How are glass beads made

Update time:04-09-2020

Glass microbeads Glass ball exist in the fly ash discha […]

Glass microbeads Glass ball exist in the fly ash discharged from thermal power plants. They are an artificial volcanic ash material. Thermal power plants pulverize coal into powder and spray them into the combustion boiler through experienced equipment to let them burn in a suspended state. During the entire combustion process, the agricultural production system components in coal and combustibles such as char are basically burned out, while the clayey silicon, aluminum, iron, calcium and other incombustible components in the coal are melted at high temperatures.


(2mm-13mm)3.175mm high precision glass ball


The symbiotic body of Moledo and quartz glass is filled with various gases in their pores. When the furnace temperature continues to rise to 1400 degrees Celsius, through complex physical effects, molten particles continue to roll in suspension to form In this process, the gas in the hole is surrounded by 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, and the sphere follows When the sphere is enlarged and the side of the supporting shell is thin, such a hollow spherical object is formed.


When the sphere rises and leaves the furnace, it encounters air and quickly cools down, and glass beads are formed. The raw materials for glass spheres are mostly natural ores. Therefore, to manufacture glass balls, firstly, various ores are crushed and added into powder, and then according to the composition of the glass, a batch is made, which is sent to the glass melting furnace for melting to form a glass liquid. Qualified glass liquid flows through the feeding tank , And flow out from the feeding port to form strands.


The temperature of the strands is generally 1150~1170°C for medium-alkali glass balls and 1200~1220°C for alkali-free glass. The strands are cut into spherical embryos by nearly 200 times per minute. The ball embryo passes through the chute, the ball divider, and is moved by the ball dividing plate, rolls into different funnels, and then falls into the ball groove formed by three rollers with the same rotation direction. The ball embryo is on the roller. The rotation and its own surface tension function gradually form a smooth and round glass ball.