High-resilience fire-resistant thermal-insulation glass wool and preparation method thereof

Abstract

The invention relates to the technical field of glass wool, and provides high-resilience fire-resistant heat-preservation glass wool and a preparation method thereof.The high-resilience fire-resistant heat-preservation glass wool is prepared from, by weight, 70-75 parts of waste glass, 2-5 parts of borax pentahydrate, 3-7 parts of sodium carbonate and 8-15 parts of mobile phone screen glass. The raw materials of the mobile phone screen glass object comprise a waste mobile phone screen and an auxiliary agent; the weight ratio of the waste mobile phone screen to the auxiliary agent is (6-13): 2; the auxiliary agent comprises sodium fluosilicate. According to the technical scheme, the problems of low rebound rate and tensile strength of the fire-resistant heat-insulating glass wool in related technologies are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of glass wool, and in particular to high-resilience fire-resistant heat-insulating glass wool and a preparation method thereof. Background Art

[0002] As a thermal insulation material, fire-resistant glass wool has excellent fire resistance and excellent thermal insulation performance. At the same time, it can be cut and cut according to actual use needs, and the installation method is flexible and diverse. It can perfectly adapt to the surfaces of buildings of different shapes and sizes. It has a wide range of applications in the industrial field, such as high-rise buildings, chemical plants and refineries.

[0003] However, the existing fire-resistant thermal insulation glass wool has the problem of low rebound rate and tensile strength, which greatly limits its application in complex industrial environments. In view of this, in order to further broaden the application scenarios of fire-resistant thermal insulation glass wool, it is of great significance to develop a fire-resistant thermal insulation cotton with higher rebound rate and tensile strength. Summary of the invention

[0004] The present invention provides a high-resilience fire-resistant heat-insulating glass wool and a preparation method thereof, which solves the problem of low rebound rate and tensile strength of the fire-resistant heat-insulating glass wool in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a high-resilience fire-resistant heat-insulating glass wool, the raw materials of which include the following components in parts by weight: 70-75 parts of waste glass, 2-5 parts of borax pentahydrate, 3-7 parts of soda ash, and 8-15 parts of mobile phone screen glass; The raw materials of the mobile phone screen glass include waste mobile phone screens and additives; The weight ratio of the waste mobile phone screen to the additive is 6-13:2; The auxiliary agent includes sodium fluorosilicate.

[0006] As a further technical solution, the waste glass is composed of the following components in weight percentage: Na2O 12%~16%, CaO 6%~10%, MgO 2%~5%, Al2O30.5%~1%, K2O 0.1%~0.4%, Fe2O30.2%~0.6%, and the rest is SiO2 and other inevitable impurities.

[0007] As a further technical solution, the waste mobile phone screen is composed of the following components in weight percentage: Al2O3 13%~17%, CaO 3%~6%, MgO 2%~5%, Na2O 0.1%~0.5%, SrO 4%~8%, B2O3 6%~10%, and the rest is SiO2 and other inevitable impurities.

[0008] In the present invention, the waste mobile phone screen contains SrO. The introduction of Sr element can further improve the resilience and tensile strength of the fire-resistant heat-insulating glass wool.

[0009] As a further technical solution, the auxiliary agent also includes potassium borofluoride; The weight ratio of the sodium fluorosilicate to the potassium fluoroborate is 1:3 to 3:1.

[0010] In the present invention, the inventors found that when the additive also includes potassium fluoroborate, the rebound rate and tensile strength of the fire-resistant thermal insulation glass wool can be further improved. It is speculated that sodium fluorosilicate and potassium fluoroborate can produce a synergistic effect to further enhance the strengthening effect of the mobile phone screen glass, thereby further improving the rebound rate and tensile strength of the fire-resistant thermal insulation glass wool.

[0011] As a further technical solution, the weight of the sodium fluorosilicate is greater than the weight of the potassium borofluorate.

[0012] In the present invention, when the weight ratio of sodium fluorosilicate to potassium borofluorate is 1:3-3:1 and the weight of sodium fluorosilicate is greater than the weight of potassium borofluorate, the resilience and tensile strength of the fire-resistant thermal insulation glass wool can be further improved.

[0013] As a further technical solution, the weight ratio of the sodium fluorosilicate to the potassium borofluorite is 3:1.

