Effect of H2O2 Addition on Anti-explosion Performance of ρ-Al2O3 Bonded Corundum Castables

doi:10.19691/j.cnki.1004-4493.2023.01.003

China's Refractories ›› 2023, Vol. 32 ›› Issue (1): 14-19.DOI: 10.19691/j.cnki.1004-4493.2023.01.003

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Effect of H₂O₂ Addition on Anti-explosion Performance of ρ-Al₂O₃ Bonded Corundum Castables

WANG Huan, WANG Zhanmin*, FENG Haixia, CAO Yingnan, LIU Jun, XU Yingshun

State Key Laboratory of Advanced Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, China

Online:2023-03-15 Published:2023-03-22
Contact: *e-mail: wangzm@lirrc.com
About author:Wang Huan, born in 1996, obtained his master's degree from Sinosteel Luoyang Institute of Refractories Research Co., Ltd. in 2021, majoring in material science and engineering. His research interest covers Al<sub>2</sub>O<sub>3</sub> based refractory castables.

Abstract

Abstract: In order to improve the anti-explosion performance of ρ-Al₂O₃ bonded corundum castables, H₂O₂ was added (0, 0.025%, 0.050%, 0.075%, 0.100% and 0.125%, by mass) as the anti-explosion agent. After mixing and casting, specimens were prepared. Some specimens were cured at room temperature for 12 h and demoulded for the anti-explosion performance test at different temperatures (450, 500, 550, 600, 650, 700, 750 and 800 ℃); the other specimens were cured, dried and fired, and tested in terms of the apparent porosity, the density, the cold mechanical properties, the air permeability and the pore size distribution. The results show that: (1) with the increase of the H₂O₂ addition, the anti-explosion performance of castables increases gradually, the average pore size increases gradually, and the density and the strength decrease gradually; (2) by comprehensive consideration, the appropriate addition of H₂O₂ shall be within 0.075%.

Key words: hydrogen peroxide, ρ-alumina, corundum castables, anti-explosion performance, air permeability, pore size distribution

WANG Huan, WANG Zhanmin, FENG Haixia, CAO Yingnan, LIU Jun, XU Yingshun. Effect of H₂O₂ Addition on Anti-explosion Performance of ρ-Al₂O₃ Bonded Corundum Castables[J]. China's Refractories, 2023, 32(1): 14-19.

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Effect of H₂O₂ Addition on Anti-explosion Performance of ρ-Al₂O₃ Bonded Corundum Castables

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