Borosilicate glass batching materials, preparation methods, and borosilicate glass itself.

Abstract

This disclosure pertains to the field of glass manufacturing, specifically relating to a batching material, preparation method, and borosilicate glass. The batching material for borosilicate glass disclosed herein includes raw materials, cullet, and overflow material. By mass percentage, raw materials account for 50-70%, cullet accounts for 20-40%, and overflow material accounts for 10-30%. The overflow material composition, by mass percentage, includes: SiO2 74-75%, Al2O3 5.4-5.6%, Na2O 5.7-5.9%, K2O 1.5-1.6%, total CaO and BaO 1.2-1.3%, B2O3 9.8-10%, and impurities 0.8-2.2%. The present invention introduces overflow material as a supplementary source of cullet in the batching material, which is beneficial to the stability of borosilicate glass, saves production costs, reduces resource waste, and is conducive to environmental protection. Glass produced using the batching material of the present invention has fewer defects such as stones and nodules, better mechanical impact resistance, and a comprehensive pass rate of over 80%.

Description

Technical Field

[0001] This disclosure pertains to the field of glass manufacturing, specifically relating to a batching material and preparation method for borosilicate glass, as well as the borosilicate glass itself. Background Technology

[0002] Currently, in actual production, we have found that borosilicate glass is prone to stratification during melting. Due to boron volatilization, a silicon-rich altered layer, commonly known as "skin," forms on the surface of the melting pool near the flow channel. This skin can form streaks or lumps in the forming flow, necessitating continuous renewal of the molten glass in this area to reduce the accumulation of altered glass and its entry into the flow channel. Therefore, in the design of borosilicate glass melting furnaces, overflow outlets are installed in the melting pool, at the low-temperature section of the working pool, and near the discharge port of the feed channel to discharge the altered glass from the surface. Monitoring shows that the overflow rate can reach up to 20% of the total feed volume, resulting in significant waste of raw materials and energy.

[0003] However, none of the existing technologies mention the reuse of overflow materials. For example, the existing technology CN 105271743A discloses a formula and production method for neutral silica-bonded glass pharmaceutical tubes, which contains the following components by weight: 260-280 parts of quartz sand; 14-18 parts of lepidolite; 25-35 parts of aluminum hydroxide; 3-5 parts of fluorite; 80-100 parts of borax pentahydrate; 4.5-6 parts of soda ash; 9-12 parts of sodium nitrate; 3-4.5 parts of potassium carbonate; 4.5-5.5 parts of barium carbonate; 4-5 parts of composite glass clarifying agent; and 120-140 parts of crushed glass. However, the method does not provide any inspiration for the reuse of overflow materials.

[0004] Existing technology CN109111106A discloses a formula and production method for a neutral borosilicate glass pharmaceutical tube. The formula for the neutral borosilicate glass pharmaceutical tube includes the following raw materials by weight percentage: silicon dioxide 74.5%–78.3%, boron trioxide 8.8%–11.1%, aluminum trioxide 3.2%–4.6%, lanthanum oxide 0.1%–0.4%, divalent metal oxides 2.4%–3.8%, glass additives 0.1%–0.4%, and the balance being monovalent metal oxides. The production method for the neutral borosilicate glass pharmaceutical tube includes the following steps: S1, preparing raw materials; S2, heating the raw materials and adding glass additives in two batches; S3, drawing and molding. This method also does not solve the problem of reusing overflow material during the production process.

[0005] In actual production, the proportion of crushed glass in the batch is generally 20% to 40%, and a fixed proportion of crushed glass is beneficial to product stability. However, due to the continuous consumption of crushed glass during production, the amount of self-produced and recycled crushed glass gradually decreases to a shortage as the product qualification rate improves. At the same time, the overflow material in the production process is directly destroyed as waste. Existing technologies do not provide a solution to the shortage of crushed glass while reusing overflow material. There is an urgent need to develop a production method that can further save production costs, reduce resource waste, and benefit environmental protection. Summary of the Invention

[0006] One of the technical problems this disclosure aims to solve is: while ensuring the performance indicators of borosilicate glass products in all aspects, to recycle and reuse the overflow material wasted during the production process, thereby further saving production costs, reducing resource waste, and benefiting environmental protection.

