CN111662003B - Single-piece non-heat-insulation refractory glass and processing method thereof - Google Patents
Single-piece non-heat-insulation refractory glass and processing method thereof Download PDFInfo
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- CN111662003B CN111662003B CN202010720846.8A CN202010720846A CN111662003B CN 111662003 B CN111662003 B CN 111662003B CN 202010720846 A CN202010720846 A CN 202010720846A CN 111662003 B CN111662003 B CN 111662003B
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
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- 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 single-piece non-heat-insulation refractory glass and a processing method thereof, wherein the processing method comprises the following steps: s1, preprocessing: cutting the glass substrate, and then carrying out fine grinding treatment; s2, heating treatment: placing the finely ground glass substrate into a tempering furnace for rapid heating at 680-780 ℃ for 120-380 seconds; s3, high-pressure treatment: the glass substrate subjected to heating treatment enters a 5-60 kPa air pressure condition at a conveying speed of 220-400 mm/S, and is simultaneously subjected to dry ice vaporization gas treatment, wherein the treatment time is not more than 3.5S, so that the temperature of the glass substrate is reduced by about 100-350 ℃; s4, the wind pressure at the stage is 60-70% of the wind pressure at the high-pressure treatment stage; the treatment time is not more than 7.5S, and the temperature of the glass substrate is reduced by about 50-150 ℃; and S5, cooling. The method has simple steps and low raw material cost, and the obtained single-piece non-heat-insulating refractory glass has excellent mechanical property and fire resistance.
Description
Technical Field
The invention relates to the technical field of refractory glass production, in particular to a method for processing single-piece non-heat-insulation refractory glass.
Background
Fire-resistant glass is a special glass that maintains its integrity and thermal insulation under standard fire test conditions and can be classified in different ways. At present, they are classified into A-type, B-type and C-type according to their fire resistance properties. The structure can be divided into four types: laminated composite fire-proof glass, wired fire-proof glass, hollow fire-proof glass and high-strength single-sheet fire-proof glass. Most of fireproof glass in the current market is sandwich fireproof glass which has good heat insulation, sound insulation and pressure resistance, but has the defects of poor weather resistance, heavy volume and inconvenience for further deep processing; the single-piece fireproof glass has the advantages of portability, easy deep processing (such as film coating, hollowing and the like), ultraviolet resistance, aging resistance and long service life, and has a market position which is difficult to replace. However, the current single-sheet fireproof glass usually mainly comprises cesium potassium glass or borosilicate glass, and the preparation of the single-sheet fireproof glass needs two processes of chemical toughening and physical toughening, so that the single-sheet fireproof glass has the disadvantages of high raw material cost, complex process, low productivity and high market price, and the waste liquid generated in the production process has serious environmental pollution and does not accord with the current industrial development trend of advocating environmental friendliness.
Therefore, the existing single-sheet fireproof glass technology needs to be further optimized.
Disclosure of Invention
Aiming at the technical problems, the invention provides a processing method for preparing single-piece non-heat-insulation refractory glass by adopting a pure physical tempering method, which not only simplifies the processing method of the single-piece refractory glass, reduces the cost of raw materials, improves the production efficiency, realizes streamlined operation, but also obviously improves the fire resistance of the single-piece refractory glass.
The technical scheme provided by the invention is as follows:
a method of processing a single sheet of non-insulating refractory glass comprising the steps of:
s1, preprocessing: cutting the glass substrate, and then carrying out fine grinding treatment;
optionally, the glass substrate is made of float glass above automobile grade, preferably ultra-white glass. Existing float glass can be classified into architectural grade, automotive grade, and mirror making grade. The ultra-white glass is ultra-transparent low-iron glass, has the advantages of light transmittance of over 91.5 percent, low spontaneous explosion rate and the like, and the prepared single-piece non-heat-insulating refractory glass has better comprehensive performance.
Alternatively, the finish grinding process of the glass substrate is a chamfering process, a round edge process or a round corner process. The fine grinding treatment of the glass substrate eliminates flaws on the side edge of the glass, avoids self-explosion of the glass caused by the existence of the flaws in the physical tempering process, improves the highest surface prestress borne by the glass in the tempering process, and can be matched with subsequent steps to produce high-performance single-piece non-heat-insulation refractory glass.
