Influence of Matrix Composition on Properties of Lightweight Magnesia-silica Castables

doi:10.19691/j.cnki.1004-4493.2024.04.003

China's Refractories ›› 2024, Vol. 33 ›› Issue (4): 14-18.DOI: 10.19691/j.cnki.1004-4493.2024.04.003

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Influence of Matrix Composition on Properties of Lightweight Magnesia-silica Castables

MENG Qingxin^1,*, GAO Lei², LIU Yabo¹, GUO Qiwei¹, ZHOU Mengxue¹

1 School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China;
2 Sinosteel Luonai Materials Technology Corporation, Luoyang 471039, China

Online:2024-12-15 Published:2024-12-12
Contact: *e-mail: mqx@haust.edu.cn
About author:Meng Qingxin, born in 1973, graduated from Wuhan University of Science and Technology and gained his master's degree in 2007. Now he is working as an engineer in High Temperature Material Institute, Henan University of Science and Technology. He mainly engages in teaching and research of refractories and industry furnaces and kilns.

Abstract

Abstract: To maintain the volume stability of lightweight magnesia-silica castables during heating, lightweight spherical forsterite aggregates (8-5, 5-3, 3-1 and 1-0 mm), pre-synthesized forsterite fine powder (≤0.074 and ≤0.044 mm), natural silica powder (≤0.074 mm), middle grade magnesia fine powder (≤0.074 and ≤0.044 mm) and silica fume were used as the raw materials to prepare lightweight magnesia-silica castables, and the magnesia fine powder and natural silica powder were gradually replaced by pre-synthesized forsterite fine powder (10%, 20%, 30% and 40%, by mass). The properties of the castables were tested and the microstructure was analyzed. The influence of the pre-synthesized forsterite fine powder addition on their properties was researched. The results show that: with the increase of the pre-synthesized forsterite fine powder addition in the matrix, the workability of the castables is almost the same. After being heated at 1 450 ℃ for 3 h, the bulk density of the castables increases, the apparent porosity decreases, the permanent linear change changes from expansion to shrinkage, the cold strengths increase firstly and then decrease, and the thermal conductivity at different temperatures increases. Generally, the optimal pre-synthesized forsterite fine powder addition is 20%.

Key words: lightweight spherical forsterite aggregates, magnesia-silica castables, matrix composition, properties

MENG Qingxin, GAO Lei, LIU Yabo, GUO Qiwei, ZHOU Mengxue. Influence of Matrix Composition on Properties of Lightweight Magnesia-silica Castables[J]. China's Refractories, 2024, 33(4): 14-18.

References

[1] Guo Haizhu, Yu Sen.Handbook of Refractory Raw Materials (in Chinese). Beijing: China Building Materials Industry Press, 2000: 239.
[2] Meng Qingxin, Zhou Ningsheng, Liu Zhao, Ma Jianfeng.Preparation of high-purity forsterite light-weight micropore starting materials. Naihuo Cailiao (Refractories, in Chinese), 2020, 54(1): 56-60.
[3] Deng Chengji, Zhou Liang, Zhu Hongxi, Dingjun. Preparation and properties of forsterite thermal insulation material. Journal of Wuhan University of Science and Technology (in Chinese), 2011, 34(6): 432-435.
[4] Yao Xiaoyun, Li Yousheng, Li Nan.Synthesis of forsterite aggregate and its effect on properties of forsterite refractories. Naihuo Cailiao (Refractories, in Chinese), 2008, 42(3): 205-208.
[5] Zhao Mingtao.The synthesis of light weight forsterite and its application in light weight MgO-SiO₂ castable [Dissertation (in Chinese)]. Luoyang: Henan University of Science and Technology, 2012.
[6] Meng Chao, Meng Qingxin, Li Xiaolong, Cai Xiangyu, Gao Wenke, Chen Qiuyang.Preparation and application of light-weight raw materials from natural forsterite. Naihuo Cailiao (Refractories, in Chinese), 2021, 55(3): 230-234.
[7] Shi Shangzhao, Zhou Ningsheng.Engineering aggregates—The next frontier for high-performance refractories. American Ceramic Society Bulletin, 2015, 94(7): 24-29.
[8] Meng Qingxin, Zhou Ningsheng, Guo Pengwei, Tang Mingyu.Preparation of spherical lightweight forsterite aggregates. Naihuo Cailiao (Refractories, in Chinese), 2019, 53(1): 46-49.
[9] Meng Qingxin, Yu Bingpo, GAO Lei, Chen Haojing, Xu Jiajia.Optimizing production technique of forsterite lightweight spherical aggregates based on orthogonal design. Naihuo Cailiao (Refractories, in Chinese), 2022, 56(3): 226-230.
[10] Meng Qingxin, Zhou Ningsheng, Tang Mingyu, An Yalun.Synthesis of lightweight spherical forsterite aggregates and research on their application in MgO based castables. China's Refractories, 2018, 27(4): 41-45.
[11] Hu Limin, Li Nan.Preparation of high strength lightweight forsterite refractories by in-situ decomposition. Naihuo Cailiao (Refractories, in Chinese), 2005, 39(4): 283-285.

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Influence of Matrix Composition on Properties of Lightweight Magnesia-silica Castables

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