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

Abstract

This invention relates to the field of glass wool technology and proposes high-resilience, fire-resistant, and thermal-insulating glass wool and its preparation method. The raw materials for the high-resilience, fire-resistant, and thermal-insulating glass wool include the following components by weight: 70-75 parts waste glass, 2-5 parts borax pentahydrate, 3-7 parts soda ash, and 8-15 parts mobile phone screen glass. The raw materials for the mobile phone screen glass include waste mobile phone screens and an additive, with the weight ratio of waste mobile phone screens to additive being 6-13:2. The additive includes sodium fluorosilicate. This technical solution addresses the low rebound rate and tensile strength issues of fire-resistant and thermal-insulating glass wool in related technologies.

Description

Technical Field

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

[0002] As an insulation material, fire-resistant glass wool offers exceptional fire resistance and superior thermal insulation. It can be cut and trimmed to suit specific needs, offering flexible installation options and adapting perfectly to building surfaces of varying shapes and sizes. It has a wide range of industrial applications, including high-rise buildings, chemical plants, and refineries.

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

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

[0005] The technical solutions of the present invention are as follows:

[0006] 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;

[0007] The raw materials of the mobile phone screen glass include waste mobile phone screens and additives;

[0008] The weight ratio of the waste mobile phone screen to the additive is 6-13:2;

[0009] The auxiliary agent includes sodium fluorosilicate.

[0010] 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%, Al2O3 0.5%~1%, K2O 0.1%~0.4%, Fe2O3 0.2%~0.6%, and the rest is SiO2 and other inevitable impurities.

[0011] 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.

[0012] In the present invention, the waste mobile phone screen contains SrO. The introduction of Sr element can further improve the rebound rate and tensile strength of the fire-resistant heat-insulating glass wool.

[0013] As a further technical solution, the auxiliary agent further includes potassium borofluoride;

[0014] The weight ratio of the sodium fluorosilicate to the potassium fluoroborate is 1:3 to 3:1.

[0015] In this invention, the inventors discovered that the addition of potassium fluoroborate to the additive further improved the rebound rate and tensile strength of the fire-resistant and thermal insulating glass wool. It is speculated that sodium fluorosilicate and potassium fluoroborate can produce a synergistic effect, further enhancing the strengthening effect of the mobile phone screen glass, thereby further improving the rebound rate and tensile strength of the fire-resistant and thermal insulating glass wool.

[0016] As a further technical solution, the weight of the sodium fluorosilicate is greater than the weight of the potassium fluoroborate.

[0017] In the present invention, when the weight ratio of sodium fluorosilicate to potassium fluoroborate is 1:3 to 3:1 and the weight of sodium fluorosilicate is greater than the weight of potassium fluoroborate, the rebound rate and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved.

[0018] As a further technical solution, the weight ratio of the sodium fluorosilicate to the potassium fluoroborate is 3:1.

[0019] In the present invention, when the weight ratio of sodium fluorosilicate to potassium fluoroborate is 3:1, the rebound rate and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved.

[0020] As a further technical solution, the method for preparing the mobile phone screen glass object includes the following steps: mixing the raw materials of the mobile phone screen glass object evenly and melting them to obtain the mobile phone screen glass object.

[0021] As a further technical solution, the temperature during the melting is 1300-1400°C.

[0022] The present invention also provides a method for preparing the high-resilience fire-resistant thermal insulation glass wool, comprising the following steps:

[0023] S1. Evenly mix and melt the raw materials of refractory and heat-insulating glass wool to obtain molten glass;

[0024] S2. The glass liquid is centrifuged and stretched to obtain the fire-resistant and heat-insulating glass wool.

[0025] As a further technical solution, in step S1, the temperature during the melting is 1400-1500°C.

[0026] The working principle and beneficial effects of the present invention are:

[0027] In the present invention, the raw materials of the fire-resistant and 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 and heat-insulating glass wool has good rebound rate and tensile strength. DETAILED DESCRIPTION

[0028] 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 embodiments described 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 making any creative efforts are within the scope of protection of the present invention.

[0029] In the following examples and comparative examples, unless otherwise specified, the content of B2O3 in borax pentahydrate is 48.5 wt%, the content of Na2O is 21.6 wt%; and the purity of soda ash is 99.5 wt%.

