CN107459260A - It is a kind of using flyash as glass fibre of primary raw material and preparation method thereof - Google Patents

Abstract

The invention relates to a glass fiber with fly ash as the main raw material and a preparation method thereof. The glass fiber with fly ash as the main raw material of the present invention includes the following raw material components in mass percentage: fly ash 25-75% , quartz sand 5-30%, calcite 5-25%, dolomite 0-5%, other ingredients 5-20%. The present invention mixes and grinds the raw material components in the mass ratio, adds additives to obtain a mixture, melts it to obtain glass liquid, and obtains fly ash glass after water quenching. After cleaning, selecting and decontaminating, wire drawing, Dry to obtain the final product glass fiber. The glass fiber prepared by the invention has high strength, corrosion resistance and high temperature resistance, realizes energy saving and environmental protection of the whole industrial chain, has very large economic benefits, environmental benefits and social benefits, and also has very good development prospects.

Description

A kind of glass fiber with fly ash as main raw material and preparation method thereof

technical field

The invention belongs to the technical field of glass fiber materials, in particular to a glass fiber with fly ash as the main raw material and a preparation method thereof.

Background technique

Fly ash is the powdery residue that is carried out from the boiler by the flue gas after the combustion of pulverized coal. In recent years, my country's industry has developed rapidly, and the scale of coal-fired power generation units has increased. At the same time, there are problems such as low coal grade and high coal consumption per unit of power generation. There were serious adverse effects. At present, the comprehensive management of fly ash has expanded from the past application of roadbed, filling, concrete admixture, etc. to advanced utilization of environmental protection materials, foam glass, cement raw materials, and large-volume concrete products.

Zhao Tongxi and others applied for fly ash dry-mixed mortar in December 2010 (application number: 201010608676.0). Jiang Guoping (Yixing Hongwei Technology Co., Ltd.) applied for the invention patent of fly ash composite grinding aid in October 2012 (application number: 201210420974.6). Xu Qinghua and others applied for the invention patent of fly ash flame retardant foaming agent in May 2013 (application number: 201310198238.5). The invention discloses a fly ash flame retardant foaming agent, which is suitable for producing flame retardant and fire extinguishing products, light boards, light walls and noise reduction products. In October of the same year, they also applied for a patent for the invention of fly ash environmental sound-absorbing panels (application number: 201310475274.1). Liu Lin applied for a patent for the invention of a fly ash hollow brick in October 2014 (application number: 201410551770.5). Hu Chengshuo and others applied for a patent for a fly ash cement invention in August 2016.

At present, there are also some patents on glass wool and glass fiber. Zhang Zhenying applied for the microfiber glass wool kiln control and production process in June 2013 (application number: 201310467061.4). Luan Xiao applied for the production process of microfiber glass wool in October 2013 (application number: 201310467061.4). These are improvements from glass wool and glass fiber technology, but do not involve fly ash.

Contents of the invention

The technical problem to be solved by the present invention is to provide a kind of glass fiber with fly ash as the main raw material and its preparation method. and other raw materials to prepare glass fibers and realize the energy saving and environmental protection of the entire industrial chain, which has very good development prospects.

A glass fiber with fly ash as the main raw material of the present invention comprises the following raw material components in mass percentage: 25-75% of fly ash, 5-30% of quartz sand, 5-25% of calcite, 0-25% of dolomite 5%, other ingredients 5-20%. Wherein the component content of fly ash is preferably 45-75%.

The fly ash is fly ash for a power plant, wherein the power plant is selected from one or more of a pulverized coal power plant, a coal slime power plant or a biomass power plant.

The other ingredients are cullet or industrial slag.

The drawing diameter of the glass fiber is 10-20 μm.

The preparation method of the glass fiber taking fly ash as the main raw material of the present invention comprises:

(1) Evenly mix and grind fly ash, quartz sand, calcite, dolomite and other components, and then add additives to obtain a mixture, wherein other components are broken glass or industrial slag;

(2) melting the mixture obtained in step (1) to obtain molten glass, and obtaining fly ash glass after water quenching;

(3) Put the fly ash glass obtained in the step (2) into a platinum-rhodium alloy crucible after being cleaned, selected and decontaminated, draw wire, and then dry to obtain the final product glass fiber.

The additive in the step (1) is a glass clarifier, which is Glauber's salt or CeO ₂ , but not limited to these two glass clarifiers. Wherein the consumption of Glauber's salt is 0.1-0.3% of the total amount of the mixture, and the consumption of CeO2 is 0.1-0.4 _% of the total amount of the mixture.

The technological parameters of the melting in the step (2) are: the melting temperature is 1350-1450° C., and the melting time is 3-4 hours.

The technical parameters of the wire drawing in the step (3) are as follows: first, the temperature is raised to 1300-1400° C., kept for 1.5-2.5 hours, and the wire drawing is carried out at 1200-1280° C. according to the viscosity of the glass liquid.

The technical parameters of the drying in the step (3) are as follows: the drying temperature is 85-110° C., and the drying time is 6-12 hours.

