Dissolution behavior of zirconia-refractories during continuous casting of steel

Bui, Anh-Hoa; Park, Sang Chae; Chung, In Sang; Lee, Hae Geon

doi:10.1007/bf03027711

Cited by 18 publications

(6 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For continuous casting of steel, the refractory used for the SEN plays a very important role as it is the last refractory in contact with the liquid steel. Therefore, the quality of the steel products will be deteriorated or the casting process may fail unless SEN can withstand thermal shock or corrosion attack from the liquid steel and molten flux 7–10 . Using the dipping bar rotation method, Bui et al 10 .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the quality of the steel products will be deteriorated or the casting process may fail unless SEN can withstand thermal shock or corrosion attack from the liquid steel and molten flux 7–10 . Using the dipping bar rotation method, Bui et al 10 . concluded that the dissolution rate of ZrO 2 –graphite refractory increased with the increase of rod rotating speed and the presence of fluoride (F −1 ) and Na 2 O in flux.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Corrosion Behaviors of Zirconia Refractory by CaO–SiO₂–MgO–CaF₂ Slag

Suk

Park

2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

In this work the corrosion behaviors of zirconia refractory (partially MgO‐stabilized zirconia) was investigated in CaO–SiO2–MgO–CaF2 slag with varying CaF2 content at 1873 K. To figure out the corrosion mechanism, the characteristics of present slag at high temperature were examined in terms of melting temperature and vaporization behaviors. Corrosion experiment and melting temperature measurement were carried out by heating microscope (HM) and the vaporization phenomenon was investigated by thermo gravimetry–differential scanning calorimetry. After experiment, the corroded interfaces of zirconia refractory by slag were analyzed by scanning electron microscope‐energy dispersive spectroscopy and electron probe microanalysis. With an addition of CaF2, three different layers were formed at the interface of slag and zirconia refractory. Furthermore, the corrosion behaviors of zirconia refractory were found to be continuously accelerated with an increase of CaF2 which facilitated the dissolution of intermediate compound. On the other hand, melting temperature of CaO–SiO2–MgO–CaF2 slag showed no continuous decrease with an increase of CaF2. Also, considerable vaporization of fluoride gas was occurred in high CaF2 containing slag during HM experiment which might cause a gradual change of slag composition and also environmental pollution. From the results, present study suggested that a proper amount of CaF2 should be added when it is used for enhancing refining capacity of slag in order not to cause any severe damage of zirconia‐based refractory by slag.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion Behaviors of Zirconia Refractory by CaO–SiO₂–MgO–CaF₂ Slag

Suk

Park

2009

Journal of the American Ceramic Society

View full text Add to dashboard Cite

show abstract

“…During the manufacture of the steel, an intense erosion of the outer wall of the SEN has been detected, mainly the one that comes in contact with the fluxes that form the slag of the mold [4]. The mechanisms of wear have already been described [5] and discussed in later studies [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 97%

Analysis of the Depth of Immersion of the Submerged Entry Nozzle on the Oscillations of the Meniscus in a Continuous Casting Mold

Saldaña-Salas

Torres-Alonso

Ramos-Banderas

et al. 2019

Metals

View full text Add to dashboard Cite

In this study the effects of the depth of immersion of the Submerged Entry Nozzles (SEN) on the fluid-dynamic structure, oscillations of the free surface and opening of the slag layer, in a continuous casting mold for conventional slab of steel were analyzed. For this work, a water/oil/air system was used in a 1:1 scale model, using the techniques of Particle Image Velocimetry (PIV), colorimetry and mathematical multiphase simulation. The results of the fluid dynamics by PIV agree with those obtained in the mathematical simulation, as well as with the dispersion of dye. It was observed that working with immersion depths of 100 mm or less could be detrimental to steel quality because they promote surface oscillations of a higher degree of Stokes with high elevations and asymmetry in their three dimensions. In addition, this generates an excessive opening of the oil layer which was corroborated through the quantification of the F index. On the other hand, with depths of immersion in the range of 150–200 mm, lower oscillations were obtained as well as zones of low speed near the wall of the SEN and a smaller opening of the oil layer.

show abstract

“…[6][7][8] Although ZrO 2 -C materials with good corrosion resistance have been used on the outside of nozzle as slag-line materials, the corrosion problem still exists. [6,7,9,10] This phenomenon not only limits the production efficiency of continuous casting but also brings hidden dangers to production safety.…”

Section: Introductionmentioning

confidence: 99%

Interface Wetting and Reaction Behavior between Mold Flux and Submerged Entry Nozzle under an External Electric Field

Tian

Yuan

Peng

et al. 2023

steel research int.

View full text Add to dashboard Cite

Herein, to provide theoretical foundation and experimental data for using electric field to control the service performance and improve the service life of submerged entry nozzle, the effect of the external electric field on the interfacial reaction and wetting behavior between the mold flux and the slag‐line materials is studied. It is shown in the results that the wettability of mold flux on the surface of the slag‐line materials is mainly affected by the dissolution and spreading under normal conditions. However, the electrochemical reaction and electric force generated by the applied electric field are also important factors for driving and changing the wettability between the mold flux and slag‐line materials. Under the positive electric field, the total duration of complete spreading and wetting is 227 s, which is 13 s shorter than that under normal conditions; the contact angle after complete wetting is about 17°, which is 1.5° lower than that under normal conditions. Under the negative electric field, the total duration of complete spreading and wetting is 260 s, which is 20 s longer than that under normal conditions; the contact angle after complete wetting is about 21°, which is 2.5° higher than that under normal conditions.

show abstract

Dissolution behavior of zirconia-refractories during continuous casting of steel

Cited by 18 publications

References 13 publications

Corrosion Behaviors of Zirconia Refractory by CaO–SiO₂–MgO–CaF₂ Slag

Corrosion Behaviors of Zirconia Refractory by CaO–SiO₂–MgO–CaF₂ Slag

Analysis of the Depth of Immersion of the Submerged Entry Nozzle on the Oscillations of the Meniscus in a Continuous Casting Mold

Interface Wetting and Reaction Behavior between Mold Flux and Submerged Entry Nozzle under an External Electric Field

Contact Info

Product

Resources

About

Dissolution behavior of zirconia-refractories during continuous casting of steel

Cited by 18 publications

References 13 publications

Corrosion Behaviors of Zirconia Refractory by CaO–SiO2–MgO–CaF2 Slag

Corrosion Behaviors of Zirconia Refractory by CaO–SiO2–MgO–CaF2 Slag

Analysis of the Depth of Immersion of the Submerged Entry Nozzle on the Oscillations of the Meniscus in a Continuous Casting Mold

Interface Wetting and Reaction Behavior between Mold Flux and Submerged Entry Nozzle under an External Electric Field

Contact Info

Product

Resources

About

Corrosion Behaviors of Zirconia Refractory by CaO–SiO₂–MgO–CaF₂ Slag

Corrosion Behaviors of Zirconia Refractory by CaO–SiO₂–MgO–CaF₂ Slag