CN114436508B - Preparation method of plate glass capable of avoiding platinum defects - Google Patents
Preparation method of plate glass capable of avoiding platinum defects Download PDFInfo
- Publication number
- CN114436508B CN114436508B CN202210178308.XA CN202210178308A CN114436508B CN 114436508 B CN114436508 B CN 114436508B CN 202210178308 A CN202210178308 A CN 202210178308A CN 114436508 B CN114436508 B CN 114436508B
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- Prior art keywords
- platinum
- glass
- channel
- volatile
- liquid
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title claims abstract description 268
- 229910052697 platinum Inorganic materials 0.000 title claims abstract description 133
- 230000007547 defect Effects 0.000 title claims abstract description 28
- 239000005357 flat glass Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims description 67
- 239000011521 glass Substances 0.000 claims description 54
- 239000000758 substrate Substances 0.000 claims description 7
- 239000006059 cover glass Substances 0.000 claims description 2
- 150000003057 platinum Chemical class 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 19
- 230000000630 rising effect Effects 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 3
- 238000004904 shortening Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Classifications
-
- 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
- C03B7/06—Means for thermal conditioning or controlling the temperature of the glass
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The invention provides a preparation method of plate glass for avoiding generating platinum defects, wherein in the heating process of a platinum channel, the temperature interval of the platinum channel is divided into a platinum non-volatile temperature interval and a platinum volatile temperature interval, the heating rate of the platinum channel in the platinum non-volatile temperature interval is controlled to be 3-6 ℃ per hour, and the heating rate of the platinum channel in the platinum volatile temperature interval is controlled to be 7-9 ℃ per hour. Greatly reduces the defect of platinum class formed by long-time empty pipe of the platinum channel in the heating process, and realizes the rapid reaching of the production line of the plate glass.
Description
Technical Field
The invention belongs to the field of substrate glass production, and relates to a preparation method of plate glass for avoiding generating platinum defects.
Background
In the starting process of a production line of substrate glass, a temperature rising process exists in a kiln channel, particularly a platinum channel has longer empty tube time before glass liquid enters, the platinum channel can be oxidized and volatilized in a long-time empty tube process from normal temperature to high temperature, high-temperature volatile matters are formed on the surface, and during normal production, the high-temperature volatile matters flow into a low-temperature area along with the glass liquid to be recrystallized to form platinum defects on a glass plate, so that the platinum defects can be reduced to normal level only after a certain period of time (generally at least 3 months), and the rapid achievement of the production line is greatly influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the preparation method of the plate glass, which avoids generating the platinum defects, greatly reduces the platinum defects formed by long-time empty tubes of a platinum channel in the temperature rising process, and realizes the rapid production of the plate glass production line.
The invention is realized by the following technical scheme:
in the process of heating up a platinum channel, the temperature interval of the platinum channel is divided into a platinum non-volatile temperature interval and a platinum volatile temperature interval, the temperature rising rate of the platinum channel in the platinum non-volatile temperature interval is controlled to be 3-6 ℃ per hour, and the temperature rising rate of the platinum channel in the platinum volatile temperature interval is controlled to be 7-9 ℃ per hour.
Preferably, the platinum is not volatile in the temperature range of room temperature to 1000 ℃.
Further, the platinum is volatile at a temperature ranging from 1000 ℃ to 1650 ℃.
Preferably, after the temperature of the platinum channel is raised, introducing glass liquid into the platinum channel, filling the platinum channel with the glass liquid for a preset time, and then reducing the liquid level of the glass liquid to the liquid line position of the platinum channel.
Further, the preset time is 24-36 h.
Preferably, the expansion amount of the platinum channel is released once in 1-1.5 hours during the temperature rising process of the platinum volatile temperature range.
Preferably, the plate glass is substrate glass.
Preferably, the plate glass is cover glass.
Compared with the prior art, the invention has the following beneficial effects:
in order to overcome the defect of the glass platinum, the invention shortens the heating blank pipe time of the platinum channel, heats the glass according to the normal heating rate in the temperature range of the platinum which is not easy to volatilize, and reduces the blank pipe time by increasing the heating rate in the temperature range of the platinum which is easy to volatilize, thereby effectively reducing the volatilization quantity of the platinum and Pt (individual) +O 2 (gas) ⇔ PtO 2 (gas); the invention greatly reduces the defect of platinum class formed by long-time blank pipe of the platinum channel in the heating process, realizes the rapid production of the flat glass production line, and has great significance for the standardization of the production line.
Further, after the glass liquid reaches the liquid surface line, the glass liquid is used for cleaning the platinum channel, then the glass liquid returns to the normal liquid surface again, the platinum defects generated by volatilization during the empty pipe can be quickly taken away through the glass liquid by the cleaning action, the platinum defects generated in the heating process are reduced to the normal level in the shortest time, and the substrate glass production line is quickly produced.
The invention is suitable for the production of special substrate glass such as LCD panel, and is also suitable for the production line of flat display cover plate glass.
