Corrosion Study of MgO-C Bricks in Contact with a Steelmaking Slag

Benavídez, Edgardo; Brandaleze, Elena; Musante, Leonardo; Galliano, Pablo

doi:10.1016/j.mspro.2015.04.068

Cited by 22 publications

(12 citation statements)

References 6 publications

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“…Examples of crucible tests can be found in the study by Benavidez et al [33] on MgO-C brick corrosion, where the performance of different bricks against corrosion and oxidation was compared. For this purpose, the authors prepared cups of 50 mm in edge length and 70 mm in height.…”

Section: Crucible Testmentioning

confidence: 99%

Corrosion Tests for Refractory Materials Intended for the Steel Industry - A Review

Reynaert¹

2020

Ceramics - Silikaty

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The steel industry is one the biggest consumers of refractories. In this industry, refractories are commonly used as linings for steel production equipment, because they can sustain high temperature and corrosive attack in their working environment. However due to the harsh conditions, their life span is limited. Corrosion mainly by slag and molten steel is the principal phenomenon responsible for degradation and wear of the refractory bricks. It is a complex phenomenon that is due to infiltration (penetration) into and subsequent dissolution of the refractories by slags and molten steel. A thorough understanding of these mechanisms is necessary in order to improve the refractories behavior for steel making applications. However, even nowadays, no laboratory test can reproduce the real working conditions in the steel industry. According to the parameter of interest several testing methods have been developed. They can be static like the sessile drop test or crucible test or dynamic like the rotary slag test. This paper describes the principal corrosion tests used in the steel industry in order to give an overview of the way to determine and finally alleviate the impact of corrosion on refractories. Corrosion tests for refractory materials intended for the steel industry -A reviewCeramics - Silikáty 64 (3) 278-288 (2020)

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Section: Crucible Testmentioning

confidence: 99%

Corrosion Tests for Refractory Materials Intended for the Steel Industry - A Review

Reynaert¹

2020

Ceramics - Silikaty

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“…[ 11 ] Benavidez et al and Wang et al found that the penetration of slag of high basicity occurred at the fine grain boundaries of MgO and segregated MgO grains from the refractory structure. [ 12,13 ] Zhang et al investigated the influence of the basicity of CaO–MgO–SiO 2 slag on its penetration into refractory materials. [ 14 ] They claimed MgO refractories to exhibit excellent resistance to slags with a basicity above 1.5 or 2.0.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of MgO–C Ladle Refractory by Molten Slag

Zhao

Zheng

Liu

et al. 2020

steel research int.

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The damage of ladle refractory, which mainly occurs at the position of the slag line, results in an increasing need of maintenance and repair and can, in the worst case, lead to a breakout of melts causing potential risks for the personnel and damage of equipment. On the basis of this fact, the corrosion behavior of MgO–C refractory in contact with molten slag during the steel refining process is experimentally studied in this work. Rotating and static dipping tests of MgO–C refractory in CaO–SiO2–Al2O3–MgO–FeO slags are conducted, and the effects of composition of slag, carbon in refractory, and rotation speed on the corrosion behavior are investigated. Results show that the corrosion depth of the MgO–C refractory increases with FeO content of slag and rotation speed of MgO–C rod, whereas it decreases with an increase in slag basicity. Slag notably penetrates the surface layer of MgO–C refractory after the carbon is oxidized, causing an aggravation of the corrosion. Moreover, the corrosion mechanism of MgO–C refractory in molten slag during the refining process is studied and illustrated in this work.

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“…This effect has been mitigated since the development of magnesia-carbon (MgO-C) refractory in the 1970s, whereby the thermal properties of magnesia have been controlled and improved. A high thermal conductivity, excellent thermal shock resistance, as well as good corrosion resistance can be achieved in this kind of refractory [6][7][8][9][10][11][12][13]. Therefore, the mechanical and chemical properties exhibited by carbon-containing refractories have allowed them to be widely used to form specific compounds for certain applications in the steel industry.…”

Section: Introductionmentioning

confidence: 99%

Development of an Ultra-Low Carbon MgO Refractory Doped with α-Al2O3 Nanoparticles for the Steelmaking Industry: A Microstructural and Thermo-Mechanical Study

Gómez-Rodríguez

Castillo-Rodríguez

Rodríguez-Castellanos

et al. 2020

Materials

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The effect of α-Al2O3 nanoparticles (up to 5 wt.%) on the physical, mechanical, and thermal properties, as well as on the microstructural evolution of a dense magnesia refractory is studied. Sintering temperatures at 1300, 1500, and 1600 °C are used. The physical properties of interest were bulk density and apparent porosity, which were evaluated by the Archimedes method. Thermal properties were examined by differential scanning calorimetry. The mechanical behavior was studied by cold crushing strength and microhardness tests. Finally, the microstructure and mineralogical qualitative characteristics were studied by scanning electron microscopy and X-ray diffraction, respectively. Increasing the sintering temperature resulted in improved density and reduced apparent porosity. However, as the α-Al2O3 nanoparticle content increased, the density and microhardness decreased. Microstructural observations showed that the presence of α-Al2O3 nanoparticles in the magnesia matrix induced the magnesium-aluminate spinel formation (MgAl2O4), which improved the mechanical resistance most significantly at 1500 °C.

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Corrosion Study of MgO-C Bricks in Contact with a Steelmaking Slag

Cited by 22 publications

References 6 publications

Corrosion Tests for Refractory Materials Intended for the Steel Industry - A Review

Corrosion Tests for Refractory Materials Intended for the Steel Industry - A Review

Corrosion Behavior of MgO–C Ladle Refractory by Molten Slag

Development of an Ultra-Low Carbon MgO Refractory Doped with α-Al2O3 Nanoparticles for the Steelmaking Industry: A Microstructural and Thermo-Mechanical Study

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