Glass microbeads exist in the fly ash discharged from thermal power plants. They are a kind of artificial volcanic ash material. Thermal power plants pulverize coal into powder and spray them into the combustion boiler through equipment to burn them in a suspended state. During the entire combustion process, the organic components in coal and combustibles such as charcoal are basically burned out, while the clayy silicon, aluminum, iron, calcium and other incombustible components in coal are melted at high temperatures. A symbiotic body of Moledo and quartz glass is formed, and their pores are filled with various gases.

When the furnace temperature continues to rise to 1400 degrees Celsius, through complex physical effects, molten particles continue to roll in suspension to form spheres. In this process, the gas in the hole is enclosed in the ball, and the shape of the glass beads is basically formed.

When the furnace temperature continues to increase, due to the principle of thermal expansion and contraction, the gas in the ball expands, the sphere increases accordingly, and the side of the supporting shell is thin. Such a hollow spherical object is formed. When the sphere rises and leaves the furnace, When encountering air, the temperature drops quickly, and glass beads are formed.