[0014] In the present invention, when the weight ratio of sodium fluorosilicate to potassium borofluorate is 3:1, the resilience and tensile strength of the fire-resistant thermal insulation glass wool can be further improved.

[0015] As a further technical solution, the method for preparing the mobile phone screen glass material comprises the following steps: mixing the raw materials of the mobile phone screen glass material evenly, and melting them to obtain the mobile phone screen glass material.

[0016] As a further technical solution, during the melting, the temperature is 1300-1400°C.

[0017] The present invention also provides a method for preparing the high-resilience fire-resistant thermal insulation glass wool, comprising the following steps: S1, mixing the raw materials of refractory heat-insulating glass wool uniformly, melting them, and obtaining glass liquid; S2. The glass liquid is centrifuged and stretched to obtain the fire-resistant heat-insulating glass wool.

[0018] As a further technical solution, in step S1, the temperature during melting is 1400-1500°C.

[0019] The working principle and beneficial effects of the present invention are: In the present invention, the raw materials of the fire-resistant heat-insulating glass wool include mobile phone screen glass. By adding mobile phone screen glass made of waste mobile phone screens and sodium fluorosilicate as raw materials, on the one hand, the waste mobile phone screens can be reused and the production cost can be reduced; on the other hand, the use amount of borax pentahydrate can be reduced while the fire-resistant heat-insulating glass wool has good resilience and tensile strength. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In the following examples and comparative examples, unless otherwise specified, the content of B2O3 in borax pentahydrate is 48.5wt%, the content of Na2O is 21.6wt%; and the purity of soda ash is 99.5wt%.

[0022] Example 1 A method for preparing high-resilience fire-resistant thermal insulation glass wool comprises the following steps: S1. By weight, 70 parts of waste glass, 2 parts of borax pentahydrate, 3 parts of soda ash, and 8 parts of mobile phone screen glass are mixed evenly, and melted at 1400° C. to obtain glass liquid; The preparation method of the mobile phone screen glass material comprises the following steps: 6 parts of waste mobile phone screens and 2 parts of sodium fluorosilicate are uniformly mixed, and melted at 1300° C. to obtain the mobile phone screen glass material; Waste glass consists of the following components in weight percentage: Na2O 12%, CaO 6%, MgO 2%, Al2O3 0.5%, K2O 0.1%, Fe2O3 0.2%, and the rest is SiO2 and other inevitable impurities; Waste mobile phone screens are composed of the following components in weight percentage: Al2O313%, CaO 3%, MgO 2%, Na2O 0.1%, SrO 4%, B2O36%, and the rest are SiO2 and other inevitable impurities; S2. After the glass liquid is centrifuged and stretched in a centrifuge, fire-resistant and heat-insulating glass wool is obtained.

[0023] Example 2 A method for preparing high-resilience fire-resistant thermal insulation glass wool comprises the following steps: S1. By weight, 75 parts of waste glass, 5 parts of borax pentahydrate, 7 parts of soda ash, and 15 parts of mobile phone screen glass are mixed evenly, and melted at 1500° C. to obtain glass liquid; The preparation method of the mobile phone screen glass material comprises the following steps: 13 parts of waste mobile phone screens and 2 parts of sodium fluorosilicate are uniformly mixed, and melted at 1400° C. to obtain the mobile phone screen glass material; Waste glass consists of the following components in weight percentage: Na2O 16%, CaO 10%, MgO 5%, Al2O31%, K2O0.4%, Fe2O30.6%, and the rest is SiO2 and other inevitable impurities; Waste mobile phone screens are composed of the following components in weight percentage: Al2O317%, CaO 6%, MgO 5%, Na2O 0.5%, SrO 8%, B2O310%, and the rest are SiO2 and other inevitable impurities; S2. After the glass liquid is centrifuged and stretched in a centrifuge, fire-resistant and heat-insulating glass wool is obtained.

[0024] Example 3 The only difference between this embodiment and embodiment 2 is that in this embodiment, the waste mobile phone screen is composed of the following components in weight percentage: Al2O3 17%, CaO 6%, MgO 5%, Na2O 0.5%, B2O3 10%, and the rest is SiO2 and other inevitable impurities.

