Pilot-scale test furnace platinum crucible for glass ceramic production

Abstract

The utility model discloses a pilot plant test furnace platinum crucible for glass ceramic production, which comprises a melting pot body, an omega-shaped expansion structure is arranged in the circumferential direction of the pot body, a split pot cover is arranged above the melting pot body, a discharge pipe is connected below the melting pot body, a grating filter screen with a V-shaped structure is arranged inside the melting pot body, a bubbling pipe is arranged on the split pot cover, and the bubbling pipe is connected with a nozzle. An electrode is arranged at the bottom of the discharging pipe; the problems of thermal stress deformation and fatigue cracking caused by alternate cooling and heating are effectively solved by arranging an omega-shaped expansion structure and a grid filter screen of a V-shaped structure on the periphery of the melting pot body, the problems that a traditional barrel-shaped platinum crucible is prone to thermal shock deformation and cracking and the like are solved, the blowing-out maintenance and shaping frequency is reduced, the service life is remarkably prolonged, and the production cost is reduced. And under the condition of the same volume, the usage amount of platinum is reduced by more than 20% compared with that of a traditional barrel-shaped platinum crucible, and the manufacturing cost of the platinum crucible is remarkably saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pilot plant platinum crucible for microcrystalline glass production relates to special glass melting equipment. BACKGROUND

[0002] Microcrystalline glass, also known as glass ceramic, is a kind of polycrystalline solid material containing a large number of microcrystalline phase and glass phase, which is prepared by controlling crystallization of base glass with specific composition during ultra-high temperature heating. It has high mechanical strength, adjustable thermal expansion performance, heat shock resistance, chemical corrosion resistance, low dielectric loss and other superior performance, and is widely used in mechanical manufacturing, optics, electronics and microelectronics, aerospace, chemistry, industry, biomedicine and construction fields.

[0003] The mainstream melting process of microcrystalline glass adopts single crucible and tank kiln method. Single crucible melting is suitable for small batch production. This method has high flexibility and relatively low cost, and can meet the production of non-large size microcrystalline glass. The maximum diameter of microcrystalline glass produced by single crucible melting method can reach about 1 meter. Since the melting temperature of microcrystalline glass is relatively high, the process temperature needs to be stabilized at more than 1600 DEG C, and the crucible deforms during frequent melting and discharging, even cracks locally, which seriously affects the service life of the melting crucible. The service life of the mainstream non-maintenance in the industry is about 4-6 months. UTILITY MODEL CONTENT

[0004] The utility model provides a pilot plant platinum crucible for microcrystalline glass production to overcome the defects of easy deformation, easy cracking and short service life of the platinum crucible for ultra-high temperature microcrystalline glass production in the prior art.

[0005] In order to solve the above technical problems, the utility model provides the following technical scheme:

[0006] The utility model discloses a pilot plant platinum crucible for microcrystalline glass production, including melting pot body, its pot body circumferential direction is equipped with " omega type " expansion structure, the upper of melting pot body is equipped with split type pot cover, its lower side is connected with the pipe of discharging, is equipped with the grid filter screen of " V type " structure in the inside, the split type pot cover is equipped with the bubbler pipe on it, the bottom of pipe of discharging is equipped with the electrode.

[0007] Further, the split type pot cover includes a conical pot cover, an upper portion of the conical pot cover is provided with a feeding hopper, and the conical pot cover and the feeding hopper are connected through a connecting pipe. The connecting pipe is provided with a plurality of reinforcing ribs on an outer wall thereof. The conical pot cover is provided with a bubbler pipe guide opening, and an edge of the conical pot cover is provided with an "Ω type" expansion structure to prevent thermal stress caused by cold and hot alternation of glass on the pot cover. A back surface of the conical pot cover is provided with a lower limiting ring.

[0008] Further, the upper edge of the melting pot body is provided with four "Ω-shaped" expansion structure pot edges, and the bottom is provided with "Ω-shaped" expansion structure gradually changing from outside to inside along the radius, which prevents thermal stress caused by glass cold and hot alternation on the crucible, and improves the fatigue life of the crucible.

[0009] Further, the "V-shaped" surface of the grid filter is provided with geometrically symmetrical closely spaced filter holes, and a grid with holes is arranged in the V-shaped surface for filtering powder and large slag, and simultaneously bearing the unfused raw materials to avoid the undercooling impact on the pot body.