[0030] Example 1

[0031] A method for preparing high-resilience fire-resistant thermal insulation glass wool comprises the following steps:

[0032] S1. Mix 70 parts of waste glass, 2 parts of borax pentahydrate, 3 parts of soda ash, and 8 parts of mobile phone screen glass, and melt them at 1400° C. to obtain glass liquid;

[0033] The method for preparing the mobile phone screen glass material comprises the following steps: uniformly mixing 6 parts of waste mobile phone screens and 2 parts of sodium fluorosilicate, and melting them at 1300° C. to obtain the mobile phone screen glass material;

[0034] 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;

[0035] 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 is SiO2 and other inevitable impurities;

[0036] S2. After the glass liquid is centrifuged and stretched in a centrifuge, fire-resistant and heat-insulating glass wool is obtained.

[0037] Example 2

[0038] A method for preparing high-resilience fire-resistant thermal insulation glass wool comprises the following steps:

[0039] S1. Mix 75 parts of waste glass, 5 parts of borax pentahydrate, 7 parts of soda ash, and 15 parts of mobile phone screen glass, and melt them at 1500° C. to obtain glass liquid;

[0040] The method for preparing the mobile phone screen glass material comprises the following steps: uniformly mixing 13 parts of waste mobile phone screens and 2 parts of sodium fluorosilicate, and melting them at 1400° C. to obtain the mobile phone screen glass material;

[0041] Waste glass consists of the following components in weight percentage: Na2O 16%, CaO 10%, MgO 5%, Al2O31%, K2O 0.4%, Fe2O3 0.6%, and the rest is SiO2 and other inevitable impurities;

[0042] Waste mobile phone screens are composed of the following components in weight percentage: Al2O3 17%, CaO 6%, MgO 5%, Na2O 0.5%, SrO 8%, B2O3 10%, and the rest is SiO2 and other inevitable impurities;

[0043] S2. After the glass liquid is centrifuged and stretched in a centrifuge, fire-resistant and heat-insulating glass wool is obtained.

[0044] Example 3

[0045] 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.

[0046] Example 4

[0047] The only difference between this embodiment and embodiment 2 is that in this embodiment, the method for preparing the mobile phone screen glass material includes the following steps: 13 parts of waste mobile phone screens and 2 parts of potassium fluoroborate are uniformly mixed, and melted at 1400° C. to obtain the mobile phone screen glass material.

[0048] Example 5

[0049] The only difference between this embodiment and embodiment 2 is that in this embodiment, the method for preparing the mobile phone screen glass material includes the following steps: 13 parts of waste mobile phone screens, 0.25 parts of sodium fluorosilicate and 1.75 parts of potassium fluoroborate are uniformly mixed, and melted at 1400°C to obtain the mobile phone screen glass material.

[0050] Example 6

[0051] The only difference between this embodiment and embodiment 5 is that, in this embodiment, when preparing the mobile phone screen glass, the weight portion of sodium fluorosilicate is 1.75 parts, and the weight portion of potassium borofluoride is 0.25 parts.

[0052] Example 7

[0053] The only difference between this embodiment and embodiment 5 is that, in this embodiment, when preparing the mobile phone screen glass, the weight portion of sodium fluorosilicate is 0.5 parts, and the weight portion of potassium borofluoride is 1.5 parts.

[0054] Example 8

[0055] The only difference between this embodiment and embodiment 5 is that, in this embodiment, when preparing the mobile phone screen glass, the weight portion of sodium fluorosilicate is 1 part and the weight portion of potassium borofluoride is 1 part.

[0056] Example 9

[0057] The only difference between this embodiment and embodiment 5 is that, in this embodiment, when preparing the mobile phone screen glass, the weight portion of sodium fluorosilicate is 1.5 parts, and the weight portion of potassium borofluoride is 0.5 parts.

[0058] Comparative Example 1

[0059] The only difference between this comparative example and Example 1 is that in this comparative example, no mobile phone screen glass is added.

[0060] Comparative Example 2

[0061] The only 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.

[0062] Comparative Example 3

[0063] 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.

