Effect of CaO–MgO–SiO&lt;sub&gt;2&lt;/sub&gt;–Al&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt;–TiO&lt;sub&gt;2&lt;/sub&gt; Slags with Different CaF&lt;sub&gt;2&lt;/sub&gt; Contents on Inclusions in Ti-Stabilized 20Cr Stainless Steel

Li, Jingyu; Cheng, Guoguang

doi:10.2355/isijinternational.isijint-2019-277

Cited by 18 publications

(7 citation statements)

References 43 publications

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“…Meanwhile they also investigated the dependence of the composition ratio of steel on the activity ratio of slag at different CaF 2 contents, which was calculated by IMCT model, and the phenomena was found that the calculation results are consistent with the experimental results. Although the Ti could be oxidized by the SiO 2 according to the literature (Kim et al, 1993) ∼ (Li and Cheng, 2019), Ti would be oxidized by Al 2 O 3 in other slags, such as ESR slag (Jiang et al, 2016). And they also obtained that clearly the calculated results by IMCT model are in good agreement with experimental results.…”

Section: Introductionmentioning

confidence: 59%

“…The composition of Al-killed and Ti-bearing steel used in this study was listed in Table 1. During the ladle metallurgy process, the reactions (1-3) between the liquid steel and slag would lead to the loss of Ti and Al in the steel (Qian et al, 2014;Li and Cheng, 2019). The slag composition assigned for this paper's discussion section is shown in Table 2.…”

Section: Thermodynamic Interaction For Metal-slagmentioning

confidence: 99%

“…12, the dependence of the activity ratio of steel on the activity ratio of slag at different experiment heats, which includes JY. Li's (Li and Cheng, 2019), ZH. Jian's (Jiang et al, 2016),J.Park's (Park et al, 2008) and this author's experiment data, are shown in Figure 2.…”

Section: Sio2mentioning

confidence: 99%

“…The activity change behavior of TiO 2 in different TiO 2 content slag, calculated by IMCT model, are in good agreement of the experiment results. Li and Cheng (2019) investigated the effect of the CaF 2 contents in the CaO-SiO 2 -MgO-Al 2 O 3 -TiO 2 -CaF 2 slag on the formation of inclusion in Ti-Stabilized 20Cr Stainless Steel. They found that with the increase of CaF 2 content in the slag, the equilibrium content of Ti and Mg in the steel increased.…”

Section: Introductionmentioning

confidence: 99%

“…According to the previous researches (Qian et al, 2014;Jiang et al, 2016;Li and Cheng, 2019), The IMCT model has been applied in CaO-SiO 2 -MgO-Al 2 O 3 -TiO 2 -CaF 2 slag system successfully for Ti-bearing stainless steel and 825 alloy refining process. However, the CaO-SiO 2 -MgO-Al 2 O 3 -TiO 2 -CaF 2 -BaO slag for low alloy high Ti-bearing steel refining, has never been explored.…”

Section: Introductionmentioning

confidence: 99%

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The Establishment of Thermodynamic Model for Ti Bearing Steel-Slag Reaction and Discuss

et al. 2022

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A thermodynamic model for seven CaO-MgO-BaO-CaF2-SiO2-Al2O3-TiO2 ladle slags based on the Ion and Molecule Coexistence theory (IMCT) is establishment and validated by the experiment results at 1873K. The calculated activity of SiO2, Al2O3 and TiO2 in the slag can be approved by the experiment results and the IMCT model used in this study is reasonable. Then the influence factors such as the mass ratio of CaO to SiO2 (C/S ratio) ranging from 1 to 10, the mass ratio of CaO to Al2O3 (C/A ratio) ranging from 1 to 2.5, TiO2 content (wt pct) ranging from 0 to 30, BaO content (wt pct) ranging from 0 to 30 are investigated based on the thermodynamic calculating results. The raise of C/S ratio, TiO2 content and BaO content in the slag can increase the molar Gibbs energy change (ΔG) of Ti reacted with SiO2 and Al2O3 or Al reacted with SiO2. The effect of C/A ratio on the molar Gibbs energy change (ΔG) of Ti reacted with SiO2 and Al2O3 or Al reacted with SiO2 was less. Finally, the slag with higher C/S ratio and TiO2 content and appropriate BaO content can weaken the reaction between Ti and SiO2 or Al2O3 in the slag.