[0010] Further, the bubbling pipe is "L-shaped" structure, and one vertical pipe is connected with a circular ring pipe, the circular ring pipe is sealed at the broken end, a plurality of Φ0.5-Φ1.0mm bubbling holes are left on the upper edge of the circular ring pipe, the inner diameter of the bubbling pipe is Φ4-Φ8mm, and the wall thickness is 1.2-1.5mm, which is used for blowing and bubbling after glass melting to achieve the function of glass homogenization.

[0011] Further, the discharge pipe is used for guiding the flow of molten glass, forming a stable flow supply, and ensuring the quality of the glass, and the inner diameter is Φ10-Φ20mm, and the wall thickness is 1.0-1.5mm, and 2-4 groups of load electrodes are arranged in the five zones of the discharge pipe, the electrodes are a combination of electrode sheets and electrode cups, which are used for local heating of the pipe and control of the flow of molten glass.

[0012] Further, the electrode cup is tapered with the upper opening being large and the lower opening being small, and the lower opening is connected with the outlet of the discharge pipe, and the upper opening is connected with the electrode sheet of the load.

[0013] The beneficial effects achieved by the utility model are as follows: the "Ω-shaped" expansion structure is arranged around the melting pot body, the "Ω-shaped" expansion structure pot edge and the grid filter with V-shaped structure are arranged on the upper edge of the pot body, the problems of thermal stress deformation and fatigue cracking caused by cold and hot alternation are effectively solved, the problems of traditional round barrel platinum crucible, such as easy cold and hot impact deformation and cracking, are solved, the number of times of shutdown maintenance and shaping is reduced, the service life is significantly prolonged, it is especially suitable for pilot production of large capacity under the high temperature environment of 1500-1680 DEG C, and under the condition of the same capacity, the platinum consumption is reduced by more than 20% compared with the traditional round barrel platinum crucible, and the manufacturing cost of the platinum crucible is significantly saved. DRAWINGS

[0014] The drawings are used to provide further understanding of the utility model, and constitute a part of the specification, and are used together with the embodiments of the utility model to explain the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0015] Figure 1 It is the structural schematic diagram of the utility model;

[0016] Figure 2It is the structure schematic diagram of the split type pot cover of the utility model;

[0017] Figure 3 It is the structure schematic diagram of the melting pot body of the utility model;

[0018] Figure 4 It is the structure schematic diagram of the grid filter of the utility model;

[0019] Figure 5 It is the structure schematic diagram of the bubbling pipe of the utility model;

[0020] Figure 6 It is the structure schematic diagram of the discharging pipe of the utility model;

[0021] Figure 7 It is the structure schematic diagram of the electrode cup of the utility model.

[0022] In the drawing: 1, split type pot cover;1-1, feeding hopper;1-2, connecting pipe;1-3, conical surface pot cover;1-4, reinforcing rib;1-5, bubbling pipe guide opening;1-6, lower limit ring;2, melting pot body;3, grid filter;4, bubbling pipe;5, discharging pipe;6, electrode cup. Specific implementation

[0023] The preferred embodiments of the utility model are described below in combination with the drawings, and it should be understood that the preferred embodiments described here are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0024] Example 1

[0025] As Figures 1-7 shown, a microcrystalline glass production pilot furnace platinum crucible, including melting pot body 2, its pot body circumference is equipped with "Ω type" expansion structure, the upper portion of the melting pot body 2 is equipped with split type pot cover 1, its lower portion is connected with discharging pipe 5, and the inside is equipped with grid filter 3 with "V type" structure, the split type pot cover 1 is provided with bubbling pipe 4, and the bottom of the discharging pipe 5 is provided with electrode.

[0026] The split type pot cover 1 includes conical surface pot cover 1-3, which is provided with feeding hopper 1-1 above, and the two are connected through connecting pipe 1-2, and a plurality of reinforcing ribs 1-4 are connected to the outer wall of connecting pipe 1-2, the conical surface pot cover 1-3 is provided with bubbling pipe guide opening 1-5, the edge adopts "Ω type" expansion structure, which prevents thermal stress caused by glass cold and hot alternation on the pot cover, and the back is provided with lower limit ring 1-6.

[0027] The pot body upper opening of the melting pot body 2 is provided with four pot rims with "Ω type" expansion structure;Its pot bottom is provided with "Ω type" expansion structure gradually changing from outside to inside along the radius, which prevents thermal stress caused by glass cold and hot alternation on the crucible, and improves the fatigue life of the crucible.