Drawings
FIG. 1 is a schematic view of a platinum channel blank pipe in the process of producing sheet glass; (a) longitudinal cross section, (b) cross section.
FIG. 2 is a schematic view of the liquid surface line of a glass liquid reaching a platinum channel in the process of producing plate glass; (a) longitudinal cross section, (b) cross section.
FIG. 3 is a schematic view of the glass cleaning free space in the process of producing the plate glass of the invention; (a) longitudinal cross section, (b) cross section.
FIG. 4 is a schematic view of a normal liquid line in the process of producing a sheet glass according to the present invention; (a) longitudinal cross section, (b) cross section.
The reference numerals in the figures are: 1. platinum channel, 3 platinum volatile, 4 liquid line, 5 free space.
Detailed Description
For a further understanding of the present invention, the present invention is described below in conjunction with the following examples, which are provided to further illustrate the features and advantages of the present invention and are not intended to limit the claims of the present invention.
In order to avoid generating platinum defects, the invention designs two strategies: firstly, the heating empty pipe time of the platinum channel is shortened, and secondly, the platinum channel is cleaned by utilizing the glass liquid after the glass liquid reaches the liquid surface line.
For shortening the heating blank pipe time of the platinum channel, the heating interval process is divided into a platinum volatile temperature interval and a platinum non-volatile temperature interval, wherein the platinum non-volatile temperature interval is normal temperature-1000 ℃, and the platinum volatile temperature interval is 1000-1650 ℃. And the temperature rising rate of the platinum in a temperature zone where the platinum is not easy to volatilize is kept at a normal rate, the temperature rising rate is increased in a temperature zone where the platinum is easy to volatilize, the expansion management frequency of the platinum is required to be increased while the temperature rising rate is increased in a temperature zone where the platinum is easy to volatilize, and the expansion amount of the platinum channel is released once within 1-1.5 hours after the temperature rising so as to prevent deformation. The heating rate is increased and the blank pipe time is reduced in the platinum volatile temperature range, so that the volatilization quantity of platinum (particles) can be effectively reduced, and the platinum can react and be oxidized when meeting oxygen in the platinum volatile temperature range, and Pt (individual) +O 2 (gas) ⇔ PtO 2 (gas).
The method for cleaning the platinum channel by using the glass liquid after the glass liquid reaches the liquid surface line means that the glass liquid is not allowed to stay after reaching the liquid surface line, and the glass liquid rises to the highest level at a time, namely the platinum channel is filled. After the platinum channel is filled with the glass liquid, the glass liquid needs to be maintained in a full state for 24-36 h. After the glass liquid is kept in a full state for 24-36 h, the glass liquid level is slowly reduced to a normal liquid level line.
As shown in fig. 1, platinum volatile 3 is formed on the wall of the platinum pipe under the condition of the empty pipe, after glass liquid reaches a liquid surface line 4 as shown in fig. 2, the part of the platinum volatile 3 submerged by the glass liquid is taken away by the molten glass liquid, but the platinum volatile 3 in the free space 5 still exists, the glass liquid is used for cleaning the platinum volatile in the free space of the platinum channel, the glass liquid is filled in the platinum channel as shown in fig. 3, the glass liquid is kept for 24-36 h, the glass liquid is lowered to a normal liquid surface line 4 again, a certain free space 5 exists at the upper part of the liquid surface line 4 in the normal production process as shown in fig. 4, and the platinum volatile 3 (platinum defects) generated by volatilization during the empty pipe can be quickly taken away by the glass liquid, so that the platinum volatile 3 (the platinum defects) generated during the temperature rising process can be reduced to a normal level in the shortest time.
The invention relates to a preparation method of plate glass for avoiding generating platinum defects, which specifically comprises the following steps:
in the heating process of the platinum channel, the temperature zone of the platinum channel is divided into a platinum non-volatile temperature zone and a platinum volatile temperature zone, the heating rate of the platinum channel in the platinum non-volatile temperature zone is controlled to be 3-6 ℃ per hour, and the heating rate of the platinum channel in the platinum volatile temperature zone is controlled to be 7-9 ℃ per hour. The temperature range of the platinum which is not easy to volatilize is between room temperature and 1000 ℃, and the temperature range of the platinum which is easy to volatilize is between 1000 ℃ and 1650 ℃.
And 2, introducing glass liquid into the platinum channel, maintaining the full state for 24-36 h after the platinum channel is full of the glass liquid, and then reducing the liquid level of the glass liquid to the liquid line position.
Example 1
In a certain production line, a platinum channel is heated to 1000 ℃ from room temperature at a rate of 3 ℃ per hour, then heated to 1650 ℃ from 1000 ℃ at a rate of 9 ℃ per hour, and the expansion amount of platinum is released once in 1 hour during the process of heating to 1650 ℃ from 1000 ℃; after the temperature rise is finished, introducing glass liquid into the platinum channel, maintaining the full state for 24 hours after the platinum channel is full of the glass liquid, and then reducing the liquid level of the glass liquid to the liquid surface line position.
