CN107512845B - Stirring device for molten glass and platinum channel - Google Patents
Stirring device for molten glass and platinum channel Download PDFInfo
- Publication number
- CN107512845B CN107512845B CN201710652864.5A CN201710652864A CN107512845B CN 107512845 B CN107512845 B CN 107512845B CN 201710652864 A CN201710652864 A CN 201710652864A CN 107512845 B CN107512845 B CN 107512845B
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- stirring
- heater
- molten glass
- stirring device
- shaft
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- 238000003756 stirring Methods 0.000 title claims abstract description 132
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 239000006060 molten glass Substances 0.000 title claims abstract description 40
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 27
- 238000010438 heat treatment Methods 0.000 claims abstract description 54
- 239000011521 glass Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000002156 mixing Methods 0.000 claims description 14
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000000701 coagulant Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000004575 stone Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000000265 homogenisation Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001260 Pt alloy Inorganic materials 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000003039 volatile agent Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/18—Stirring devices; Homogenisation
- C03B5/187—Stirring devices; Homogenisation with moving elements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/18—Stirring devices; Homogenisation
- C03B5/183—Stirring devices; Homogenisation using thermal means, e.g. for creating convection currents
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
The invention discloses a stirring device for molten glass and a platinum channel, wherein the stirring device for molten glass comprises a stirring container (1), a heater (2) and a stirring shaft (3), the heater is arranged on the top of the stirring container, the heater is provided with a through hole (21), the stirring shaft penetrates through the through hole and extends into the stirring container, and the through hole is provided with a heating cavity (22) surrounding the stirring shaft. According to the invention, the heater is arranged at the top of the stirring container, the heating cavity is heated by raising the temperature of the heater, and heat is brought to the stirring shaft, so that the temperature of the stirring container is increased, the cooler area of the stirring shaft is moved upwards to the top position of the heater, and therefore, glass liquid is effectively prevented from being condensed in the heating cavity and on the stirring shaft at the lower part of the heating cavity, the condition that the temperature of the stirring container is excessively raised due to the treatment of coagulants of the stirring container is avoided, and the service life of the platinum channel is prolonged.
Description
Technical Field
The invention relates to the technical field of material homogenization, in particular to a stirring device for molten glass and a platinum channel.
Background
In the process of manufacturing liquid crystal substrate glass, the batch is required to be melted into molten glass, the molten glass reaches a platinum channel for clarification and homogenization, the molten glass is conveyed to a forming procedure through the platinum channel to be manufactured into a semi-finished glass plate, and the semi-finished glass plate is processed into a finished product.
With the technical progress and the higher display accuracy of the display panel in the market, the demand for improving the quality of the substrate glass and the market expectation are pushed in turn, which requires that the number of stones in the substrate glass is reduced as much as possible or no stone defects are generated. In the manufacturing process of the substrate glass, the glass stone defects are generated due to a plurality of reasons, equipment materials generate the defects, glass components volatilize and fall to generate the defects, and external foreign matters enter the glass liquid passing through the platinum channel to generate the defects.
Since the glass liquid generates strong volatilization in the stirring area of the platinum channel, the generated volatile matters are condensed at a place with low temperature relative to the glass liquid. Due to the structure of the stirring container, the temperature above the glass liquid level in the stirring container is low, so that volatile matters flow out from the upper part of the stirring container. The stirring shaft can not be heated, so that volatile matters can be condensed on the stirring shaft above the liquid level of the glass, and the condensate can fall into the molten glass to cause stone defects after reaching a certain degree, thereby reducing the quality of the glass. In the platinum passageway, the (mixing) shaft is rotatory for the stirred vessel, because the reason of mechanical transmission and motion, the (mixing) shaft can take place vibrations phenomenon, and this kind of vibrations phenomenon has aggravated the coagulum that condenses on the (mixing) shaft and has fallen the glass liquid more, has worsened the glass quality more.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a stirring device for molten glass and a platinum channel, wherein the stirring device can effectively prevent volatile matters in the molten glass from being condensed, and the service life of the platinum channel is prolonged.
