A method for preparing high-quality emerald glass using quartz sand tailings

Abstract

The present invention relates to the field of glass preparation technology, specifically a method for preparing high-quality emerald glass using quartz sand tailings, comprising the following steps: step (1): collecting quartz tailings from different mining areas, crushing them into fine granular particles, and drying them for standby use; step (2): screening and particle gradient classification of the crushed and dried tailings in step (1); compared with the prior art, the method of the present invention pioneers experimental research on partially replacing high-purity silicon oxide with quartz sand tailings, develops and innovates new non-ferrous ion colorants, and successfully prepares high-quality emerald glass products by developing a reducing agent compatible with the tailings and through process technology innovation. The method effectively and highly value-addedly utilizes quartz sand tailings solid waste resources, improves the social and economic benefits of glass production enterprises, and promotes the sustainable development of the glass industry, which has extremely important practical significance.

Description

Technical Field

[0001] The present invention relates to the technical field of glass preparation, and in particular to a method for preparing high-quality emerald glass by utilizing quartz sand tailings. Background Art

[0002] High-quality colored glass has special properties and broad application prospects. The research and development of high-quality and special-performance colored glass is a new material and technology that is given priority development and key support. Among them, high-quality emerald glass and its products are high-tech, high-value-added products that are focused on development by the glass industry due to their special electromagnetic wave and light absorption properties, unique cleanliness and transparency, beautiful and noble colors, and environmental and health functions. They have long received high attention and popularity from the market and consumers.

[0003] The production of ordinary glass products uses quartz sand, calcite, soda ash and other materials as the main raw materials, of which quartz sand accounts for about 70%, and the purity of quartz sand should usually be greater than 99.9%.

[0004] To promote the efficient and high-value utilization of quartz sand tailings resources, develop high-performance, high-quality glass, and iterate and innovate advanced glass production and processing technologies, fundamentally addressing these pressing and severe challenges is a necessary and practical need. To this end, the present invention proposes a method for producing high-quality emerald glass from quartz sand tailings that can address these challenges. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a method for preparing high-quality emerald glass using quartz sand tailings. The application of this method will enable the tailings resources generated during the quartz sand mining process to be utilized in a high-value manner, which is beneficial to fundamentally solve the environmental pollution and harm caused by quartz sand tailings solid waste and promote the sustainable development of the glass industry.

[0006] The present invention provides a method for preparing high-quality emerald glass using quartz sand tailings, comprising the following steps:

[0007] Step (1): collecting quartz tailings from different mining areas, crushing them into fine granular particles and drying them for later use;

[0008] Step (2): screening and particle gradient classification of the tailings crushed and dried in step (1), wherein the particle gradient levels are a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size;

[0009] Step (3): using a certain amount of quartz sand tailings of any primary particle size obtained in step (2) as a raw material, adding appropriate amounts of corresponding raw materials such as sodium oxide, calcium oxide, silicon oxide, and boron oxide that can form glass after glass melting, as well as appropriate amounts of a colorant and a reducing agent according to the composition of oxides in the glass product;

[0010] Step (4): Stir, grind and mix the various glass raw materials in step (3), and then heat and melt them at high temperature to prepare emerald glass.

[0011] As a further optimization solution of the present invention, in step (1), the particle size of the crushed particles is ≤2 mm, the drying temperature is 120-150° C., and the drying time is 2-4 hours.

[0012] As a further optimization scheme of the present invention, in step (2), the particle sizes of the a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size are less than 0.1 mm, 0.1 mm to 0.25 mm, 0.25 mm to 0.5 mm, 0.5 mm to 0.63 mm, 0.63 mm to 0.85 mm, and 0.85 mm to 2 mm, respectively.

