Corundum spinel castable has been widely used as the refractory of ladle working lining, but its material still has the following problems in the process of use
1. Although the volume expansion accompanying the formation of in-situ spinel can make the material compact and improve the permeability resistance, there are also cracks and spalling of the material due to expansion
2. A higher degree of densification will reduce the thermal shock resistance of the material and easy to peel off
3. The reaction of slag Yucai Road is inevitable, and the damage to materials is very serious. In view of the above problems, the improvement methods are:
1) , adding sintered spinel fine powder to improve the high-temperature flexural strength and thermal shock resistance of the material, adding 5% of the particle size of 0.038mm, the high-temperature flexural strength and thermal shock resistance of the material, the effect is good
2) According to the composition of slag, improving the slag corrosion resistance of corundum spinel, reducing the reaction degree with slag, reducing the permeability of slag, and improving the high temperature performance of materials are good ways to improve the use effect of corundum spinel castables