In order to achieve the above object, according to an aspect of the present invention, there is provided a stirring apparatus for molten glass, including a stirring vessel, a heater provided on a top of the stirring vessel, and a stirring shaft, the heater being provided with a through-hole through which the stirring shaft extends into the stirring vessel, the through-hole being provided with a heating chamber surrounding the stirring shaft.
Preferably, a lateral dimension of the heating cavity is larger than a lateral dimension of the through hole.
Preferably, the transverse gap between the outer wall of the stirring shaft and the inner wall of the through hole is 5mm-20mm, and more preferably, the transverse gap is 6mm-10 mm.
Preferably, a baffle plate is sleeved on the stirring shaft in the heating cavity, wherein preferably, the transverse gap between the inner wall of the heating cavity and the outer edge of the baffle plate is 5mm-20mm, and particularly preferably, the transverse gap is 10mm-15 mm.
Preferably, the heater includes a first heater and a second heater, the first heater is disposed on the top of the stirring container, the second heater is disposed on the top surface of the first heater, a first through hole is provided in the first heater, a second through hole is provided in the second heater, and the heating cavity extends upward from the bottom surface of the second heater along the axial direction of the stirring shaft and is communicated with the second through hole.
Preferably, the axial distance between the bottom surface of the baffle and the top surface of the first heater is 5mm to 20mm, more preferably 10mm to 15 mm.
Preferably, the axial distance between the top surface of the baffle plate and the top surface of the heating chamber is from 30mm to 100mm, more preferably from 50mm to 80 mm.
Preferably, the heating temperature of the heating cavity is 1300-1500 ℃, and more preferably, the heating temperature is 1400-1450 ℃.
Preferably, the stirring container comprises an upper stirring inlet and a lower stirring outlet, a liquid level line is further arranged in the stirring container, and the end part of the stirring shaft is positioned below the liquid level line.
In addition, according to another aspect of the present invention, there is provided a platinum passage in which the stirring device for molten glass described above is provided.
According to the technical scheme, the heater is arranged at the top of the stirring container, the heating cavity is heated by raising the temperature of the heater, and heat is brought to the stirring shaft, so that the temperature of the stirring container is increased, a cold area of the stirring shaft is moved to the top of the heater, glass liquid is effectively prevented from being condensed in the heating cavity and on the stirring shaft at the lower part of the heating cavity, the condition that the temperature of the stirring container is excessively raised due to treatment of coagulants of the stirring container is avoided, and the service life of a platinum channel is prolonged.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a cross-sectional view of a stirring device for molten glass according to one embodiment of the present invention;
fig. 2 is a sectional view of a stirring apparatus for molten glass according to another embodiment of the present invention.
Description of the reference numerals
1 stirring vessel 2 Heater
3 stirring shaft 4 baffle
11 stirring inlet and 12 stirring outlet
13 liquid level line 21 through hole
22 heating cavity 23 first heater
24 first through hole of second heater 231
241 second through hole
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like are generally described with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction. "axial" means the axial direction of the stirring shaft 3; "transverse" means a direction perpendicular to the axial direction.
In the present invention, the "glass frit" of the liquid crystal substrate glass is described as an example in the embodiment, but the present invention is not limited to this, and may be, for example, a general glass frit or the like.
In the process of manufacturing liquid crystal substrate glass, the batch is required to be melted into molten glass, the molten glass reaches a platinum channel for clarification and homogenization, the molten glass is conveyed to a forming procedure through the platinum channel to be manufactured into a semi-finished glass plate, and the semi-finished glass plate is processed into a finished product.
Since the glass liquid generates strong volatilization in the stirring area of the platinum channel, the generated volatile matters are condensed at a place with low temperature relative to the glass liquid. Due to the structure of the stirring vessel 1, the temperature above the glass surface in the stirring vessel is low, so that the volatile matter flows out from the upper part of the stirring vessel 1. The stirrer shaft 3 itself cannot be heated, so volatiles condense on the stirrer shaft 3 above the glass level.
