CN113754247B - Method for producing glass substrate by utilizing platinum channel - Google Patents
Method for producing glass substrate by utilizing platinum channel Download PDFInfo
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- CN113754247B CN113754247B CN202111122409.7A CN202111122409A CN113754247B CN 113754247 B CN113754247 B CN 113754247B CN 202111122409 A CN202111122409 A CN 202111122409A CN 113754247 B CN113754247 B CN 113754247B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/02—Forehearths, i.e. feeder channels
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B17/00—Forming molten glass by flowing-out, pushing-out, extruding or drawing downwardly or laterally from forming slits or by overflowing over lips
- C03B17/06—Forming glass sheets
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Abstract
The present disclosure relates to a method for producing a glass substrate using a platinum channel, comprising a pre-washing step, a discharging step, and a normal feeding step, wherein in the pre-washing step, a feed port and an overflow brick are in an unconnected state, so that molten glass from a kiln can sequentially pass through a lifting section, a clarification section, a first cooling section, a stirring section, a second cooling section, and a feeding section and be discharged through the feed port for N days; stopping feeding the kiln N days after the feeding port discharges materials, entering a discharging step after the feeding port stops discharging materials, and discharging the residual molten glass in the platinum channel for M days in the discharging step; and the feeding port and the overflow brick are connected and communicated, and the materials are continuously fed into the kiln. And after the residual glass in the platinum channel is discharged, entering a normal feeding step, wherein in the normal feeding step, the feeding port and the overflow brick are in a connected state, and the glass liquid flows to the overflow brick through the platinum channel. The glass substrate with the platinum coating can solve the problem that a large amount of platinum defects occur on the glass substrate.
Description
Technical Field
The disclosure relates to the field of glass substrate production by utilizing platinum channels, in particular to a method for producing a glass substrate by utilizing platinum channels.
Background
At present, in the field of overflow glass substrate production, in an initial temperature-rise heating stage of a platinum channel, due to the fact that temperature-rise time is long and glass liquid does not flow in the platinum channel, a large amount of platinum crystallization crystals can be precipitated in the tube wall of the platinum channel, when the glass liquid flows through the tube wall, the platinum crystallization crystals are brought into the glass liquid, the glass liquid finally flows to an overflow brick and then pollutes the overflow brick, and when the glass substrate is produced, a large amount of platinum defects occur on the F surface of the glass substrate (the glass liquid flows downwards through two sides of the overflow brick, the glass liquid on the two sides is converged together at the lower end of the overflow brick, and the converging surface is the F surface), and the platinum defects can last for more than two months.
Disclosure of Invention
The invention aims to provide a method for producing a glass substrate by utilizing a platinum channel, which can solve the problem that the F surface of the glass substrate has platinum defects due to platinum crystallization in the platinum channel in the prior art.
In order to achieve the above object, the present disclosure provides a method for producing a glass substrate using a platinum channel, wherein the platinum channel sequentially comprises a lifting section, a fining section, a first cooling section, a stirring section, a second cooling section, and a feeding section, the lifting section is connected to a furnace, the feeding section has a feeding port at the bottom, and the feeding port is communicated with an overflow brick, the method comprises: the method comprises a pre-washing step, a discharging step and a normal feeding step, wherein in the pre-washing step, the feeding port and the overflow brick are in an unconnected state, so that molten glass from a kiln can sequentially pass through the lifting section, the clarifying section, the first cooling section, the stirring section, the second cooling section and the feeding section and can be discharged through the feeding port for N days, wherein N is more than or equal to 1 and less than or equal to 10; and stopping feeding the kiln after the feeding port discharges materials for N days, entering the discharging step after the feeding port stops discharging materials, discharging the residual molten glass in the platinum channel for M days in the discharging step, wherein M is more than or equal to 1 and less than or equal to 10, connecting and communicating the feeding port and the overflow bricks, and continuously feeding materials into the kiln. And after the residual glass in the platinum channel is discharged, entering the normal feeding step, wherein in the normal feeding step, the feeding port and the overflow brick are in a connected state, and the molten glass flows to the overflow brick through the platinum channel.
Optionally, the bottom of the stirring section is provided with a drain opening capable of being blocked, the second cooling section is obliquely arranged and gradually rises towards a direction far away from the stirring section, the drain opening is blocked in the pre-washing step and the normal feeding step, and the drain opening is opened in the discharging step.