[0028] The "V-shaped" surface of the grid filter 3 is provided with geometrically symmetrical closely-spaced filter holes, and the V-shaped surface is provided with a grid with holes for filtering powder and large slag, and simultaneously carrying non-melted raw materials to avoid the impact of supercooling on the pot body.

[0029] The bubbling pipe 4 is in "L-shaped" structure, and is connected with a circular pipe through a vertical pipe. The circular pipe is sealed at the broken end, and a plurality of Φ0.5-Φ1.0 mm bubbling holes are left on the circular pipe. The inner diameter of the bubbling pipe is Φ4-Φ8 mm, and the wall thickness is 1.2-1.5 mm. The bubbling pipe is used for blowing and bubbling after the glass is melted, and has the function of homogenizing the glass.

[0030] The discharge pipe 5 is used for guiding the molten glass liquid to form a stable flow supply and ensure the quality of the glass. The inner diameter of the discharge pipe 5 is Φ10-Φ20 mm, and the wall thickness is 1.0-1.5 mm. The discharge pipe 5 is provided with 2-4 groups of load electrodes in different zones. The electrodes are a combination of electrode sheets and electrode cups 6, which are used for local heating of the pipe and control of the flow of the molten glass liquid.

[0031] The electrode cup 6 is tapered with a large upper opening and a small lower opening, and the lower opening is connected with the outlet of the discharge pipe 5, and the upper opening is connected with the electrode sheet of the load.

[0032] It should be noted that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. The terms used in the description of the present application are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. In order to facilitate description, the sizes of the parts shown in the drawings are not drawn in proportion. The known technologies, methods and devices may not be discussed in detail, but should be considered as part of the authorized description. In all examples shown and discussed herein, any specific value should be interpreted as only exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0033] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the data so distinguished can occur in any sequence. Hence, without departing from the scope of the present application, the data used in "first", "second", etc. can be interchanged with each other. The terms "and / or" and / or "or" as used herein link together alternative language alternatives and are understood to mean that at least one of the alternatives is present and that the alternatives are to be taken together. The term "comprises the possibility of comprising additional elements or steps not listed after the term comprises.

[0034] It should be noted that the terms "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "top", "bottom", and the like as used in this description and in the claims shall relate to the application as it is shown in the drawings and shall not be construed to limit the application to a particular orientation or configuration, unless otherwise noted. The terms "inner", "outer" refer to the inner and outer contours of the components themselves.

Claims

1. A pilot furnace platinum crucible for producing microcrystalline glass, characterized by, The utility model relates to a glass melting furnace, which comprises a melting pot body, a split pot cover, a discharging pipe, a V-shaped grid filter and a bubble tube.

2. The pilot furnace platinum crucible for producing microcrystalline glass according to claim 1, characterized in that, The split pot cover comprises a conical pot cover, which is connected to a feeding hopper through a connecting pipe.

3. The pilot furnace platinum crucible for producing microcrystalline glass according to claim 1, characterized in that, The upper opening of the melting pot body is provided with four pot rims in the shape of an omega, and the bottom of the pot body is provided with omega-shaped expansion structures gradually changing from the outside to the inside along the radius, which prevents thermal stress on the crucible caused by the alternating cold and hot glass and improves the fatigue life of the crucible.

4. The pilot furnace platinum crucible for producing microcrystalline glass according to claim 1, characterized in that, The V-shaped surface of the grid filter is provided with geometrically symmetrical closely spaced filter holes, and a grid with holes is arranged in the V-shaped surface for filtering powder and large slag and for bearing the unfused raw materials to avoid the impact of supercooling on the pot body.

5. The pilot furnace platinum crucible for producing microcrystalline glass according to claim 1, characterized in that, The bubble tube is in the shape of L, which is connected to a circular tube through a vertical tube.

6. The pilot furnace platinum crucible for producing microcrystalline glass according to claim 1, characterized in that, The discharging pipe is used for guiding the flow of the molten glass, forming a stable flow supply and ensuring the quality of the glass.

7. The pilot furnace platinum crucible for producing microcrystalline glass according to claim 6, characterized in that, The electrode cup is tapered with a large upper opening and a small lower opening, and the lower opening is connected to the outlet of the discharging pipe, and the upper opening is connected to the electrode sheet.

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