Effect of Spinel-Coated Aggregates on Thermal Shock Resistance and Cement Clinker Corrosion Resistance of Magnesia Spinel Refractories

被引：0
|
作者：
Zhu F. [1 ]
Dai Y. [1 ]
Yan W. [1 ]
Xu Y. [1 ]
Wang D. [1 ]
Wang C. [1 ]
机构：
[1] Wuhan University of Science and Technology, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuha
来源：
Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 03期
关键词：
coating structured aggregates; corrosion/penetration resistance; magnesia–alumina spinel refractories; nondestructive testing methods; thermal shock stability;
D O I：
10.14062/j.issn.0454-5648.20220822
中图分类号：
学科分类号：
摘要：
Cement rotary kilns using refractories require excellent refractoriness, thermal shock stability and corrosion resistance due to the cyclic rotation and feeding–discharging of cement clinker. In this paper, a kind of magnesia–alumina spinel refractory containing coating structured aggregates were prepared by wrapping spinel fines on the surface of magnesia aggregates. The fracture behavior and corrosion resistance of prepared refractories were characterized by three-point bending test combined with digital image correlation, acoustic emission technique, and static slag resistance method. The results indicate that by changing the distribution of spinel to make coating structure aggregates, the alumina content is effectively reduced while a more uniform and extensive distribution of spinel phase is achieved. Compared with the merchant magnesia–alumina spinel refractory (10% Al2O3) with pre-synthetic spinel aggregates, the magnesia–alumina spinel refractory (5% Al2O3) with spinel coating aggregates has the improved mechanical strength and corrosion resistance, and maintains the thermal shock resistance. © 2023 Chinese Ceramic Society. All rights reserved.
引用
收藏
页码：658 / 668
页数：10
相关论文
共 25 条
  • [1] LI Guohua, TIAN Zhiqiang, CHEN Shujiang, Et al., Mater Rep(in Chinese), 28, S1, pp. 328-330, (2014)
  • [2] ZHOU W, YAN W, MA S, Et al., Degradation mechanisms of periclase-magnesium aluminate spinel refractory bricks used in the upper transition zone of a cement rotary kiln, Constr Build Mater, 272, (2021)
  • [3] TONG S, ZHAO J, ZHANG Y, Et al., Corrosion mechanism of Al–MgO–MgAl<sub>2</sub>O<sub>4</sub> refractories in RH refining furnace during production of rail steel, Ceram Int, 46, 8, pp. 10089-10095, (2020)
  • [4] LIU Xijun, Refractories(in Chinese), 34, 2, pp. 112-114, (2000)
  • [5] CHEN Na, The preparation of periclase–spinel refractories and the study for its cement clinker coating performance, (2013)
  • [6] LIU G, LI N, YAN W, Et al., Composition and microstructure of a periclase-composite spinel brick used in the burning zone of a cement rotary kiln[J], Ceram Int, 40, 6, pp. 8149-8155, (2014)
  • [7] WANG Houzhi, GU Huazhi, WU Yunxiang, Et al., J Wuhan Univ Sci Technol(in Chinese), 14, 2, pp. 172-177, (1991)
  • [8] ZHANG Pingxuan, HU Fan, J Wuhan Univ Sci Technol(in Chinese), 3, pp. 245-247, (1999)
  • [9] DAI Y, LI Y, JIN S, Et al., Mechanical and fracture investigation of magnesia refractories with acoustic emission-based method[J], J Eur Ceram Soc, 40, 1, pp. 181-191, (2020)
  • [10] ZHANG Daoyun, XIAO Guoqing, JIANG Mingxue, Et al., Refractories(in Chinese), 46, 4, pp. 249-253, (2012)
123