Alumina hollow ball brick is a new type of high-temperature heat insulation material. It is produced by smelting and blowing industrial alumina in an electric furnace. With alumina hollow balls as the main body, it can be made into products of various shapes. The maximum working temperature is 1800℃, the mechanical strength of the product is high, which is several times that of general light products, and the bulk density is only half of that of corundum products. Alumina hollow ball bricks are widely used in high-temperature and ultra-high-temperature furnaces such as petrochemical industrial gasifiers, industrial carbon reaction furnaces, and metallurgical industrial induction furnaces, and have achieved very good energy-saving effects.
Advantages of alumina hollow ball bricks: Obvious results will be achieved in reducing the weight of the furnace body, transforming the structure, saving materials and saving energy.
1. High operating temperature:
Temperature can be above 1750 degrees, good thermal stability. Small linear change on reheating. Longer service life.
2. Optimize the structure and reduce the weight of the furnace body:
At present, the high-temperature refractory materials are all heavy bricks with volume density of 2.6-3.0g/cm, while density of alumina hollow ball bricks are only 1.1~1.5g/cm, the same volume of one cubic meter, using alumina hollow ball bricks can reduce 1.1- 1.9 tons weight.