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Section: Introductionmentioning

confidence: 59%

Section: Thermodynamic Interaction For Metal-slagmentioning

confidence: 99%

Section: Sio2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Establishment of Thermodynamic Model for Ti Bearing Steel-Slag Reaction and Discuss

et al. 2022

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The Effect of TiO₂ in the Ladle Slag on Inclusion in Ti‐Bearing Steel

Zhao

Líu

Wang

et al. 2022

steel research int.

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To improve the castability of Ti‐bearing steel, the knowledge of inclusions formed in liquid steel, affected by the slag composition, must be obtained. In this study, the effect of TiO2 in ladle slag on inclusions in this steel at 1873 K is investigated. Experimental results indicate that Ca–Mg–Al–Ti–O complex inclusions, complex TiN inclusions containing MgO–Al2O3–TiOx cores, Ti–C–S inclusions, and TiC inclusions appear in the steel samples. The cores in TiN inclusions are mainly in the liquid and liquid + spinel fields before slag addition. When the steel reacts with slag containing 0% TiO2 for 1 h, the inclusions in the steel are mostly in the MgO + liquid + spinel and MgO + liquid field and have the highest MgO content. When the steel reacts with slag containing 5%≈20% TiO2 for 1 h, most inclusions are liquid slag + spinel and liquid slag phases. The average liquid fraction in most inclusions is higher than 60%. The ratio of the (mass percentages Ti3+) to (Ti3++mass Ti4+) in most liquid phases is approximately 50%≈70% for these oxide cores. Increasing TiO2 content in slag increases log(), which in turn decreases Mg content in the steel. This decreases MgO content in MgO–Al2O3–TiOx type inclusions.

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Development of a Kinetic Model for Ti‐Bearing Steel‐Slag Reaction

Zhao

Líu

Wang

et al. 2023

steel research int.

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A kinetic model based on the double-film theory is developed to predict the composition-change behavior of Ti-bearing steel and slag during the slag-liquid steel reaction process and validated by experimental results. The chemical reactions between the slag-metal, slag-crucible refractory, and metal-crucible refractory are considered. Specifically, a coupled reaction model based on the CaO-MgO-CaF 2 -SiO 2 -Al 2 O 3 -TiO 2 -FeO-MnO and Fe-Si-Al-Ti-Ca-Mg-Mn-S-O systems is applied to describe the reaction between liquid steel and slag. Furthermore, the activity coefficients of slag components are calculated using the ion and molecular coexistence theory model. The reaction between the slag and refractory is described using an empirical equation. The reaction between the liquid steel and refractory is described using a coupled reaction model, wherein the reaction between [Al] and MgO is considered. Finally, the effect of (TiO 2 ) on the [Ti] is discussed using this model. The results indicate that the [Ti] decreases, the [Si] increases, and the [Al] increases initially and subsequently decreases with reaction time. An increase in (TiO 2 ) can decrease the oxidation of [Ti] by (SiO 2 ) and (Al 2 O 3 ). When the (TiO 2 ) increases, the mass ratio of CaO to SiO 2 should be further increased to decrease the oxidation of [Ti].

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Effect of CaO–MgO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–TiO<sub>2</sub> Slags with Different CaF<sub>2</sub> Contents on Inclusions in Ti-Stabilized 20Cr Stainless Steel

Cited by 18 publications

References 43 publications

The Establishment of Thermodynamic Model for Ti Bearing Steel-Slag Reaction and Discuss

The Establishment of Thermodynamic Model for Ti Bearing Steel-Slag Reaction and Discuss

The Effect of TiO₂ in the Ladle Slag on Inclusion in Ti‐Bearing Steel

Development of a Kinetic Model for Ti‐Bearing Steel‐Slag Reaction

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Effect of CaO–MgO–SiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–TiO<sub>2</sub> Slags with Different CaF<sub>2</sub> Contents on Inclusions in Ti-Stabilized 20Cr Stainless Steel

Cited by 18 publications

References 43 publications

The Establishment of Thermodynamic Model for Ti Bearing Steel-Slag Reaction and Discuss

The Establishment of Thermodynamic Model for Ti Bearing Steel-Slag Reaction and Discuss

The Effect of TiO2 in the Ladle Slag on Inclusion in Ti‐Bearing Steel

Development of a Kinetic Model for Ti‐Bearing Steel‐Slag Reaction

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Product

Resources

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The Effect of TiO₂ in the Ladle Slag on Inclusion in Ti‐Bearing Steel