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10.3390/ma15196779
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Article

Reaction Mechanism of CA6, Al2O3 and CA6-Al2O3 Refractories with Refining Slag

by
Jie Liu
1,
Zheng Liu
2,
Jisheng Feng
3,
Bin Li
1,*,
Junhong Chen
1,*,
Bo Ren
1,
Yuanping Jia
3 and
Shu Yin
4,5
1
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
2
Angang Construction Consortium Co., Ltd., Anshan 114001, China
3
ZiBo City LuZhong Refractory Co., Ltd., Zibo 255000, China
4
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1Katahira, Aoba-ku, Sendai 980-8577, Japan
5
Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
*
Authors to whom correspondence should be addressed.
Materials 2022, 15(19), 6779; https://doi.org/10.3390/ma15196779
Submission received: 30 August 2022 / Revised: 18 September 2022 / Accepted: 23 September 2022 / Published: 30 September 2022
(This article belongs to the Special Issue Feature Papers in Refractories and Ceramics: Microstructure, Properties and Applications)
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Abstract

In this study, to clarify the corrosion mechanism of CA6 based refractory by refining slag, the static crucible tests for CA6, CA6-Al2O3, and Al2O3 refractory, were carried out and the detail reaction processes were analyzed from the perspective of thermodynamic simulation and structural evolution. From the results, CaAl4O7 plays a vital role in the slag corrosion resistance of the three refractories. Regarding CA6 refractory, the double pyramid module in CA6 crystal structure was destroyed very quickly, leading to the rapid collapse of its structure to form the denser CaAl4O7 in high amounts. As a result, a reaction layer mainly composed of CaAl4O7 formed, which effectively inhibited the slag corrosion, so CA6 refractory exhibits the most excellent slag corrosion. Meanwhile, the formation of CaAl4O7 can also avoid CA6 particles entering the molten steel to introduce exogenous inclusions. For Al2O3 refractory, the generation of CaAl4O7 is much slower than that of CA6 and CA6-Al2O3 refractory, and the amount generated is also quite small, resulting in its worst slag corrosion among the three crucibles. Therefore, CA6 based refractory has excellent application potential in ladle refining and clean steel smelting.
Keywords: corrosion resistance; refining slag; refractory; thermodynamic simulation corrosion resistance; refining slag; refractory; thermodynamic simulation

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MDPI and ACS Style

Liu, J.; Liu, Z.; Feng, J.; Li, B.; Chen, J.; Ren, B.; Jia, Y.; Yin, S. Reaction Mechanism of CA6, Al2O3 and CA6-Al2O3 Refractories with Refining Slag. Materials 2022, 15, 6779. https://doi.org/10.3390/ma15196779

AMA Style

Liu J, Liu Z, Feng J, Li B, Chen J, Ren B, Jia Y, Yin S. Reaction Mechanism of CA6, Al2O3 and CA6-Al2O3 Refractories with Refining Slag. Materials. 2022; 15(19):6779. https://doi.org/10.3390/ma15196779

Chicago/Turabian Style

Liu, Jie, Zheng Liu, Jisheng Feng, Bin Li, Junhong Chen, Bo Ren, Yuanping Jia, and Shu Yin. 2022. "Reaction Mechanism of CA6, Al2O3 and CA6-Al2O3 Refractories with Refining Slag" Materials 15, no. 19: 6779. https://doi.org/10.3390/ma15196779

APA Style

Liu, J., Liu, Z., Feng, J., Li, B., Chen, J., Ren, B., Jia, Y., & Yin, S. (2022). Reaction Mechanism of CA6, Al2O3 and CA6-Al2O3 Refractories with Refining Slag. Materials, 15(19), 6779. https://doi.org/10.3390/ma15196779

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