S2, heating treatment: placing the finely ground glass substrate into a tempering furnace for rapid heating at 680-780 ℃ for 120-380 seconds;
s3, high-pressure treatment: feeding the glass substrate subjected to heating treatment into a pressure condition of 5-60 kPa at a conveying speed of 220-600 mm/S, and simultaneously introducing dry ice vaporized gas, wherein the treatment time is not more than 3.5S, so that the temperature of the glass substrate is reduced by about 100-350 ℃;
s4, secondary high-pressure treatment: then, the glass substrate enters a secondary high-pressure environment at the same speed, and the wind pressure at the stage is 60-70% of that at the high-pressure treatment stage; the treatment time is not more than 7.5S, and the temperature of the glass substrate is reduced by about 50-150 ℃;
in the scheme, the glass substrate is heated to 680-780 ℃, the internal stress of the glass is eliminated, and when rapid high-pressure quenching treatment is carried out, under the condition of 5-60 kPa wind pressure, the inner layer and the outer layer of the glass generate great temperature difference, the surface of the glass shrinks, but the inner layer does not shrink, so that the surface layer of the glass shrinks and is restrained by the inner layer, the surface layer receives tensile stress, and the inner layer forms compressive stress; when rapid sub-high pressure quenching treatment is carried out, the air pressure is reduced by 30-40%, the surface layer of the glass is further cooled and contracted, and the temperature difference between the surface layer and the inner layer is larger, so that the tensile stress of the surface layer is increased; in the subsequent cooling process, the inner layer is cooled and contracted, and is restrained by the cooled outer layer, so that the surface layer generates great compressive stress, the inner layer forms tension, and the fireproof glass is formed, so that the fireproof glass has higher mechanical strength and thermal stability for resisting external impact and the like.
Through high-pressure quenching and secondary high-pressure quenching, the glass is rapidly cooled twice, larger surface stress is accumulated between the inner layer and the outer layer of the glass, and the mechanical property and the fire resistance of the glass are improved. Meanwhile, the problem that the glass breakage rate is improved due to too much temperature reduction in a short time is avoided.
In the high-pressure quenching treatment process, the cooling speed of the dry ice vaporized gas is high, so that uniform low-temperature cold air is provided for the surface of the glass, the glass is rapidly and uniformly cooled integrally, the temperature and the wind pressure of each part on the surface of the glass are kept consistent, and the formation of stress spots or the breakage of the glass are avoided; also, since the dry ice gas is C0 2 The dry ice gas is a gas with stable chemical properties, and can avoid the oxidation of the surface of the glass in the treatment process, so the treatment of the dry ice gas can improve the quality and the qualification rate of finished glass.
Preferably, a dry ice gas spray head and a gas recovery port connected with a gas recovery pipeline are arranged in the high-pressure air grid area, the gas recovery port is arranged along the bottom, so that the used heated mixed gas can be recovered in time, and the dry ice gas spray head continuously supplies low-temperature dry ice gas.
S5, cooling treatment: and cooling the glass substrate to room temperature to obtain the single-piece non-heat-insulating refractory glass.
Preferably, the cooling treatment is: transferring the glass to an annealing furnace at 250-450 ℃, and gradually cooling to 100 ℃; then cooling to normal temperature under the condition of room temperature.
The invention also provides a single piece of non-heat-insulation refractory glass which is prepared by the processing method. The granularity, the surface compressive stress and the fire resistance of the single-piece non-heat-insulating refractory glass are greatly improved.