The sizing agent is applied during the drawing process in the step (3).

Beneficial effect

(1) The glass fiber with fly ash as the main raw material of the present invention is compared with conventional glass wool and glass fiber in various properties, and it is found that it has high strength, corrosion resistance, high temperature resistance and other properties.

(2) The glass fiber with fly ash as the main raw material of the present invention utilizes the high acid-resistant alumina and calcium oxide contained in the fly ash, combined with raw materials such as quartz sand, to realize energy saving and environmental protection of the entire industrial chain, and has a very Great economic benefits, environmental benefits and social benefits, but also has a very good development prospects.

Description of drawings

Fig. 1 is the SEM image of the 45% fly ash glass fiber prepared in Example 2.

Fig. 2 is a graph showing the tensile strength of glass fibers with different fly ash contents prepared in Examples 1-4.

Fig. 3 is an XRD pattern of glass fibers with different fly ash contents prepared in Examples 1-2.

detailed description

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Example 1

The mass fraction of fly ash components in a thermal power plant is shown in Table 1.

Table 1 Fly ash composition list

components SiO ₂ Al ₂ O ₃ SO ₃ MgO CaO TiO ₂ Na ₂ O _{Fe2O3 _} K ₂ O content 45.34 27.95 2.85 1.27 11.48 1.51 0.76 6.99 1.46

(1) Weigh the following raw material components in mass percentage: 25% of fly ash, 45% of quartz sand, 10% of calcite, 5% of dolomite, 15% of cullet, and prepare batch materials, grind and mix, add Consumption is the 0.1% CeO of mixture ₂ Glass clarifying agent, obtain mixture;

(2) Add the mixture into the crucible and place it in a melting furnace; melt it at 1400°C for 3 hours to obtain a defect-free molten glass, and obtain fly ash glass after water quenching;

(3) After cleaning, selecting and decontaminating the above-mentioned fly ash glass, add it into a platinum-rhodium alloy crucible, heat it up to 1350°C and keep it warm for 2 hours, then draw it at 1200°C according to the viscosity of the glass liquid, and then draw During the process, the sizing agent is coated, and the drawn glass fibers are dried at 85°C for 12 hours to obtain glass fibers, which are numbered and packaged for storage.

The tensile strength performance of the glass fiber obtained in this embodiment was tested, and the result is shown in FIG. 2 , the tensile strength reached 3.16GPa. The softening point temperature of the glass fiber obtained in this example is as high as 890° C., and the mass retention rate reaches 91.3% after soaking with 3 mol/L hydrochloric acid for 24 hours. The structure of the glass fiber obtained in this embodiment was characterized by X-ray diffractometer (XRD), and the result showed that it was an amorphous glass structure, as shown in FIG. 3 .

Example 2

Adopt the same certain thermal power plant fly ash among the embodiment 1.

(1) Weigh the raw material components in the following mass percentages: 45% fly ash, 30% quartz sand, 12% calcite, 3% dolomite, 10% cullet, and make batches, grind, mix, add Consumption is the 0.2% CeO of mixture ₂ glass clarifying agent, obtains mixture;

(2) Add the mixture to the crucible and place it in a melting furnace; melt it at 1420°C for 4 hours to obtain a defect-free molten glass, and obtain fly ash glass after water quenching;

(3) After cleaning, selecting and decontaminating the above-mentioned fly ash glass, put it into a platinum-rhodium alloy crucible, heat it up to 1350°C and keep it warm for 2 hours, then draw it at 1240°C according to the viscosity of the glass liquid, and then draw it in the drawing During the process, the sizing agent is coated, and the drawn glass fibers are dried at 100°C for 9 hours to obtain glass fibers, which are numbered and packaged for storage.

The morphology of the glass fiber obtained in this example was characterized by scanning electron microscopy (SEM), and the results are shown in FIG. 1 . The tensile strength performance of the glass fiber obtained in this embodiment was tested, and the result is shown in FIG. 2 , the tensile strength reached 3.25 GPa. The softening point temperature of the glass fiber obtained in this example is as high as 910° C., and the mass retention rate reaches 97.5% after soaking with 3 mol/L hydrochloric acid for 24 hours. The structure of the glass fiber obtained in this embodiment was characterized by X-ray diffractometer (XRD), and the result showed that it was an amorphous glass structure, as shown in FIG. 3 .

Example 3

Adopt the same certain thermal power plant fly ash among the embodiment 1.

(1) Weigh the following raw material components in mass percentage: 55% of fly ash, 20% of quartz sand, 10% of calcite, 3% of dolomite, 12% of cullet, and prepare batch materials, grind and mix, add Consumption is the Glauber's salt glass clarifying agent of 0.2% of the mixture to obtain the mixture;

(2) Add the mixture into the crucible and place it in a melting furnace; melt it at 1380°C for 3 hours to obtain a defect-free molten glass, and obtain fly ash glass after water quenching;

(3) After cleaning, selecting and decontaminating the above-mentioned fly ash glass, add it into a platinum-rhodium alloy crucible, heat it up to 1350°C and keep it warm for 2 hours, then draw it at 1260°C according to the viscosity of the glass liquid, and then draw During the process, the sizing agent is coated, and the drawn glass fibers are dried at 85°C for 12 hours to obtain glass fibers, which are numbered and packaged for storage.

