Alumina hollow spheres are made of industrial alumina by melting and blowing in an electric furnace, and the crystal form is a-Al2O3 microcrystals. With alumina hollow spheres as the main body, it can be made into various specifications of refractory and lightweight products, the maximum operating temperature is 1800 ° C, the mechanical strength is high, the thermal conductivity is low, and the performance is stable in various atmospheres.
Advantages of Alumina Hollow Spheres
1. High operating temperature: up to 1750 degrees or more, with good thermal stability. The reburning line has a small change rate and can be used for a longer time.
2. Optimize the structure and reduce the weight of the furnace body: the high temperature resistant materials are all heavy bricks with a bulk density of 2.6-3.0g/cm, while the alumina hollow ball brick is only 1.1-1.5g/cm, the same volume of one cubic meter, the use of oxidation Aluminum hollow ball bricks can reduce the weight of 1.1-1.9 tons.
3. Material saving: At the same operating temperature, the use of alumina hollow ball bricks can save 1.1-1.9 tons of heavy bricks per cubic meter compared with heavy bricks, and can save 80% of refractory insulation materials.
4. Energy saving: Alumina hollow spheres have obvious thermal insulation properties, low thermal conductivity, reduce heat dissipation, can play a good thermal insulation effect, improve thermal efficiency, and achieve the purpose of saving energy, and the energy saving effect can reach more than 30%.
The Use of Alumina Hollow Spheres
1. Alumina hollow spheres and their products are lightweight refractory materials with high temperature resistance and excellent energy saving.
2. Alumina hollow spheres are ideal insulation filling materials for high temperature furnaces, heat insulation and energy saving refractory materials. It can be used as high temperature, ultra-high temperature insulation filler, high temperature refractory concrete lightweight aggregate, high temperature castable, etc.
3. Alumina hollow balls are widely used in high temperature and ultra-high temperature furnaces such as petrochemical industrial gasifiers, carbon black industrial reaction furnaces, and metallurgical industrial induction furnaces.
4. Alumina hollow ball refractory bricks can be used for high temperature energy saving (>30%) industrial furnaces.