The processing method of the single piece of non-heat-insulation refractory glass provided by the embodiment of the invention has the following beneficial effects:
the invention provides a pure physical tempering method, which has simple process steps, omits the chemical treatment step of the existing physical and chemical tempering, can realize streamlined operation and has high production efficiency; chemical treatment liquid is saved from the raw materials, so that the production cost is greatly reduced; through unique high-pressure quenching and secondary high-pressure quenching treatment, the glass substrate is rapidly cooled twice, and great surface stress is accumulated between the inner layer and the outer layer of the glass, so that the prepared fireproof glass has excellent mechanical property and fire resistance, is obviously higher than that of the existing single fireproof glass, and has higher weather resistance, light transmittance and safety. In addition, the glass processing method of the invention also has the advantage of environmental protection which is not possessed by the chemical tempering method.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the embodiments of the present invention, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
A method of processing a single sheet of non-insulating refractory glass comprising the steps of:
s1, pretreatment: cutting an ultra-white glass substrate with complete surface and thickness of 6mm, then carrying out fine grinding treatment, carrying out round edge treatment on the edge of the glass substrate, and then cleaning and drying the glass substrate;
s2, heating treatment: placing the finely ground glass substrate into a tempering furnace for rapid heating at 780 ℃ for 120S;
s3, high-pressure treatment: the glass substrate after heating treatment enters the condition of 60kPa wind pressure at the conveying speed of 400mm/s, and is treated by dry ice vaporized gas at the same time, so that the temperature of the glass substrate is reduced by about 350 ℃; s4, secondary high-pressure treatment: then, the glass substrate enters a secondary high-pressure environment at the same speed, and the wind pressure at the stage is 70% of that at the high-pressure treatment stage; the processing time is 4S, and the temperature of the glass substrate is reduced by about 50 ℃;
s5, cooling treatment: transferring the glass to an annealing furnace at 250 ℃, and gradually cooling to 100 ℃; and then cooling to normal temperature under the condition of room temperature to obtain the single-piece non-heat-insulating refractory glass.
Example 2
A method of processing a single sheet of non-insulating refractory glass comprising the steps of:
s1, preprocessing: cutting an ultra-white glass substrate with the complete surface and the thickness of 7mm, then carrying out fine grinding treatment, carrying out round edge treatment on the edge of the glass substrate, and then cleaning and drying the glass substrate;
s2, heating treatment: placing the finely ground glass substrate into a tempering furnace for rapid heating at 700 ℃, and treating for 250S;
s3, high-pressure treatment: the glass substrate after heat treatment enters the condition of 30kPa air pressure at the conveying speed of 300mm/S, and is treated by dry ice vaporized gas at the same time, the treatment time is 2S, so that the temperature of the glass substrate is reduced by about 150 ℃;
s4, secondary high-pressure treatment: then, the glass substrate enters a secondary high-pressure environment at the same speed, and the air pressure at the stage is 65% of that at the high-pressure treatment stage; the treatment time is 5.5S, and the temperature of the glass substrate is reduced by about 100 ℃;
s5, cooling treatment: transferring the glass to an annealing furnace at 300 ℃, and gradually cooling to 100 ℃; and then cooling to normal temperature under the condition of room temperature to obtain the single-piece non-heat-insulating refractory glass.
Example 3
A method of processing a single sheet of non-insulating refractory glass comprising the steps of:
s1, pretreatment: cutting an ultra-white glass substrate with the complete surface and the thickness of 8mm, then carrying out fine grinding treatment, carrying out round edge treatment on the edge of the glass substrate, and then cleaning and drying the glass substrate;
s2, heating treatment: placing the finely ground glass substrate into a tempering furnace for rapid heating at 680 ℃, and processing for 350S;
s3, high-pressure treatment: the glass substrate subjected to heat treatment enters a 10kPa air pressure condition at a conveying speed of 220mm/S, and is treated by dry ice vaporized gas at the same time, wherein the treatment time is 3S, so that the temperature of the glass substrate is reduced by about 100 ℃;
s4, secondary high-pressure treatment: then, the glass substrate enters a secondary high-pressure environment at the same speed, and the wind pressure at the stage is 60% of that at the high-pressure treatment stage; the treatment time is 7.5S, and the temperature of the glass substrate is reduced by about 50 ℃;
s5, cooling treatment: transferring the glass to an annealing furnace at 450 ℃, and gradually cooling to 100 ℃; and then cooling to normal temperature under the condition of room temperature to obtain the single-piece non-heat-insulating refractory glass.
Comparative example 1
The comparative example adopts the existing chemical toughening method to prepare the cesium-potassium single-sheet non-heat-insulation refractory glass, and is prepared according to the following method:
100kg of potassium chloride, 2kg of sodium nitrate, 1kg of cesium nitrate, 0.5kg of methylcellulose and 0.05kg of La were mixed at 25 ℃ to prepare a mixture 2 O 3 And 50kg of water are uniformly mixed to prepare the cesium potassium salt coating solution.
Heating 6mm of ultra-white glass to 650 ℃, spraying the cesium potassium salt coating solution on the heated glass to enable the spraying thickness to be 1mm, keeping the temperature for 250s, and then cooling at a cooling rate of 125 ℃/min to obtain the cesium potassium monolithic non-heat-insulating refractory glass.