The tensile strength performance of the glass fiber obtained in this embodiment was tested, and as shown in FIG. 2 , the tensile strength reached 3.36GPa. The softening point temperature of the glass fiber obtained in this example is as high as 925° C., and the mass retention rate reaches 98.2% after soaking with 3 mol/L hydrochloric acid for 24 hours.

Example 4

Adopt the same certain thermal power plant fly ash among the embodiment 1.

(1) Weigh the following raw material components in mass percentage: 75% of fly ash, 5% of quartz sand, 10% of calcite, 3% of dolomite, 7% of cullet, and prepare batch materials, grind and mix, add Consumption is the Glauber's salt glass clarifying agent of 0.3% of the mixture to obtain the mixture;

(2) Add the mixture into the crucible and place it in a melting furnace; melt it at 1400°C for 3 hours to obtain a defect-free molten glass, and obtain fly ash glass after water quenching;

(3) After cleaning, selecting and decontaminating the above-mentioned fly ash glass, put it into a platinum-rhodium alloy crucible, heat it up to 1350°C and keep it warm for 2 hours, then draw it at 1280°C according to the viscosity of the glass liquid, and draw it During the process, the sizing agent is applied, and the drawn glass fibers are dried at 110°C for 6 hours to obtain glass fibers, which are numbered and packaged for storage.

The tensile strength performance of the glass fiber obtained in this embodiment was tested, and the result is shown in FIG. 2 , the tensile strength reached 3.18 GPa. The softening point temperature of the glass fiber obtained in this example is as high as 905° C., and the mass retention rate reaches 94.6% after soaking with 3 mol/L hydrochloric acid for 24 hours.

Comparative example 1

Ordinary E-glass fiber is prepared by high-temperature melting method by using industrial raw materials such as quartz sand and alumina.

The tensile strength performance of the glass fiber obtained in this comparative example was tested. The tensile strength was 3.08GPa, the softening point temperature was 850°C, and the mass retention rate was only 76.5% after soaking in 3mol/L hydrochloric acid for 24 hours. Table 2 shows the performance comparison with the glass fiber prepared by using fly ash as the main raw material in Examples 1-4.

Table 2 Performance comparison of glass fiber products with different components

It can be seen that the performance comparison between the glass fiber with fly ash as the main raw material of the present invention and ordinary glass fiber products shows that the glass fiber with fly ash as the main raw material of the present invention has excellent properties of high strength, corrosion resistance and high temperature resistance.

Claims (10)

1. A glass fiber with fly ash as the main raw material, characterized in that: the raw material components comprising the following mass percentages: 25-75% of fly ash, 5-30% of quartz sand, 5-25% of calcite, white cloud Stone 0-5%, other ingredients 5-20%. 2. A kind of glass fiber with fly ash as the main raw material according to claim 1, characterized in that: the fly ash is a fly ash for a power plant, wherein the power plant is selected from a pulverized coal power plant, coal One or more of mud power plants or biomass power plants. 3. A glass fiber with fly ash as the main raw material according to claim 1, characterized in that: said other components are broken glass or industrial slag. 4. The glass fiber with fly ash as the main raw material according to claim 1, characterized in that: the drawn diameter of the glass fiber is 10-20 μm. 5. a kind of preparation method taking fly ash as the glass fiber of main raw material as claimed in claim 1, comprising: (1) After uniformly mixing and grinding fly ash, quartz sand, calcite, dolomite and other ingredients, add additives to obtain a mixture; (2) melting the mixture obtained in step (1) to obtain molten glass, and obtaining fly ash glass after water quenching; (3) The fly ash glass obtained in the step (2) is cleaned, selected and decontaminated, then drawn, and then dried to obtain the final glass fiber. 6 . A method for preparing glass fiber with fly ash as the main raw material according to claim 5 , wherein the additive in the step (1) is a glass clarifying agent selected from Glauber's salt or CeO ₂ . 7. A method for preparing glass fibers with fly ash as the main raw material according to claim 5, characterized in that: the melting process parameters in the step (2) are: melting temperature 1350 ~ 1450 ℃, the melting time is 3~4h. 8. A method for preparing glass fiber with fly ash as the main raw material according to claim 5, characterized in that: the process parameters of the wire drawing in the step (3) are: firstly, the temperature is raised to 1300-1400°C , keep warm for 1.5-2.5 hours, and draw at 1200-1280°C according to the viscosity of the glass liquid. 9. A method for preparing glass fibers using fly ash as the main raw material according to claim 5, characterized in that: the process parameters of the drying in the step (3) are: the drying temperature is 85 ~ 110℃, drying time is 6~12h. 10 . A method for preparing glass fibers with fly ash as the main raw material according to claim 5 , characterized in that: the sizing is applied during the drawing process in the step (3). 11 .