Thermodynamic Calculation of Corrosion and Slag Resistance Mechanism of Alumina-chrome Bricks

doi:10.19691/j.cnki.1004-4493.2026.03.008

China's Refractories ›› 2026, Vol. 35 ›› Issue (3): 46-51.DOI: 10.19691/j.cnki.1004-4493.2026.03.008

Thermodynamic Calculation of Corrosion and Slag Resistance Mechanism of Alumina-chrome Bricks

YE Xinnan¹, ZHANG Yongzhi^2,*, WANG Han², GAO Ruifa¹, YIN Hongji², HU Jisheng¹, LI Kunpeng², ZHANG Xiaojie¹, WU Gang²

1 China Nuclear Power Engineering Co., Ltd., Beijing 100035, China;
2 Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, China

Received:2026-08-15 Published:2026-09-29
Contact: *e-mail: lyzhangyongzhi@163.com
About author:Ye Xinnan, born in 1990, received his bachelor’s degree from Harbin Engineering University in 2012. He is currently a senior engineer at China Nuclear Power Engineering Co., Ltd. (CNPE), where he has been dedicated to the research and engineering practice of radioactive waste treatment systems. His work encompasses the processing and management of radioactive liquid, gaseous, and solid wastes generated in nuclear facilities, with a focus on system design, process optimization, and engineering implementation.

Abstract

Abstract: To improve the service life of high-temperature melting furnaces for treating low- and intermediate-level radioactive waste, high-temperature melt was prepared by simulating the typical waste composition, and the microstructural changes and corrosion of alumina-chrome refractory materials before and after exposure to the high-temperature melt were analyzed using FactSage thermodynamic calculations combined with static crucible slag resistance tests, along with SEM and EDS characterization. The results indicate that the corrosion of alumina-chrome refractories by the high-temperature melt mainly involves the dissolution of corundum, zirconia, alumina-chromia solid solution, and chromia crystals, as well as melt penetration into the brick. As the chromia content increases, the corrosion resistance improves while the penetration resistance decreases. The nepheline formation accelerates the melting of Al₂O₃ in the bricks. The dissolution of various components in alumina-chrome bricks follows the order Al₂O₃>ZrO₂>Cr₂O₃. Na₂O and SiO₂ in the high-temperature melt exhibit the strongest penetration.

Key words: low- and intermediate-level radioactive waste, high-temperature melt, alumina-chrome, corrosion, thermodynamics

YE Xinnan, ZHANG Yongzhi, WANG Han, GAO Ruifa, YIN Hongji, HU Jisheng, LI Kunpeng, ZHANG Xiaojie, WU Gang. Thermodynamic Calculation of Corrosion and Slag Resistance Mechanism of Alumina-chrome Bricks[J]. China's Refractories, 2026, 35(3): 46-51.

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Thermodynamic Calculation of Corrosion and Slag Resistance Mechanism of Alumina-chrome Bricks

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