The effect of C content in MgO–C on dissolution behavior in CaO–SiO2–Al2O3 slag

Lee, Seungwook; Chung, Yoonsun

doi:10.1016/j.ceramint.2022.06.010

Cited by 8 publications

(1 citation statement)

References 21 publications

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“…Corrosion resistance of various MgO-C refractories was investigated too. Authors [17][18][19][20][21][22][23] described the corrosion mechanism of MgO-C materials in different conditions. All mentioned researches pointed out that chemical purity of MgO-C bricks magnesia part is crucial for providing excellent corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Method of raw materials selection for production of the MgO‐C bricks of comparable properties using PCA and K‐medoids

Sado

2023

Int J Applied Ceramic Tech

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MgO‐C refractories are zonally installed in most of the key heat devices of steel and iron metallurgy with the exposure to various corrosive factors. One of the most significant factors is low‐temperature decarburization resulting in the oxidation of carbon in MgO‐C refractories and loss of its properties. Moreover MgO‐C materials are exposed for direct attack of liquid slag or steel melt which easily infiltrate the porous, decarburized hot face of the bricks. Cost of MgO‐C materials of high quality is important for refractories user. For this reason researches try to develop materials of high quality but with lower cost by substituting fused raw materials with sintered ones or with recycled MgO‐C. In this article method of selecting the raw materials for production of MgO‐C bricks with comparable properties is shown. 20 different variants of MgO‐C materials were prepared with the use of various quality raw materials. Basic properties of the industrially produced MgO‐C bricks were measured. To select recipes with similar quality PCA method and K‐medoids algorithm were applied. To verify the results corrosion resistance of selected MgO‐C materials were tested with the use of induction furnace of medium frequency.This article is protected by copyright. All rights reserved

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Section: Introductionmentioning

confidence: 99%

Method of raw materials selection for production of the MgO‐C bricks of comparable properties using PCA and K‐medoids

Sado

2023

Int J Applied Ceramic Tech

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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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Physical and Chemical Wetting Behavior Between MgO-C and Liquid Slag With Varying Slag Composition

Hwang,

Chung

2023

Metall Mater Trans B

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The effect of C content in MgO–C on dissolution behavior in CaO–SiO2–Al2O3 slag

Cited by 8 publications

References 21 publications

Method of raw materials selection for production of the MgO‐C bricks of comparable properties using PCA and K‐medoids

Method of raw materials selection for production of the MgO‐C bricks of comparable properties using PCA and K‐medoids

Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag

Physical and Chemical Wetting Behavior Between MgO-C and Liquid Slag With Varying Slag Composition

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The effect of C content in MgO–C on dissolution behavior in CaO–SiO2–Al2O3 slag

Cited by 8 publications

References 21 publications

Method of raw materials selection for production of the MgO‐C bricks of comparable properties using PCA and K‐medoids

Method of raw materials selection for production of the MgO‐C bricks of comparable properties using PCA and K‐medoids

Dissolution Behavior of MgAl2O4 Spinel Inclusions in Mold Slag

Physical and Chemical Wetting Behavior Between MgO-C and Liquid Slag With Varying Slag Composition

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Product

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Dissolution Behavior of MgAl₂O₄ Spinel Inclusions in Mold Slag