An ultra-thin glass electrically assisted melting furnace baking expansion adjustment system and method

Abstract

The application discloses a kind of expansion adjustment system and method suitable for ultra-thin glass electrically assisted melting kiln baking kiln, belong to the expansion control process field in the heating process of kiln, according to the different kinds of refractory material of different use parts of melting furnace, the targeted expansion adjustment strategy is implemented, first, the expected release amount and thermal expansion coefficient of the refractory material of the melting furnace are obtained, then the melting furnace is installed by the expected release amount, so that the melting furnace has certain reserved gap, finally, in different stages of baking kiln, combined with thermal expansion coefficient and melting furnace part, the expansion size of refractory material is finely controlled by adjusting the compression and release of refractory material, so that the expansion size reaches the process technical requirements;Compared with the traditional manual measurement method, the principle of the method is simple, the operability is strong, the implementation is convenient, and has the advantages of systematicness, coherence, authenticity, convenience, etc.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of expansion control in the heating process of a kiln, in particular to the field of expansion control in the early heating and baking process of an overflow method large-drawing ultra-thin glass electrically-assisted melting kiln, and specifically relates to an ultra-thin glass electrically-assisted melting kiln baking expansion adjustment system and method. BACKGROUND

[0002] A glass melting furnace (kiln) is the core of a glass manufacturing enterprise, and a reasonable structure, excellent masonry quality, and successful baking of the glass melting furnace are of great significance to both prolonging the service life of the melting furnace and improving the yield and quality of glass products.

[0003] The melting furnace of the liquid crystal substrate glass manufacturing industry is the core part of the entire manufacturing process, and usually needs to be masonry repaired in a cold state every 4-6 years due to the aging and erosion of the refractory material of the melting furnace body. When a new glass melting furnace is put into use, it needs to be baked and heated according to a certain temperature gradient to prevent rapid heating from causing the refractory material of the melting furnace body to expand and crack, affecting the structural safety of the melting furnace.

[0004] Now, the baking and heating of the melting furnace entirely relies on manual measurement of the expansion amount of the refractory material of the melting furnace body at regular intervals, and the refractory material is controlled only by feeling and experience, which cannot achieve fine control of the expansion size of the refractory material and cannot fully meet the process technical requirements. SUMMARY

[0005] To solve the above technical problems, the present application provides an ultra-thin glass electrically-assisted melting kiln baking expansion adjustment system and method, which can fine control the expansion size of the refractory material and make the expansion size fully meet the process technical requirements.

[0006] To achieve the above purpose, the technical scheme of the present application is as follows:

[0007] An ultra-thin glass electrically-assisted melting kiln baking expansion adjustment method, comprising the following steps:

[0008] S1: obtaining the predicted release amount and the thermal expansion coefficient of the refractory material constituting the melting furnace;

[0009] S2: installing the melting furnace according to the predicted release amount;

[0010] S3: baking the melting furnace, and combining the thermal expansion coefficient and the melting furnace part to compress and release the refractory material at different stages of the baking.

[0011] Further, in S1, before obtaining the predicted release amount and the thermal expansion coefficient, the refractory material is classified, and the corresponding predicted release amount and thermal expansion coefficient are obtained according to the classification.

[0012] Further, the refractory material is classified into sintered, electro-fused, press-molded and casted.

[0013] Further, the refractory material is an inorganic non-metallic material with a refractory temperature not less than 1580℃.

[0014] Further, the specific steps of S2 are as follows:

[0015] According to the reserved gap of the melting furnace installation according to the expected release amount, the melting furnace is installed according to the reserved gap.

[0016] Further, in S3, the different stages of the baking furnace include a low-temperature heating stage of the melting furnace, a medium-temperature heating stage of the melting furnace, a high-temperature heating stage of the melting furnace, and an end heating stage of the melting furnace.

[0017] Further, in combination with the thermal expansion coefficient and the melting furnace part, the refractory material is adjusted by external stress as follows:

[0018] In the low-temperature heating stage of the melting furnace, the refractory material is adjusted by compression;

[0019] In the medium-temperature heating stage of the melting furnace, the refractory material is adjusted by slow and quantitative release;

[0020] In the high-temperature heating stage of the melting furnace, the refractory material is adjusted by release, and the release strength is greater than that in the medium-temperature heating stage of the melting furnace;

[0021] In the end heating stage of the melting furnace, the refractory material is adjusted by compression.

[0022] Further, when the melting furnace is heated to above 1500℃ and enters the end heating stage of the melting furnace.