[0007] To solve the above-mentioned technical problems, on the one hand, the present disclosure provides a borosilicate glass batch material, which includes raw materials, crushed glass and overflow material, wherein, by mass percentage, the raw materials account for 50-70%, the crushed glass accounts for 20-40%, and the overflow material accounts for 10-30%;

[0008] The overflow material composition, by mass percentage, includes: SiO2 74–75%, Al2O3 5.4–5.6%, Na2O 5.7–5.9%, K2O 1.5–1.6%, total CaO and BaO 1.2–1.3%, B2O3 9.8–10%, and impurities 0.8–2.2%.

[0009] Furthermore, the amount of borax and sodium carbonate silica sand added to the raw materials is adjusted based on the mass of B2O3 in the added overflow material.

[0010] In some embodiments, based on the above embodiments, the raw materials include: quartz sand, alumina, borax, calcium carbonate, sodium carbonate, potassium carbonate, and additives.

[0011] In some embodiments, based on the above embodiments, the raw materials account for 50-60% by mass, the broken glass accounts for 20%, and the overflow material accounts for 20-30%.

[0012] In some embodiments, based on the above embodiments, the coefficient of thermal expansion of shattered glass is 5.0 × 10⁻⁶. -6 K -1 ~5.2×10 -6 K -1 The diameter of the broken glass is 10.0mm to 35.0mm.

[0013] On the other hand, this disclosure also provides a method for reusing borosilicate glass overflow material, the method including the steps of determining the batch and melting the batch, the step of determining the batch including:

[0014] In glass preparation, overflow material is added to the raw materials and cullet, and the proportion of raw materials is adjusted based on the composition of the overflow material.

[0015] The overflow material composition, by mass percentage, includes: SiO2 74–75%, Al2O3 5.4–5.6%, Na2O 5.7–5.9%, K2O 1.5–1.6%, total CaO and BaO 1.2–1.3%, B2O3 9.8–10%, and impurities 0.8–2.2%.

[0016] The adjustment methods for each component of the raw material are as follows:

[0017] The mass percentage of each component in the overflow material and cullet is determined. Based on the mass percentage of each component in the overflow material, the mass percentage of each component in the raw materials is adjusted so that the components of the borosilicate glass prepared in the melting batching step are within the following ranges, expressed as mass percentages: SiO2 70–75%, Al2O3 5–7%, Na2O 5.8–6.2%, K2O 1.50–1.53%, total content of CaO and BaO 1–3%, B2O3 8–12%, and impurities 1.5–1.72%.

[0018] In some embodiments, based on the above embodiments, the raw materials include, by mass fraction: quartz sand, alumina, borax, calcium carbonate, sodium carbonate, potassium carbonate, and additives.

[0019] In some embodiments, based on the above embodiments, the raw materials account for 50-60% by mass, the crushed glass accounts for 20-40%, and the overflow material accounts for 10-30%.

[0020] On the other hand, this disclosure also provides a method for preparing borosilicate glass, including the aforementioned method, wherein the preparation method includes, in sequence: determining the batch material, weighing and mixing the batch material uniformly, melting the batch material, glass forming, and inspecting the glass.

[0021] In some embodiments, based on the above embodiments, the uniformity of the batching material is 95% or higher.

[0022] On the other hand, this disclosure also provides a borosilicate glass prepared by the aforementioned method.