In order to solve the above defects, in the prior art, a mode of raising the temperature of the stirring container 1 as much as possible is adopted, so that the temperature of a part of the stirring shaft 3 in a gas space above the liquid level of the glass is raised, and the condensate is moved upwards to the stirring shaft 3 far away from the liquid level of the glass as much as possible, so as to reduce the quantity of stones falling into the liquid level of the glass. But the method also causes a great deal of volatilization of glass components and precious metals, thereby not only changing the glass components, but also reducing the service life of the platinum channel stirring barrel.
Accordingly, the present invention provides a stirring device for molten glass, with particular reference to fig. 1 and 2. The stirring device for molten glass comprises a stirring container 1, a heater 2 and a stirring shaft 3, wherein the heater 2 is arranged on the top of the stirring container 1, the heater 2 is provided with a through hole 21, the stirring shaft 3 penetrates through the through hole 21 and extends into the stirring container 1, and the through hole 21 is provided with a heating cavity 22 surrounding the stirring shaft 3.
According to the invention, the heater 2 is arranged at the top of the stirring container 1, the heating cavity 22 is heated by raising the temperature of the heater 2, and heat is brought to the stirring shaft 3, so that the temperature of the stirring container 1 is increased, the cooler area of the stirring shaft 3 is moved upwards to the top position of the heater 2, and therefore, the glass liquid is effectively prevented from being condensed in the heating cavity 22 and on the stirring shaft 3 at the lower part of the heating cavity 22, the condition that the temperature of the stirring container 1 is excessively raised due to the treatment of the condensate of the stirring container 1 is avoided, and the service life of a platinum channel is prolonged.
Wherein the transverse dimension of the heating cavity 22 is larger than that of the through hole 21. Since the heating chamber 22 is heated by the heater 2, heat can be retained in the heating chamber 22 to further increase the temperature in the through-holes 21, preventing the volatiles of the molten glass from condensing in the through-holes 21 and on the stirring shaft 3 above the glass liquid level.
In order to prevent a large amount of molten glass in the stirring vessel 1 from being volatilized through the through-holes 21 by heating. In a preferred embodiment of the invention, in particular, the lateral clearance between the outer wall of the stirring shaft 3 and the inner wall of the through hole 21 is 5mm to 20mm, more preferably 6mm to 10 mm. It will be appreciated by those skilled in the art that the lateral clearance between the outer wall of the mixer shaft 3 and the inner wall of the through bore 21 may be designed according to the dimensions of the particular mixing apparatus.
In the prior art, the concretions on the stirring shaft 3 fall into molten glass to cause the defects of concretions after reaching a certain degree, thereby reducing the quality of the glass. In the platinum passageway, (mixing) shaft 3 is rotatory for stirred vessel 1, because mechanical transmission and reasons of motion, (mixing) shaft 3 can take place vibrations phenomenon, and this kind of vibrations phenomenon has aggravated the coagulum that condenses on (mixing) shaft 3 more and has fallen the glass liquid, has worsened the glass quality more.
Therefore, in particular, the stirring shaft 3 in the heating cavity 22 is sleeved with the baffle plate 4, preferably, the transverse gap between the inner wall of the heating cavity 22 and the outer edge of the baffle plate 4 is 5mm-20mm, and particularly preferably, the transverse gap is 10mm-15 mm. Make the volatile substance of glass liquid condense at the top position of heater to because reasons such as (mixing) shaft 3 vibration lead to falling, because baffle 4's barrier effect, the condensate also can not fall to stirring vessel 1's glass liquid in, therefore can not influence the quality of material in the stirring vessel. Of course, the baffle 4 may also be formed as a tray with an upward opening so that the condensate falling on the baffle 4 does not fall from the baffle 4 into the molten glass due to the vibration of the stirring shaft 3.
Referring to fig. 1, a preferred embodiment of the stirring device of the present invention is shown. Wherein the heater 2 is an integral body. Of course, it will be appreciated by those skilled in the art that a plurality of heating units may be provided in the heater 2, and that the plurality of heating units may also be individually controlled to provide different heating temperatures.
In another preferred embodiment of the present invention, referring to fig. 2, the heater 2 is a split structure. Specifically, the heater 2 includes a first heater 23 and a second heater 24, the first heater 23 is disposed on the top of the stirring container 1, the second heater 24 is disposed on the top surface of the first heater 23, a first through hole 231 is provided in the first heater 23, a second through hole 241 is provided in the second heater 24, and the heating chamber 22 extends upward from the bottom surface of the second heater 24 in the axial direction of the stirring shaft 3 and communicates with the second through hole 241.
