Influences of Al2O3 and TiO2Content on Viscosity and Structure of CaO–8%MgO–Al2O3–SiO2–TiO2–5%FeO Blast Furnace Primary Slag

Li, Tingle; Sun, Changyu; Song, Sunny; Wang, Qi

doi:10.3390/met9070743

Cited by 28 publications

(17 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The trend of the viscosity as a function of Al2O3 content exhibited different patterns with increasing Al2O3 at the studied MgO concentrations. As noted in our previous work [13], for slag with 8 mass% MgO, the addition of Al2O3 with 10 to 15 mass% increased the viscosity, reaching a maximum, followed by a decrease at higher Al2O3 content. From Figure 4a, when the slag contains 10% MgO, by increasing Al2O3 content from 10% to 12%, the slag viscosity is reduced.…”

Section: Characterization Of the Slag's Network Structuresupporting

confidence: 79%

“…The Ti−O network is believed to be simplified with higher MgO content due to its less complex and simpler Ti−O structures, as proven in Figure 9. From the FTIR spectra in Figures 6 and 7, the absence of [AlO6] 9- Additionally, the FTIR trough at ~500 cm -1 becomes shallower, corresponding to the decreased viscosity from 15% to 18% Al2O3 for the 8% MgO slags [13]. For the present slags with 10% and 12% MgO in Figure 6, the trough is also dampened while the corresponding viscosity increases from 15% to 18% Al2O3.…”

Section: Correlation Between Viscosity and Network Structurementioning

confidence: 79%

“…Generally, the average amount of non-bridging oxygen (NBO/Si) is used to explain the Si−O network by referring to previous studies [38,39]. NBO/Si is calculated by the mole fractions of Q n multiplied by the amount of its non-bridging oxygen, where lower NBO/Si implies a more polymerized [32][33][34] area ratios and the Raman scattering coefficient of Q n , the mole fractions of Q n could be calculated by the specified equation [13,37]. Generally, the average amount of non-bridging oxygen (NBO/Si) is used to explain the Si−O network by referring to previous studies [38,39].…”

Section: The Network Structurementioning

confidence: 99%

See 2 more Smart Citations

Roles of MgO and Al2O3 on the Viscous and Structural Behavior of Blast Furnace Primary Slag, Part 1: C/S = 1.3 Containing TiO2

Sun

Song

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

This research provides fundamental insight into the roles of MgO and Al 2 O 3 on the viscous and structural behaviors of CaO−SiO 2 −MgO−Al 2 O 3 −10 mass% TiO 2 −5 mass% FeO (CaO/SiO 2 = 1.3) system primary blast furnace slag. The slag viscosity is measured by the rotating cylinder method, which is essential to the efficient and stable operation of a blast furnace. The network structure characterization of the quenched vitreous samples was conducted using Fourier Transformation Infrared (FTIR) and Raman spectroscopy. Usual viscous behaviors (that the slag viscosity and the activation energy decrease or increase with increasing MgO or Al 2 O 3 content) were observed, corresponding to changes in the network structure certified by FTIR and Raman analyses. It seems that the addition of MgO and Al 2 O 3 prefers to modify the Si−O and Ti−O network in the present slag. When the slag composition reaches 10% MgO and 12% Al 2 O 3 , unexpected viscous behaviors (that MgO increases viscosity and Al 2 O 3 decreases viscosity) are discovered. The roles of MgO and Al 2 O 3 could be interpreted by changes in the arrangement structure of ions in liquid, corresponding to changes in the primary equilibrium phase region determined in phase diagrams and variation in the difference between the experimental and liquidus temperature, respectively.

show abstract

Section: Characterization Of the Slag's Network Structuresupporting

confidence: 79%

Section: Correlation Between Viscosity and Network Structurementioning

confidence: 79%

Section: The Network Structurementioning

confidence: 99%

See 1 more Smart Citation

Roles of MgO and Al2O3 on the Viscous and Structural Behavior of Blast Furnace Primary Slag, Part 1: C/S = 1.3 Containing TiO2