[0025] Example 4 The only difference between this embodiment and embodiment 2 is that in this embodiment, the method for preparing the mobile phone screen glass material comprises the following steps: 13 parts of waste mobile phone screens and 2 parts of potassium borofluoride are uniformly mixed, and melted at 1400° C. to obtain the mobile phone screen glass material.

[0026] Example 5 The only difference between this embodiment and embodiment 2 is that in this embodiment, the method for preparing the mobile phone screen glass material comprises the following steps: 13 parts of waste mobile phone screens, 0.25 parts of sodium fluorosilicate and 1.75 parts of potassium borofluoride are uniformly mixed, and melted at 1400°C to obtain the mobile phone screen glass material.

[0027] Example 6 The only difference between this embodiment and embodiment 5 is that in this embodiment, when preparing the mobile phone screen glass material, the weight portion of sodium fluorosilicate is 1.75 parts, and the weight portion of potassium borofluorate is 0.25 parts.

[0028] Example 7 The only difference between this embodiment and embodiment 5 is that in this embodiment, when preparing the mobile phone screen glass material, the weight portion of sodium fluorosilicate is 0.5 parts and the weight portion of potassium borofluorate is 1.5 parts.

[0029] Example 8 The only difference between this embodiment and embodiment 5 is that in this embodiment, when preparing the mobile phone screen glass material, the weight portion of sodium fluorosilicate is 1 part and the weight portion of potassium borofluorate is 1 part.

[0030] Example 9 The only difference between this embodiment and embodiment 5 is that in this embodiment, when preparing the mobile phone screen glass material, the weight portion of sodium fluorosilicate is 1.5 parts and the weight portion of potassium borofluorate is 0.5 parts.

[0031] Comparative Example 1 The only difference between this comparative example and Example 1 is that in this comparative example, no mobile phone screen glass is added.

[0032] Comparative Example 2 The difference between this comparative example and Example 1 is that in this comparative example, no mobile phone screen glass is added, and the weight portion of borax pentahydrate added is 10 parts.

[0033] Comparative Example 3 The only difference between this comparative example and Example 1 is that in step S1 of this comparative example, 70 parts of waste glass, 2 parts of borax pentahydrate, 3 parts of soda ash, 6 parts of waste mobile phone screens and 2 parts of sodium fluorosilicate are mixed uniformly by weight and melted at 1400° C. to obtain glass liquid.

[0034] The average fiber diameter of the fire-resistant thermal insulation glass wool prepared in Examples 1 to 9 was tested with reference to GB / T 5480-2017 "Test methods for mineral wool and its products", and the results showed that the average fiber diameter was 5 to 6 μm. The thermal conductivity of the fire-resistant thermal insulation glass wool prepared in Examples 1 to 9 at an average temperature of 70°C was measured with reference to GB / T 10295-2008 "Determination of steady-state thermal resistance and related properties of thermal insulation materials by heat flow meter method", and the results showed that the thermal conductivity was 0.034 to 0.039 W / (m·K). The combustion performance of the fire-resistant thermal insulation glass wool prepared in Examples 1 to 9 was measured with reference to GB8624-2012 "Classification of combustion performance of building materials and products", and the results showed that the combustion performance was A (A1) grade.

[0035] The fire-resistant heat-insulating glass wool prepared in Examples 1 to 9 and Comparative Examples 1 to 3 was dispersed in water to form a uniform slurry of 2 wt‰. The slurry was copied on a circular copying machine to form a circular paper sheet with a thickness of 50 mm and a diameter of 200 mm. After the circular paper sheet was dried, it was cut into samples of 15 mm × 100 mm × 50 mm. The samples were subjected to the following performance tests: ① Rebound rate: Measure the initial thickness H0 of the sample, compress the sample under a pressure of 0.1MPa until the thickness no longer changes, record the thickness H1 at this time, release the pressure to allow the sample to return to a free state, record the thickness H2 at this time, and calculate the rebound rate according to the following formula: Rebound rate = (H2-H1) / (H0-H1)×100%, and keep one decimal place for the result; ②Tensile strength: Stretch the sample at a speed of 100 mm / min, and record the tensile strength when the sample is broken, with one decimal place retained.

[0036] The test results are shown in Table 1 below.

