Viscosity Measurement of Calcium Ferrite Based Slags during Structural Relaxation Process
スポンサーリンク
概要
- 論文の詳細を見る
In the present study, we measured the viscosity change with the melting time (melting temperature: 1873 K, 1773 K or 1673 K, atmosphere: air) of calcium ferrite (CaO·Fe2O4(CF)) based slags (CF, CF–5wt%SiO2 and CF–5wt%Al2O3) by the rotating crucible method. Moreover, the viscosity changes were discussed from the viewpoints of the iron oxidation states (Fe2+ and Fe3+) and the coordination number of Fe3+.Viscosity of the CF based slags decreased with the melting time at all the temperature (1673 K, 1773 K or 1873 K). Viscosities of the slags became constant after the melting time of 120 min at 1873 K and at 1773 K. In the case of the melting at 1673 K, the viscosity of the slags became constant after 240 min. The results of the chemical analysis indicated that the oxidation state of iron ions in the quenched CF slag was not changed during the viscosity measurements. We could not directly observe the change in the coordination structure of Fe3+ in CF based slags during the melting time, because the CF based slag could not be vitrified due to the limitation of quenching rate in the present study. However, the data of the viscosity and the structural information for 40CaO–40SiO2–20Fe2O3 (mol%) slag indicated that the coordination structure of Fe3+ strongly affect the viscosity of iron-containing slags. The decreases in the viscosity of the CF based slags would be also controlled by the change in the coordination number of Fe3+.
- 社団法人 日本鉄鋼協会の論文
- 2010-02-15
著者
-
Sukenaga Sohei
Department of Materials Science and Engineering, Kyushu University
-
Saito Noritaka
Department of Materials Science and Engineering, Kyushu University
-
Nakashima Kunihiko
Department of Materials Science and Engineering, Kyushu University
-
Saito Noritaka
Department Of Materials Science And Engineering Kyushu University
-
Saito Noritaka
Department Of Materials Science And Engineering Graduate School Of Engineering Kyushu University
-
Sukenaga Sohei
Department Of Materials Science And Engineering Kyushu University
-
Yoshimura Shinji
Department Of Materials Science And Engineering Kyushu University
-
GONDA Yoshiaki
Department of Materials Science and Engineering, Kyushu University
-
Gonda Yoshiaki
Department Of Materials Science And Engineering Kyushu University
-
Nakashima Kunihiko
Department Of Materials Science And Engineering Kyushu University
-
Nakashima Kunihiko
Department Of Materials Process Engineering Kyushu University
関連論文
- Reconsideration on Al Coordination in CaO–SiO2–Al2O3–(R2O or RO) Glasses by Using High Field Solid-State 27Al NMR Spectroscopy
- Viscosities of CaO-SiO_2-Al_2O_3-(R_2O or RO) Melts
- Influence of Slag Composition on Slag-Iron Interfacial Tension
- Recovery Rate of Chromium from Stainless Slag by Iron Melts
- Recovery rate of chromium from stainless slag by iron melts
- Reduction Rate of Cr_2O_3 in a Solid Powder State and in CaO-SiO_2-AI_2O_3-CaF_2 Slags by Fe-C-Si Melts
- Interfacial Tension between Molten Iron and CaO-SiO_2 Based Fluxes
- Wetting and Penetration Behavior of Calcium Ferrite Melts to Sintered Hematite
- Viscosity Measurement of Calcium Ferrite Based Slags during Structural Relaxation Process
- Penetration Behavior of Calcium Ferrite Melts into Hematite Substrate
- Glass-Metal Continuous Functionally Gradient Materials for Reflector Lamp
- Viscosity and Surface Tension Measurements of RE_2O_3-MgO-SiO_2 (RE=Y, Gd, Nd and La) Melts
- Formation Rate of Calcium Ferrite Melt Focusing on SiO_2 and Al_2O_3 Component
- Density and Surface Tension of CaO–SiO2–Al2O3–R2O (R=Li, Na, K) Melts
- Reconsideration on Al Coordination in CaO-SiO_2-Al_2O_3-(R_2O or RO) Glasses by Using High Field Solid-State ^Al NMR Spectroscopy
- Effect of Li_2O Addition on Crystallization Behavior of CaO-Al_2O_3-MgO Based Inclusions
- Effect of Agitation on Crystallization Behavior of CaO–SiO2–R2O (R = Li, Na, or K) System Characterized by Electrical Capacitance Measurement
- Effect of Oxidation State of Iron Ions on the Viscosity of Alkali Silicate Melts