A glass liquid stirring rod and stirring structure

Abstract

The utility model discloses a kind of stirring rod and stirring structure for glass liquid, main part adopts zirconium dispersed platinum rhodium alloy, and dense protective layer is arranged on the surface of main part, main part is separated from glass liquid by protective layer, avoid the rhodium compound colored formed in rhodium element in main part under high temperature and dissolve into glass liquid, to cause glass to be scrapped due to dyeing;Zirconium dispersed platinum is selected to form protective layer outside main part, not only will not cause obvious influence to the overall performance of stirring rod, and zirconium dispersed platinum and zirconium dispersed platinum rhodium alloy are platinum-based material, thermal expansion coefficient is close, interface is well combined, and it will not easily crack or peel due to thermal stress, it is favorable to ensure the stability of the overall structure of stirring rod;The utility model can effectively solve the problem that existing stirring rod is prone to cause glass dyeing, it is favorable to reduce production difficulty, improve production quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass stirring devices in chemistry, specifically relating to a stirring rod and stirring structure for molten glass. Background Technology

[0002] In the glass manufacturing industry, platinum is widely used in equipment that comes into direct contact with molten glass due to its extremely high melting point, excellent chemical inertness, and good high-temperature stability. Examples include conveying channels for transporting molten glass and stirring structures for molten glass. Early stirring rods for molten glass were mostly made of pure platinum. Although its melting point is much higher than the temperature of molten glass and it is corrosion-resistant, pure platinum has limited strength and creep resistance at high temperatures. To address the insufficient strength of pure platinum stirring rods, zirconium-dispersed platinum was developed to manufacture stirring rods. This involves dispersing zirconium oxide particles within a pure platinum matrix to improve strength and creep resistance at high temperatures. Currently, to cope with even higher operating temperatures and more demanding conditions, rhodium has been introduced into the dispersion strengthening process. This involves applying zirconium dispersion strengthening to the platinum-rhodium matrix. Platinum-rhodium alloys themselves have a higher melting point and strength than pure platinum. The zirconium-dispersed platinum-rhodium alloy obtained through zirconium dispersion strengthening exhibits superior performance compared to zirconium-dispersed platinum.

[0003] Although platinum and rhodium are both precious metals, and platinum-rhodium alloys have strong chemical inertness, in the ultra-high temperature melting process of some special glasses containing fluorine or alkali, rhodium may form colored rhodium compounds (such as Rh²⁺ and Rh³⁺ ions) and dissolve into the glass melt, causing the glass melt to be stained pink, purple, or yellow and thus scrapped. Therefore, for the manufacture of this part of special glass, zirconium-dispersed platinum is still used as the stirring rod. However, since the performance of zirconium-dispersed platinum is much weaker than that of zirconium-dispersed platinum-rhodium alloys, it not only leads to a decrease in the high-temperature stability of the stirring rod, but also requires an increase in the amount of precious metals and a larger structural size to ensure the mechanical properties of the stirring rod, making it difficult to meet the application requirements well. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a stirring rod and stirring structure for molten glass, to solve the technical problem that the existing stirring rods are prone to causing glass staining, and to achieve the effect of avoiding the stirring rod from contaminating the molten glass and improving production quality.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A stirring rod for molten glass includes a body and a protective layer. The body is made of zirconium-dispersed platinum-rhodium alloy, and the protective layer is disposed on the surface of the body. The material of the protective layer is zirconium-dispersed platinum.

[0006] Furthermore, the thickness of the protective layer is 0.2 mm to 2 mm.

[0007] Furthermore, the lower end of the main body is connected to a stirring blade, which is covered by a protective layer. The stirring blade is made of zirconium-dispersed platinum-rhodium alloy.

[0008] Furthermore, the protective layer on the main body extends upward from the stirring blade, with an extension distance of at least 30 mm.

[0009] Furthermore, the main body is a hollow structure with closed ends.

[0010] Furthermore, the inner diameter of the main body is 36mm to 42mm, and the outer diameter is 48mm to 56mm.

[0011] Furthermore, the stirring blade includes at least two blades, each blade is circumferentially distributed and connected to the main body, and the blades are plate-shaped and arranged along the axial direction of the main body.

[0012] Furthermore, the stirring blade includes at least two blades, each blade is circumferentially distributed and connected to the main body, and the blade is a U-shaped tubular component with both ends connected to the main body.

[0013] Furthermore, the stirring blade includes at least two blades, each blade is circumferentially distributed and connected to the main body, the blades are obliquely arranged and have a spiral twisted surface.

