity data was correlated with the XPS analysis and verified CaF2 and Li2O as effective in modifying complex silicate structures into simpler silicate structures depending on the availability of complex silicates and thus was limited to below certain concentrations.
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U2 - 10.2355/isijinternational.51.1
DO - 10.2355/isijinternational.51.1
M3 - Article
AN - SCOPUS:79956038956
VL - 51
SP - 1
EP - 8
JO - ISIJ International
JF - ISIJ International
SN - 0915-1559
IS - 1
ER -