Sun

Song

et al. 2019

Metals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thereby, the viscosity of investigated BF slags decreases with increasing TiO 2 content [23,24]. The viscosity of BF slag was examined as a function of TiO 2 and Al 2 O 3 content in [25] and as a function of MgO and Al 2 O 3 in [26,27].…”

Section: Introductionmentioning

confidence: 99%

“…The structure of FeO-containing nickel slag was analyzed by Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopy in [21,22]. The effect of TiO 2 and FeO [24], TiO 2 and Al 2 O 3 [25], and MgO and Al 2 O 3 [26,27] on the structure of BF slag was investigated using FTIR and Raman analysis. In [29], the effect of Al 2 O 3 and FeO contents on the structure of highly basic CaO-MgO-SiO 2 -Al 2 O 3 -FeO slag was also analyzed using FTIR.…”

Section: Introductionmentioning

confidence: 99%

Viscosity of BOF Slag

Kovtun

Korobeinikov

Srishilan

et al. 2020

Metals

View full text Add to dashboard Cite

The viscosities of the industrial basic oxygen furnace (BOF) slag with varying compositions of MgO, Al2O3, TiO2, and MnO were continuously measured at a temperature range between 1400 and 1700 °C using the rotating bob method. Three characteristic temperatures for the melting behavior of the BOF slag were investigated using a high-temperature microscope. The solid fraction of the slag was calculated by FactSage 7.2 using the FTOxid database. General observations from the experimental data show that the increase in MgO tends to increase viscosity. However, Al2O3, TiO2, and MnO decrease viscosity up to a certain level, and beyond that, they also increase the viscosity. The measured values of the viscosity of BOF slags were compared and discussed with known data from the literature. Finally, the activation energy of BOF slags with different compositions of MgO, Al2O3, TiO2, and MnO was calculated in the temperature range of industrial operations.

show abstract

Characterization of blast furnace slag particles generated by nitrogen jet granulation

et al. 2022

View full text Add to dashboard Cite

This paper reports an experimental study on the changes in the equivalent diameter and sphericity of flying molten slag particles in terms of heating temperature and nitrogen injection pressure. A high‐speed camera is used to continuously take images of the flying molten particles. Then the images are analyzed by mathematical image processing. With increasing heating temperature, the lower the viscosity, the stronger the fluidity, and the easier it is to be granulated into small particles under the spray of nitrogen. The results show that the equivalent diameter and sphericity of the particles with equivalent diameters remain the same during the flight. During the granulation of the particles, however, rod‐shaped particles gradually change to spherical ones, and the sphericity keeps increasing until it reaches a level. The average flying speed of the studied slag particles at the temperatures of 1400, 1450, 1475, 1500, and 1510°C is 4.0, 4.3, 4.5, 4.3, and 4.2 m/s, respectively. In addition, the higher the temperature, the longer the flight distance of the particles. By changing the gas injection pressure to 0.2, 0.3, 0.4, and 0.5 MPa, the average flying speeds of the studied slag particles are 2.8, 3.7, 5.5, and 8.4 m/s, respectively. This result proves that the higher the injection pressure, the greater the average flying speed of the particles.

show abstract

Influences of Al2O3 and TiO2Content on Viscosity and Structure of CaO–8%MgO–Al2O3–SiO2–TiO2–5%FeO Blast Furnace Primary Slag

Cited by 28 publications

References 38 publications

Roles of MgO and Al2O3 on the Viscous and Structural Behavior of Blast Furnace Primary Slag, Part 1: C/S = 1.3 Containing TiO2

Roles of MgO and Al2O3 on the Viscous and Structural Behavior of Blast Furnace Primary Slag, Part 1: C/S = 1.3 Containing TiO2

Viscosity of BOF Slag

Characterization of blast furnace slag particles generated by nitrogen jet granulation

Contact Info

Product

Resources

About