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
摘要 引入复合添加剂是改善低碳化MgO-C耐火材料性能的一个有效策略。由粘土经电磁感应加热和埋碳法制备了Al2O3-SiC复合粉。将在600 A下经电磁感应加热合成的Al2O3-SiC复合粉添加至低碳MgO-C耐火材料（4 wt.%）中以提高其性能。结果表明，当引入2.5~5.0 wt.%的Al2O3-SiC复合粉时，低碳MgO-C耐火材料的性能得以显著改善：其显气孔率为7.58%~8.04%，体积密度为2.98~2.99 g cm−3，常温耐压强度为55.72~57.93 MPa，在1100 °C 热震3次空冷循环后的残余强度为74.86%~78.04%，1400 °C 氧化2 h后的脱碳层厚度为14.03~14.87 mm。因此，快速合成Al2O3-SiC复合粉的思路为低碳MgO-C耐火材料性能优化提供了一个选择策略。
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.
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.
2022, Vol. 29 