[0013] As a further optimization scheme of the present invention, in the step (3), the raw materials of sodium oxide, calcium oxide, silicon oxide and boron oxide that can form glass after glass melting are added in appropriate amounts according to the composition of the oxides in the glass product, which are 8-15% carbonic acid or sulfuric acid or sodium nitrate salt, 7-13% carbonic acid or sulfuric acid or calcium nitrate salt, 20-70% silicon oxide, 3-10% borax; 0.05-1.5% colorant, and 0.3-2.0% reducing agent.

[0014] As a further optimization scheme of the present invention, in the step (4), the high-temperature heating melting is the melting of the glass material under programmed heating conditions of 5-240°C for 2-4 hours, 240-1200°C for 12-20 hours, and 1200-1550°C for 5-8 hours.

[0015] For ease of description, the present invention provides a method for preparing high-quality emerald glass using quartz sand tailings, hereinafter referred to as the present method.

[0016] This method uses sodium carbonate, calcium carbonate, silicon oxide (high-purity quartz sand), and borax as basic raw materials. It carries out long-term research and development on the use of quartz sand tailings instead of silicon oxide raw materials, the types of colorants and reducing agents, the dosage of colorants and reducing agents, and the high-temperature melting process of glass, and successfully creates and prepares high-quality emerald glass.

[0017] Emerald is a special color that exudes a particularly noble temperament. It is often seen in high-end natural or synthetic emerald products. However, there are very few high-quality glassy emerald products on the market. The fundamental reason is that the raw materials used to make these products must have high purity. Traditional iron ion colorants have unstable coloring properties under high-temperature melting environments. They are affected by many complex factors, such as the oxidation and reduction ions in the various ingredients added to the raw material formula, the high and low temperature environments of the molten glass liquid, and the product annealing process. R&D is difficult and the process technology is still immature.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This method pioneered experimental research using quartz sand tailings as a partial replacement for high-purity silicon oxide, resulting in the development of a novel non-ferrous ion colorant. Furthermore, through the development of a compatible reducing agent and technological innovation, high-quality emerald glass products were successfully produced. This research is of vital practical significance for fundamentally addressing the environmental pollution and hazards caused by quartz sand tailings, effectively and efficiently utilizing this solid waste resource, improving the socioeconomic benefits of glass production enterprises, and promoting the sustainable development of the glass industry.

[0020] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the UV-visible spectrum analysis spectrum of emerald glass A prepared according to an embodiment of the present invention;

[0022] Figure 2 This is the UV-visible spectrum analysis spectrum of emerald glass B prepared in accordance with an embodiment of the present invention;

[0023] Figure 3 This is a photo of emerald glass A prepared according to an embodiment of the present invention;

[0024] Figure 4 This is a photo of emerald glass B prepared according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-4 , Example 1

[0027] A method for preparing high-quality emerald glass using quartz sand tailings comprises the following steps:

[0028] Step (1): collecting quartz tailings from Company A, crushing them into fine granular particles and drying them at 130° C. for 4 hours for later use;

[0029] Step (2): The quartz tailings crushed and dried in step (1) are sieved and graded into particle gradients, wherein the particle gradient grades are a-grade particle size, b-grade particle size, c-grade particle size, d-grade particle size, e-grade particle size, and f-grade particle size, and the particle sizes are less than 0.1 mm, 0.1-0.25 mm, 0.25-0.5 mm, 0.5-0.63 mm, 0.63 mm-0.85 mm, and 0.85-2 mm, respectively;

[0030] Step (3): first take 5% of quartz sand tailings with a particle size of 0.1 to 0.25 mm, and then weigh the required corresponding raw materials sodium carbonate, calcium sulfate, silicon oxide (high-purity quartz sand), and borax in order according to 12% Na2O, 10% CaO, 64.5% SiO2, and 7% B2O3, and then add 0.5% of a colorant and 1% of a reducing agent; wherein the colorant is prepared from 5 to 20% sodium chromate, 5 to 20% nickel oxide, 10 to 30% copper oxide, 10 to 30% praseodymium oxide, and 20 to 40% solid sodium silicate, and the reducing agent is prepared from 5 to 15% sodium thiosulfate, 15 to 25% sodium bicarbonate, 5 to 15% cerium oxide, 15 to 30% sulfur powder, and 15 to 30% carbon powder;

[0031] Step (4): Stir, grind and mix the various glass materials in step (3), and heat and melt them at room temperature to 240°C for 4 hours, 240 to 1200°C for 18 hours, and 1200 to 1550°C for 8 hours to prepare emerald glass A.