Optionally, an L-shaped liquid guide pipe is arranged between the feed port and the overflow brick, in the pre-flushing step, the feed port and the L-shaped liquid guide pipe are in an unconnected state, and in the discharging step and the normal feeding step, the feed port and the L-shaped liquid guide pipe are in a connected state.
Alternatively, N is greater than M,2 ≦ N ≦ 4,1 ≦ M ≦ 3.
Optionally, before the kiln is charged, the discharge opening is blocked in advance, and the feed opening is disconnected with the L-shaped liquid guide pipe.
Optionally, in the pre-washing step, the charging amount of the kiln is adjusted according to the real-time discharge amount of the feeding port so as to control the real-time discharge amount to be balanced with the target discharge amount.
Optionally, the formula for calculating the real-time discharge amount is as follows: and the real-time discharge amount kg/h = the weight of the molten glass 3600 s/material receiving time s.
Optionally, the relationship between the discharge amount and the feeding amount conforms to a formula: target blowdown amount = kiln charge amount glass yield.
Optionally, the target discharge amount is 150kg/h to 250kg/h.
Optionally, the criterion for controlling the balance between the real-time blowdown amount and the target blowdown amount is as follows: and controlling the deviation between the real-time material discharge amount and the target material discharge amount not to exceed 5kg/h.
According to the technical scheme, namely the method for producing the glass substrate by using the platinum channel, provided by the disclosure, the flowing glass liquid can be used for washing away the platinum crystallization in the platinum channel, and the platinum crystallization and the glass liquid are discharged together through the discharge of the feeding port. Specifically, when the raw materials added into the kiln are melted at high temperature to form molten glass, the molten glass flows through the lifting section, the clarifying section, the first cooling section, the stirring section, the second cooling section and the feeding section, platinum crystals attached to the tube walls in the sections are washed away, then the molten glass with the platinum crystals flows to the feeding section, a feeding port at the bottom of the feeding section is communicated with the overflow brick during normal operation, during pre-washing, the feeding port and the overflow brick are not communicated, so that the molten glass with the platinum crystals is discharged from the feeding port, considering that the viscosity of the molten glass is high, the flow rate is slow, and the washing effect needs to be ensured, the discharging time is generally 3 to 7 days, for example, after 5 days of discharging, feeding in the kiln is stopped, and simultaneously the feeding port continues discharging, so that most of the molten glass in the platinum channel is discharged through the feeding port, thereby completing the pre-washing operation of each section. After that, namely after the material feeding port stops discharging, the material discharging port of the stirring section is opened to discharge the molten glass in the stirring section, then the material feeding port and the overflow brick are communicated, the furnace starts to feed, specifically, the material discharging amount is small because the material discharging port of the stirring section discharges the residual molten glass in the channel, the material discharging time is generally 2 to 3 days, for example, after 2 days of material discharging, the material discharging port is blocked by the blocking brick, so that the liquid level of the glass in the stirring section gradually rises, and after flowing to the material feeding section, the glass enters the overflow brick through the L-shaped liquid guide pipe and starts normal feeding.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic view of a platinum channel structure of a method for producing a glass substrate using the platinum channel according to an exemplary embodiment of the present disclosure.
Description of the reference numerals
1-a kiln; 2-a lifting section; 3-a clarification section; 4-a first cooling stage; 5-stirring section; 6-discharging port; 7-a second cooling section; 8-a feeding section; 9-a feedwell; a 10-L shaped catheter; 11-an overflow brick; 12-plug brick.
Detailed Description
The following detailed description of the embodiments of the disclosure refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, the use of directional terms such as "inner and outer" refers to inner and outer relative to the profile of the component or structure itself, unless stated to the contrary.
