Chemical corrosion behavior of chrome-free SiC-MgAl2O4 composites under simulated coal-water gasification conditions

Sun, Honggang; Li, Hongxia; Chen, Liugang; Xia, Miao; Si, Yaochen; Shang, Xinlian; Du, Yong; Zhao, Shixian

doi:10.1016/j.corsci.2022.110560

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…One can infer that the formation of the dense layer is due to the liquid and vapor phase assisted reactions with Al 3 BC 3 –Al additions. The expansile nature of the spinel reaction further tightened the microstructure and the highly dense layers were formed with liquid phase 53 . According to Figures 4 and 5, no obvious change was found for O.I.…”

Section: Resultsmentioning

confidence: 96%

“…The expansile nature of the spinel reaction further tightened the microstructure and the highly dense layers were formed with liquid phase. 53 According to Figures 4 and 5, no obvious change was found for O.I. values and phase composition of specimens MAB3 and MAB4 after testing at higher than 1100 • C, which means that the generation of dense protect layer was almost done as low as this temperature.…”

Section: Specimens Mac Mab4mentioning

confidence: 84%

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Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al₃BC₃–Al antioxidants: A synergistic effect

Wang

Deng

et al. 2023

J Am Ceram Soc.

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The synergistic effects of Al3BC3–Al antioxidants on optimizing the oxidation resistance of low‐carbon MgO–C refractories were investigated. The results indicated that the oxidation index and rate constant of low‐carbon MgO–C refractories with optimized Al3BC3–Al additions were 13% and 1.10 × 10−4 cm2 min−1 at 1400°C for 3 h, respectively, which is much lower than that of Al or Al3BC3 containing ones. Single Al3BC3 is not a suitable antioxidant for low‐carbon MgO–C refractories; however, if Al3BC3 was initially protected and Al reacted as the antioxidant, enhanced oxidation resistance at high temperature can be achieved. The formation of dense MgO–MgAl2O4–Mg3B2O6 layer contributed to superior oxidation resistance, and the temperature for the generation of this layer was as low as 1100°C due to liquid and vapor phase–assisted reactions with Al3BC3–Al. Furthermore, a self‐repairing function was achieved at 1600°C with the combination of Al3BC3–Al additions in spite of the faster oxidation rate.

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Section: Resultsmentioning

confidence: 96%

Section: Specimens Mac Mab4mentioning

confidence: 84%

Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al₃BC₃–Al antioxidants: A synergistic effect

Wang

Deng

et al. 2023

J Am Ceram Soc.

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“…In recent years, researchers have begun to study chromium‐free refractories for copper‐smelting furnace lining, mainly focusing on the development of magnesia‐alumina spinel materials 21–24 . For instance, Quan et al 21 .…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, researchers have begun to study chromium-free refractories for copper-smelting furnace lining, mainly focusing on the development of magnesiaalumina spinel materials. [21][22][23][24] For instance, Quan et al 21 reported that copper slag reacted with spinel materials to form a reaction layer (MgFe 2 O 4 and Mg 2 SiO 4 ) that prevented penetration. However, the intergranular binding phase CaMgSiO 4 dissolved in the slag during slag erosion, which provided penetration paths for the copper slag.…”

Section: Introductionmentioning

confidence: 99%

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag

Jin,

Ding,

Zhang

et al. 2024

J Am Ceram Soc.

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The penetration of copper‐smelting slag into refractories is a major challenge to the research of chromium‐free refractories for copper‐smelting furnace. In this paper, Y2O3 was added to regulate the pore structure of periclase refractories, which enhanced their various properties, especially corrosion resistance to copper converter slag. The results showed that the periclase refractories doped with 1.0 wt.% Y2O3 (1Y sample) possessed the optimum properties. Compared to the sample without Y2O3, the apparent porosity of 1Y sample was decreased by 7.3%, and its average pore diameter was only 3.7 μm. The addition of Y2O3 filled the pores among MgO grains and promoted the expansion of high melting point silicates, thereby reducing the pore size and causing more complex pore structures. This was beneficial to improving the corrosion resistance of periclase to copper slag, especially to prevent the penetration of Cux+ and Na+. After static slag corrosion, the permeability index was significantly decreased by 41% compared to periclase refractories without Y2O3. Moreover, compared to industrial MgO–Cr2O3 refractories, the 1Y sample possessed better resistance to copper slag erosion based on rotating finger tests, and its permeability index and penetration depth decreased by almost 50%.

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Phase evolution and microstructure of SiC–MgAl2O4–Al composites sintered in argon atmosphere at 1450 °C: Reactions in Al–O–C system

Sun

et al. 2023

Ceramics International

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Chemical corrosion behavior of chrome-free SiC-MgAl2O4 composites under simulated coal-water gasification conditions

Cited by 9 publications

References 23 publications

Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al₃BC₃–Al antioxidants: A synergistic effect

Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al₃BC₃–Al antioxidants: A synergistic effect

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag

Phase evolution and microstructure of SiC–MgAl2O4–Al composites sintered in argon atmosphere at 1450 °C: Reactions in Al–O–C system

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Chemical corrosion behavior of chrome-free SiC-MgAl2O4 composites under simulated coal-water gasification conditions

Cited by 9 publications

References 23 publications

Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al3BC3–Al antioxidants: A synergistic effect

Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al3BC3–Al antioxidants: A synergistic effect

Regulating the pore structure of periclase refractories by adding Y2O3 to enhance corrosion resistance for copper slag

Phase evolution and microstructure of SiC–MgAl2O4–Al composites sintered in argon atmosphere at 1450 °C: Reactions in Al–O–C system

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About

Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al₃BC₃–Al antioxidants: A synergistic effect

Enhanced oxidation resistance of low‐carbon MgO–C refractories with Al₃BC₃–Al antioxidants: A synergistic effect

Regulating the pore structure of periclase refractories by adding Y₂O₃ to enhance corrosion resistance for copper slag