[0023] The beneficial effects of this disclosure are as follows:

[0024] (1) This disclosure provides a borosilicate glass batch material, which includes raw materials and cullet glass as well as overflow material generated during the production process. The batch material of this disclosure introduces overflow material with specific components as a supplementary source of cullet glass. This is beneficial to the stability of borosilicate glass, saves production costs, reduces waste of resources, and is beneficial to environmental protection. Glass produced using the batch material of this disclosure has fewer defects such as stones and nodules, and has better mechanical impact resistance. The overall pass rate is as high as 80% or more. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A flowchart of a preparation method provided in some embodiments of this disclosure is shown. Detailed Implementation

[0027] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0028] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangements of components illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0029] Furthermore, as used in this disclosure, words such as "including" or "comprising" mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility that other elements may also be covered.

[0030] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0032] This disclosure provides a borosilicate glass batch material, which includes raw materials, chopped glass, and overflow material. The raw materials comprise 50-70% by mass, the chopped glass comprises 20-40%, and the overflow material comprises 10-30%. This includes, but is not limited to, raw materials comprising 50%, 60%, or 70%; chopped glass comprising 20%, 30%, or 40%; and overflow material comprising 10%, 20%, or 30%.

[0033] The overflow material composition, by mass percentage, is: SiO2 74–75%, Al2O3 5.4–5.6%, Na2O 5.7–5.9%, K2O 1.5–1.6%, total CaO and BaO 1.2–1.3%, B2O3 9.8–10%, and impurities 0.8–2.2%.

[0034] The overflow material disclosed herein is generated during the production process of borosilicate glass. This disclosure selects an overflow material with a content similar to that of each component of borosilicate glass as a supplement to the broken glass in the glass production process (the overflow material disclosed herein is a specific component). In this way, the glass prepared by this batch material is not only conducive to the stability of the prepared borosilicate glass, but also saves production costs, reduces resource waste, and is beneficial to environmental protection.

[0035] In some embodiments, based on the above embodiments, the raw materials include: quartz sand, alumina, borax, calcium carbonate, sodium carbonate, potassium carbonate, and additives.

[0036] The specific components mentioned above are specified in the raw materials disclosed herein to ensure the quality of the glass prepared from the batch.

[0037] In some embodiments, based on the above embodiments, the raw materials account for 50-60% by mass, the broken glass accounts for 20%, and the overflow material accounts for 20-30%.

[0038] This disclosure specifies the exact proportions of raw materials, cullet, and overflow material, which can effectively reduce defects such as stones and nodules in the glass, improve the uniformity of the glass thickness, and at the same time ensure that the brittleness of the glass meets quality requirements and that the mechanical impact resistance of the glass meets requirements.

[0039] In some embodiments, based on the above embodiments, the coefficient of thermal expansion of shattered glass is 5.0 × 10⁻⁶. -6 K -1 ~5.2×10 -6 K -1 The diameter of the broken glass is 10.0mm to 35.0mm.

[0040] This disclosure uses chopped glass with a specific coefficient of thermal expansion and diameter, which can further ensure the quality of the prepared glass.

[0041] On the other hand, this disclosure also provides a method for reusing borosilicate glass overflow material, the method including a batch determination step, the batch determination step including:

[0042] In glass preparation, overflow material is added to the raw materials and cullet, and the proportion of raw materials is adjusted based on the composition of the overflow material.

[0043] The overflow material composition, by mass percentage, includes: SiO2 74–75%, Al2O3 5.4–5.6%, Na2O 5.7–5.9%, K2O 1.5–1.6%, total CaO and BaO 1.2–1.3%, B2O3 9.8–10%, and impurities 0.8–2.2%.

[0044] The adjustment methods for each component of the raw material are as follows:

[0045] The mass percentage of each component in the overflow material and cullet is determined. Based on the mass percentage of each component in the overflow material, the mass percentage of each component in the raw materials is adjusted so that the components of the borosilicate glass prepared in the melting batching step are within the following ranges, expressed as mass percentages: SiO2 70–75%, Al2O3 5–7%, Na2O 5.8–6.2%, K2O 1.50–1.53%, total content of CaO and BaO 1–3%, B2O3 8–12%, and impurities 1.5–1.72%.