Wherein the bottom surface of the second heater 24 is hermetically connected with the top surface of the first heater 23. Preferably, the contact surfaces of the second heater 24 and the first heater 23 are made of platinum or platinum alloy, and the internal heating wires of the second heater 24 and the first heater 23 are also made of platinum or platinum alloy.
In a preferred embodiment of the invention, in particular, the axial distance between the bottom face of the baffle 4 and the top face of the first heater 23 is between 5mm and 20mm, more preferably between 10mm and 15 mm; the axial distance between the top surface of the baffle 4 and the top surface of the heating chamber 22 is 30mm to 100mm, preferably 50mm to 80 mm. It will be appreciated by those skilled in the art that the axial distance between the top surface of the baffle 4 and the top surface of the heating chamber 22, and the axial distance between the bottom surface of the baffle 4 and the top surface of the first heater 23, may be designed according to the dimensions of the particular stirring device.
Wherein, in particular, the heating temperature of the heating chamber 22 is 1300 ℃ to 1500 ℃, and preferably, the heating temperature is 1400 ℃ to 1450 ℃. The temperature difference between the inside and the outside of the heating cavity 22 is higher than 1300 ℃, and the internal pressure of the heating cavity 22 is higher than the external pressure, so that the phenomenon that foreign matters or coagulates enter glass liquid is reduced, the influence on glass finished products is reduced, and the glass quality is improved.
Referring to fig. 1 and 2, the stirring vessel 1 comprises an upper stirring inlet 11 and a lower stirring outlet 12, a liquid level line 13 is further arranged in the stirring vessel 1, and the end of the stirring shaft 3 is positioned below the liquid level line 13. The molten glass enters the stirring container 1 through the upper stirring inlet 11, is stirred by the stirring shaft 3 to be homogenized in the stirring container 1, and the homogenized molten glass flows out of the stirring container 1 through the lower stirring outlet 12 to enter the next process. The liquid level line 13 prevents the glass liquid from overflowing from the through hole 21. The heating action of the heater 2 prevents the glass liquid from condensing in the cavity between the liquid level line 13 and the top end of the stirring vessel 1, and thus ensures the quality of the glass and the normal stirring of the stirring shaft 3.
In addition, the invention also provides a platinum channel, and the stirring device for the molten glass is arranged in the platinum channel. Through set up heater 2 at the top of stirred vessel 1, raise the temperature through heater 2 in order to heat heating chamber 22, and bring the heat for (mixing) shaft 3, thereby increased stirred vessel 1's temperature, make the colder region of (mixing) shaft 3 go up to move to the top position of heater 2, even produce the volatile substance here and condense and fall the phenomenon, because the existence of baffle 4, the volatile condensate can not fall in stirred vessel 1's the glass liquid yet, therefore can not influence the quality of material in the stirred vessel. The cleaning action of the stirring shaft is avoided, the condition that the stirring container 1 is excessively heated due to the treatment of the stones in the stirring container 1 is also avoided, and the service life of the platinum channel is prolonged.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (14)
1. The utility model provides a agitating unit for glass liquid, characterized in that, this agitating unit for glass liquid includes stirred vessel (1), heater (2), (mixing) shaft (3), heater (2) set up on the top of stirred vessel (1), heater (2) are equipped with perforating hole (21), (mixing) shaft (3) are passed perforating hole (21) stretch into to in stirred vessel (1), perforating hole (21) are equipped with around heating chamber (22) of (mixing) shaft (3), heating chamber (22) are located the axial middle part position of perforating hole (21), the transverse dimension of heating chamber (22) is greater than the transverse dimension of perforating hole (21), are located in heating chamber (22) the cover is equipped with baffle (4) on (mixing) shaft (3).
2. The stirring device for molten glass according to claim 1, wherein a lateral clearance between an outer wall of the stirring shaft (3) and an inner wall of the through hole (21) is 5mm to 20 mm.