According to the method for producing the glass substrate by using the platinum channel provided by the present disclosure, referring to fig. 1, the platinum channel comprises a lifting section 2, a clarifying section 3, a first cooling section 4, a stirring section 5, a second cooling section 7 and a feeding section 8 in sequence, the lifting section 2 is connected to a furnace 1, the bottom of the feeding section 8 is provided with a feed opening 9, the feed opening 9 is communicated with an overflow brick 11, and the method comprises the following steps: the method comprises a pre-washing step, a discharging step and a normal feeding step, wherein in the pre-washing step, a feeding port 9 and an overflow brick 11 are in an unconnected state, so that molten glass from a kiln 1 can sequentially pass through a lifting section 2, a clarifying section 3, a first cooling section 4, a stirring section 5, a second cooling section 7 and a feeding section 8 and be discharged through the feeding port 9 for N days, wherein N is more than or equal to 1 and less than or equal to 10; and stopping feeding the kiln 1 after discharging the materials from the feeding port 9 for N days, entering the discharging step after discharging the materials from the feeding port 9, discharging the residual molten glass in the platinum channel for M days in the discharging step, wherein M is more than or equal to 1 and less than or equal to 10, connecting and communicating the feeding port 9 and the overflow bricks 11, and continuously feeding the materials into the kiln 1. After the residual glass in the platinum channel is discharged, the normal feeding step is carried out, in the normal feeding step, the feeding port 9 and the overflow brick 11 are in a connection state, and the molten glass flows to the overflow brick 11 through the platinum channel.
According to the technical scheme, namely the method for producing the glass substrate by using the platinum channel, provided by the disclosure, the platinum crystallization in the platinum channel can be washed away by using the glass liquid, and the platinum crystallization and the glass liquid are discharged together by using the discharge mode of the feed opening 9, so that the overflow brick is prevented from being polluted by the platinum crystallization, and the defect of glass platinum is avoided in the subsequent production.
Specifically, when the raw materials added into the kiln 1 are melted at high temperature and formed into molten glass, the molten glass flows through the lifting section 2, the clarifying section 3, the first cooling section 4, the stirring section 5, the second cooling section 7 and the feeding section 8, platinum attached to the tube wall in each section is devitrified and washed away, then the molten glass with platinum devitrified flows to the feeding section 8, the feed port 9 at the bottom of the feeding section 8 is communicated with the overflow brick 11 during normal operation, and during pre-washing, the feed port 9 and the overflow brick 11 are in an unconnected state, so that the molten glass with platinum devitrified is discharged from the feed port 9, and considering that the molten glass has high viscosity and low flow rate and the washing effect needs to be ensured, the discharge time is generally 3 to 7 days, for example, after 5 days of discharge, the feeding in the kiln 1 is stopped, and the feed port 9 continues to discharge, so that most of the molten glass in the platinum passage is discharged through the feed port 9, thereby completing the pre-washing operation of each section. After that, namely after the feed opening 9 stops discharging, the discharge opening 6 of the stirring section 5 is opened to discharge the molten glass in the stirring section 5, and then, after the feed opening 9 and the overflow brick 11 are connected, the furnace 1 will start charging, specifically, since the discharge of the stirring section 5 discharges the residual molten glass in the channel, the discharge amount is small, the discharge time is generally 2 to 3 days, for example, after 2 days, the discharge opening 6 will be blocked by the blocking brick 12, so that the molten glass in the stirring section 5 gradually rises and flows to the feed section 8, then enters the overflow brick 11 through the L-shaped liquid guide pipe 10 and starts normal production.
In some embodiments, referring to fig. 1, the bottom of the stirring section 5 has a closable discharge opening 6, the second cooling section 7 is disposed obliquely and gradually rises in a direction away from the stirring section 5, the discharge opening 6 is closed in the pre-washing step and the normal feeding step, and the discharge opening 6 is opened in the discharging step. Like this, can arrange the material when needs, can open drain 6 for the glass liquid in the stirring section 5 is discharged through drain 6, and the second cooling zone 7 that the slope set up simultaneously can pass through the slope with inside glass liquid and flow back to the stirring section 5 in, discharges it through drain 6, in order to realize arranging the material step. In addition, the discharge opening 6 can be blocked in any way, for example, as shown in fig. 1, the discharge opening 6 can be blocked by a plug brick 12, when the discharge opening 6 is blocked, the liquid level gradually rises to flow to the second cooling section 7 and then enters the feeding section 8 after the glass liquid flows into the stirring section 5, and thus, the pre-washing step and the normal feeding step can be realized.
