Apparatus and method for measuring the erosion resistance of electrically fused high zirconia bricks for substrate glass furnaces

Abstract

The present invention discloses an apparatus and method for measuring the erosion resistance of electrically fused high-zirconia bricks for substrate glass furnaces. The apparatus includes a crucible cover attached to the opening of the crucible, a positioning shaft installed at the center of the crucible cover, and a number of square holes evenly spaced around the periphery of the crucible cover, with fixing components attached to the square holes. The apparatus for measuring the erosion resistance of electrically fused high-zirconia bricks involves machining the electrically fused high-zirconia bricks into samples of predetermined dimensions, measuring their initial dimensions, and then fixing them to a platinum crucible. The platinum crucible is then filled with a substrate glass blend based on the product composition, and the samples are placed in a high-temperature furnace for simulating process temperature conditions and subsequently cooled with the furnace. The changes in the dimensions and depth of the samples before and after erosion can be measured, allowing for accurate calculation of the glass erosion resistance rate of the electrically fused high-zirconia bricks, providing an experimental basis for selecting electrically fused high-zirconia brick materials for production furnaces.

Description

[Technical Field]

[0001] The present invention relates to the field of performance testing of refractory materials for advanced substrate glass furnaces, and more particularly to an apparatus and method for measuring the erosion resistance of electrically fused high zirconia bricks for substrate glass furnaces. [Background technology]

[0002] Glass products are widely used in the display field, and the development of the display device industry is unthinkable without the support of the glass industry. Although other materials can replace glass in some applications, they still cannot replace the excellent performance of glass. From the traditional color television tube industry to the current flat panel display industry, glass plays an important role in display devices, serving as the frame and carrier for the entire device, as an optical component, and as the upper and lower substrates of flat panel display devices, requiring precise micro-semiconductor processing. To achieve high efficiency and long-life operation of next-generation, large-capacity substrate glass furnaces, electric fusion furnace high zirconia bricks have strong glass liquid corrosion resistance, which can meet the long-life operation needs of furnaces. Summary of the Invention [Problem to be solved by the invention]

[0003] In the glass substrate manufacturing process, glass compound materials must be fed stably and smoothly through a supply system into the inlet of a melting furnace, where they must be melted, refined, and homogenized to produce a homogeneous glass liquid suitable for the next process. The glass liquid melted in the melting furnace is alkali-free high aluminum boron silicate glass, and this glass product is mainly used as substrate glass for flat panel displays.

[0004] Electrically fused high-zirconia bricks are the mainstream material used for the pool walls and bottoms of gas-electric mixing furnaces for substrate glass. As the input rate and flow rate of high-generation substrate glass increase, corrosion of the pool walls and bottoms becomes more severe. Therefore, electrically fused high-zirconia bricks for furnaces cannot avoid corrosion from the high-temperature glass liquid and the various electrochemical environments within the furnace during the glass melting process, resulting in a shortened furnace lifespan. Therefore, studying the glass liquid corrosion resistance of electrically fused high-zirconia bricks for furnaces has significant application value for extending furnace lifespan and for selecting electrically fused high-zirconia brick materials and process design. [Means for solving the problem]

[0005] The present invention discloses an apparatus and method for measuring the erosion resistance of electrically fused high zirconia bricks for substrate glass furnaces, which enables accurate measurement of the erosion rate of glass liquid on electrically fused high zirconia bricks for furnaces during a glass melting process at high temperatures.

[0006] In order to achieve the above object, the present invention employs the following technical means.

[0007] The present invention discloses an apparatus for measuring the erosion resistance of electrically fused high zirconia bricks for use in a substrate glass furnace, the apparatus comprising: a crucible (3), a crucible cover, a positioning shaft (5), a square hole, and a fixing component, the crucible cover being attached to the opening of the crucible (3), the positioning shaft (5) being installed at the center of the crucible cover, a plurality of square holes being provided, the square holes being evenly spaced around the periphery of the crucible cover, and the fixing component being attached to the square hole.

[0008] Furthermore, the length of the rectangular hole is greater than 105 mm, and the width of the rectangular hole is greater than 24 mm.

[0009] Furthermore, the depth of the crucible (3) is greater than 12 mm, and the material of the crucible (3) is PtRh2O.

[0010] Furthermore, the angle between the radial directions of the crucible cover where each of the square holes is located is 90 degrees.

[0011] The present invention also discloses a method for measuring the erosion resistance of electrically fused high-zirconia bricks for use in substrate glass furnaces, the method comprising the steps of: processing the initial dimensions of an electrically fused high-zirconia brick sample to be measured using the above-mentioned device to obtain a processed electrically fused high-zirconia brick sample (2); adding a glass compound to a crucible (3), attaching a crucible cover to the opening of the crucible (3), placing the processed electrically fused high-zirconia brick sample (2) into the glass compound through the square hole, and fixing the processed electrically fused high-zirconia brick sample (2) using fixing parts; placing the entire device in a high-temperature furnace, maintaining it at a predetermined temperature, and then performing measurements to obtain changes in dimension and depth of the processed electrically fused high-zirconia brick sample (2); and calculating the glass erosion resistance rate of the processed electrically fused high-zirconia brick sample (2) based on the changes in dimension and depth.

