CN114249531A - Preparation method of high silica glass solution capable of improving liquid level melting capacity - Google Patents
Preparation method of high silica glass solution capable of improving liquid level melting capacity Download PDFInfo
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- CN114249531A CN114249531A CN202111555539.XA CN202111555539A CN114249531A CN 114249531 A CN114249531 A CN 114249531A CN 202111555539 A CN202111555539 A CN 202111555539A CN 114249531 A CN114249531 A CN 114249531A
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- powder
- glass
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- high silica
- silica glass
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- 238000002844 melting Methods 0.000 title claims abstract description 38
- 230000008018 melting Effects 0.000 title claims abstract description 38
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000011521 glass Substances 0.000 claims abstract description 60
- 239000000843 powder Substances 0.000 claims abstract description 43
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 28
- 239000010446 mirabilite Substances 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 19
- 239000000156 glass melt Substances 0.000 claims abstract description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 16
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims description 16
- 239000006004 Quartz sand Substances 0.000 claims description 9
- 229910052656 albite Inorganic materials 0.000 claims description 9
- 229910021538 borax Inorganic materials 0.000 claims description 8
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 8
- 239000004327 boric acid Substances 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 8
- 235000017550 sodium carbonate Nutrition 0.000 claims description 8
- 239000004317 sodium nitrate Substances 0.000 claims description 8
- 235000010344 sodium nitrate Nutrition 0.000 claims description 8
- 239000004328 sodium tetraborate Substances 0.000 claims description 8
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000011812 mixed powder Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 11
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract description 8
- 235000011152 sodium sulphate Nutrition 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000011449 brick Substances 0.000 abstract description 4
- 238000011049 filling Methods 0.000 abstract description 4
- 239000002344 surface layer Substances 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 abstract 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Inorganic materials [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 abstract 2
- 235000010333 potassium nitrate Nutrition 0.000 abstract 2
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 239000011734 sodium Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002950 deficient Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
-
- 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
- C03B5/235—Heating the glass
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Compositions (AREA)
Abstract
A preparation method of high silica glass melt capable of improving the liquid level melting capacity is characterized in that mirabilite with the mass percentage of 0.10-0.50 is added into high silica glass powder to improve the melting capacity of the glass liquid level. At 884 ℃, sodium sulfate in mirabilite is melted, and because the melting amount of the sodium sulfate in the high silica glass is only 0.2%, the sodium sulfate which is not melted into the glass floats on the melted glass and is between the powder and the powder, and boils between the glass and the powder, thereby enhancing the heat conduction between the glass liquid and the powder and accelerating the melting of the powder. The invention strictly controls the addition of the mirabilite, avoids the occurrence of surface layer saltpeter water on the liquid surface of the glass, effectively avoids the phenomenon that the surface layer saltpeter water can burst when meeting water in the kiln, compensates the safety of the kiln, improves the melting performance of the liquid surface of the glass, thins a raw material layer, does not generate a filling material under the condition of not influencing the performance of the glass, reduces the erosion of brick materials of the kiln and improves the quality of the glass.
Description
Technical Field
The invention relates to the field of glass manufacturing, in particular to the field of high silica glass electric melting furnaces, and discloses a preparation method of high silica glass with good glass liquid level melting property.
Background
Compared with common glass, the high silica glass has stronger mechanical propertyThe material has good thermal stability, has high temperature resistance after special treatment, and is widely applied to the fields of aerospace and military. During the production process of the glass, B is contained in the components2O3The content is over 20 percent, and boron is seriously volatilized during high-temperature melting, so the glass melting is realized by heating the inside of the glass by utilizing the conductive characteristic of the glass in a high-temperature state instead of a flame kiln, namely, the glass is produced by adopting the electric melting cold top kiln technology.
When the electric melting cold top kiln technology is used for production, because of internal electric melting, the glass liquid level of the kiln can not be released in time due to thick raw material layers and internal bonding, and then the escaping gas is gathered to form small air holes to block heat conduction. The powder is accumulated on the liquid surface of the glass of the kiln to form a crust, and the melting of the powder on the upper layer is further hindered due to the occurrence of a fluffy material. If the temperature of the internal glass liquid is increased only by increasing the current, the strength of melting the glass liquid level is not increased greatly, and the temperature of the internal glass liquid is increased, so that the corrosion of the brick material of the kiln is aggravated, and the glass quality is seriously influenced.
In the invention and creation of CN102643022A and the invention and creation of CN103864295A, respectively, a preparation method of high silica glass is disclosed. The contents disclosed in the two inventions do not relate to the problem that the quality of glass is affected because the raw material layer on the liquid surface of the kiln glass is thick, powder is accumulated on the liquid surface of the kiln glass to form a hard shell, and the erosion of the brick material of the kiln is aggravated.