The connection between the feedwell and the overflow brick may be in any suitable way, for example, as shown in fig. 1, an L-shaped liquid guide tube 10 is arranged between the feedwell 9 and the overflow brick 11, the feedwell 9 and the L-shaped liquid guide tube 10 are in a non-communicating state during the pre-flush step, and the feedwell 9 and the L-shaped liquid guide tube 10 are in a communicating state during the discharge step and the normal feed step. Specifically, the overflow brick 11 disposed in the muffle is fixedly connected to the L-shaped liquid guide tube 10, and in the discharging step and the normal feeding step, in order to connect the L-shaped liquid guide tube 10 to the feed opening 9 in a butt joint manner, the muffle may be moved to a corresponding position, so that the L-shaped liquid guide tube 10 fixedly connected to the overflow brick 11 will be connected to the feed opening 9 in a butt joint manner, so as to realize normal feeding of the feed opening 9.
The discharge time of the feed opening 9 and the discharge opening 6 can be set arbitrarily and suitably according to actual requirements, for example, the discharge time N of the feed opening 9 is greater than the discharge time M of the discharge opening 6, i.e. N is greater than or equal to 2 and less than or equal to 4, and M is greater than or equal to 1 and less than or equal to 3. Since the discharging of the feeding port 9 is a washing step, the discharging amount is large, and the discharging of the discharging port 6 is a discharging step after washing, the discharging amount is small, so the discharging time of the feeding port 9 is longer than that of the discharging port 6. Therefore, the washing effect can be improved, and simultaneously, the glass liquid in the platinum channel is completely discharged, so that the stable production of the follow-up glass is ensured.
In some embodiments, before the kiln 1 is charged, the discharge opening 6 is blocked in advance, and the feed opening 9 is disconnected from the L-shaped liquid guide tube 10. Specifically, for example, the discharge opening 6 may be blocked while the molten glass in the furnace 1 flows through the fining section 3 or before the molten glass flows into the stirring section 5, but in view of safety, it is preferable to block the discharge opening 6 before the charging of the furnace 1, and after the discharge opening 6 is blocked, the glass level in the stirring section 5 is gradually raised, and before the glass flows into the feeding section 8, the feed opening 9 is disconnected from the L-shaped liquid guide tube 10 to prepare for the feed opening discharge.
In the pre-washing step, the feeding amount of the kiln 1 can be adjusted according to the real-time discharging amount of the feeding port 9, so as to control the real-time discharging amount to be balanced with the target discharging amount. Specifically, the glass liquid discharged from the supply port 9 within a period of time needs to be received and taken for weighing according to the real-time discharging amount, the weighing frequency and the receiving time can be determined according to actual requirements, generally weighing is carried out for 1 to 2 times per hour, and the receiving time is 10s to 40s every time, so that the discharging difference between the discharging amount and the target discharging amount can be confirmed in real time to control the charging amount of the kiln 1, and the real-time discharging amount and the target discharging amount are relatively balanced. In addition, the target amount of the bleed may be set to 150kg/h to 250kg/h, and specifically, for example, when the target amount of the bleed is too large, the glass flow rate per unit time may be too large, and the excessive flow rate may cause an impact on the platinum passage, possibly causing a breakage or deformation of the platinum.
The basic feeding amount of the kiln can be converted according to the target discharging amount, and specifically, the formula is as follows: target blowdown amount = kiln charge amount glass yield. The glass yield can be calculated according to different raw material formulas, and because the process of forming the glass raw material into the molten glass after being heated at high temperature is a chemical reaction process, gas and water can be generated, and partial loss of the glass raw material can be caused, the glass yield can be calculated according to the raw material formulas and then the glass yield is substituted into a formula to calculate the feeding amount of the kiln.
In order to calculate the real-time discharge amount conveniently, a formula can be used for calculation, and the following formula is: and the real-time discharging amount kg/h = the weight of the molten glass 3600 s/receiving time s. The weight of the glass liquid is the weight of each weighing, and after the weight is multiplied by 3600 seconds (namely one hour), the weight of the glass liquid received within a period of time needs to be divided by the receiving time finally, so that the real-time material discharge amount per hour can be calculated.
