Tang Hu, Jia Zhenggang, Li Bing, Chen Huazhong, Yuan Wenjie
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China.
Hubei Annaijie Lining Materials Co., Ltd., Xiangyang 441100, China.
Materials (Basel). 2023 Feb 17;16(4):1707. doi: 10.3390/ma16041707.
To achieve the goal of "dual-carbon", induction furnaces with high efficiency and energy-saving advantages are paid more attention in the foundry and metallurgy industries. The service life and safety of induction furnaces strongly depended on the lining because expansion and forward sintering could result in the erosion and slag resistance of the lining. Focusing on the tailoring properties of alumina-magnesia-based dry ramming mixes, calcined magnesia particles were replaced with the novel multi-component materials of calcium magnesium aluminate (CaO-MgO-AlO, CMA) with a size of 200 mesh. Properties such as the bulk density, apparent porosity, strength, and slag corrosion resistance of alumina-magnesia-based dry ramming mix containing CMA were evaluated contrastively. The results demonstrate that the penetration index of manganese-bearing slag in dry ramming mixes first decreased and then slightly increased with the addition of CMA. Meanwhile, the permanent linear change in dry ramming mixes was gradually reduced. When the addition of CMA reached 4 wt%, the strength of the dry ramming mixes was slightly greater than the reference, and the slag penetration index was just 75% of the latter.
为实现“双碳”目标，具有高效节能优势的感应炉在铸造和冶金行业中受到更多关注。感应炉的使用寿命和安全性很大程度上取决于炉衬，因为膨胀和前期烧结会导致炉衬的侵蚀和抗渣性。针对铝镁质干式捣打料的定制性能，用尺寸为200目的新型多组分材料铝酸钙镁（CaO-MgO-AlO，CMA）替代了煅烧镁颗粒。对比评估了含CMA的铝镁质干式捣打料的体积密度、显气孔率、强度和抗渣腐蚀性等性能。结果表明，干式捣打料中含锰炉渣的渗透指数随CMA加入量先降低后略有升高。同时，干式捣打料的永久线变化逐渐减小。当CMA加入量达到4 wt%时，干式捣打料的强度略高于参考样，炉渣渗透指数仅为后者的75%。
