A novel route to enhance high-temperature mechanical property and thermal shock resistance of low-carbon MgO-C bricks by introducing ZrSiO4

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外文摘要：Conventional MgO-C bricks(graphite content＞14 wt.％)produce a great deal of greenhouse gas emission,while low-carbon MgO-C bricks have serious thermal shock resistance during high-temperature service.To enhance the high-temperature mechanical property and thermal shock resistance of low-carbon MgO-C bricks,a novel route of introducing ZrSiO4 powder into low-carbon MgO-C bricks was reported in such refractories with 2 wt.％flaky graphite.The results indicate that the low-carbon MgO-C brick with 0.5 wt.％ZrSiO4 addition has the maximum hot modulus of rupture at 1400 ℃ and the corresponding specimen fired in the carbon embedded atmosphere has the maximum residual strength ratio(98.6％)after three thermal shock cycles.It is found that some needle-like A1ON and plate-like Al2O3-ZrO2 composites were in situ formed in the matrices after the low-carbon MgO-C bricks were coked at 1400 ℃,which can enhance the high-temperature mechanical property and thermal shock resistance due to the effect of fiber toughening and particle toughening.Moreover,CO2 emission of the newly developed low-carbon MgO-C bricks is reduced by 58.3％per ton steel after using them as the working lining of a 90 t vacuum oxygen decarburization ladle.

外文关键词：

Low-carbon MgO-C brickZrSiO4Synergistic toughening effectHigh-temperature mechanical propertyThermal shock resistanceVacuum oxygen decarburization ladle

作者：

Chun-hui Sun、Ling-ling Zhu、Hao Yan、Wei Zhao、Jing-xuan Liu、Lin Ren、Xian-tang Zhao、Xiao-song Tong、Shu-wen Yu

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作者单位：

Beijing Lirr High-Temperature Materials Co.,Ltd.,Beijing 102211,China

School of Materials Science and Engineering,Henan Province Industrial Technology Research Institute of Resources and Materials,Zhengzhou University,Zhengzhou 450001,Henan,China

School of Chemistry and Chemical Engineering,Suzhou University,Suzhou 234000,Anhui,China

基金：

Enterprise Research and Development Project of Beijing Lirr High-Temperature Materials Co.,LtdKey Scientific Research Project for Universities and Colleges in Henan ProvinceExcellent Youth Research Project of Anhui ProvincePhD Research Funding of Suzhou University

项目编号：

2020-0219A4300282022AH0301352021BSK041

出版年：

2024

DOI：

10.1007/s42243-023-01063-8

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCD

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2024.31(6)