[0023] Further, in S3, the melting furnace part includes a melting furnace top structure, a melting furnace side breast wall structure, a melting furnace side pool wall structure, a melting furnace conductive structure, and a melting furnace bottom structure.

[0024] A kind of be suitable for ultra-thin glass electric melting furnace baking furnace expansion adjustment system for realizing the steps of the above-mentioned kind of method suitable for ultra-thin glass electric melting furnace baking furnace expansion adjustment, including:

[0025] The acquisition module is used to obtain the expected release amount and the thermal expansion coefficient of the refractory material for constructing the melting furnace;

[0026] The installation module is used to install the melting furnace according to the expected release amount;

[0027] The adjustment module is used to bake the melting furnace, in combination with the thermal expansion coefficient and the melting furnace part, to compress and release the refractory material in different stages of baking.

[0028] Compared with the prior art, the present application has the beneficial effects as follows:

[0029] The present application provides a kind of method for expansion adjustment suitable for ultra-thin glass electric melting furnace baking furnace, according to the different types of refractory materials in different parts of the melting furnace, the present application carries out targeted expansion adjustment strategy, first, the expected release amount and the thermal expansion coefficient of the refractory material constituting the melting furnace are obtained, then the melting furnace is installed by the expected release amount, so that the melting furnace has a certain reserved gap, finally, in different stages of baking furnace, combined with the thermal expansion coefficient and the part of the melting furnace, the refractory material is adjusted by compression and release, so as to realize the fine control of the expansion size of the refractory material, and make it reach the process technical requirements; Compared with the traditional manual measurement method, the present application has the advantages of simple principle, strong operability, convenient implementation, systematicness, continuity, authenticity, convenience, etc.

[0030] Preferably, before obtaining the expected release amount and the thermal expansion coefficient, the present application classifies the refractory material, and obtains the corresponding expected release amount and thermal expansion coefficient according to the classification; By classifying the refractory material, the expansion adjustment method is set according to the classification, rather than considering the overall adjustment as a whole; And according to the different expansion stress released by each type of refractory material, when formulating the process method, whether the expansion stress between the refractory materials can be borrowed or released together is fully considered, and some refractory materials need to be considered in advance in the process adjustment, so that the material expands according to the expected release amount, or the expansion reserved gap is considered in advance in the installation process, so that the control of the expansion size of the refractory material is more fine.

[0031] Preferably, the categories of refractory materials include sintering, electric melting, compression molding and casting, and the refractory material is inorganic non-metallic material not less than 1580 DEG C, so that the refractory material is finely classified to formulate different control strategies for different refractory materials.

[0032] Preferably, different parts of the melting furnace need to reserve gaps in advance during the installation and masonry stage, so as to ensure the release of expansion stress.

[0033] Preferably, the present application adjusts the refractory material by compression in the low-temperature heating stage of the melting furnace; adjusts the refractory material by slow and quantitative release in the medium-temperature heating stage of the melting furnace; adjusts the refractory material by release in the high-temperature heating stage of the melting furnace, and the release strength is greater than that in the medium-temperature heating stage of the melting furnace; adjusts the refractory material by compression in the end of the heating stage of the melting furnace, so that different expansion adjustment processes are adopted for the melting furnace in different stages, so that the refractory material used on the corresponding melting furnace reaches the full expansion characteristics, so as to reach the expansion size meeting the process technical requirements.

[0034] Preferably, the melting furnace parts of the present application include a melting furnace top structure, a melting furnace side breast wall structure, a melting furnace side pool wall structure, a melting furnace conductive structure and a melting furnace bottom structure; the expansion directions of each part are different due to different melting furnace parts, and the expansion size of the refractory material is adjusted and controlled according to different melting furnace parts, so as to further ensure the accuracy of the expansion size adjustment.

[0035] The present application also provides a kind of expansion adjustment system suitable for ultra-thin glass electrically assisted melting furnace baking, the steps of the expansion adjustment method described above can be realized by the system, the expansion size of the refractory material cannot be finely controlled by using the system, and the system has good popularization and application value. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The flowchart of the expansion adjustment method suitable for ultra-thin glass electrically assisted melting furnace baking provided for the embodiment 1 of the present application is provided;

[0037] Figure 2 The flowchart of the expansion adjustment method suitable for ultra-thin glass electrically assisted melting furnace baking provided for the embodiment 2 of the present application is provided;

[0038] Figure 3 The expansion schematic diagram of the refractory material of the melting furnace horizontal structure provided for the embodiment 2 of the present application is provided;

[0039] Figure 4 The structural schematic diagram of the expansion adjustment system suitable for ultra-thin glass electrically assisted melting furnace baking provided for the embodiment 3 of the present application is provided.