[0046] In some embodiments, based on the above embodiments, the components of the borosilicate glass prepared in the melting batching step are, by mass percentage, within the following ranges: SiO2 72-74%, Al2O3 5.8-6.2%, Na2O 5.8-6.2%, K2O 1.50-1.53%, total content of CaO and BaO 1.30-1.33%, B2O3 10.5-10.55%, and impurities 1.5-1.72%.

[0047] In some embodiments, based on the above embodiments, the mass of B2O3 in the overflow material is measured and compared with the mass of B2O3 in the rubble to obtain the mass of B2O3 that needs to be added to the raw material as m. a Based on m a The mass of borax to be added to the raw materials is m. bBorax raw materials contain sodium oxide. To maintain the elemental balance of borosilicate glass, excess sodium needs to be subtracted from the raw materials. Generally speaking, the sodium oxide content in borax raw materials is between 20% and 25% by mass. In actual production, a value of 20% is typically used. The calculated excess sodium oxide content in the raw materials is 0.2 mg. b Based on m b The sodium oxide content in the borax raw material is 0.2 mg / L. b The required reduction in sodium carbonate content in the raw materials is:

[0048] (Sodium oxide in borax raw material) / (conversion factor between sodium oxide and sodium carbonate), where the conversion factor is 0.5949, meaning the mass of sodium carbonate that needs to be subtracted from the raw material is 0.2m. b / 0.5849, because the boron (B) in the overflow material volatilizes during actual production, the mass percentage of B2O in the overflow material per unit mass decreases, resulting in an increase in the mass percentage of SiO2 in the overflow material per unit mass. Based on the elemental balance in the batch, the mass of quartz sand in the raw materials is subtracted to ensure that the content of each component in the final glass, expressed as a mass percentage, is within the following range: SiO2 72-74%, Al2O3 5.8-6.2%, Na2O 5.8-6.2%, K2O 1.50-1.53%, total content of CaO and BaO 1.30-1.33%, B2O3 10.5-10.55%, and impurities 1.5-1.72%.

[0049] In some embodiments, based on the above embodiments, the raw materials include: quartz sand, alumina, borax, calcium carbonate, sodium carbonate, potassium carbonate, and additives.

[0050] The additives disclosed herein are commonly used additives in the glass production process, including but not limited to defoamers, colorants, decolorizing agents, clarifying agents, and opacifiers.

[0051] In some embodiments, based on the above embodiments, the raw materials account for 50-60% by mass, the crushed glass accounts for 20-40%, and the overflow material accounts for 10-30%.

[0052] On the other hand, such as Figure 1 As shown, this disclosure also provides a method for preparing borosilicate glass, including the aforementioned method, wherein the preparation method includes, in sequence: determining the batch material, weighing and mixing the batch material uniformly, melting the batch material, glass forming, and inspecting the glass.

[0053] In some embodiments, based on the above embodiments, the uniformity of the batching material is 95% or higher.

[0054] On the other hand, this disclosure also provides a borosilicate glass prepared by the aforementioned method.

[0055] To further illustrate the technical solutions of this disclosure, some more specific embodiments are provided:

[0056] Example 1: Detection of overflow material composition

[0057] This embodiment analyzes the composition of the left and right sides of the overflow material generated by a company after 1 month, 2 months, and 3 months of continuous production, and compares it with normal glass products. The results are shown in Table 1 below.

[0058] The overflow material in this embodiment is derived from the following components, specifically including:

[0059] By unit mass percentage, 60% raw materials and 40% crushed glass are added;

[0060] The raw materials consist of the following components: 73.51 parts of quartz sand (content ≥ 99.3%), 6.06 parts of alumina, 21.43 parts of borax (B2O3 content ≥ 48%, Na2O2 content ≥ 3%), 1.26 parts of calcium carbonate, 2.58 parts of sodium carbonate (purity ≥ 99.2%), 2.33 parts of potassium carbonate, 0.65 parts of barium carbonate, and 0.3 parts of additives.