[0012] Furthermore, the chemical material components of the electrofused high zirconia brick sample to be measured include ZrO2, SiO2 and impurities, the mass percentage of ZrO2 is 93% or more, the mass percentage of SiO2 is 4% or more, the mass percentage of impurities is greater than 0% and is 3% or less, and the sum of the mass percentages of ZrO2, SiO2 and impurities is 100%.

[0013] Furthermore, the glass compound material is composed of glass raw material and broken glass.

[0014] Furthermore, the mass ratio of the glass raw material to the broken glass is (75% to 76%):(24% to 25%).

[0015] Furthermore, the predetermined temperature is 1650°C.

[0016] Furthermore, the incubation time is 72 hours. [Effects of the Invention]

[0017] The apparatus and method for measuring the erosion resistance of electrically fused high zirconia bricks for use in substrate glass furnaces according to the present invention have the following beneficial effects.

[0018] The present invention provides an apparatus for measuring the corrosion resistance of electrically fused high-zirconia bricks for use in a substrate glass furnace. A crucible cover is attached to the opening of the crucible, and a positioning shaft is attached to the center of the crucible cover. The crucible cover has square holes evenly spaced around its periphery, and fixing parts are attached to the holes. The present invention rationally designs this measuring apparatus by utilizing existing laboratory parts and their dimensional layout, resulting in a simple structure and easy repeatable operation.

[0019] The present invention provides a method for measuring the erosion resistance of electrically fused high zirconia bricks for substrate glass furnaces, which calculates the glass erosion resistance rate of electrically fused high zirconia bricks by measuring the changes in size and depth of electrically fused high zirconia brick samples before and after erosion. The measurement results are scientifically reliable and have great application value in terms of extending the life of furnaces, selecting materials for electrically fused high zirconia bricks, and process design. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic diagram of an apparatus for measuring the erosion resistance of electrically fused high zirconia bricks for use in a substrate glass furnace according to the present invention. [Figure 2] 1 is a schematic diagram of an electrofused high zirconia brick before and after erosion. FIG. [Figure 3] 1 is a plan view of an apparatus for measuring the erosion resistance of electrically fused high zirconia bricks for use in a substrate glass furnace according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present application will now simply briefly describe some embodiments, and the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, it should be understood that the drawings and description are illustrative in nature and not restrictive.

[0022] In describing the present invention, references to orientations or positional relationships using terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., are based on the orientations or positions shown in the drawings and are intended solely to facilitate and simplify the description of the present invention. They do not suggest or imply that the subject devices or elements must be arranged or operated in a particular orientation or configuration, and should not be construed as a limitation of the present invention.

[0023] In the present invention, unless otherwise clearly specified or limited, the terms "attached," "connected," "coupled," "fixed," etc. should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integrated connection. They may also refer to a mechanical connection, an electrical connection, or a communication connection. They may refer to a direct connection, an indirect connection via an intermediate medium, a communication between two elements, or an interactive relationship between two elements. The specific meanings of these terms will be understood by those skilled in the art depending on the specific circumstances.

[0024] The present invention will be described in more detail below with reference to the drawings.

[0025] As shown in Figures 1 and 3, the apparatus for measuring the erosion resistance of electrically fused high zirconia bricks for substrate glass furnaces according to the present invention includes a crucible 3, a crucible cover, a positioning shaft 5, a square hole, and a fixing part. The crucible 3 is fitted with a crucible cover, and the positioning shaft 5 is installed at the center of the crucible cover, and the positioning shaft 5 serves as a reference for the positioning of the square hole.

[0026] Specifically, the square holes are evenly arranged around the positioning shaft 5 along the circumferential direction of the crucible cover, and there are four square holes. The angle between the radial directions of each square hole is 90 degrees, which allows the four processed electrofused high zirconia brick samples 2 to be rationally arranged around the positioning shaft.

[0027] Specifically, a fixing part is attached to each square hole, and is used to fix the processed electrofused high zirconia brick sample 2.

[0028] Specifically, the length of each square hole is 105 mm or more, the width is 24 mm or more, and the depth of the crucible 3 is 12 mm or more, which is used to satisfy the size of the processed electrofused high zirconia brick sample 2 (105 mm × 24 mm × 12 mm).

[0029] Specifically, a platinum crucible made of PtRh2O is used as the material for the crucible 3, which can ensure high temperature resistance and stability during the experiment.

[0030] The method for measuring the erosion resistance of an electrically fused high zirconia brick for a substrate glass furnace according to the present invention comprises the following steps.

[0031] First, the electrically fused high zirconia brick sample to be measured is processed to obtain processed sample 2 having a size of 105 mm x 24 mm x 12 mm.

[0032] Next, the glass compound material 4 is placed in the crucible, the crucible cover is attached, and the processed electrically fused high zirconia brick sample 2 is placed in the glass compound material 4 through the square hole and fixed with a fixing part. The compounding ratio of the glass compound material 4 is glass raw material: broken glass = (75% to 76%): (24% to 25%). In this example, the glass compound material has a ratio of glass raw material: broken glass of 76%:24%.

[0033] Finally, the measurement device, which had been prepared as described above, was placed in a high-temperature furnace and held at 1650°C for 72 hours. After that, it was cooled in the furnace, and the change in depth of the processed electrically fused high zirconia brick sample 2 before and after erosion was measured, and the glass erosion resistance rate of the electrically fused high zirconia brick was calculated.

[0034] FIG. 2 is a comparative diagram of a processed electrofused high zirconia brick sample 2 according to the present invention before and after erosion, showing that a portion of the glass formulation 4 at the bottom has been eroded.

[0035] Table 1 shows the erosion rates of the electrofused high zirconia brick samples. [Table 1]

[0036] The compounding ratio of the glass compounding material 4 used in the experiment of the present invention and the experimental temperature are matched with those of the production line, and the change in the sample dimensions of the processed electrically fused high zirconia brick before and after erosion is measured in depth, as shown in Table 1, so that the glass erosion resistance rate of the electrically fused high zirconia brick can be accurately calculated.

[0037] The above are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention. Those skilled in the art may make simple modifications and substitutions to the technical solutions of the present invention without departing from the spirit and principle of the present invention, and these modifications and substitutions will fall within the scope of protection covered by the claims of the present invention. [Explanation of symbols]

[0038] 1 High-temperature furnace 2. Processed electrofused high zirconia brick sample 3 Crucible 4. Glass compound raw materials 5 Positioning shaft

Claims

1. The crucible (3), the crucible cover, the positioning shaft (5), the square hole, and the fixing part, The crucible cover is attached to the opening of the crucible (3), and the positioning shaft (5) is installed at the center of the crucible cover; The device for measuring the erosion resistance of electrically fused high zirconia bricks for substrate glass furnaces has a plurality of square holes, the square holes are uniformly arranged in the circumferential direction of the crucible cover, and the fixing parts are attached to the square holes.

2. 2. The apparatus for measuring the erosion resistance of electrically fused high zirconia bricks for substrate glass furnaces according to claim 1, wherein the length of the rectangular hole is greater than 105 mm and the width of the rectangular hole is greater than 24 mm.

3. The depth of the crucible (3) is greater than 12 mm, and the material of the crucible (3) is PtRh. ２ 2. The apparatus for measuring the erosion resistance of an electrically fused high zirconia brick for a substrate glass furnace according to claim 1, wherein the erosion resistance is 0.

4. 2. The apparatus for measuring the erosion resistance of electrically fused high zirconia bricks for use in a substrate glass furnace according to claim 1, wherein the angle between the radial directions of the crucible cover at which each of the square holes is located is 90 degrees.

5. A method for measuring the corrosion resistance of an electrically fused high zirconia brick for a substrate glass furnace, comprising the steps of: A step of processing the initial dimensions of an electrofused high zirconia brick sample to be measured to obtain a processed electrofused high zirconia brick sample (2); After adding the glass compound material to the crucible (3), attach a crucible cover to the opening of the crucible (3), put the processed electrically fused high zirconia brick sample (2) into the glass compound material through the square hole, and use a fixing part to fix the processed electrically fused high zirconia brick sample (2); The whole device is placed in a high-temperature furnace, and after keeping the temperature at a predetermined temperature, measurements are taken to obtain the dimensional change in the depth of the electrofused high zirconia brick sample (2) after the processing; and calculating the glass erosion resistance rate of the processed electrically fused high zirconia brick sample (2) based on the dimensional depth change.

6. The chemical material composition of the electrofused high zirconia brick sample to be measured is ZrO ２ , SiO ２ and impurities, The ZrO ２ The mass percentage of SiO is 93% or more, ２ The mass percentage of the impurities is greater than 0% and the mass percentage of the impurities is 3% or less; The ZrO ２ , the SiO ２ 6. The method for measuring the corrosion resistance of an electrically fused high zirconia brick for a substrate glass furnace according to claim 5, wherein the sum of the mass percentages of the impurities is 100%.

7. The method for measuring the corrosion resistance of an electrically fused high zirconia brick for a substrate glass furnace according to claim 5, wherein the glass blending material is composed of glass raw material and broken glass.

8. The method for measuring the erosion resistance of an electrically fused high zirconia brick for a substrate glass furnace according to claim 7, wherein the mass ratio of the glass raw material to the broken glass is (75% to 76%):(24% to 25%).

9. 2. The method for measuring the corrosion resistance of an electrically fused high zirconia brick for a substrate glass furnace according to claim 1, wherein the predetermined temperature is 1650°C.

10. 2. The method for measuring the corrosion resistance of an electrically fused high zirconia brick for a substrate glass furnace according to claim 1, wherein the heat retention time is 72 hours.

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