[0040] REFERENCE NUMERALS:

[0041] 1-melting furnace top structure;2-melting furnace side breast wall structure;3-melting furnace side pool wall structure;4-melting furnace conductive structure;5-melting furnace bottom structure. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below by combining the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] The purpose of the present application is to provide an expansion adjustment system and method suitable for ultra-thin glass electrically assisted melting furnace baking, to finely control the expansion size of the refractory material, so that the expansion size completely meets the process technical requirements.

[0044] In order to make the above-mentioned purposes, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below by combining the drawings and specific embodiments.

[0045] Embodiment 1

[0046] As Figure 1 shown, the embodiment provides a method for adjusting expansion of an ultra-thin glass electrically-fused kiln, and the specific steps are as follows:

[0047] S1: obtaining the predicted release amount and the thermal expansion coefficient of the refractory material for constructing the kiln;

[0048] S2: installing the kiln according to the predicted release amount;

[0049] S3: baking the kiln, and combining the thermal expansion coefficient and the kiln part to compress and release the refractory material at different stages of baking.

[0050] In order to more clearly understand the technical content of the embodiment, the technical terms in the art are explained as follows:

[0051] The expansion of the refractory material refers to the change in length and volume of the refractory material itself during heating, which is indicated by the expansion rate and the expansion coefficient, and the numerical value is equivalent to the expansion amount in a certain direction per unit temperature change and the actual length before expansion in that direction. The expansion rate is the relative change rate of the sample length between room temperature and test temperature, which is indicated by %. The average thermal expansion coefficient is the relative change rate of the sample length per 1℃ temperature rise between room temperature and test temperature.

[0052] The expansion performance of the refractory material directly affects the tightness of the kiln lining length and the stability of the structure. In actual work, the baking system should be determined according to the expansion and the construction of the lining body to avoid damage to the refractory material caused by excessive expansion.

[0053] The expansion performance of the refractory material is also related to the heat transfer and heat conversion of the material itself. The heat transfer of the material itself is called thermal conductivity, also known as thermal conductivity coefficient. The thermal conductivity coefficient of the refractory material is the heat insulation and heat preservation ability of the material in the application process, and it is the basic data for thermal calculation in thermal design. The thermal conductivity coefficient of the refractory material depends on the chemical composition, crystal structure, and reaction of the refractory material production and processing state, the pore distribution and the size of the porosity.

[0054] The glass melting furnace (short for melting furnace) mentioned in the embodiment refers to a kiln for producing ultra-thin sheet glass for electronic display devices. In the embodiment, the melting furnace is a kiln with a hydrogen-oxygen combustion upper structure and an electrode-loaded current lower structure.

[0055] The baking kiln process mentioned in the embodiment is to continuously heat and warm the kiln by providing heat through reaction by passing a mixed gas of a large amount of air and combustion gas into the kiln, and making the mixed gas flow rapidly and sufficiently in the internal space of the kiln, especially heating the refractory material of the whole kiln, so that the kiln enters a certain high temperature state.

[0056] The expansion of the refractory material mentioned in the embodiment refers to a physical property that when the refractory material is subjected to temperature rise, the activity of atoms in its own structure increases, resulting in an increase in atomic spacing, and further leading to an increase in volume or length of the refractory material.

[0057] Embodiment 2

[0058] As shown in Figure 2 , the embodiment provides a method for adjusting expansion of an electrically assisted thin glass melting kiln, which has the same main concept as embodiment 1 and is further optimized based on the scheme of embodiment 1, and specifically includes:

[0059] A method for adjusting expansion of an electrically assisted thin glass melting kiln includes the following steps:

[0060] The refractory material is classified, and the corresponding predicted release amount and thermal expansion coefficient are obtained according to the classification; the classification of the refractory material includes sintering, electric melting, compression molding and casting, but is not limited to the above classification; the refractory material is an inorganic non-metallic material with a refractory temperature not lower than 1580℃.

[0061] A reserved gap is obtained according to the predicted release amount, and the melting kiln is installed according to the reserved gap.

