Concept of Inclusion Capacity of Slag and Its Application on the Dissolution of Al2O3, ZrO2 and SiO2 Inclusions in CaO–Al2O3–SiO2 Slag

Gou, Lan; Liu, Hong; Ren, Ying; Zhang, Lifeng

doi:10.1007/s11663-023-02763-y

Cited by 7 publications

(1 citation statement)

References 55 publications

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“…[ 6,7 ] The generated spinel inclusions can be removed from the slag through various processes such as ladle, tundish, and mold. [ 8,9 ] Among recent studies have been studied to remove inclusions into slags, [ 10–13 ] they have few papers about the dissolution of MgAl 2 O 4 inclusion. In particular, it is important to dissolve inclusions into mold slag because the mold is the last removal process before casting.…”

Section: Introductionmentioning

confidence: 99%

Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag

Kim,

Chung

2024

steel research int.

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This study investigates the dissolution behavior of single crystal MgAl2O4 particle in CaO–SiO2–Al2O3–MgO–CaF2–Na2O slags using single hot thermocouple technique (SHTT) from 1550 to 1650 °C. MgAl2O4 contents of the slag are set at 5, 15, and 25 wt%, and the basicity (CaO/SiO2) of the slags is fixed at 0.9. Dissolution rate is determined by image analysis of the MgAl2O4 spinel size over time in the slag. In the experimental results, the dissolution rate increases as the temperature increases and as the contents of MgAl2O4 in the slag decreases. During the dissolution, the cube or trapezoid cube shaped MgAl2O4 particles change into a truncated cube, a cube with rounded corners and a sphere. The shrinking core model is modified into a volume ratio and found that the MgAl2O4 dissolution kinetic varies with the slag chemical composition. At high temperature, it appears to be chemical controlled. The dissolution firstly occurs at the corners and edges of the cube particle which can be understood by the Gibbs–Thomson equation. The activation energies of MgAl2O4 dissolution are 205 kJ mol−1 at 5 wt% MgAl2O4, 181 kJ mol−1 at 15 wt% MgAl2O4 and 594 kJ mol−1 at 25 wt% MgAl2O4. The activation energy calculated should be started as similar to other inclusions of Al2O3 and MgO.

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Section: Introductionmentioning

confidence: 99%

Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag

Kim,

Chung

2024

steel research int.

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First‐Principles Calculation and In Situ Observation on the Precipitation of Inclusions during Solidification of a High Sulfur Steel

Yang,

Ren,

Wang

et al. 2024

steel research int.

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The precipitation process of inclusions in the high sulfur steel with the cerium addition is observed using the high‐temperature confocal scanning laser microscope (CSLM). Rare earth (Re) inclusions formed in the molten steel, and MnS inclusions precipitate along grain boundaries or on oxide cores at the end of solidification. With the addition of cerium, the average aspect ratio of inclusions in the steel decreases from 6.5 to 5.0, and the addition of cerium effectively modifies the elongated MnS. Thermodynamic calculations show the inclusion transformation during solidification, yet it lacked the formation of Ce2O2S and Re sulfides. According to the first‐principles calculation, the priority of the inclusion formation was Ce2O3 > CeAlO3, Ce2O2S > CeS > Ce3S4 > MnS. The stability of MnS inclusions is much lower than that of cerium‐containing inclusions. It is in situ observed that the addition of cerium promotes the formation of cerium‐containing inclusions and reduces the precipitation of MnS in the high sulfur steel.

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Hot Heel, Tapping and Energy Recovery

Conejo

2024

Electric Arc Furnace: Methods to Decrease Energy Consumption

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Concept of Inclusion Capacity of Slag and Its Application on the Dissolution of Al2O3, ZrO2 and SiO2 Inclusions in CaO–Al2O3–SiO2 Slag

Cited by 7 publications

References 55 publications

Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag

Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag

First‐Principles Calculation and In Situ Observation on the Precipitation of Inclusions during Solidification of a High Sulfur Steel

Hot Heel, Tapping and Energy Recovery

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Concept of Inclusion Capacity of Slag and Its Application on the Dissolution of Al2O3, ZrO2 and SiO2 Inclusions in CaO–Al2O3–SiO2 Slag

Cited by 7 publications

References 55 publications

Dissolution Behavior of MgAl2O4 Spinel Inclusions in Mold Slag

Dissolution Behavior of MgAl2O4 Spinel Inclusions in Mold Slag

First‐Principles Calculation and In Situ Observation on the Precipitation of Inclusions during Solidification of a High Sulfur Steel

Hot Heel, Tapping and Energy Recovery

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Product

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About

Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag

Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag