Dissolution rate and mechanism of solid MgO particles in synthetic ladle slags

Wang, Deyong; Li, Xiaobing; Wang, Huihua; Mi, Yi; Jiang, Maofa; Zhang, Yongcang

doi:10.1016/j.jnoncrysol.2012.02.014

Cited by 23 publications

(8 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Binary and ternary phases, such as C 3 S and merwinite (C 3 MS 2 ), were identified between zones I and II, which suggested the presence of 'inner slag', as has been reported by Wang et al 38 The ion Si 4+ was also generated by the dissolution of magnesia particles; binary (C 2 S and C 3 S) and ternary (C 2 AS) phases containing this component were therefore detected in zone III.…”

Section: Corrosion Testsupporting

confidence: 70%

“…Finally, the region III was defined, where phases formed with the ions incorporated into the melt by the complete dissolution of the outer layers of the particle, mainly Mg +2 , and Ca +2 and Si +4 in lower proportions, were identified. The aspect of the spinel detected in this last region suggested that it was formed by precipitation from the liquid, 38 which was saturated in MgO, contrary to that of zone II.…”

Section: Corrosion Testmentioning

confidence: 81%

“…13), which were only present in AMC2 material, showed a severe slag attack through the grain boundaries and direct corrosion 30 with spinel MgAl 2 O 4 formation; this agrees with observations by other authors. 38 Different zones are distinguished in image (a) of Fig. 13.…”

Section: Corrosion Testmentioning

confidence: 99%

See 2 more Smart Citations

Chemical wear of Al 2 O 3 –MgO–C bricks by air and basic slag

Muñoz

Galliano

Brandaleze

et al. 2015

Journal of the European Ceramic Society

View full text Add to dashboard Cite

Section: Corrosion Testsupporting

confidence: 70%

Section: Corrosion Testmentioning

confidence: 81%

See 1 more Smart Citation

Chemical wear of Al 2 O 3 –MgO–C bricks by air and basic slag

Muñoz

Galliano

Brandaleze

et al. 2015

Journal of the European Ceramic Society

View full text Add to dashboard Cite

“…During the dissolution process, a mass change in a shrinking/dissolving particle was equal to the mass flux across the boundary layer, which is as follows

‐ \frac{4 π ρ_{normalP} R^{2} d R}{d t} = 4 π R^{2} k Δ C

P e = \frac{2 R U}{D}; R e = \frac{2 R ρ_{normals} U}{μ}

where ρ P and ρ s are the densities of the dissolving particle and slag, respectively; U is the fluid flow speed around particle, μ is the viscosity of the liquid slag; and the mass transfer coefficient k is approximately equal to D / R when the Peclet number Pe < 10 and the Reynolds number Re << 1 . The dissolution was expressed in the following equation describing the classical shrinking‐core model as limited by mass transfer through the boundary layer

\frac{t}{τ} = 1 - {(\frac{R}{R_{0}})}^{2}; τ = \frac{ρ_{normalP} R_{0}^{2}}{2 D_{normals} Δ C}

…”

Section: Resultsmentioning

confidence: 99%

Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

Wang

et al. 2019

steel research int.

View full text Add to dashboard Cite

The nonmetallic inclusions absorbed by ladle slags during secondary steelmaking operations and in the tundish and mold during casting are crucial to the production of interstitial-free (IF) steel. However, little to no research has been conducted on the separation and dissolution of inclusions along with a focus on IF steel. Herein, a theoretical study of the separation of solid alumina at the steel-slag interface is conducted. The dissolution of alumina particles is observed in situ in different IF steel slags, and the dissolution mechanism is analyzed. The results show that the interfacial tensions and slag viscosity have a large influence on the predicted displacement, but for IF steel production, the dissolution of inclusions in the slags has a greater influence on the removal of inclusions than on inclusion separation. Using ladle slags with a proper CaO wt%/Al 2 O 3 wt% is the most effective way to remove the Al 2 O 3 inclusions compared with the other slags in IF steel production.

show abstract

“…[1][2][3][4][5][6] The dissolution rate of MgO refractory into oxide slags strongly depends on the slag composition and temperature. 7) Both dissolution and penetration are considerably affected by wettability. [8][9][10][11] Wettability, also called dynamic wetting, is divided into two categories: non-reactive wetting and reactive wetting.…”

Section: Introductionmentioning

confidence: 99%

Initial Wetting and Spreading Phenomena of a CaO–SiO2 Liquid Slag on MgO Substrates

et al. 2014

View full text Add to dashboard Cite

Initial wetting phenomena and spreading property of CaO-SiO2 slag on MgO single and poly-crystal refractory substrates are investigated using sessile drop technique and a high-speed camera (1 500 frame/s). By observing and analyzing the spreading rate, change of the contact angle, and the composition change in slag and refractory, we found that the initial wetting is non-reactive and controlled by viscous friction.

show abstract

Dissolution rate and mechanism of solid MgO particles in synthetic ladle slags

Cited by 23 publications

References 20 publications

Chemical wear of Al 2 O 3 –MgO–C bricks by air and basic slag

Chemical wear of Al 2 O 3 –MgO–C bricks by air and basic slag

Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

Initial Wetting and Spreading Phenomena of a CaO–SiO2 Liquid Slag on MgO Substrates

Contact Info

Product

Resources

About