[0062] Combined with the thermal expansion coefficient and the melting kiln part, the refractory material is adjusted by applying mechanical stress external stress as follows:

[0063] In the low-temperature heating stage of the melting kiln, the refractory material is adjusted by compression;

[0064] In the medium-temperature heating stage of the melting kiln, the refractory material is adjusted by slow and quantitative release;

[0065] In the high-temperature heating stage of the melting kiln, the refractory material is adjusted by release, and the release strength is greater than that in the medium-temperature heating stage of the melting kiln;

[0066] In the end of the heating stage of the melting kiln, when the melting kiln is heated to above 1500℃ and enters the end of the heating stage of the melting kiln, the refractory material is adjusted by compression.

[0067] The melting kiln part specifically includes a melting kiln top structure 1, a melting kiln side breast wall structure 2, a melting kiln side pool wall structure 3, a melting kiln conductive structure 4 and a melting kiln bottom structure 5. As shown in Figure 3As shown, the overall structure of the refractory material in the melting furnace can be seen in the general situation of expansion in various directions. From the figure, it can be seen that the top structure 1 of the melting furnace is affected by the arc-shaped dome structure, so the expansion direction of the refractory material is downward on both sides and upward. The refractory material expansion direction of the melting furnace side breast wall structure 2, the melting furnace side pool wall structure 3 and the melting furnace conductive structure 4 is the outside on both sides and upward. The expansion direction of the refractory material of the bottom structure 5 of the melting furnace is the outside on both sides. The expansion directions of the multiple parts of the furnace are different, and the expansion process methods that need to be adjusted are different, and the structure characteristics need to be considered. And it can be seen that in the heating process, some parts of the structure of the melting furnace (such as the top structure 1 of the furnace and the side breast wall structure 2 of the furnace, the side breast wall structure 2 of the furnace and the side pool wall structure 3 of the furnace) all have mutual interference problems, so the expansion adjustment process needs to be fully considered when formulating the expansion adjustment process.

[0068] Example 3

[0069] The present embodiment is a kind of expansion adjustment system suitable for super-thin glass electric melting furnace of overflow method large extraction quantity, which is specially proposed for such equipment as super-thin glass electric melting furnace.The system includes an acquisition module, an installation module and an adjustment module;The acquisition module is used to acquire the predicted release amount and the thermal expansion coefficient of the refractory material constituting the melting furnace;The installation module is used to install the melting furnace according to the predicted release amount;The adjustment module is used to bake the melting furnace, and the thermal expansion coefficient and the part of the melting furnace are used to compress and release the refractory material at different stages of baking.

[0070] The system proposed in the present embodiment realizes the following method steps: during the installation stage of the melting furnace, the interference between the refractory materials of each part of the melting furnace and the interference between different types of refractory materials due to expected expansion is considered, and a gap is reserved in advance to release the expansion stress. During the low-temperature heating stage of the melting furnace, the structure of each part of the melting furnace needs to be adjusted. Secondly, due to the influence of liquid water vapor and impurity air bubbles expelled by the refractory material itself, the structure of the refractory material itself will shrink and deform, and then different degrees of fastening need to be used for shrinkage adjustment of each part of the melting furnace. But when the refractory material of the melting furnace ends the shrinkage, the melting furnace enters the medium-temperature heating stage, and after continuous heating, the refractory material is slowly and quantitatively expanded. When the melting furnace reaches the high-temperature heating stage, the refractory material will quickly expand due to continuous heat, and the expansion change amount is adjusted accordingly. After the melting furnace is heated to above 1500℃ and the heating is completed, the overall structure of each part of the melting furnace needs to be adjusted again. Through the adjustment changes in different stages, different expansion adjustment processes are used for the melting furnace, so that the refractory material used on the corresponding melting furnace can fully expand.

[0071] The key point of the present application is that the expansion adjustment strategy is formulated according to different types of refractory materials at different positions of the kiln, and the adjustment method is formulated according to the different expansion stresses released by the different types of refractory materials, so as to conform to the overall structure expansion of the kiln. And this method fully considers the special heating mode of the electric smelting kiln, and the special method of expansion adjustment of the corresponding refractory material.

[0072] According to the physical expansion effect of the refractory material during the heating process of the kiln, the surrounding other equipment will also expand. It is necessary to continuously adjust the refractory material or the attached equipment during the expansion process. Through the process method and human intervention measures, the expansion has controllable and efficient ability. Through continuous practice, it is found that the expansion size cannot completely meet the process technical requirements, and there is a small influence. Therefore, the process method is used to solve this problem.

[0073] The expansion adjustment process method provided by the present application is an adjustment method specially formulated for the overflow method large drawing amount ultra-thin glass electric smelting kiln. Because the expansion characteristics of the conductive material used in the electric smelting kiln are different from those of the general refractory material, it is necessary to continuously and slowly adjust in batches and multiple times in the whole heating process. Moreover, during the early installation process, the expansion gap of the refractory material in contact with it needs to be fully calculated and considered in advance, so the process method sets the kiln installation stage reserved gap adjustment. And after the heating and expansion are completed, because the expansion gap reserved in advance may not be completely closed, the high-temperature liquid glass liquid will enter the gap and form high-temperature erosion to the conductive material. Therefore, the process method sets the kiln end heating shrinkage adjustment, which optimizes the expansion adjustment for this problem. The above method fully considers the special expansion characteristics of different types of refractory materials in the heating process of the overflow method large drawing amount ultra-thin glass kiln, so as to better monitor, check and adjust the data by fully considering the characteristics.

[0074] Compared with the original non-systematic method, the adjustment method provided by the present application has the advantages of systematization, continuity, authenticity, convenience and a series of advantages.

[0075] The above embodiment is only one of the implementation manners of the technical scheme of the present application, and the scope of protection claimed by the present application is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily thought by those skilled in the art within the technical scope disclosed by the present application.

Claims

1. A method for adjusting the expansion of an ultra-thin glass electrically-boosted kiln, the method comprising: adjusting the expansion of the ultra-thin glass electrically-boosted kiln by adjusting the temperature of the ultra-thin glass electrically-boosted kiln. The method comprises the following steps: S1: obtaining the expected release amount and the thermal expansion coefficient of the refractory material for constructing the furnace; S2: installing the furnace according to the expected release amount; S3: baking the furnace, and combining the thermal expansion coefficient and the furnace part, the refractory material is compressed and released at different stages of the baking; In S3, the different stages of the baking include a low-temperature heating stage of the furnace, a medium-temperature heating stage of the furnace, a high-temperature heating stage of the furnace, and an end heating stage of the furnace; Combining the thermal expansion coefficient and the furnace part, the refractory material is adjusted by external stress as follows: In the low-temperature heating stage of the furnace, the refractory material is compressed and adjusted; In the medium-temperature heating stage of the furnace, the refractory material is slowly and quantitatively released and adjusted; In the high-temperature heating stage of the furnace, the refractory material is released and adjusted, and the release strength is greater than that in the medium-temperature heating stage of the furnace; In the end heating stage of the furnace, the refractory material is compressed and adjusted.

2. The method for adjusting the expansion of the ultra-thin glass electrically fused kiln according to claim 1, wherein, In S1, before obtaining the expected release amount and the thermal expansion coefficient, the refractory material is classified, and the corresponding expected release amount and the thermal expansion coefficient are obtained according to the classification.

3. The method for adjusting the expansion of the ultra-thin glass electrically fused kiln according to claim 2, wherein, The classification of the refractory material includes sintering, electric melting, compression molding, and casting.

4. The method for adjusting the expansion of the ultra-thin glass electrically fused kiln according to claim 1, wherein, The refractory material is an inorganic non-metallic material with a refractory temperature not lower than 1580 DEG C.

5. The method for adjusting the expansion of the ultra-thin glass electrically fused kiln according to claim 1, wherein, The specific steps of S2 are as follows: According to the reserved gap obtained according to the expected release amount, the furnace is installed.

6. The method for adjusting the expansion of the ultra-thin glass electrically fused kiln according to claim 1, wherein, When the temperature of the furnace is raised to 1500 DEG C or above, the end heating stage of the furnace is entered.

7. The method for adjusting the expansion of the ultra-thin glass electrically fused kiln according to claim 1, wherein, In S3, the furnace part includes a top structure (1) of the furnace, a side breast wall structure (2) of the furnace, a side pool wall structure (3) of the furnace, a conductive structure (4) of the furnace, and a bottom structure (5) of the furnace.

8. A system for adjusting the expansion of an ultra-thin glass electrically boosted furnace, adapted to implement the method for adjusting the expansion of an ultra-thin glass electrically boosted furnace according to any one of claims 1 to 7, characterized in that, The method comprises: An obtaining module is configured to obtain the expected release amount and the thermal expansion coefficient of the refractory material for constructing the furnace; An installation module is configured to install the furnace according to the expected release amount; An adjustment module is configured to bake the furnace, and combine the thermal expansion coefficient and the furnace part, and compress and release the refractory material at different stages of the baking.

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