Comparison study of slag corrosion resistance of MgO–MgAl2O4, MgO–CaO and MgO–C refractories under electromagnetic field

Ren, Xiaoyan; Ma, Beiyue; Li, Shiming; Li, Hongxia; Liu, Guoqi; Yang, Wengang; Fan, Qunbo; Zhao, Shixian; Yu, Jingkun

doi:10.1007/s42243-020-00421-0

Cited by 69 publications

(5 citation statements)

References 31 publications

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“…However, the relatively high apparent porosity and large pore size of the porous aggregate are unfavorable to the slag penetration resistance of the lightweight refractory. 23, 24 Fu et al 25 used the pore-forming agent addition method to prepare microporous corundum aggregates with a relatively high bulk density (3.05−3.43 g/cm 3 ) and a total porosity ranging from 14.9% to 23.0%. However, the bulk density (2.82 g/cm 3 ) of the Al 2 O 3 -MgO refractory castables using the microporous aggregates is comparable to that of dense castables (2.92 g/cm 3 ), 17 resulting in a low degree of lightweight; and the reduction in thermal conductivity is limited (∼6%).…”

Section: Introductionmentioning

confidence: 99%

“…used an in‐situ decomposition technique to fabricate porous periclase‐spinel aggregates, which exhibited an apparent porosity of 58.2%, a pore size in the .1–30 μm range, and a compressive strength of 15.2 MPa. However, the relatively high apparent porosity and large pore size of the porous aggregate are unfavorable to the slag penetration resistance of the lightweight refractory 23,24 . Fu et al 25 .…”

Section: Introductionmentioning

confidence: 99%

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Properties and microstructures of porous corundum‐spinel aggregates fabricated via the Kirkendall effect

He,

Mi,

Chen

et al. 2024

Int J Applied Ceramic Tech

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Four porous corundum‐spinel aggregates were prepared from magnesia and α‐Al2O3 micropowder via the Kirkendall effect. Effects of the particle size of magnesia (PSM, 0–74 μm, 0–15 μm, and 0–44 μm) and firing temperature (1100–1600°C) on the phase compositions, microstructures, pore characteristics of the prepared porous aggregates were investigated. As the firing temperature increased, the PSM influenced the reaction rate of magnesia and alumina, and the sintering process, leading to remarkable changes in the phase compositions, porosity, and microstructure with a negligible impact on the pore size distribution. As the PSM decreased from 0–74 μm to 0–15 μm, the apparent porosity initially increased and then decreased. Relatively compact cyclic spinels formed around the Kirkendall pores in aggregates with 0–74 μm and 0–44 μm magnesia added after fired at 1600°C, as the expansion of spinel formation was inhibited by the high strength of the alumina matrix. Finally, the optimized product is an aggregate with 0–44 μm magnesia added, which exhibits a high total porosity of 32.4%, a low bulk density of 2.69 g/cm3, and a thermal conductivity of 2.178 W/(m·K) at 1000°C, as well as a high compressive strength of 302.5 MPa and a small median pore size of .46 μm. This work provides a promising technique for preparing porous‐corundum‐based aggregates.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Properties and microstructures of porous corundum‐spinel aggregates fabricated via the Kirkendall effect

He,

Mi,

Chen

et al. 2024

Int J Applied Ceramic Tech

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“…Magnesia refractory materials have the characteristics of high melting point and high refractoriness [1] and can be used as the main lining materials of oxygen converters [2][3][4][5][6][7]. Meanwhile, the nature of slags is critical to the quality of manufactured steels.…”

Section: Introductionmentioning

confidence: 99%

Effect of Al₂O₃/TiO₂/Na₂O component in steelmaking slag on the corrosion of MgO refractories

Zhang

et al. 2023

Ironmaking & Steelmaking

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The influence of Al 2 O 3 /TiO2/Na 2 O component in steelmaking slag on the corrosion rate and mechanism of MgO refractories is significant for promoting the development of non-fluorine fluxes in steelmaking processes. In this study, static method was used to analyze the effects of Al 2 O 3 /TiO 2 /Na 2 O components on the corrosion rate of MgO refractory, which was characterized by measuring the MgO content in the final slag after the same reaction time. The results showed the corrosion rate of the MgO refractory was controlled by the diffusion of FetO in the slag to the crucible and the chemical reaction of MgO with FetO. When the amount of each oxide was less than 15%, the ability of the slags to corrode the MgO refractory material were as follows: Na 2 O

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“…MgO-C (magnesia-graphite) refractories are widely used in key parts of metallurgical kilns, such as converter lining, ladle slag line, and electric arc furnace lining, due to their excellent high-temperature stability and slag resistance. [1][2][3][4][5] However, with the continuous development of a new generation of high-quality steel grades such as interstitialfree steel, the requirements for MgO-C refractories are getting higher and higher. To avoid carbon pick-up pollution to molten steel, moderately reducing the carbon content in MgO-C refractories is an effective strategy.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Al₂O₃‐SiC powder from electroceramics waste and its application in low‐carbon MgO‐C refractories

Ren

Zhi

et al. 2021

Int J Applied Ceramic Tech

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Composite additives are an efficient means to improve the high‐temperature stability and slag resistance of low‐carbon MgO‐C refractories. In this work, Al2O3‐SiC powder was firstly synthesized from electroceramics waste by carbon embedded method at 1500°C, 1550°C, and 1600°C for 4 h, and then the as‐synthesized Al2O3‐SiC powder was used as an additive to low‐carbon MgO‐C refractories. The effects of its addition amounts of 0, 2.5 wt.%, 5.0 wt.%, and 7.5 wt.% on the properties of the refractories were investigated in detail. It was found that increasing the heat treatment temperature is beneficial to the phase conversion of mullite and quartz to alumina and silicon carbide in the electroceramics waste. Furthermore, the addition of Al2O3‐SiC powder effectively improves the performance of low‐carbon MgO‐C samples, and the formation of spinel dense layer and high‐viscosity isolation layer is the internal reason for the improvement of the oxidation resistance and slag resistance of low‐carbon MgO‐C samples. This work provides ideas for the reuse of electroceramics waste and presents an alternative strategy for the performance optimization of low‐carbon MgO‐C refractories.

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Comparison study of slag corrosion resistance of MgO–MgAl2O4, MgO–CaO and MgO–C refractories under electromagnetic field

Cited by 69 publications

References 31 publications

Properties and microstructures of porous corundum‐spinel aggregates fabricated via the Kirkendall effect

Properties and microstructures of porous corundum‐spinel aggregates fabricated via the Kirkendall effect

Effect of Al₂O₃/TiO₂/Na₂O component in steelmaking slag on the corrosion of MgO refractories

Synthesis of Al₂O₃‐SiC powder from electroceramics waste and its application in low‐carbon MgO‐C refractories

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Comparison study of slag corrosion resistance of MgO–MgAl2O4, MgO–CaO and MgO–C refractories under electromagnetic field

Cited by 69 publications

References 31 publications

Properties and microstructures of porous corundum‐spinel aggregates fabricated via the Kirkendall effect

Properties and microstructures of porous corundum‐spinel aggregates fabricated via the Kirkendall effect

Effect of Al2O3/TiO2/Na2O component in steelmaking slag on the corrosion of MgO refractories

Synthesis of Al2O3‐SiC powder from electroceramics waste and its application in low‐carbon MgO‐C refractories

Contact Info

Product

Resources

About

Effect of Al₂O₃/TiO₂/Na₂O component in steelmaking slag on the corrosion of MgO refractories

Synthesis of Al₂O₃‐SiC powder from electroceramics waste and its application in low‐carbon MgO‐C refractories