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| Influence of pre-synthesized Al2O3–SiC composite powder from clay on properties of low-carbon MgO–C refractories |
| Bei-yue Ma1,2, Xin-ming Ren1,2, Zhi Gao1,2, Fan Qian3, Zhao-yang Liu2, Guo-qi Liu3, Jing-kun Yu2, Gao-feng Fu1,2 |
1 Key Laboratory for Ecological Metallurgy of Multimetallic Mineral (Ministry of Education), Shenyang 110819, Liaoning, China
2 School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China
3 State Key Laboratory of Advance Refractories, Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, Henan, China |
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Abstract To improve the properties of low-carbonization of MgO–C refractories, the introduction of composite additives is an effective strategy. Al2O3–SiC composite powder was prepared from clay using electromagnetic induction heating and carbon embedded methods. Further, the Al2O3–SiC composite powder synthesized by electromagnetic induction heating at 600 A was added into low-carbon MgO–C refractories (4 wt.%) to improve their properties. The results showed that when the addition amount of Al2O3–SiC composite powder is within the range of 2.5–5.0 wt.%, the properties of low-carbon MgO–C samples were significantly improved, e.g., the apparent porosity of 7.58%–8.04%, the bulk density of 2.98–2.99 g cm-3 , the cold compressive strength of 55.72–57.93 MPa, the residual strength after three air quenching at 1100 °C of 74.86%–78.04%, and the decarburized layer depth after oxidized at 1400 °C for 2 h of 14.03–14.87 mm. Consequently, the idea for the rapid synthesis of Al2O3–SiC composite powder provides an alternative low-carbon MgO–C refractories performance optimization strategy.
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Received: 27 April 2021
Published: 25 July 2022
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Bei-yue Ma,Xin-ming Ren,Zhi Gao, et al. Influence of pre-synthesized Al2O3–SiC composite powder from clay on properties of low-carbon MgO–C refractories[J]. Journal of Iron and Steel Research International, 2022, 29(7): 1080-1088.
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2022, Vol. 29 
