Breathable brick is the bottom of the converter furnace and furnace refining blowing argon important equipment, its role is conducive to the homogenization of steel and alloy dissolution, accelerate the non-metallic inclusions floating and harmful gases removed, improve the quality of steel and the rate of material, reduce the scrap rate. At present, the domestic commonly used for chrome corundum permeable brick.

According to the development direction of refractory materials, utilizing the microcracking toughening mechanism, adopting different composite corundum materials with excellent high temperature mechanical properties, slag erosion resistance and thermal shock; spinel materials, and developing environmentally friendly corundum-spinel breathable bricks on the basis of chrome corundum breathable bricks. The use of composite corundum effectively improves the shortcomings of poor thermal shock stability of single corundum, and at the same time adopts special processing means, the product has higher density, better scouring resistance and erosion resistance, and has been used by dozens of domestic steel mills, with a life span exceeding that of domestic products of the same kind and approaching the international advanced level.