[0061] All percentages mentioned above are by mass, and the additives are conventional additives in the field, including clarifying agents (cerium oxide and sodium chloride).

[0062] The composition of the chopped glass used in this embodiment, by mass percentage, is: SiO2 74%, Al2O3 6.0%, Na2O 6.0%, K2O 1.6%, total CaO and BaO 1.3%, B2O3 10.5%, and impurities 1.6%.

[0063] Table 1. Comparison of component analysis data of left and right glass overflows with glass tube samples over 3 months (in mass percentage, unit %).

[0064]

[0065] Note: M refers to the month, L is left overflow, R is right overflow, and S refers to the glass tube sample.

[0066] Comparing the data in Table 1 reveals that the composition of the overflow material remained relatively stable over time. The boron trioxide content in the overflow material was lower than that in normal glass, while the silica content was higher. Therefore, it is necessary to adjust the component ratios in the glass batch to compensate for these differences.

[0067] Since the boron trioxide in the overflow material comes from borax and the silicon dioxide comes from quartz sand, and the borax raw material in the overflow material also contains a certain proportion of sodium oxide, the raw material composition needs to be adjusted to balance the various elements in the glass batch. The adjustment method is as follows: the mass of B2O3 in the overflow material is measured and compared with the mass of B2O3 in the crushed glass (referring to crushed glass without the addition of overflow material in the current process), to obtain the mass of B2O3 that needs to be added to the raw material as m. a Based on m a The mass of borax to be added to the raw materials is m. b Since borax raw materials contain sodium oxide, excess sodium needs to be subtracted from the raw materials to maintain the elemental balance of borosilicate glass. Generally speaking, the mass percentage of sodium oxide in borax raw materials is between 20% and 25%. In this embodiment, an approximate value of 20% is taken, and the calculated mass of excess sodium oxide in the raw materials is 0.2 m. b Based on m b The sodium oxide content in the borax raw material is 0.2 mg / L. b The required reduction in sodium carbonate mass from the raw material is calculated as: (sodium oxide in the borax raw material) / (conversion factor between sodium oxide and sodium carbonate). This conversion factor is 0.5949 (a fixed value calculated based on the molecular weights of sodium oxide and sodium carbonate, 62 / 106). Therefore, the required reduction in sodium carbonate mass from the raw material is 0.2 m³. b / 0.5849. Because the boron (B) in the overflow material volatilizes during actual production, the mass percentage of B2O in the overflow material per unit mass decreases, resulting in an increase in the mass percentage of SiO2 in the overflow material per unit mass. Based on the elemental balance in the batch, the mass of quartz sand in the raw materials is subtracted. Additionally, if necessary, the content of other components in the raw materials needs to be adjusted so that the content of each component in the final glass, expressed as a mass percentage, is within the following range: SiO2 72–74%, Al2O3 5.8–6.2%, Na2O 5.8–6.2%, K2O 1.50–1.53%, total content of CaO and BaO 1.30–1.33%, B2O3 10.5–10.55%, and impurities 1.5–1.72%.

[0068] Therefore, based on the above approach, the relationship between the overflow material and the components in the batch material in this disclosure was determined.

[0069] Example 2: Optimization of the content of raw materials, crushed glass, and overflow material in the batch.

[0070] As shown in Table 2, the overflow material of groups 1 to 5 in this embodiment is the overflow material of embodiment 1. The range of each component of the overflow material is as follows: SiO2 74-75%, Al2O3 5.4-5.6%, Na2O 5.7-5.9%, K2O 1.5-1.6%, total CaO and BaO 1.2-1.3%, B2O3 9.8-10%, and impurities 0.8-2.2%.

