How to make road marking beads? The principle is actually quite simple. Here's an introduction for you.
Road marking beads are present in fly ash emitted from thermal power plants, an artificial volcanic ash materials. Thermal power plants grind coal into powder and spray it through specialized equipment into combustion boilers, keeping it flamed in a suspended state. Throughout the combustion process, combustibles, such as the organic components of coal and charcoal, are essentially burned out. While the non-combustible clayey components in coal, such as silica-aluminum-iron calcium, are melted at high temperatures and form a symbiote of Moreido and quartz glass, filled with various gases within their stomata. As the furnace temperature continues to rise to 1400 degrees Celsius, the particles in the molten state continue to roll in suspension to form spheres through a complex physical action. In this process, the gas in the hole is enclosed in the ball. The morphology of the road marking beads is basically generated.
When the furnace temperature continues to increase, with the principle of heat-expansion and cold-contraction, the gas inside will expand, the sphere will increase accordingly and the shell will become thin. Thus, a hollow, spherical object is formed. When the sphere rises and leaves the furnace, it will quickly become cold in air, a road marking bead coming into being. The raw materials used in road marking beads are mostly natural ores. Therefore, in order to make road marking beads, various ores must be crushed and added to the powder firstly. Then according to the glass composition, make the matching material, and send to the glass melting kiln for melting, finally form the glass liquid. Qualified glass liquor flows through the feed cell and out the feed port to form strands. For material strand temperature, the alkali road marking beads are generally 1150-1170℃, and the alkali-free glass is 1200-1220℃. The strand is sheared into a blastocyst by nearly 200 cuts per minute. The ball embryo passes through the chute and the ball separator, and is pivoted by the ball plate, rolling into different funnels. And then it falls into the ball-forming chute made up of three rollers with the same rotation direction. The embryo rotates on the roller with its surface tension, gradually forming smooth and round road marking beads.
The Use and Function of Glass Beads