The standard for balancing the real-time discharge amount and the target discharge amount is as follows: and controlling the deviation between the real-time discharge amount and the target discharge amount not to exceed 5kg/h. Therefore, the glass liquid level in the platinum channel can be kept, the glass liquid can stably and effectively wash platinum for crystallization, and meanwhile, the problems that the glass liquid level is too low or too high, washing is insufficient, or the flow is too large, so that platinum is damaged can be prevented.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A method for producing a glass substrate by using a platinum channel, wherein the platinum channel comprises a lifting section (2), a clarifying section (3), a first cooling section (4), a stirring section (5), a second cooling section (7) and a feeding section (8) in sequence, the lifting section (2) is connected to a kiln (1), the bottom of the feeding section (8) is provided with a feeding port (9), and the feeding port (9) is communicated with an overflow brick (11), the method is characterized by comprising the following steps: a pre-washing step, a discharging step and a normal feeding step,
in the pre-washing step, the feeding port and the overflow brick are in an unconnected state, so that molten glass from a kiln can sequentially pass through the lifting section (2), the clarifying section (3), the first cooling section (4), the stirring section (5), the second cooling section (7) and the feeding section (8) and be discharged through the feeding port (9) for N days, wherein N is more than or equal to 1 and less than or equal to 10;
stopping feeding the kiln after discharging for N days from the feeding port (9), entering a discharging step after discharging from the feeding port (9), discharging the residual molten glass in the platinum channel for M days in the discharging step, wherein M is more than or equal to 1 and less than or equal to 10, connecting and communicating the feeding port (9) and the overflow brick (11), and continuously feeding the molten glass into the kiln (1);
and after the residual glass in the platinum channel is discharged, entering the normal feeding step, wherein in the normal feeding step, the feeding port (9) and the overflow brick (11) are in a connected state, and the molten glass flows to the overflow brick (11) through the platinum channel.
2. The method for producing a glass substrate using a platinum channel as defined in claim 1, wherein said stirring section (5) has a closable drain opening (6) at the bottom, said second cooling section (7) is disposed obliquely and is gradually raised in a direction away from said stirring section (5), said drain opening (6) is closed in said pre-rinsing step and said normal feeding step, and said drain opening is opened in said discharging step.
3. A method for producing a glass substrate using a platinum channel according to claim 1, wherein an L-shaped liquid guide tube (10) is provided between the supply port (9) and the overflow brick (11), the supply port (9) and the L-shaped liquid guide tube (10) are in an unconnected state in the pre-washing step, and the supply port (9) and the L-shaped liquid guide tube (10) are in a connected state in the discharging step and the normal supply step.
4. The method for producing a glass substrate using a platinum channel as claimed in claim 1, wherein N is larger than M, 3. Ltoreq. N.ltoreq.7, 1. Ltoreq. M.ltoreq.3.
5. The method for producing a glass substrate using a platinum channel as defined in claim 2, wherein the discharge opening (6) is blocked in advance before the charging of the furnace (1) and the supply opening (9) is disconnected from the L-shaped liquid guide tube (10).
6. The method for producing a glass substrate using a platinum channel according to any one of claims 1 to 5, wherein in the pre-rinsing step, the charging amount of the furnace (1) is adjusted according to the real-time blowdown amount of the feedwell (9) to control the real-time blowdown amount to be balanced with the target blowdown amount.
7. The method for producing a glass substrate using a platinum channel as set forth in claim 6, wherein the calculation formula of the real-time blowdown amount is: and the real-time discharging amount kg/h = the weight of the molten glass 3600 s/receiving time s.
8. The method for producing a glass substrate using a platinum channel according to claim 6, wherein a relationship between the amount of the bleed and the amount of the feed is in accordance with a formula: target blowdown amount = kiln charge amount glass yield.
9. The method for producing a glass substrate using a platinum channel according to claim 6, wherein the target amount of bleed is 150kg/h to 250kg/h.
10. The method for producing a glass substrate by using a platinum channel as claimed in claim 6, wherein the standard for controlling the balance between the real-time blowdown amount and the target blowdown amount is as follows: and controlling the deviation between the real-time material discharge amount and the target material discharge amount not to exceed 5kg/h.
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| CN114436508B (en) * | 2022-02-24 | 2023-12-12 | 彩虹显示器件股份有限公司 | Preparation method of plate glass capable of avoiding platinum defects |
| CN115124219B (en) * | 2022-07-19 | 2023-10-20 | 河北光兴半导体技术有限公司 | Method for eliminating glass defects |
| CN115490412B (en) * | 2022-08-16 | 2023-12-12 | 河北光兴半导体技术有限公司 | Method for eliminating glass calculus |
| CN115974367A (en) * | 2022-12-20 | 2023-04-18 | 甘肃旭盛显示科技有限公司 | Glass production method and glass production device |
| CN115974368A (en) * | 2022-12-20 | 2023-04-18 | 甘肃旭盛显示科技有限公司 | Glass production method and glass production device |
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