In-situ improved corrosion resistance of corundum-mullite refractory for the incineration of hazardous spent high-salt organic liquor by Cr2O3: Interfacial anti-erosion mechanism

Han, Gaorong; Wang, Zhixiao; Liu, Bingbing; Huang, Yanfang; Su, Shi‐Lei

doi:10.1016/j.ceramint.2022.01.104

Cited by 5 publications

(3 citation statements)

References 40 publications

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“…The pore size distributions (a) and cumulative pore volume (b) as a function of pore diameter for various samples after drying at 110°C for 24 h are shown in Figure 7. As is known that micron‐sized pores (1–10 µm) in the samples are composed of intra‐particle pores (1–2 µm) and inter‐particle pores (2–10 µm), and the size range of submicron‐sized pores is (.01–1 µm) 35–37 . The pores with the diameters of 2–10 µm range were formed from the packing flaws between the different particles, that is, inter‐particle pores.…”

Section: Resultsmentioning

confidence: 99%

“…As is known that micron-sized pores (1-10 µm) in the samples are composed of intra-particle pores (1-2 µm) and inter-particle pores (2-10 µm), and the size range of submicron-sized pores is (.01-1 µm). [35][36][37] The pores with the diameters of 2-10 µm range were formed from the packing flaws between the different particles, that is, inter-particle pores.…”

Section: Pore Characteristicsmentioning

confidence: 99%

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Optimization of corrosion resistance and mechanical properties of Al₂O₃‐Cr₂O₃ refractories for waste incinerator

An,

Liu,

Wang

et al. 2023

Int J Applied Ceramic Tech

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The corrosion resistance and mechanical properties directly affects the operation and service life of Al2O3‐Cr2O3 refractories used in waste incinerators. In this study, ZrO2 particles were introduced via vacuum impregnation to adjust microstructure and properties of Al2O3‐Cr2O3 refractories. The results showed that the impregnated ZrO2 particles and increasing impregnation times resulted in the decreased median pore size and increased compactness, and mechanical strengths of refractories were elevated from the inhibited cracks propagation by ZrO2 particles. The decreased amounts of large pores and increased amounts of small pores from the filled ZrO2 particles inhibited penetration of low melting point phases, and the formed CaZrO3 phase from the reactions between corrosion reagent and ZrO2 particles increased the viscosity of penetrated corrosion reagent, resulting in the decreased penetration index from 8.57% to 2.58%. Meanwhile, the filled ZrO2 particles around alumina particles prevented reactions between molten corrosion reagent and alumina, leading to the decreased corrosion index from 3.78% to .74%. The decreased pore size and formation of CaZrO3 phase were primary factors that enhanced the penetration resistance. And formation of wrapped layers from ZrO2 particles around alumina particles presented prominent effects on the strengthened corrosion resistance of Al2O3‐Cr2O3 refractories.

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Section: Resultsmentioning

confidence: 99%

Section: Pore Characteristicsmentioning

confidence: 99%

Optimization of corrosion resistance and mechanical properties of Al₂O₃‐Cr₂O₃ refractories for waste incinerator

An,

Liu,

Wang

et al. 2023

Int J Applied Ceramic Tech

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show abstract

“…[20][21][22][23] In the sintering of ceramics through liquid phase sintering, particularly SiC, the addition of Cr 2 O 3 has been found to inhibit the formation of the liquid phase. [24][25][26][27] Therefore, Cr 2 O 3 additives may be a viable option as filler sand materials for high-Mn and high-Al steels (w[Mn] ≥ 10 pct and w[Al] ≥ 2 pct).…”

Section: Introductionmentioning

confidence: 99%

Effect of Cr₂O₃ Addition on Sintering Behavior of Novel Chromite‐Based Ladle Filler Sand

Li,

Kong,

Zang

2023

steel research int.

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Developing novel filler sands has garnered significant interest in improving the ladle’s free‐opening rate and enhancing the cleanliness of high‐Mn and high‐Al steel. Laboratory studies explored the effect of adding Cr2O3 powder on the sintering behavior of chromite‐based ladle filler sands. Furthermore, interfacial phenomena were examined between the sands and high‐Mn and high‐Al steel grades, varying in Mn contents. The results demonstrate that adding Cr2O3 power played a role in inhibiting the liquid phase formation in the filler sand. With a 16% addition, the steel (Mn mass%=30) reacted with the sand, leading to the shape of a spinel phase (SP), specifically (Mn, Fe, Mg)O·(Al, Cr)2O3, which facilitated the separation of the liquid phase. The reduction of FeO to Fe by Mn, Al, and C in steel, especially Al, was hindered by adding Cr2O3, resulting in a suitable sintering degree that ultimately benefited ladle free‐opening. SiO2 is crucial for forming the liquid phase during the sintering process. The SiO2 content of the sand should be about 20% to achieve optimal sintering effects. Chromite sand for casting is not suitable for the high‐Mn and high‐Al steels. The mixed sand composition presented in the current study demonstrates potential as a suitable filler sand material for high‐Mn and high‐Al (20 ≤ Mn mass% ≤ 30) steel.This article is protected by copyright. All rights reserved.

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Catalytic carbon-bed sintering of CNTs/calcium aluminate cement and its effects on thermal mechanical properties of refractory castables

Lei,

Ding,

Xiao

et al. 2023

Ceramics International

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In-situ improved corrosion resistance of corundum-mullite refractory for the incineration of hazardous spent high-salt organic liquor by Cr2O3: Interfacial anti-erosion mechanism

Cited by 5 publications

References 40 publications

Optimization of corrosion resistance and mechanical properties of Al₂O₃‐Cr₂O₃ refractories for waste incinerator

Optimization of corrosion resistance and mechanical properties of Al₂O₃‐Cr₂O₃ refractories for waste incinerator

Effect of Cr₂O₃ Addition on Sintering Behavior of Novel Chromite‐Based Ladle Filler Sand

Catalytic carbon-bed sintering of CNTs/calcium aluminate cement and its effects on thermal mechanical properties of refractory castables

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In-situ improved corrosion resistance of corundum-mullite refractory for the incineration of hazardous spent high-salt organic liquor by Cr2O3: Interfacial anti-erosion mechanism

Cited by 5 publications

References 40 publications

Optimization of corrosion resistance and mechanical properties of Al2O3‐Cr2O3 refractories for waste incinerator

Optimization of corrosion resistance and mechanical properties of Al2O3‐Cr2O3 refractories for waste incinerator

Effect of Cr2O3 Addition on Sintering Behavior of Novel Chromite‐Based Ladle Filler Sand

Catalytic carbon-bed sintering of CNTs/calcium aluminate cement and its effects on thermal mechanical properties of refractory castables

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Product

Resources

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Optimization of corrosion resistance and mechanical properties of Al₂O₃‐Cr₂O₃ refractories for waste incinerator

Optimization of corrosion resistance and mechanical properties of Al₂O₃‐Cr₂O₃ refractories for waste incinerator

Effect of Cr₂O₃ Addition on Sintering Behavior of Novel Chromite‐Based Ladle Filler Sand