[0071] The raw materials in this embodiment include: quartz sand, alumina, borax, calcium carbonate, sodium carbonate, potassium carbonate, and additives.

[0072] The content of each specific component of the raw material was fine-tuned according to the content and composition of the overflow material using the method in Example 1.

[0073] The glass shards used in this embodiment have a diameter of 10.0mm to 35.0mm and a coefficient of thermal expansion of 5.0×10⁻⁶. -6 K -1 ~5.2×10 -6 K -1 Within the specified range, see Table 3 for details.

[0074] The composition of the cullet used in this embodiment, by mass percentage, includes: SiO2 74%, Al2O3 6.0%, Na2O 6.0%, K2O 1.6%, total CaO and BaO 1.3%, B2O3 10.5%, and impurities 1.6%.

[0075] Table 2. Composition of batch materials (calculated as mass percentage)

[0076] Components raw material(%) Broken glass (%) Overflow material (%) 1 80 20 0 2 70 20 10 3 60 20 20 4 55 20 25 5 50 20 30

[0077] The raw materials, chopped glass and overflow material in Table 2 above are accurately weighed and mixed evenly with a mixing uniformity of over 95%. Then, the batch is melted using conventional methods in the art, the glass is formed, and finally the glass is inspected.

[0078] The raw materials consist of the following components by mass: 73.72 parts of quartz sand (content ≥ 99.3%), 5.96 parts of alumina, 21.18 parts of borax (B2O3 content ≥ 48%, Na2O2 content ≥ 3%), 1.26 parts of calcium carbonate, 2.60 parts of sodium carbonate (purity ≥ 99.2%), 0.65 parts of barium carbonate, 2.30 parts of potassium carbonate, and 0.3 parts of additives.

[0079] The aforementioned contents are all mass percentages, and the additives include cerium oxide and sodium chloride as clarifying agents.

[0080] The test results are shown in Tables 3-5:

[0081] Table 3. Performance comparison of borosilicate glass melted from batches with different compositions (content is by mass percentage).

[0082]

[0083] The data in Table 3 show that the density, linear thermal expansion coefficient, B2O3 content, and water resistance of the borosilicate glass melted from groups 1 to 5 with different compositions are not significantly different (the water resistance of the particles at 121℃ is the volume of 0.02 mol / L hydrochloric acid titrant consumed per 1 g of glass particles, in ml). The performance of groups 1 to 5 was further tested, and the results are shown in Table 4.

[0084] Table 4. Comparison of properties of borosilicate glass melted from batches with different compositions

[0085]

[0086] Based on the data in Tables 3 and 4, it can be seen that by adjusting the composition of the batch materials, groups 1 to 5 can maintain the performance of borosilicate glass, but the overall pass rate of the glass varies. When the proportion of broken glass is low, there are more defects such as stones and nodules in the glass, reducing its pass rate, such as in groups 1 or 2. When the proportion of broken glass in the batch material is 20% and the proportion of overflow material is 20-30%, the production pass rate is the highest, such as in groups 3 to 5, where the production pass rate reaches over 80%.

[0087] Subsequently, experiments were conducted, revealing that with a raw material ratio of 50-60%, a 20% chopped glass ratio, and a 20-30% overflow material ratio, further increasing the overflow material ratio further investigated the glass performance. After conventional preparation using the aforementioned batching components, a new group of borosilicate glasses with a higher overflow material ratio was obtained. The mechanical impact resistance of this group of glasses was tested. Structural analysis revealed that the brittleness of the glasses prepared in groups 1-5 of this disclosure met the requirements, and their mechanical impact resistance was good. However, when the overflow material ratio in the batching was increased (i.e., the new group of borosilicate glasses with a higher overflow material ratio), testing showed that while brittleness increased, mechanical impact resistance decreased, and this group of glasses did not meet the quality standards.

