Academician Zhong Xiangchong once looked forward to the future development direction of refractory materials in my country and pointed out that a series of distinctive high-quality synthetic materials should be researched and developed using my country's rich resources, including homogeneous materials, modified materials, and transformation materials.

With the increase in the demand for high-quality steel in my country, new requirements are constantly put forward in terms of the quality and quantity of molten steel. In order to adapt to this situation, inert gas is used for the forced stirring of molten steel to improve its productivity and cleanliness of molten steel. As the main equipment for the secondary refining of molten steel, the use conditions of the refractory lining of the ladle are becoming more and more severe. At present, aluminum-magnesium castables are generally used as refractory materials for ladles at home and abroad. However, for the ladle blowing parts that require extremely high thermal shock stability, the thermal shock stability of self-bonding aluminum-magnesium castables can be improved by adding Fused Alumina.

On large and medium-sized ladles, high-purity Al2O3-MgO castables and Al2O3-spinel castables are widely used, but Al2O3-MgO castables are prone to cracks, and slag penetrates into the castables along the cracks, accelerating erosion and reducing Extends the service life of the lining. Zhang Yanli et al. used the newly developed bauxite-based Zirconia Fused Alumina as a fine powder to study the effect of bauxite-based Zirconia Fused Alumina on the properties of Al2O3-MgO ladle castables and reached the following conclusions: (1) Bauxite-based fused zirconium corundum It can promote the sintering of Al2O3-MgO castables, thereby improving the physical properties of the castables at room temperature; (2) The introduction of bauxite-based fused zirconium corundum has little effect on the thermal shock resistance of Al2O3-MgO castables; (3) Consolidated soil base The introduction of Zirconia Fused Alumina has a slightly negative effect on the high-temperature flexural strength and slag corrosion resistance of Al2O3-MgO castables, which is mainly related to the formation of the liquid phase by impurities in bauxite-based Zirconia Fused Alumina at high temperature.