Comparative example 2
This comparative example differs from example 1 in that: the sub-high pressure treatment step was omitted, and the other steps were the same as in example 1.
Comparative example 3
This comparative example differs from example 1 in that: the dry ice vaporization gas treatment in the high-pressure treatment was omitted, and the other treatment methods were the same as in example 1.
Test examples
According to GB15763.1-2009 part 1 of safety glass for buildings: fire-resistant glass, the performance of the fire-resistant glass prepared in examples 1 to 3 and comparative examples 1 to 3 was tested, and the test results are shown in Table 1.
TABLE 1 test results of the properties of the fire resistant glass
From the above test results, it can be seen that the refractory integrity time, compressive stress, and number of fragments per unit area of the single non-insulating refractory glass prepared by the present invention are much higher than those of comparative examples 1 to 3, which indicates that the refractory performance and safety of the refractory glass are greatly improved.
It should be understood that the technical solutions and concepts of the present invention may be equally replaced or changed by those skilled in the art, and all such changes or substitutions should fall within the protection scope of the appended claims.
Claims (4)
1. A method of processing a single sheet of non-insulating refractory glass, comprising the steps of:
s1, preprocessing: cutting the glass substrate, and then carrying out fine grinding treatment;
s2, heating treatment: placing the finely ground glass substrate into a tempering furnace for rapid heating at 680-780 ℃ for 120-380S;
s3, high-pressure treatment: feeding the glass substrate subjected to heating treatment into a pressure condition of 5-60 kPa at a conveying speed of 220-400 mm/S, and introducing dry ice vaporized gas, wherein the treatment time is not more than 3.5S, so that the temperature of the glass substrate is reduced by about 100-350 ℃;
s4, secondary high-pressure treatment: then, the glass substrate enters a secondary high-pressure environment at the same speed, and the wind pressure at the stage is 60-70% of that at the high-pressure treatment stage; the treatment time is not more than 7.5S, and the temperature of the glass substrate is reduced by about 50-150 ℃;
s5, the cooling treatment comprises the following steps: transferring the glass to an annealing furnace at 250-450 ℃, and gradually cooling to 100 ℃; then cooling to normal temperature under the condition of room temperature.
2. The method of claim 1, wherein the glass substrate is automotive grade or above float glass.
3. The method of claim 1, wherein the finishing process of the glass substrate is a chamfering process, a round edge process or a round corner process.
4. A monolithic non-insulating refractory glass produced by the method of any one of claims 1 to 3.
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| CN202010253631X | 2020-04-01 | ||
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1519214A (en) * | 2003-09-02 | 2004-08-11 | 深圳市蛇口龙电安全技术研究有限公司 | Superbardness fire resisting glass as well as preparing method and special equipment |
| CN1693246A (en) * | 2005-02-21 | 2005-11-09 | 何志强 | Method for mfg. high strengthening environmental protection fireproof glass |
| CN101092286A (en) * | 2006-06-19 | 2007-12-26 | 福清市新福兴玻璃有限公司 | Method for producing fire-resisting glass and dedicated production equipment |
| CN104276769A (en) * | 2014-09-03 | 2015-01-14 | 宁波市合鑫玻璃科技有限公司 | Production process of Low-E (Low-Emissivity) laminated tempered glass by dry method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3578357B2 (en) * | 1994-04-28 | 2004-10-20 | 信越石英株式会社 | Method for producing heat-resistant synthetic quartz glass |
| JP3988211B2 (en) * | 1996-06-18 | 2007-10-10 | 東ソー株式会社 | Method for producing high purity transparent silica glass |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1519214A (en) * | 2003-09-02 | 2004-08-11 | 深圳市蛇口龙电安全技术研究有限公司 | Superbardness fire resisting glass as well as preparing method and special equipment |
| CN1693246A (en) * | 2005-02-21 | 2005-11-09 | 何志强 | Method for mfg. high strengthening environmental protection fireproof glass |
| CN101092286A (en) * | 2006-06-19 | 2007-12-26 | 福清市新福兴玻璃有限公司 | Method for producing fire-resisting glass and dedicated production equipment |
| CN104276769A (en) * | 2014-09-03 | 2015-01-14 | 宁波市合鑫玻璃科技有限公司 | Production process of Low-E (Low-Emissivity) laminated tempered glass by dry method |
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