[0088] Table 5. Fluorescence composition analysis of borosilicate glasses melted from batches with different compositions (in mass percentages, %)

[0089]

[0090]

[0091] Further testing was conducted on the glass prepared in groups 1 to 5. As can be seen from Table 5, the composition analysis of borosilicate glass prepared by melting different proportions of batch materials showed that the main components of the glass did not fluctuate significantly.

[0092] In summary, the method of adding overflow material to the batch for glass preparation to replace part of the chopped glass can maintain the performance of borosilicate glass, while the main components of the prepared glass do not fluctuate much. Within the specific batch composition range disclosed in this invention, the overall qualification rate of the prepared glass is the highest, reaching over 80%, with excellent performance in various tests, meeting YBB standards, and the produced glass bottles have the best mechanical impact resistance.

[0093] The various embodiments of this disclosure have now been described in detail. While some specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A borosilicate glass batch material, characterized in that, The batching material includes raw materials, crushed glass, and overflow material, wherein, by mass percentage, the raw materials account for 50-60%, the crushed glass accounts for 20%, and the overflow material accounts for 20-30%. The overflow material composition, by mass percentage, includes: SiO2 74~75%, Al2O3 5.4~5.6%, Na2O 5.7~5.9%, K2O 1.5~1.6%, total CaO and BaO 1.2~1.3%, B2O3 9.8~10%, and impurities 0.8~2.2%. The amounts of borax, sodium carbonate, and quartz sand added to the raw materials are adjusted based on the mass of B2O3 in the added overflow material.

2. The batching material according to claim 1, characterized in that, The raw materials include: quartz sand, alumina, borax, calcium carbonate, sodium carbonate, potassium carbonate, and additives.

3. The batching material according to claim 1, characterized in that, The coefficient of thermal expansion of the shattered glass is 5.0 × 10⁻⁶. -6 K -1 ~5.2×10 -6 K -1 The diameter of the broken glass is 10.0mm to 35.0mm.

4. A method for reusing overflow material from borosilicate glass, characterized in that, The method includes the steps of determining the batch material and melting the batch material. The step of determining the batch material includes: In the glass preparation process, an overflow material is added to the raw materials and cullet. The proportion of the raw materials is adjusted based on the composition of the overflow material. By mass percentage, the raw materials account for 50-60%, the cullet accounts for 20%, and the overflow material accounts for 20-30%. The overflow material composition, by mass percentage, includes: SiO2 74~75%, Al2O3 5.4~5.6%, Na2O 5.7~5.9%, K2O 1.5~1.6%, total CaO and BaO 1.2~1.3%, B2O3 9.8~10%, and impurities 0.8~2.2%. The method for adjusting the components of the raw material is as follows: The mass percentage of each component in the overflow material and cullet is determined. Based on the mass percentage of each component in the overflow material, the mass percentage of each component in the raw materials is adjusted so that the components of the borosilicate glass prepared in the melting batching step are within the following ranges, expressed as mass percentages: SiO2 70~75%, Al2O3 5~7%, Na2O 5.8~6.2%, K2O 1.50~1.53%, total content of CaO and BaO 1~3%, B2O3 8~12%, and impurities 1.5~1.72%. The amounts of borax, sodium carbonate, and quartz sand added to the raw materials are adjusted based on the mass of B2O3 in the added overflow material.

5. The reuse method according to claim 4, characterized in that, The raw materials include: quartz sand, alumina, borax, calcium carbonate, sodium carbonate, potassium carbonate, and additives.

6. A method for preparing borosilicate glass, characterized in that, The method comprising any one of claims 4 to 5, wherein the preparation method comprises, in the following order: determining the batch material, weighing and mixing the batch material uniformly, melting the batch material, glass forming, and inspecting the glass.

7. The preparation method according to claim 6, characterized in that, The uniformity of the batch material in the mixing process is above 95%.

8. A borosilicate glass, characterized in that, The borosilicate glass is prepared by the preparation method described in claim 6 or 7.

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