Effect of Cr2O3 content on viscosity and phase structure of chromium-containing high-titanium blast furnace slag

Yang, Ding; Zhang, Feng; Wang, Jian; Yan, Zhiming; Pei, Guishang; Qiu, Guibao; Lv, Xuewei

doi:10.1016/j.jmrt.2020.10.061

Cited by 19 publications

(6 citation statements)

References 10 publications

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“…With the addition of Cr 2 O 3 , evident shoulders appeared around the peak at 550 cm −1 . According to the research of Yang et al, [ 34 ] this is caused by the symmetrical bending vibration of CrO bonds in the 6‐coordinated [CrO 6 ] 9− octahedron.…”

Section: Resultsmentioning

confidence: 99%

“…With the addition of Cr 2 O 3 , evident shoulders appeared around the peak at 550 cm À1 . According to the research of Yang et al, [34] this is caused by the symmetrical bending vibration of Cr─O bonds in the 6-coordinated [CrO 6 ] 9À octahedron. To achieve a quantitative description of the different structure units, it needs to conduct a deconvolution analysis of the Raman spectra to reflect all possible structures represented by peaks located at different positions.…”

Section: Effect Of Cr 2 O 3 On the Structure Of Molten Slagmentioning

confidence: 99%

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Effect of Cr₂O₃ Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag

Chen

Wang

et al. 2023

steel research int.

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Herein, the effect of Cr2O3 on the crystallization and flow behavior of CaO–SiO2–Al2O3–Na2O–CaF2 continuous casting mold slags is investigated. The viscosity in the slag at 1200–1500 °C is measured by the rotating cylinder method and a quantitative relationship between the viscosity and the Raman structure Q3/Q2 is constructed. The time–temperature–transformation and continuous cooling transformation diagrams for various slags are obtained using a single hot‐thermocouple technique. The results show that with the crystallization temperature decreases, it can be observed that the crystal growth mode gradually changes from 3D spherical and 2D massive to 1D needle‐like. The study finds the transition from network modifier to network forming agent in the slag for Cr2O3 content from 0 to 3 wt%. The Cr2O3 added to 1–2 wt% decreases the viscosity and promotes crystallization. The viscosity increases and the crystallization is inhibited when the content of Cr2O3 increases to 3 wt%. Meanwhile, when Cr2O3 is added to 3 wt%, the Cr2O3 crystalline phase precipitates except for the main crystalline phase 2CaO·SiO2.

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of Cr 2 O 3 On the Structure Of Molten Slagmentioning

confidence: 99%

Effect of Cr₂O₃ Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag

Chen

Wang

et al. 2023

steel research int.

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“…The M2O3 oxides weaken the structure of chemical systems by presenting high coordination [7] and by reacting with O 2- [49] for example. B2O3 decreases the viscosity of chemical systems CaO-SiO2-Al2O3-B2O3-Na2O-TiO2-MgO-Li2O-MnO-ZrO2 [52], Fe2O3, Cr2O3 and Al2O3 have amphoteric behavior in chemical systems Fe2O3-SiO2-FeO-MgO-Al2O3-CaO [60], CaO-SiO2-MgO-Al2O3-TiO2-Cr2O3 [61] and Al2O3-Na2O-K2O [62] respectively. Al2O3 increases the viscosity of chemical systems Al2O3-MgO [62] and SiO2-CaO-Al2O3-MgO-F --Na2O-MnO-Li2O-B2O3 [58]…”

Section: M2o3 Oxidesmentioning

confidence: 99%

Viskositas: Viscosity Prediction of Multicomponent Chemical Systems

dos¹

2022

Preprint

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Viscosity in the metallurgical and glass industry plays a fundamental role in its production processes, also in the area of geophysics. As its experimental measurement is financially expensive, also in terms of time, several mathematical models were built to provide viscosity results as a function of several variables, such as chemical composition and temperature, in linear and nonlinear models. A database was built in order to produce a nonlinear model by artificial neural networks by variation of hyperparameters to provide reliable predictions of viscosity in relation to chemical systems and temperatures. The model produced named Viskositas demonstrated better statistical evaluations of mean absolute error, standard deviation and coefficient of determination (R 2 ) in relation to the test database when compared to different models from literature and 1 commercial model, offering predictions with lower errors, less variability and less generation of outliers.

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“…Due to the increase of thermal motion, the depolymerization of the melt increased with higher temperatures. 45) The fully liquid slag which was considered as Newtonian fluid and the viscosity dependence of the temperature can be described by the Arrhenius type equation, which is shown in Eq. ( 12).…”

Section: Effect Of Ce 2 O 3 On the Viscositymentioning

confidence: 99%

Effect of Ce2O3 on the Melt Structure and Properties of CaO–Al2O3-based Slag

Zheng

Liu

2022

ISIJ Int.

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The low-reactive tundish flux is urgently required for the smelting of rare-earth steels. The effect of Ce 2 O 3 content on the properties (melting point and viscosity) and structure of CaO-Al 2 O 3 -Ce 2 O 3 -MgO-SiO 2 slag were analyzed in the present investigation. The research results indicated that the polymerized Q Al 4 and Q Al 3 units were modified to Q Al 2 units in aluminate, and the depolymerization of SiO 4 -tetrahedrons from Q Si 1 to Q Si 0 units with Ce 2 O 3 addition increasing from 5 wt% to 20 wt%. In addition, when the Ce 2 O 3 addition increased from 15 wt% to 20 wt%, the increasing area fraction in AlO 6 -octahedral units further led to a decrease in the degree of polymerization (DOP) in the melts. When the Ce 2 O 3 addition increased from 5 wt% to 20 wt%, the melting temperature decreased from 1 320°C to 1 301°C. Additionally, the softening temperature and the fluidity temperature also decreased 20°C and 24°C, respectively. The viscosity decreased as the Ce 2 O 3 addition increased from 5 wt% to 20 wt%, which was attributed to the decreased DOP and the increased superheat. A reasonable content for Ce 2 O 3 should not be excess 10 wt% in the current slag.

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Effect of Cr2O3 content on viscosity and phase structure of chromium-containing high-titanium blast furnace slag

Cited by 19 publications

References 10 publications

Effect of Cr₂O₃ Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag

Effect of Cr₂O₃ Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag

Viskositas: Viscosity Prediction of Multicomponent Chemical Systems

Effect of Ce<sub>2</sub>O<sub>3</sub> on the Melt Structure and Properties of CaO–Al<sub>2</sub>O<sub>3</sub>-based Slag

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Effect of Cr2O3 content on viscosity and phase structure of chromium-containing high-titanium blast furnace slag

Cited by 19 publications

References 10 publications

Effect of Cr2O3 Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag

Effect of Cr2O3 Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag

Viskositas: Viscosity Prediction of Multicomponent Chemical Systems

Effect of Ce<sub>2</sub>O<sub>3</sub> on the Melt Structure and Properties of CaO–Al<sub>2</sub>O<sub>3</sub>-based Slag

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Effect of Cr₂O₃ Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag

Effect of Cr₂O₃ Content on the Viscosity and Crystallization Properties of Continuous Casting Mold Slag