[0032] Example 2

[0033] A method for preparing high-quality emerald glass using quartz sand tailings comprises the following steps:

[0034] Step (1): collecting quartz tailings from a certain company, crushing them into fine granular particles and drying them at 150° C. for 2 hours for later use;

[0035] Step (2): The quartz tailings crushed and dried in step (1) are sieved and graded into particle gradients, wherein the particle gradient grades are a-grade particle size, b-grade particle size, c-grade particle size, d-grade particle size, e-grade particle size, and f-grade particle size, and the particle sizes are less than 0.1 mm, 0.1-0.25 mm, 0.25-0.5 mm, 0.5-0.63 mm, 0.63 mm-0.85 mm, and 0.85-2 mm, respectively;

[0036] Step (3): first take 10% of quartz sand tailings with a particle size of 0.63-0.85 mm, and then weigh the required corresponding raw materials of sodium sulfate, calcium carbonate, silicon oxide (high-purity quartz sand), borax in accordance with 12% Na2O, 10% CaO, 58% SiO2, and 8% B2O3, and then add 0.75% colorant and 1.25% reducing agent;

[0037] Step (4): Stir, grind and mix the various glass materials in step (3), and heat and melt them at room temperature to 240°C for 3 hours, 240 to 1200°C for 15 hours, and 1200 to 1500°C for 7 hours to prepare emerald glass B.

[0038] Example 3

[0039] A method for preparing high-quality emerald glass using quartz sand tailings comprises the following steps:

[0040] (1) Quartz tailings from a certain company were collected, crushed into fine granules and dried at 140°C for 3 hours for later use;

[0041] (2) sieving and particle gradient classification of the crushed and dried quartz tailings in step (1), wherein the particle gradient levels are a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size, and the particle sizes are less than 0.1 mm, 0.1-0.25 mm, 0.25-0.5 mm, 0.5-0.63 mm, 0.63 mm-0.85 mm, and 0.85-2 mm, respectively;

[0042] (3) First, take 20% of quartz sand tailings with a particle size of 0.5 to 0.63 mm, and then weigh the required raw materials sodium nitrate, calcium carbonate, silicon oxide (high-purity quartz sand), borax in order according to 8% Na2O, 12% CaO, 51.5% SiO2, and 6% B2O3, and then add 1.0% colorant and 1.5% reducing agent;

[0043] (4) The various glass materials in step (3) are stirred, ground and mixed, and then heated and melted at room temperature of 5°C to 240°C for 4 hours, 240°C to 1200°C for 17 hours, and 1200°C to 1500°C for 5 hours to prepare emerald glass C.

[0044] Example 4

[0045] A method for preparing high-quality emerald glass using quartz sand tailings comprises the following steps:

[0046] (1) Quartz tailings from a certain company were collected, crushed into fine granules and dried at 120°C for 4 hours for later use;

[0047] (2) sieving and particle gradient classification of the crushed and dried quartz tailings in step (1), wherein the particle gradient levels are a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size, and the particle sizes are less than 0.1 mm, 0.1-0.25 mm, 0.25-0.5 mm, 0.5-0.63 mm, 0.63 mm-0.85 mm, and 0.85-2 mm, respectively;

[0048] (3) First, take 30% of quartz sand tailings with a particle size of 0.25-0.5 mm, and then weigh the required raw materials of sodium carbonate, calcium carbonate, silicon oxide (high-purity quartz sand), borax in the proportion of 11% Na2O, 9% CaO, 42% SiO2, and 5% B2O3, and then add 1.2% colorant and 1.8% reducing agent;

[0049] (4) The various glass materials in step (3) are stirred, ground and mixed, and then heated and melted at room temperature of 15°C to 240°C for 3 hours, 240°C to 1200°C for 18 hours, and 1200°C to 1500°C for 6 hours to prepare emerald glass D.

