Aluminum oxide hollow sphere brick is a new type of high-temperature insulation material, which is made by melting and blowing industrial aluminum oxide in an electric furnace. With aluminum oxide hollow spheres as the main body, it can be made into various shapes of products, with a maximum operating temperature of 1800 ℃. The mechanical strength of the products is high, several times that of general lightweight products, and the bulk density is only half of that of corundum products. Alumina hollow sphere bricks are widely used in high-temperature and ultra-high temperature kilns such as gasification furnaces in the petrochemical industry, carbon black industrial reaction furnaces, and induction furnaces in the metallurgical industry, and have achieved very good energy-saving effects.
Advantages of alumina hollow sphere bricks: significant results can be achieved in reducing the weight of the furnace body, renovating the structure, saving materials, and energy.
1. High operating temperature:
It can reach temperatures above 1750 degrees and has good thermal stability. The rate of change of the re burning line is small, and it can be used for a longer period of time.
2. Optimize the structure and reduce the weight of the furnace body:
Nowadays, the use of high-temperature resistant materials belongs to heavy bricks with a volume density of 2.6-3.0g/cm, while alumina hollow ball bricks have a volume density of only 1.1-1.5g/cm. For the same cubic meter volume, using alumina hollow ball bricks can reduce the weight by 1.1-1.9 tons.
3. Save materials:
To achieve the same operating temperature, the price of using heavy bricks is comparable to that of alumina hollow sphere bricks, and a considerable amount of insulation refractory materials are also required. If alumina hollow sphere bricks are used, 1.1-1.9 tons of heavy bricks can be saved per cubic meter, and 80% of refractory insulation materials can be saved.
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