How to deal with glass fiber waste?

waste silk

Waste paper tubes, wires, nuts and other debris, open wires, metal detectors.

Scrap

At the entrance of the crusher, a pair of rollers must be installed to control the amount of feed. The product is 5mm short fiber and powder with finer particle size: secondary crushing after drying, plus air selection device.

Waste line cleaning

After rinsing with water, the sizing agent attached to the fiber will be washed away, and the water of the waste silk will be washed, and the water treated by the sewage treatment station can be used, almost no tap water is needed. The washed water is returned to the sewage treatment station for treatment. The rinsed fibers are first separated from the water by a sand water separator.

waste silk drying

It is sent to the dryer by the winch for continuous drying. The elevator has the function of frequency conversion speed regulation, and the feeding speed will affect the moisture content of the dried product. The energy source of the dryer is natural gas, which is steam dried and then dried by a kiln. The fiber content after drying is less than 1%. According to production needs, it can be put into storage tanks or big bags for standby, or it can be pneumatically transported to the use box.

Utilization of waste silk

1. Application in continuous fiber production

Please note the following points:

1 The kiln head is equipped with double-sided feeding, and the feeding amount on both sides is as equal as possible.

2. It should be as dry as possible, and the optimum moisture content should not exceed 1%, which is also the case for alkali-free kilns.

3 The size of non-alkali waste silk can be thinner, while the medium alkali silk is the opposite, it should be as thick as possible.

4 Add volatile components B and F to the chemical composition of glass fiber.

2. Application in glass wool production

1 Since the components of medium-alkali glass fiber and medium-alkali glass wool are the same in 5, medium-alkali waste silk can be directly used to produce alkali metal-alkali glass wool.

2 The composition of alkali-free glass fiber is compared with that of alkali-free glass wool:

comparison description

From the comparison, it can be seen that except for the difference between CaO and MgO, there are only minor differences in other components such as Si, Al, B and R2O. In production, the raw materials introduced into the original formula of CaO and MgO are mainly supplemented, and the remaining ingredients can be slightly adjusted to meet production needs.

3. Application in patterned glass production

The production of patterned glass using waste silk has been described. The main method is to arrange the composition similar to patterned glass according to the composition characteristics of medium and non-alkali waste silk according to the 2:1 ratio of medium and non-alkali waste silk. The following table:

By using quartz sand and soda ash, the components such as low SiO2, R2O and high CaO, MgO, Al2O3 are corrected to form a composition formula that meets production needs. The approximate formula is as follows:

During production, care should be taken to properly control the annealing temperature (about 570°C) and molding temperature.

4. Application in glass mosaic production

The production of glass mosaics using medium-sized and non-alkaline waste silk has been used for many years. Due to the different colors of glass mosaics, there are also certain differences in composition. According to the composition requirements of different colors, choose to use moderate or non-alkaline waste silk. However, in order to meet the requirements of product color and thermal stability, chemical stability, mechanical strength, etc., it is necessary to further adjust the composition, and properly add minerals such as silica sand, limestone, feldspar potassium, albite, and nahcolite. Ash, fluorite, etc. Raw materials and different colorants.

5. Use ceramic fiber waste silk to produce ceramic glaze

The basic components of glass fiber are all the components required for ceramic glaze, especially the 7% B2O3 in the alkali-free fiber. It is a common ingredient in glazes, which can lower the melting temperature of glazes, prevent glazes from cracking and improve glazes. Surface hardness, gloss and chemical resistance. Due to the relatively high price of boron raw materials, the proportion of glaze cost is very high. Making full use of the useful components of waste silk can greatly reduce the production cost of glazes.


Post time: Jan-31-2023

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