How to produce glass beads
1. How to produce glass beads
Glass beads exist in the fly ash discharged from thermal power plants. It is an artificial volcanic ash material. Thermal power plants pulverize coal into powder and spray them into the combustion boiler through experienced equipment to burn them in a suspended state. . During the entire combustion process, the agricultural production system components in coal and combustibles such as charcoal are basically burned out, while the clayy silicon, aluminum, iron, calcium and other non-combustible components in coal are melted at high temperatures to form a The symbiotic body of Laiduo and quartz glass is filled with various gases in their pores. When the furnace temperature continues to rise to 1400oC, through complex physical effects, the molten particles continue to roll in suspension to form spheres. . In this process, the gas in the hole is enclosed inside, 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 sphere expands, the sphere enlarges accordingly, and the side of the supporting shell becomes 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.
2. What are the special properties of glass beads
1） Light weight and large volume. The density of hollow glass beads is about one tenth of the density of traditional filler particles. After filling, it can greatly reduce the basis weight of the product, replace and save more production resins, and reduce product costs.
2） It has a modified (lipophilic) surface for agricultural production systems. Hollow glass beads are easy to wet and disperse, and can be filled in most thermosetting thermoplastic resins, such as polyester, epoxy resin, polyurethane, etc.
3） High dispersion and good liquidity. Because hollow glass beads are tiny spheres, they have better fluidity in liquid resin than flake, needle or irregular shape fillers, so they have excellent mold filling performance. What's more important is that the small microbeads are isotropic, so they won't have the disadvantage of inconsistent shrinkage of different parts due to orientation, and ensure the dimensional stability of the product without warping.
4） Heat insulation, sound insulation, insulation, low water absorption rate. The inside of the hollow glass beads is a thin gas, so it has the characteristics of sound insulation and heat insulation, and is a good filler for various heat insulation and sound insulation products. The thermal insulation properties of hollow glass microspheres can also be used to protect products from thermal shocks caused by alternate changes between rapid heating and rapid cooling conditions. High specific resistance and low water absorption make it widely used in the processing and production of cable insulation materials.
5） Low oil absorption. The particles of the sphere determine that it has a smaller specific surface area and low oil absorption. During use, the amount of resin can be greatly reduced. Even under the premise of high addition, the viscosity will not increase much, which greatly improves the production and operating conditions. Can increase production efficiency by 10%-20%.