Disclosure of Invention
The method aims to solve the problems that the quality of glass is affected by the fact that the raw material layer is thick, the material is easy to be splashed, and the corrosion of the brick material of the kiln is aggravated when the high silica glass is produced by the electric melting cold top kiln technology. The invention provides a preparation method of high silica glass melt capable of improving the liquid level melting capacity.
The specific process of the invention is as follows:
step one, weighing powder:
the glass powder consists of 45.0-45.6% of quartz sand, 22.5-22.7% of borax, 21.9-22.5% of boric acid, 4.8-5.3% of albite, 2.3-2.6% of soda ash, 2.0-2.1% of sodium nitrate and 0.10-0.50% of mirabilite. The percentage is mass percentage.
The quartz sand and the albite are required to pass through 100 meshes completely; the borax, the boric acid, the soda ash, the sodium nitrate and the mirabilite are required to pass through 10 meshes.
Step two, mixing powder materials:
and starting the forced mixer. And (3) sequencing the weighed powder according to quartz sand, borax, boric acid, albite, soda ash, sodium nitrate and mirabilite, and sequentially putting the powder into a forced mixer with the rotating speed of 40-50 r/min from a feed inlet. And after the last powder is put into the mixing tank, continuously stirring for 10-20 min, and stopping stirring to obtain the mixed powder.
Step 3, melting high silica glass melt:
hoisting the material tank filled with the powder to an upper opening of a feeder; the feeder feeds the mixed powder to the front end above the liquid level of the kiln glass at the speed of 5 r/min.
And (3) electrically heating the powder added into the kiln, and melting at high temperature to obtain the high silica glass melt.
The temperature for melting the powder is 1400-1600 ℃.
The method is to add mirabilite into the glass powder to improve the melting capacity of the glass liquid level.
The chemical raw material selected by the invention is mirabilite, also called sodium sulfate decahydrate (Na)2SO4·10H2O), white fine crystalline or powdery, easily soluble in water, hygroscopic, odorless, and nontoxic. Because the mass percentage of the introduced mirabilite is only 0.10-0.50% of the batch, and the mirabilite also contains ten structural waters and is decomposed at high temperature, Na is introduced2SO4The glass is only 0.044-0.22% of the batch, and the influence on the glass components is basically negligible.
Adding Natrii sulfas (Na) into kiln2SO4·10H2O) ten structural waters (10H) are first lost at 32.38 DEG C2O), the structural water can stir the upper glass liquid when being gasifiedAnd is beneficial to melting. Sodium sulfate (Na) which loses structural water at 884 ℃2SO4) And melting, wherein the melting amount of sodium sulfate in the high silica glass is only 0.2%, and sodium sulfate which is not melted into the glass floats on the melted glass and is between the powder and the glass, so that the sodium sulfate is boiled between the glass and the powder, the heat conduction between the molten glass and the powder is enhanced, and the melting of the powder is accelerated.
Meanwhile, in order to ensure that the heat loss of the glass liquid surface is as low as possible and the phenomenon of material filling is avoided, the raw material layer of the glass liquid surface accounts for more than 60 percent. In addition, the melting amount of sodium sulfate in the high silica glass is only 0.2%, and when the melting amount exceeds 0.2%, glass liquid surface can generate saltwater, and at the moment, although the glass liquid surface is well melted, the saltwater on the surface layer can generate a burst phenomenon when meeting water in the kiln, so that the safety of the kiln is seriously influenced.
The invention comprehensively considers various factors, and only adds 0.10-0.50% of mirabilite (Na) in the production of the high silica glass2SO4·10H2O) can achieve the purpose: the thickness of the raw material layer is less than 15cm, the raw material layer accounts for more than 60% of the glass liquid surface, the phenomenon of material filling does not occur, and the defective glass accounts for less than 30%.
The data for the improvement in glass melting ability after the addition of glauber's salt is shown in Table 1:
TABLE 1 comparison table
| Test number | 0# | 1# | 2# | 3# |
| Adding amount of mirabilite | 0 | 0.50％ | 0.30％ | 0.10％ |
| Thickness (cm) of raw material layer | 15 | 10 | 8 | 11 |
| Glass level raw material layer ratio (%) | 100 | 80 | 70 | 75 |
| Tent material | Is provided with | Is free of | Is free of | Is free of |
| Defective glass content (%) | 30 | 5 | 3 | 3.5 |
Note: the sample No. 0 in Table 1 was obtained by the prior art, and the sample Nos. 1 to 3 were obtained by the present invention.
It can be seen from the experimental data in table 1 that after the mirabilite is added, the thickness of the frit layer in the kiln is obviously reduced, the bridging phenomenon disappears, and the defective rate of the glass is reduced to less than one sixth of that when the mirabilite is not added.