[0050] Example 5

[0051] A method for preparing high-quality emerald glass using quartz sand tailings comprises the following steps:

[0052] (1) Quartz tailings from Company A were collected, crushed into fine granular particles, and dried at 150°C for 3 hours for later use;

[0053] (2) sieving and particle gradient classification of the crushed and dried quartz tailings in step (1), wherein the particle gradient levels are a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size, and the particle sizes are less than 0.1 mm, 0.1-0.25 mm, 0.25-0.5 mm, 0.5-0.63 mm, 0.63 mm-0.85 mm, and 0.85-2 mm, respectively;

[0054] (3) First, take 20% of quartz sand tailings with a particle size of 0.85-2 mm, and then weigh the required raw materials of sodium sulfate, calcium carbonate, silicon oxide (high-purity quartz sand), borax in the proportion of 8% Na2O, 13% CaO, 54% SiO2, and 3% B2O3, and then add 0.8% colorant and 1.2% reducing agent;

[0055] (4) The various glass materials in step (3) are stirred, ground and mixed, and then heated and melted at room temperature of 10°C to 240°C for 4 hours, 240°C to 1200°C for 16 hours, and 1200°C to 1500°C for 6 hours to prepare emerald glass E.

[0056] Example 6

[0057] A method for preparing high-quality emerald glass using quartz sand tailings comprises the following steps:

[0058] (1) Quartz tailings from Company B were collected, crushed into fine granules, and dried at 140°C for 2 hours for later use;

[0059] (2) sieving and particle gradient classification of the crushed and dried quartz tailings in step (1), wherein the particle gradient levels are a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size, and the particle sizes are less than 0.1 mm, 0.1-0.25 mm, 0.25-0.5 mm, 0.5-0.63 mm, 0.63 mm-0.85 mm, and 0.85-2 mm, respectively;

[0060] (3) First, take 25% of quartz sand tailings with a particle size of 0.25-0.5 mm, and then weigh the required raw materials of sodium carbonate, calcium nitrate, silicon oxide (high-purity quartz sand), borax in the proportion of 10% Na2O, 14% CaO, 41% SiO2, and 6.5% B2O3, and then add 1.5% colorant and 2.0% reducing agent;

[0061] (4) The various glass materials in step (3) are stirred, ground and mixed, and then heated and melted at room temperature to 240° C. for 4 hours, 240 to 1200° C. for 15 hours, and 1200 to 1550° C. for 7 hours to prepare emerald glass F.

[0062] Example 7

[0063] A method for preparing high-quality emerald glass using quartz sand tailings comprises the following steps:

[0064] (1) Quartz tailings from companies A, B, and C were collected, crushed into fine granules, and dried at 150°C for 3 hours for later use;

[0065] (2) sieving and particle gradient classification of the crushed and dried quartz tailings in step (1), wherein the particle gradient levels are a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size, and the particle sizes are less than 0.1 mm, 0.1-0.25 mm, 0.25-0.5 mm, 0.5-0.63 mm, 0.63 mm-0.85 mm, and 0.85-2 mm, respectively;

[0066] (3) Equal amounts of crushed and dried quartz tailings from the three companies A, B, and C in step (1) are mixed and sieved and classified in step (2). 30% of the quartz sand tailings with a particle size of 0.5 to 0.63 mm is first taken by weight percentage, and then the required corresponding raw materials of sodium carbonate, calcium carbonate, silicon oxide (high-purity quartz sand), and borax are weighed in order according to 13% Na2O, 8% CaO, 38% SiO2, and 8% B2O3, and 1.0% colorant and 2.0% reducing agent are added;

[0067] (4) The various glass materials in step (3) are stirred, ground and mixed, and then heated and melted at room temperature to 240°C for 3 hours, 240 to 1200°C for 16 hours, and 1200 to 1500°C for 8 hours to prepare emerald glass G.

