How are high-quality alumina hollow spheres formed?

The formation of alumina hollow spheres is completed in a short period of time (10-30s) by blowing alumina melt under high-pressure air. The ball forming process is actually a rapid cooling and shrinking process. The melting point of alumina is 2050°C, and the temperature suitable for blowing the ball should be 200~300°C higher than the melting point, that is, it needs to be heated to 2200~2300°C.

Preparation method and preparation mechanism of alumina hollow spheres

The aluminum oxide hollow sphere material has a cavity structure inside, and the thickness of the shell layer is at the nanometer or micronano level.

Alumina hollow sphere

Alumina hollow spheres are hollow spherical lightweight heat-insulating refractory materials that are blown out after melting alumina at high temperature in an electric arc furnace. It is characterized by light weight, closed cells and high temperature resistance.

How to use alumina hollow ball as refractory castable

There are indeed many types of admixtures in refractory castables. The amount of admixtures varies with the performance and function of the admixture. It is a few ten-thousandths to a few percent of the total amount of amorphous refractory components, generally Add it when mixing the components of the amorphous refractory or before mixing.

Parameters Determining the Properties of Polyhedral Alumina Hollow Sphere

With the continuous improvement of people's water treatment standards, especially in some northern cities, it is widely used in water treatment.