Comparative example 1
The production line of example 1 was modified by heating the platinum channel from room temperature to 1650 ℃ at a rate of 3 ℃ per hour, and after the heating was completed, introducing glass liquid into the platinum channel to the liquid surface line position.
Example 2
In another production line, the platinum channel is heated from room temperature to 1000 ℃ at a rate of 6 ℃ per hour, then heated from 1000 ℃ to 1650 ℃ at a rate of 7 ℃ per hour, and the platinum expansion is released once for 1 hour during the process of heating from 1000 ℃ to 1650 ℃; after the temperature rise is finished, introducing glass liquid into the platinum channel, maintaining the full state for 36h after the platinum channel is full of the glass liquid, and then reducing the liquid level of the glass liquid to the liquid line position.
Comparative example 2
The production line of example 2 was modified by heating the platinum channel from room temperature to 1650 ℃ at a rate of 6 ℃ per hour, and after the heating was completed, introducing glass liquid into the platinum channel to the liquid surface line position.
The platinum rhodium defects of the examples and comparative examples were counted, and the results are shown in tables 1 and 2.
Table 1 platinum rhodium defects of example 1 and comparative example 1
TABLE 2 platinum rhodium defects of example 2 and comparative example 2
The results in tables 1 and 2 show that there is a significant reduction in platinum defects in several production lines after the use of the inventive method. With the application and optimization of the method, the trial production time is continuously shortened, the defects of glass are further reduced, and the effect is good.
According to the invention, by shortening the combination of the empty pipe time of the platinum channel and cleaning the free space of the platinum channel by the glass liquid, the platinum volatile matter 3 (platinum defects) formed by the long-time empty pipe of the platinum channel in the temperature rising process is effectively reduced, the rapid production of the substrate (cover plate) glass production line is realized, the production time is shortened from at least 3 months to 1 month, and the method has great significance in the standardization of the production line.
Claims (5)
1. The preparation method of the plate glass for avoiding the occurrence of the platinum defects is characterized in that in the heating process of a platinum channel, the temperature interval of the platinum channel is divided into a platinum non-volatile temperature interval and a platinum volatile temperature interval, the heating rate of the platinum channel in the platinum non-volatile temperature interval is controlled to be 3-6 ℃ per hour, and the heating rate of the platinum channel in the platinum volatile temperature interval is controlled to be 7-9 ℃ per hour; the temperature range of the platinum which is not easy to volatilize is between room temperature and 1000 ℃; the platinum volatile temperature range is 1000 ℃ to 1650 ℃;
after the temperature of the platinum channel is raised, introducing glass liquid into the platinum channel, filling the platinum channel with the glass liquid for a preset time, and then reducing the liquid level of the glass liquid to the liquid line position of the platinum channel.
2. The method for producing a sheet glass, which is free from occurrence of platinum defects, according to claim 1, wherein the preset time is 24 hours to 36 hours.
3. The method for producing a sheet glass for avoiding occurrence of platinum defects according to claim 1, wherein the expansion amount of the platinum channel is released once in 1 to 1.5 hours during the temperature rise in the platinum volatile temperature range.
4. The method for producing a sheet glass for avoiding occurrence of platinum defects according to claim 1, wherein the sheet glass is a substrate glass.
5. The method for producing a sheet glass avoiding occurrence of platinum defects according to claim 1, wherein the sheet glass is a cover glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178308.XA CN114436508B (en) | 2022-02-24 | 2022-02-24 | Preparation method of plate glass capable of avoiding platinum defects |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178308.XA CN114436508B (en) | 2022-02-24 | 2022-02-24 | Preparation method of plate glass capable of avoiding platinum defects |
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| Publication Number | Publication Date |
|---|---|
| CN114436508A CN114436508A (en) | 2022-05-06 |
| CN114436508B true CN114436508B (en) | 2023-12-12 |
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| CN202210178308.XA Active CN114436508B (en) | 2022-02-24 | 2022-02-24 | Preparation method of plate glass capable of avoiding platinum defects |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013216531A (en) * | 2012-04-06 | 2013-10-24 | Avanstrate Inc | Manufacturing method of glass plate and manufacturing apparatus of glass plate |
| CN113754247A (en) * | 2021-09-24 | 2021-12-07 | 芜湖东旭光电科技有限公司 | Method for producing glass substrate by utilizing platinum channel |
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2022
- 2022-02-24 CN CN202210178308.XA patent/CN114436508B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013216531A (en) * | 2012-04-06 | 2013-10-24 | Avanstrate Inc | Manufacturing method of glass plate and manufacturing apparatus of glass plate |
| CN113754247A (en) * | 2021-09-24 | 2021-12-07 | 芜湖东旭光电科技有限公司 | Method for producing glass substrate by utilizing platinum channel |
Non-Patent Citations (1)
| Title |
|---|
| 延长铂金通道使用寿命的措施探讨;李青等;电子玻璃技术2016;第78-80页 * |
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| CN114436508A (en) | 2022-05-06 |
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