3. The stirring device for molten glass according to claim 2, wherein a lateral clearance between an outer wall of the stirring shaft (3) and an inner wall of the through hole (21) is 6mm to 10 mm.
4. Stirring device for molten glass according to claim 1, characterised in that the lateral clearance between the inner wall of the heating chamber (22) and the outer edge of the baffle plate (4) is 5-20 mm.
5. A stirring device for molten glass according to claim 4, characterized in that the transverse gap between the inner wall of the heating chamber (22) and the outer edge of the baffle plate (4) is 10-15 mm.
6. The stirring device for molten glass according to claim 1, wherein the heater (2) comprises a first heater (23) and a second heater (24), the first heater (23) is provided on the top of the stirring vessel (1), the second heater (24) is provided on the top surface of the first heater (23), a first through hole (231) is provided in the first heater (23), a second through hole (241) is provided in the second heater (24), and the heating chamber (22) extends upward from the bottom surface of the second heater (24) in the axial direction of the stirring shaft (3) and communicates with the second through hole (241).
7. Stirring device for molten glass according to claim 6, characterised in that the axial distance between the bottom surface of the baffle (4) and the top surface of the first heater (23) is 5-20 mm.
8. Stirring device for molten glass according to claim 7, characterised in that the axial distance between the bottom surface of the baffle (4) and the top surface of the first heater (23) is 10-15 mm.
9. A stirring device for molten glass according to claim 6, wherein the axial distance between the top surface of the baffle plate (4) and the top surface of the heating chamber (22) is 30mm-100 mm.
10. Stirring device for molten glass according to claim 9, characterised in that the axial distance between the top surface of the baffle (4) and the top surface of the heating chamber (22) is 50-80 mm.
11. The stirring device for molten glass according to claim 6, wherein the heating temperature of the heating chamber (22) is 1300 ℃ to 1500 ℃.
12. The stirring device for molten glass according to claim 11, wherein the heating temperature of the heating chamber (22) is 1400 ℃ to 1450 ℃.
13. Stirring device for molten glass according to claim 6, characterised in that the stirring vessel (1) comprises an upper stirring inlet (11) and a lower stirring outlet (12), that a level line (13) is also provided in the stirring vessel (1), and that the end of the stirring shaft (3) is located below the level line (13).
14. A platinum channel, characterized in that a stirring device for molten glass according to any one of claims 1 to 13 is provided in the platinum channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652864.5A CN107512845B (en) | 2017-08-02 | 2017-08-02 | Stirring device for molten glass and platinum channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710652864.5A CN107512845B (en) | 2017-08-02 | 2017-08-02 | Stirring device for molten glass and platinum channel |
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| Publication Number | Publication Date |
|---|---|
| CN107512845A CN107512845A (en) | 2017-12-26 |
| CN107512845B true CN107512845B (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710652864.5A Active CN107512845B (en) | 2017-08-02 | 2017-08-02 | Stirring device for molten glass and platinum channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108911481B (en) * | 2018-07-24 | 2021-08-13 | 彩虹显示器件股份有限公司 | Top heating device of platinum channel stirring tank |
| CN109879581B (en) * | 2019-03-21 | 2021-11-12 | 湖北新华光信息材料有限公司 | Device and method for manufacturing fluorophosphate optical glass |
| CN113830995B (en) * | 2021-09-01 | 2023-07-07 | 河北光兴半导体技术有限公司 | Method for eliminating bubbles of glass liquid, application of method, glass liquid and application of glass liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8650910B2 (en) * | 2010-08-23 | 2014-02-18 | Corning Incorporated | Apparatus for homogenizing a glass melt |
| CN106746497B (en) * | 2016-12-15 | 2021-02-26 | 东旭光电科技股份有限公司 | Platinum channel stirring barrel and platinum channel stirring barrel device |
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Application publication date: 20171226 Assignee: Liaoyuan Shengyuan New Material Technology Co.,Ltd. Assignor: DONGXU OPTOELECTRONIC TECHNOLOGY Co.,Ltd. Contract record no.: X2023110000058 Denomination of invention: Mixing device and platinum channel for glass liquid Granted publication date: 20210806 License type: Common License Record date: 20230506 |
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