[0014] This utility model also includes a stirring structure for molten glass, the stirring structure including a stirring tank, a driving component and a stirring rod for molten glass as described above, the lower end of the stirring rod extending into the stirring tank and the upper end connected to the driving component, the driving component being used to drive the stirring rod to rotate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The glass molten stirring rod of this utility model is made of zirconium-dispersed platinum-rhodium alloy, and a dense protective layer is set on the surface of the main body. The protective layer separates the main body from the glass molten glass, preventing the rhodium element in the main body from forming colored rhodium compounds at high temperature and dissolving into the glass molten glass, thereby causing the glass to be scrapped due to staining. It can effectively solve the problem that existing stirring rods are prone to causing glass staining, which is conducive to reducing production difficulty and improving production quality.

[0016] 2. The glass melt stirring rod of this utility model, based on the main body of zirconium-dispersed platinum-rhodium alloy, uses zirconium-dispersed platinum to form a protective layer on the outside of the main body. This not only does not significantly affect the overall performance of the stirring rod, but also, since both zirconium-dispersed platinum and zirconium-dispersed platinum-rhodium alloy are platinum-based materials with similar coefficients of thermal expansion and good interfacial bonding, they will not easily crack or peel off due to thermal stress, which helps to ensure the stability of the overall structure of the stirring rod.

[0017] 3. The glass molten stirring rod of this utility model has a protective layer that mainly covers the lower end of the main body and the stirring blades that are in contact with the glass molten material. This not only helps to save precious metals and reduce production costs, but also, since the upper end of the main body needs to be used to achieve rotation or connect with other components, the absence of a protective layer at the upper end of the main body prevents the rotation and connection from being affected by cracking or peeling of the protective layer. This improves the practicality of the glass molten stirring rod. Attached Figure Description

[0018] Figure 1 This is a perspective view of the stirring rod for molten glass described in Example 1; Figure 2 This is a schematic diagram of the stirring rod and stirring structure for molten glass described in Example 1; Figure 3 This is a perspective view of the stirring rod for molten glass described in Example 2; Figure 4 This is a schematic diagram of the stirring rod and stirring structure for molten glass described in Example 2; The components include: 1. Main body; 2. Liquid glass; 3. Stirring blade; 4. Protective layer; 5. Stirring tank. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] Example 1: Please refer to Figure 1 and Figure 2 A stirring rod for molten glass includes a main body 1 and a protective layer 4. The main body 1 is made of a zirconium-dispersed platinum-rhodium alloy, and the protective layer 4 is disposed on the surface of the main body 1. The material of the protective layer 4 is zirconium-dispersed platinum. In practice, the protective layer 4 can be formed by coating the surface of the main body 1 with zirconium-dispersed platinum through processes such as powder metallurgy or welding. In this embodiment, the platinum content in the zirconium-dispersed platinum-rhodium alloy is 80%-95%, and the platinum content in the zirconium-dispersed platinum is greater than 99%.

[0021] The glass stirring rod of this invention has a main body 1 made of zirconium-dispersed platinum-rhodium alloy. Compared with stirring rods made of zirconium-dispersed platinum, this material has higher strength and creep resistance at high temperatures under the same size specifications, and can cope with higher operating temperatures and more demanding working conditions. Under the same usage requirements, it can save on the amount of precious metals used and reduce production costs. A dense protective layer 4 is set on the surface of the main body 1. During stirring, the protective layer 4 separates the main body 1 from the glass liquid 2, preventing the rhodium element in the main body 1 from forming colored rhodium compounds at high temperatures and dissolving into the glass liquid 2, thus preventing the glass from being scrapped due to staining. The protective layer 4 is made of zirconium-dispersed platinum, which is not only a material used in the manufacture of glass... Existing materials for glass stirring rods also exhibit good performance at high temperatures, without significantly affecting the overall performance of the stirring rod. Furthermore, zirconium-dispersed platinum and zirconium-dispersed platinum-rhodium alloys are both platinum-based materials with similar coefficients of thermal expansion and good interfacial bonding, preventing easy cracking or peeling due to thermal stress, thus ensuring the stability of the overall structure of the stirring rod. In addition, for situations where the stirring rod also serves as a heating electrode, the protective layer 4 of zirconium-dispersed platinum does not significantly affect the conductivity of the stirring rod, thereby improving the practicality of the glass stirring rod. Therefore, this invention can effectively solve the problem of glass staining caused by existing stirring rods, which helps to reduce production difficulty and improve production quality.

