How can waste fiberglass be recycled?
During the production process of fiberglass reinforced materials, fiberglass filaments (accounting for about 10% to 15% of the total output) will be produced. These waste filaments have always been disposed of by deep burial in the land, but this method causes serious pollution to the land.
With the development of technology, fiberglass filaments can be reused in the following ways, turning waste into treasure.
01. The waste wire is returned to the furnace and re-melted to make a new batch of fiberglass.
After a series of processes such as picking up, crushing, washing, and drying, the fiberglass waste is remanufactured to produce new fiberglass materials.
02. Production of glass wool
Because the composition of fiberglass is very similar to that of medium-alkali glass wool, medium-alkali glass waste can be directly used to produce medium-alkali glass wool.
The composition of alkali-free fiberglass is basically the same as that of alkali-free glass wool, with only the two components CaO and MgO being different.
In terms of production, the original formula can be supplemented by introducing CaO and MgO, and minor adjustments to the remaining ingredients can meet the needs of producing alkali-free glass wool.
03. Production of patterned glass
The main method of using waste wire to produce embossed glass is to configure a formula similar to that of embossed glass based on the composition characteristics of medium-alkali or alkali-free waste wire and the amount of medium-alkali or alkali-free waste wire 2:1.
Then use the method of supplementing quartz sand and soda ash to correct the low SiO2 (silica), R2O and high CaO, MgO, Al2O3 (alumina) and other components to form a component formula that meets production needs.
In production, attention should be paid to proper control of the annealing temperature (about 570°C) and molding temperature to ensure the production of high-quality patterned glass.
04. Production of glass mosaics
There are certain differences in the composition of glass mosaics of different colors. According to the composition requirements of different colors, you can choose to use medium-alkali or alkali-free waste silk.
However, in order to meet the requirements of product color, thermal stability, chemical stability, mechanical strength, etc., the ingredients need to be further adjusted, and minerals such as silica sand, limestone, potassium feldspar, albite, soda ash, fluorite, etc. need to be appropriately added. Raw materials and different colorants.
05. Production of ceramic glazes
The basic components of glass fiber are all required for ceramic glazes. In particular, the alkali-free fiber contains 7% B2O3 (boron oxide), which is a commonly used component for glazes. It can lower the melting temperature of the glaze and prevent the glaze from forming. Cracking and improving glaze hardness, gloss and resistance to chemical corrosion.
Since the price of boron raw materials is relatively high, it accounts for a high proportion of the glaze cost. Making full use of the useful components of waste silk can greatly reduce the production cost of glaze.
