Effects of Four Kinds of Alumina Micropowder on Properties of Al2O3-C Refractories

doi:10.19691/j.cnki.1004-4493.2022.04.007

China's Refractories ›› 2022, Vol. 31 ›› Issue (4): 34-38.DOI: 10.19691/j.cnki.1004-4493.2022.04.007

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Effects of Four Kinds of Alumina Micropowder on Properties of Al₂O₃-C Refractories

SHEN Mingke^*, LUO Ming, HU Chengyang, YU Yan, SONG Yanan, NI Feijiang, LI Jin

Zhejiang Zili High Temperature Technology Co., Ltd., Shaoxing 312300, China

Online:2022-12-15 Published:2022-12-23
Contact: * e-mail: mkshen@ziliref.com
About author:Shen Mingke, a senior engineer , graduated from Wuhan University of Science and Technology with a master'sdegree, now is working in Zhejiang zili High Temperature Technology Co., Ltd. He is mainly responsible for theresearch and development, design, application and after-sales service of monolithic refractory products. He hasobtained 17 invention patents and 37 utility model patents, and published 13 Chinese core papers.

Abstract

Abstract: In order to further improve the strength and the thermal shock resistance of Al₂O₃-C materials for steel ladle slide gates, the effects of four kinds of alumina micropowders (unimodal activated alumina micropowder 07RAL, unimodal activated alumina micropowder 15RA, bimodal activated alumina micropowder 22RABL, and calcined alumina micropowder 40CA) on the density, the strength and the thermal shock resistance of Al₂O₃-C materials were studied. The results show that the density, the strength and the thermal shock resistance of Al₂O₃-C materials can be improved with the introduction of activated alumina micropowders. Among them, the specimen with bimodal activated alumina micropowder shows the best comprehensive performance, especially the hot modulus of rupture. Its actual application results in steel mills show that the average service life of the Al₂O₃-C slide plates prolongs, and the problems of cast hole reaming, plate oxidation, roughening and cracking during the use of slide plates are obviously improved.

Key words: alumina micropowder, continuous casting, steel ladle, slide gate, alumina-carbon materials

SHEN Mingke, LUO Ming, HU Chengyang, YU Yan, SONG Yanan, NI Feijiang, LI Jin. Effects of Four Kinds of Alumina Micropowder on Properties of Al₂O₃-C Refractories[J]. China's Refractories, 2022, 31(4): 34-38.

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Effects of Four Kinds of Alumina Micropowder on Properties of Al₂O₃-C Refractories

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