Detailed Description
The invention relates to a preparation method of high silica glass with good glass liquid level meltability, which comprises the following specific steps:
step one, weighing powder:
the glass powder consists of 45.0-45.6% of quartz sand, 22.5-22.7% of borax, 21.9-22.5% of boric acid, 4.8-5.3% of albite, 2.3-2.6% of soda ash, 2.0-2.1% of sodium nitrate and 0.10-0.50% of mirabilite. The percentage is mass percentage. Wherein the quartz sand and the albite require 100 meshes to pass through, and the other materials require 10 meshes to pass through.
The proportions of the glass powders in the examples of the present invention are shown in Table 2
TABLE 2 glass powder compounding ratio
Step two, mixing powder materials:
and starting the forced mixer to rotate at the speed of 40-50 r/min. And (3) sequencing the weighed powder according to quartz sand, borax, boric acid, albite, soda ash, sodium nitrate and mirabilite, and sequentially feeding the powder into a rotary forced mixer from a feeding port. And after the last powder is put into the mixing tank, continuously stirring for 10-20 min, and stopping stirring to obtain the mixed powder.
Step three, melting high silica glass melt:
opening a discharge port of the forced mixer; and putting the mixed powder into a charging bucket, and conveying the powder to a kiln charging platform for later use. And hanging the electric hoist of the material tank to be used at the upper opening of a feeder, and feeding the mixed powder into the upper front end of the glass liquid surface of the kiln at the speed of 5r/min by the feeder.
And electrically heating the powder added into the kiln to 1400-1600 ℃, and melting to obtain the high silica glass melt.
TABLE 3 Process parameters for the examples
| Process for the preparation of a coating | Unit of | Example 1 | Example 2 | Example 3 |
| Speed of forced mixer | r/min | 40 | 50 | 45 |
| Mixing time of the powder mixture | min | 16 | 12 | 20 |
| Temperature of melting powder | ℃ | 1600 | 1500 | 1400 |
The invention tests the melting conditions of the liquid surface of the high silica glass after the adoption of the embodiments, and the results are shown in the table 4:
TABLE 4 glass level melting test
Namely, only 0.10 to 0.50 percent of mirabilite (Na) is added in the production of the high silica glass2SO4·10H2O), namely the thickness of the raw material layer is less than 15cm, the proportion of the raw material layer on the glass liquid surface is more than 60%, the material filling phenomenon is avoided, and the proportion of the defective glass is less than 30%.
Claims (3)
1. A preparation method of high silica glass melt capable of improving the liquid level melting capacity is characterized by comprising the following specific steps:
step one, weighing powder:
the glass powder consists of 45.0-45.6% of quartz sand, 22.5-22.7% of borax, 21.9-22.5% of boric acid, 4.8-5.3% of albite, 2.3-2.6% of soda ash, 2.0-2.1% of sodium nitrate and 0.10-0.50% of mirabilite; the percentage is mass percentage;
step two, mixing powder materials:
starting a forced mixer; sequencing the weighed powder according to quartz sand, borax, boric acid, albite, soda ash, sodium nitrate and mirabilite, and sequentially putting the powder into a forced mixer with the rotating speed of 40-50 r/min from a feed inlet; after the last powder is put into the mixing tank, continuously stirring for 10-20 min, and stopping stirring to obtain mixed powder;
step 3, melting high silica glass melt:
hoisting the material tank filled with the powder to an upper opening of a feeder; the feeder feeds the mixed powder to the front end above the liquid level of the kiln glass at the speed of 5 r/min.
And (3) electrically heating the powder added into the kiln, and melting at high temperature to obtain the high silica glass melt.
2. The method for preparing high silica glass capable of improving liquid level meltability according to claim 1, wherein the quartz sand and albite are required to pass through 100 meshes; the borax, the boric acid, the soda ash, the sodium nitrate and the mirabilite are required to pass through 10 meshes.
3. The method of claim 1, wherein the melting temperature of the frit is 1400-1600 ℃.
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|---|---|---|---|
| CN202111555539.XA CN114249531B (en) | 2021-12-17 | 2021-12-17 | Preparation method of high silica glass melt capable of improving liquid level melting capacity |
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| CN202111555539.XA CN114249531B (en) | 2021-12-17 | 2021-12-17 | Preparation method of high silica glass melt capable of improving liquid level melting capacity |
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| CN114249531B CN114249531B (en) | 2024-01-19 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103433A (en) * | 1985-04-15 | 1986-12-31 | 中国科学院上海硅酸盐研究所 | Recrystallization temperature is higher than the manufacture method of the high temp glass of silica glass |
| CN1618759A (en) * | 2004-11-05 | 2005-05-25 | 中国科学院上海光学精密机械研究所 | Preparation method of low ultraviolet absorption porous and non-porous high silica glass |
| CN102730967A (en) * | 2012-06-29 | 2012-10-17 | 中国科学院上海光学精密机械研究所 | Preparation method for sensitization-enhanced green light-emitting high-silica glass |
| CN103864295A (en) * | 2014-03-07 | 2014-06-18 | 陕西科技大学 | Preparation method of high silica glass |
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2021
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