[0037] Table 1 Rebound rate and tensile strength test results

[0038] Comparison between Example 1 and Comparative Examples 1 and 2 shows that the mobile phone screen glass material can make the fire-resistant thermal insulation glass wool have good resilience and tensile strength while reducing the amount of borax pentahydrate used. Comparison between Example 1 and Comparative Example 3 shows that compared with directly adding waste mobile phone screens and sodium fluorosilicate, adding waste mobile phone screens and sodium fluorosilicate in the form of mobile phone screen glass material can significantly improve the resilience and tensile strength of the fire-resistant thermal insulation glass wool.

[0039] Comparison between Example 2 and Example 3 shows that when the waste mobile phone screen contains SrO, the resilience and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved. Comparison between Examples 2, 4 and Examples 5 to 9 shows that when the auxiliary agent also includes potassium borofluoride, the resilience and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved. Comparison between Examples 5 to 6 and Examples 7 to 9 shows that when the weight ratio of sodium fluorosilicate and potassium borofluoride is 1:3 to 3:1, the resilience and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved. Comparison between Example 9 and Examples 7 to 8 shows that when the weight ratio of sodium fluorosilicate and potassium borofluoride is 1:3 to 3:1 and the weight of sodium fluorosilicate is greater than the weight of potassium borofluoride, the resilience and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved. Comparison between Example 9 and Examples 5 to 8 shows that when the weight ratio of sodium fluorosilicate to potassium borofluorate is 3:1, the resilience and tensile strength of the fire-resistant thermal insulation glass wool can be further improved.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high resilience fire-resistant thermal insulation glass wool, It is characterized in that The raw materials include the following components in parts by weight: 70-75 parts of waste glass, 2-5 parts of borax pentahydrate, 3-7 parts of soda ash, and 8-15 parts of mobile phone screen glass; The raw materials of the mobile phone screen glass include waste mobile phone screens and additives; The weight ratio of the waste mobile phone screen to the additive is 6-13:2; The auxiliary agent includes sodium fluorosilicate.

2. The high resilience fire-resistant heat-insulating glass wool according to claim 1, It is characterized in that The waste glass is composed of the following components in weight percentage: Na 2 O 12%~16%, CaO 6%~10%, MgO 2%~5%, Al 2 O 3 0.5%~1%, K 2 O0.1%~0.4%, Fe 2 O 3 0.2%~0.6%, the rest is SiO 2 and other inevitable impurities.

3. The high resilience fire-resistant heat-insulating glass wool according to claim 1, It is characterized in that The waste mobile phone screen is composed of the following components in percentage by weight: Al 2 O 3 13%~17%, CaO 3%~6%, MgO 2%~5%, Na 2 O 0.1%~0.5%, SrO4%~8%, B 2 O 3 6%~10%, the rest is SiO 2 and other inevitable impurities.

4. The high resilience fire-resistant heat-insulating glass wool according to claim 1, It is characterized in that The auxiliary agent also includes potassium borofluoride; The weight ratio of the sodium fluorosilicate to the potassium fluoroborate is 1:3 to 3:

1.

5. The high resilience fire-resistant heat-insulating glass wool according to claim 4, It is characterized in that The weight of the sodium fluorosilicate is greater than the weight of the potassium borofluorate.

6. The high resilience fire-resistant heat-insulating glass wool according to claim 5, It is characterized in that The weight ratio of the sodium fluorosilicate to potassium fluoroborate is 3:

1.

7. A high resilience fire-resistant thermal insulation glass wool according to any one of claims 1 to 6, It is characterized in that The preparation method of the mobile phone screen glass comprises the following steps: mixing raw materials of the mobile phone screen glass uniformly, and melting them to obtain the mobile phone screen glass.

8. The high resilience fire-resistant heat-insulating glass wool according to claim 7, It is characterized in that During the melting, the temperature is 1300-1400°C.

9. A method for preparing the high resilience fire-resistant thermal insulation glass wool according to any one of claims 1 to 8, It is characterized in that The following steps are involved: S1, mixing the raw materials of refractory heat-insulating glass wool uniformly, melting them, and obtaining glass liquid; S2. The glass liquid is centrifuged and stretched to obtain the fire-resistant heat-insulating glass wool.

10. The method for preparing high-resilience fire-resistant thermal insulation glass wool according to claim 9, It is characterized in that In step S1, the temperature during melting is 1400-1500°C.

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