[0022] Please see Figure 2 T1 shows the thickness of the protective layer 4. In this embodiment, the thickness of the protective layer 4 is 0.2 mm to 2 mm. In this way, while ensuring the isolation effect, not only can the amount of precious metals be reduced and the production cost reduced, but the impact of the protective layer 4 on the overall performance of the stirring rod can also be reduced. If the thickness of the protective layer 4 is too large, it will not only increase the amount of precious metals and the cost, but also lead to a decrease in the adhesion of the protective layer 4 and easy cracking.

[0023] Please see Figure 1 and Figure 2 The lower end of the main body 1 is connected to a stirring blade 3, and a protective layer 4 covers the stirring blade 3. The stirring blade 3 is made of zirconium-dispersed platinum-rhodium alloy, and the platinum content in the zirconium-dispersed platinum-rhodium alloy is 80%-95%. This helps to save precious metal usage and reduce production costs. In this embodiment, the stirring blade 3 includes two blades, which are symmetrically connected on both radial sides of the main body 1. The blades are plate-shaped and arranged along the axial direction of the main body 1.

[0024] In one embodiment, to ensure the stirring blade 3 is completely submerged in the molten glass 2 and to fully utilize the stirring effect, the main body 1 may also partially come into direct contact with the molten glass 2. Therefore, please refer to [the relevant documentation / reference]. Figure 2This invention further specifies that the main body 1 also has a protective layer 4, which extends from the stirring blade 3 to the upper end, with an extension distance H1 of at least 30mm. This ensures that, while meeting the stirring requirements of the molten glass 2, the zirconium-dispersed platinum-rhodium alloy does not directly contact the molten glass 2, avoiding glass staining problems and saving precious metal usage, thus reducing production costs. Additionally, since the upper end of the main body 1 needs to be used for rotation or connection with other components, the absence of a protective layer 4 at the upper end prevents issues such as cracking or peeling of the protective layer 4 that could affect rotation and connection, thereby improving the practicality of the stirring rod for molten glass.

[0025] Please see Figure 2 The main body 1 is a hollow structure with closed ends; this not only helps to save precious metals and reduce production costs, but also reduces the weight of the stirring rod for the glass liquid and reduces the energy consumption of stirring the glass liquid 2.

[0026] In this embodiment, the inner diameter of the main body 1 is designed to be 36mm to 42mm and the outer diameter is 48mm to 56mm. In this way, while saving precious metals and reducing the weight, the wall thickness is controlled by limiting the inner and outer diameters to ensure that the overall structural strength of the stirring rod meets the requirements for stirring the glass liquid 2.

[0027] To more intuitively demonstrate the reduction in precious metal usage that this invention can achieve, examples and comparative analysis are provided below: In a glass production line that produces easily crystallized glass, the stirring temperature needs to reach 1600℃ and the flow rate is 10T / D. The glass contains certain raw materials that are colored with rhodium, which prevents it from coming into contact with rhodium. 1) If the main body 1 is directly made of zirconium-dispersed platinum-rhodium 10 (the matrix is ​​a platinum alloy containing 10% rhodium), then with a total length of 1000mm and an inner diameter d1=40mm, strength calculations show that the outer diameter of the main body 1 needs to reach D1=50mm. Based on the density of zirconium-dispersed platinum-rhodium 10, ρ1=0.02g / mm². 3 The weight of the main body 1 can be calculated as Q1 = 14130g, but this will cause the glass melt to stain. 2) If the main body 1 is made of zirconium-dispersed platinum, since the allowable torsional shear stress of zirconium-dispersed platinum is only 1 / 2 that of zirconium-dispersed platinum-rhodium 10, assuming the total length and inner diameter d2 of the main body 1 remain unchanged, the strength calculation shows that the outer diameter of the main body 1 needs to reach D2 = 57.7 mm. Based on the density of zirconium-dispersed platinum ρ2 = 0.021 g / mm², this is sufficient. 3 The weight of the main body can be calculated as Q2 = 28507g. The total weight increase is approximately 28507 / 14130 = 2 times, which can solve the problem of glass melt staining. 3) If the stirring rod described in this utility model is used, since the substrate of the main body 1 is still zirconium-dispersed platinum-rhodium 10, the strength will not be affected. After the substrate of the main body 1 is coated with zirconium-dispersed platinum, the glass melt and rhodium do not come into contact, so the rhodium will not react with the components in the glass and cause the glass to change color. The thickness of the protective layer 4 is 0.2 mm to 2 mm, and it is not a whole coating. The overall weight increase will not exceed 10%, and the problem of glass melt staining can be solved. 4) At 1600℃, the lifespan of a stirring rod using zirconium-dispersed platinum-rhodium is about 2 years, and the lifespan of a stirring rod using zirconium-dispersed platinum is about 3 months. The stirring rod scheme of this utility model using zirconium-dispersed platinum coated with zirconium-dispersed platinum-rhodium also has a lifespan of about 2 years. Therefore, the present invention adopts a stirring rod scheme with zirconium-dispersed platinum coated with zirconium-dispersed platinum-rhodium. For the production of glass that cannot contain rhodium colorants, compared with the scheme using zirconium-dispersed platinum, it can greatly save the amount of precious metals used, and the life of the stirring rod is significantly longer than that of the scheme using only zirconium-dispersed platinum.

