Why using Fiberglass ?

Why using Fiberglass ?

1 Batch Raw Material All material used in the beginning dry solid, and the silica sand is the principal one. Because silica alone would not be suitable to the process, there is other material added to obtain the desired properties. Batch Plant Operations There are three main functions of batch plant: 1- Unloading raw material. 2- Weighing and mixing. 3- Distribution. First, the raw material is delivered by truck and they are emptied into silos in the batch house figure. The operator open and close the bins to allow each material to drop into a scale where the material is weighed. Then the batch is dropped into a mixer where it mixed before it is transferred to the furnace. After that, the batch is elevated to the furnace in batch can. Then the mixed batch is took from the silo above the furnace and feeds it into the melter. 2 Meleter Operation Furnace There are two sections: 1- Melting Area In this section the batch dropped and melt with around 1350-1400 °C. Batch is not actually melted but rather is dissolved into a solution melting point of silica, which is equal 173 1 °C, not reach in furnace. 2 Refining Area The temperature in this section around 1325 °C. No glass come to this section until it reach the desired melting point, if not that means it will be still in the previous section, this is the purpose of this section. The melter level control system will increase or decrease the speed of the screw feeders to control the melter level. The charges have the capacity to base the rate of feeding between each other. Forehearth The glass comes from the melter through channel, which does not contain the bushings. It goes to forehearth, which is the last section where the glass exits through the bushing. Bushing The bushing is at high temperature that controls the flow rate of glass as it leaves the forehearth. The molten glass comes out from the melter through a channel, then it goes to the fore hearth, this is the last section where the molten glass exits through an opening called "The Bushing". This varies depend on the density. If we want heavy density that means we need to increase pull rate. 3 Fiberizing After a hot molten glass is formed from the molten state, it can be quickly cooled into a solid state. This process is the fiberizing process. Those fiberizers are rotary fiberizers. It receives the molten glass stream from the bushing above, then converts it to solid glass wool of desired diameter The centrifugal force of the spinner drives the glass through tiny side holes of the spinner creating multiple glass steam primaries. These primaries are immediately being attenuated downward by high speed blower air, forming glass wool fiber. Upon exiting the fiberizer, the fiber is cooled by water spray. Then sprayed with binder before they are distributed onto the forming chain. The binder is responsible for keeping the fibers together. 4 Forming The forming process begins when the fiber leave the fiberizers. There are large fans pull the fiber down to the forming chain where they are sucked down to a very thin pack. Those fans for pulling fibers and binder to the forming chain to avoid bad distribution and back roll. Forming Section The Forming fans are used to collect the wool and binder down on the forming chain. Without this suction the fiber would fly all the around forehearth and bury the operation in wool. 5 Oven After the forming process, the green wool is delivered to one of the following line processes: 1. Main Line Process: The green?wool is transformed to the oven for curing and after that, it is cooled. Then, it goes to facing and packaging this line is used for producing building insulation plates. 2. Secondary Line Process (Rigid Pipe Section): In this section, the green wool is rolled around cylindrical mandrels and transferred to the oven for curing and then it goes for facing and packaging. This line is used for producing pipe insulations. 6 Facing & Adhesive The facing and adhesive used on any product needs to be looked at from a system point of view. What combination of material facing, and adhesive will meet the customers fitness for use. 7 Chopper & Packing After that it depends on the kind with the dimension, upon of this will be the setting of chopper. There are two general categories to determine how the product packaged. These are either material that can be compressed, and material that can not be compressed. Which is also depends on the kind of product.