The mechanical strength of the products is high, which is several times that of ordinary lightweight products, and the bulk density is only one-half of corundum products. There are two types of alumina hollow spheres: mixed grade balls and graded balls: the particle size of mixed grade balls is 0.2-5mm, and the particle sizes of graded balls are 0.2-1mm, 1-2mm, 2-3mm, 3-5mm. It has been widely used in high-temperature and ultra-high-temperature furnaces such as industrial gasifiers.

Alumina hollow ball ---production process

The binders for alumina hollow ball refractory castables mainly include alumina cement, bonded clay, aluminum phosphate, aluminum sulfate, etc. The refractory powder is made of industrial alumina powder or corundum powder, and its fineness is less than 0.09mm The maximum particle size of the hollow sphere is 5mm, and the natural gradation or graded gradation is adopted. Additionally, admixtures or admixtures should be incorporated to enhance performance.

Alumina hollow ball castable --- Instructions for use

Alumina hollow ball castable high-temperature refractory concrete lightweight aggregates, high-temperature castables, etc. Hollow ball bricks can be used for high-temperature energy saving (>30%) down the flame kiln, shuttle kiln, molybdenum wire furnace, tungsten rod furnace, induction furnace, nitriding furnace, etc. By reducing the weight of the furnace body, transforming the structure, saving materials, and saving energy, obvious effects will be achieved.