[0068] The emerald glass A and emerald glass B prepared in Example 1 and Example 2 were analyzed using a UV-visible spectrometer. Figure 1-Figure 2 , and by Figure 3 and Figure 4 It can be seen that the emerald glass samples prepared by this method meet the market quality requirements for emerald glass. The present invention uses quartz sand tailings as raw materials and, through the research and development and innovation of high-quality emerald glass preparation technology, provides a new and effective path to solving the current technical bottlenecks of the glass industry and alleviating the difficulties of sustainable development in the industry, which has important theoretical and practical significance.

[0069] This method pioneered experimental research using quartz sand tailings as a partial replacement for high-purity silicon oxide, resulting in the development of a novel non-ferrous ion colorant. Furthermore, through the development of a compatible reducing agent and technological innovation, high-quality emerald glass products were successfully produced. This research is of vital practical significance for fundamentally addressing the environmental pollution and hazards caused by quartz sand tailings, effectively and efficiently utilizing this solid waste resource, improving the socioeconomic benefits of glass production enterprises, and promoting the sustainable development of the glass industry.

[0070] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing high-quality emerald glass using quartz sand tailings, characterized in that: The following steps are involved: Step (1): collecting quartz tailings from different mining areas, crushing them into fine granular particles and drying them for later use; Step (2): screening and particle gradient classification of the tailings crushed and dried in step (1), wherein the particle gradient levels are a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size; Step (3): using a certain amount of quartz sand tailings of any primary particle size obtained in step (2) as a raw material, adding appropriate amounts of corresponding raw materials such as sodium oxide, calcium oxide, silicon oxide, and boron oxide that can form glass after glass melting, as well as appropriate amounts of a colorant and a reducing agent according to the composition of oxides in the glass product; Step (4): stirring, grinding and mixing the various glass raw materials in step (3), and then melting them at high temperature to prepare emerald glass; In the step (4), the high-temperature heating and melting is performed by melting the glass material under programmed temperature rising conditions of 5-240°C for 2-4 hours, 240-1200°C for 12-20 hours, and 1200-1550°C for 5-8 hours; The colorant is prepared from 5-20% sodium chromate, 5-20% nickel oxide, 10-30% copper oxide, 10-30% praseodymium oxide, and 20-40% solid sodium carbonate by weight; the reducing agent is prepared from 5-15% sodium thiosulfate, 15-25% sodium bicarbonate, 5-15% cerium oxide, 15-30% sulfur powder, and 15-30% carbon powder; In the step (3), according to the composition of the oxides in the glass product, appropriate amounts of raw materials such as sodium oxide, calcium oxide, silicon oxide, and boron oxide that can form glass after glass melting are added, which are 8-15% sodium carbonate or sodium sulfate or sodium nitrate, 7-13% calcium carbonate or calcium sulfate or calcium nitrate, 20-70% silicon oxide, and 3-10% borax; 0.05-1.5% colorant, and 0.3-2.0% reducing agent.

2. The method for preparing high-quality emerald glass from quartz sand tailings according to claim 1, wherein: In the step (1), the crushed particles have a particle size of ≤2 mm, the drying temperature is 120-150° C., and the drying time is 2-4 hours.

3. The method for preparing high-quality emerald glass from quartz sand tailings according to claim 1, wherein: In the step (2), the particle sizes of the a-level particle size, b-level particle size, c-level particle size, d-level particle size, e-level particle size, and f-level particle size are respectively less than 0.1 mm, 0.1 mm to 0.25 mm, 0.25 mm to 0.5 mm, 0.5 mm to 0.63 mm, 0.63 mm to 0.85 mm, and 0.85 mm to 2 mm.

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