[0064] The average fiber diameter of the fire-resistant and thermal insulating glass wool prepared in Examples 1-9 was measured in accordance with GB / T 5480-2017, "Test methods for mineral wool and its products," and the results showed that the average fiber diameter was 5-6 μm. The thermal conductivity of the fire-resistant and thermal insulating glass wool prepared in Examples 1-9 at an average temperature of 70°C was measured in accordance with GB / T 10295-2008, "Determination of steady-state thermal resistance and related properties of thermal insulation materials - Heat flow meter method," and the results showed that the thermal conductivity was 0.034-0.039 W / (m·K). The combustion performance of the fire-resistant and thermal insulating glass wool prepared in Examples 1-9 was measured in accordance with GB8624-2012, "Classification of combustion behavior of building materials and products," and the results showed that the combustion performance was Class A (A1).

[0065] The refractory and 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 into 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:

[0066] ① Rebound rate: Measure the initial thickness H0 of the sample, compress the sample under a pressure of 0.1 MPa until the thickness no longer changes, record the thickness at this time H1, release the pressure to allow the sample to return to a free state, record the thickness at this time H2, and calculate the rebound rate according to the following formula: Rebound rate = (H2-H1) / (H0-H1)×100%, round the result to one decimal place;

[0067] ②Tensile strength: Stretch the sample at a speed of 100 mm / min and record the tensile strength when the sample is broken, with the result rounded to one decimal place.

[0068] The test results are shown in Table 1 below.

[0069] Table 1 Rebound rate and tensile strength test results

[0070]

[0071] A comparison of Example 1 and Comparative Examples 1-2 shows that the mobile phone screen glass material can improve the resilience and tensile strength of the fire-resistant and thermal insulating glass wool while reducing the amount of borax pentahydrate used. A comparison of Example 1 and Comparative Example 3 shows that adding waste mobile phone screens and sodium fluorosilicate in the form of mobile phone screen glass material significantly improves the resilience and tensile strength of the fire-resistant and thermal insulating glass wool, compared to directly adding waste mobile phone screens and sodium fluorosilicate.

[0072] Comparison between Example 2 and Example 3 shows that when the waste mobile phone screen contains SrO, the rebound rate and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved. Comparison between Examples 2 and 4 and Examples 5 to 9 shows that when the additive also includes potassium borofluoride, the rebound rate 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 rebound rate 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 rebound rate 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 rebound rate and tensile strength of the fire-resistant and thermal insulating glass wool can be further improved.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high resilience fire-resistant thermal insulation glass wool, 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 agents include sodium fluorosilicate and potassium borofluoroate; The weight ratio of the sodium fluorosilicate to the potassium fluoroborate is 1:3 to 3:1; 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; The method for preparing the mobile phone screen glass comprises the following steps: uniformly mixing raw materials of the mobile phone screen glass, and melting the raw materials to obtain the mobile phone screen glass.

2. The high resilience fire-resistant thermal insulation glass wool according to claim 1, characterized in that: The waste glass is composed of the following components in weight percentage: Na2O 12%-16%, CaO 6%-10%, MgO 2%-5%, Al2O3 0.5%-1%, K2O 0.1%-0.4%, Fe2O3 0.2%-0.6%, and the rest is SiO2 and other inevitable impurities.

3. The high-resilience fire-resistant thermal insulation glass wool according to claim 1, characterized in that: The weight of the sodium fluorosilicate is greater than the weight of the potassium fluoroborate.

4. The high-resilience fire-resistant thermal insulation glass wool according to claim 3, characterized in that: The weight ratio of the sodium fluorosilicate to the potassium fluoroborate is 3:

1.

5. The high resilience fire-resistant thermal insulation glass wool according to claim 1, characterized in that: During the melting process, the temperature is 1300-1400°C.

6. A method for preparing high-resilience fire-resistant thermal insulation glass wool according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Evenly mix and melt the raw materials of refractory and heat-insulating glass wool to obtain molten glass; S2. The glass liquid is centrifuged and stretched to obtain the fire-resistant and heat-insulating glass wool.

7. The method for preparing high-resilience fire-resistant thermal insulation glass wool according to claim 6, characterized in that: In step S1, the temperature during melting is 1400-1500°C.

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