Effect of Submicron SiO2 Powder Addition on Properties of Cement Free Iron Trough Castables

doi:10.19691/j.cnki.1004-4493.2022.03.003

China's Refractories ›› 2022, Vol. 31 ›› Issue (3): 9-13.DOI: 10.19691/j.cnki.1004-4493.2022.03.003

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Effect of Submicron SiO₂ Powder Addition on Properties of Cement Free Iron Trough Castables

CHENG Shuiming^1,2, CHEN Jinfeng¹, WEI Jianxiu¹, CAI Wei¹, ZHAO Huizhong^2,*

1 Wuhan Research Institute of Metallurgy Construction Co., Ltd. of MCC Group, Wuhan 430081, China;
2 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China Key words：iron trough castable; cement free; submicron SiO2 powder; microstructure

Online:2022-07-15 Published:2022-11-07
Contact: ^*e-mail: wustnano@163.com
About author:Cheng Shuiming, born in 1972, a senior engineer, is now studying in Wuhan University of Science and Technology for his Ph. D. He has been working in Wuhan Research Institute of Metallurgy Construction Co., Ltd of MCC Group since 1996. He mainly engaged in the development of new environmentally friendly refractory materials.

Abstract

Abstract: A new cement free iron trough castable was prepared with dense corundum and silicon carbide as the main raw materials and submicron SiO2 powder (d50=0.242 μm, SiO2=99.9 mass%) as the binder. The effect of the submicron SiO2 powder addition (3%, 4%, 5%, 6%, 7%, 8%, and 9%, by mass, respectively) on the properties of the prepared castables was studied. The working mechanism of submicron SiO2 powder was analyzed from the perspective of the particle size distribution and infrared absorption spectrum. The results show that: (1) cement free iron trough castables can be prepared using submicron SiO2 powder alone as the binder; (2) compared with traditional castables, the cement free castables have made a breakthrough in the water addition and hot modulus of rupture. The optimal submicron SiO2 powder addition is 4%-6%.

Key words: iron trough castable, cement free, submicron SiO2 powder, microstructure

CHENG Shuiming, CHEN Jinfeng, WEI Jianxiu, CAI Wei, ZHAO Huizhong. Effect of Submicron SiO₂ Powder Addition on Properties of Cement Free Iron Trough Castables[J]. China's Refractories, 2022, 31(3): 9-13.

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Effect of Submicron SiO₂ Powder Addition on Properties of Cement Free Iron Trough Castables

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