[0028] Example 2: Please refer to Figure 3 and Figure 4 The difference from Embodiment 1 is that the stirring blade 3 includes two blades, which are symmetrically connected on both sides of the main body 1. The blades are U-shaped tubular parts and connected to the main body 1 at both ends.

[0029] Example 3: The difference from Example 1 is that the stirring blade includes three blades, which are connected to the main body 1 and are evenly distributed around the circumference. The blades are obliquely arranged and have a spiral twisted surface.

[0030] Example 4: The difference from Example 1 is that the stirring blade includes a blade that is connected to the body 1 and extends spirally along the axial direction of the body 1.

[0031] Please see Figure 2 and Figure 4 This utility model also includes a stirring structure for molten glass. The stirring structure includes a stirring tank 5 and a driving component, and adopts the stirring rod for molten glass described in any of the previous embodiments. The lower end of the stirring rod extends into the stirring tank 5, and the upper end is connected to the driving component, which drives the stirring rod to rotate. In this way, the stirring rod adopts a structure of zirconium-dispersed platinum-coated zirconium-dispersed platinum-rhodium alloy. The zirconium-dispersed platinum separates the zirconium-dispersed platinum-rhodium alloy from the molten glass 2, preventing the formation of colored rhodium compounds at high temperatures and their dissolution into the molten glass 2, which would cause the glass to be scrapped due to staining. Both zirconium-dispersed platinum and zirconium-dispersed platinum-rhodium alloy are platinum-based materials with similar coefficients of thermal expansion and good interfacial bonding, and will not easily crack or peel off due to thermal stress. This can effectively solve the problem that existing stirring rods are prone to causing glass staining, which is conducive to reducing production difficulty and improving production quality.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A stirring rod for molten glass, characterized in that: It consists of a main body and a protective layer. The main body is made of zirconium-dispersed platinum-rhodium alloy, and the protective layer is set on the surface of the main body. The material of the protective layer is zirconium-dispersed platinum.

2. The stirring rod for molten glass according to claim 1, characterized in that: The thickness of the protective layer is 0.2 mm to 2 mm.

3. The stirring rod for molten glass according to claim 1, characterized in that: The lower end of the main body is connected to a stirring blade, which is covered by a protective layer. The stirring blade is made of zirconium-dispersed platinum-rhodium alloy.

4. The stirring rod for molten glass according to claim 3, characterized in that: The protective layer on the main body extends from the stirring blade to the upper end, with an extension distance of at least 30mm.

5. The stirring rod for molten glass according to claim 3, characterized in that: The main body is a hollow structure with closed ends.

6. The stirring rod for molten glass according to claim 5, characterized in that: The inner diameter of the main body is 36mm to 42mm, and the outer diameter is 48mm to 56mm.

7. The stirring rod for molten glass according to claim 3, characterized in that: The stirring blade includes at least two blades, each blade is circumferentially distributed and connected to the main body, and the blades are plate-shaped and arranged along the axial direction of the main body.

8. The stirring rod for molten glass according to claim 3, characterized in that: The stirring blade includes at least two blades, each blade is circumferentially distributed and connected to the main body, and the blade is a U-shaped tubular component with both ends connected to the main body.

9. The stirring rod for molten glass according to claim 3, characterized in that: The stirring blade includes at least two blades, each blade is circumferentially distributed and connected to the main body, the blades are obliquely arranged and have a spiral twisted surface.

10. A stirring structure for molten glass, characterized in that: It includes a stirring tank, a driving component, and a stirring rod for molten glass as described in any one of claims 1-9, wherein the lower end of the stirring rod extends into the stirring tank and the upper end is connected to the driving component, and the driving component is used to drive the stirring rod to rotate.

Images