CN108455824B - Continuous melting crucible resistant to glass erosion and melting method - Google Patents
Continuous melting crucible resistant to glass erosion and melting method Download PDFInfo
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- CN108455824B CN108455824B CN201810316850.0A CN201810316850A CN108455824B CN 108455824 B CN108455824 B CN 108455824B CN 201810316850 A CN201810316850 A CN 201810316850A CN 108455824 B CN108455824 B CN 108455824B
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- 238000002844 melting Methods 0.000 title claims abstract description 58
- 230000008018 melting Effects 0.000 title claims abstract description 58
- 230000003628 erosive effect Effects 0.000 title claims abstract description 53
- 239000011521 glass Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 17
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 122
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 61
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 238000005260 corrosion Methods 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 17
- 230000007797 corrosion Effects 0.000 claims abstract description 15
- 238000003723 Smelting Methods 0.000 claims abstract description 14
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 14
- 239000005303 fluorophosphate glass Substances 0.000 claims abstract description 12
- 239000002893 slag Substances 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- 229910052681 coesite Inorganic materials 0.000 claims description 12
- 229910052906 cristobalite Inorganic materials 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 229910052682 stishovite Inorganic materials 0.000 claims description 12
- 229910052905 tridymite Inorganic materials 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 6
- 238000010309 melting process Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 3
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- DWYMPOCYEZONEA-UHFFFAOYSA-L fluoridophosphate Chemical compound [O-]P([O-])(F)=O DWYMPOCYEZONEA-UHFFFAOYSA-L 0.000 abstract description 5
- 239000005304 optical glass Substances 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- ZHQXROVTUTVPGO-UHFFFAOYSA-N [F].[P] Chemical compound [F].[P] ZHQXROVTUTVPGO-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000006060 molten glass Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
-
- 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)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Glass Compositions (AREA)
Abstract
The invention discloses a continuous melting crucible resistant to glass erosion and a melting method, and belongs to the technical field of optical glass melting production equipment. It mainly solves the problem of corrosion to the platinum crucible wall when the fluorophosphate is melted. It is mainly characterized in that: the crucible comprises a ceramic material erosion-resistant cylinder, the erosion-resistant cylinder is provided with a sealing groove and a crucible cover, the erosion-resistant cylinder extends into the crucible from a platinum crucible feeding port, the lower end of the erosion-resistant cylinder is below the liquid level, and the bottom of the platinum crucible is provided with a communicating pipe or a material leaking pipe; the method comprisesSlowly preheating a platinum crucible to a charging temperature, filling sealing liquid into the sealing groove, and covering a crucible cover when charging is interrupted;firstly, adding bedding glass slag into a platinum crucible, and starting to add powder for continuous smelting after the liquid level rises to submerge the lower end of the erosion-resistant cylinder;and the fully smelted glass liquid enters the stirring crucible through the communicating pipe or is leaked and injected out of the furnace through the material leaking pipe. The invention has the characteristics of improving the internal quality of the product, improving the yield of the fluorophosphate glass product and reducing the production cost, and is mainly used for continuously melting the fluorophosphate glass.
Description
Technical Field
The invention belongs to the technical field of optical glass melting, and relates to a continuous melting crucible resistant to glass erosion and a melting method, in particular to a crucible for continuous melting production of fluorine-phosphorus glass and a melting method.
Background
The fluorophosphate optical glass is special optical glass with low refraction and low dispersion, can eliminate secondary spectral chromatic aberration, improve the imaging quality of an optical lens, has a lower softening point, can be made into an aspheric lens through primary or secondary compression, and is an excellent optical material for producing high-grade digital products. However, fluorophosphate glasses have strong volatility and corrosiveness because they contain a large amount of fluoride components.
The most serious erosion stage in the melting process of the fluorophosphate glass is the melting stage of the glass raw material, and the most serious erosion position of the crucible body is the liquid level position of the glass. The existing smelting equipment mostly adopts a platinum crucible for direct melting, trace platinum particles enter glass to form platinate after the platinum crucible wall is continuously corroded by the fluorophosphoric glass, and the solubility of the components of the platinate in the fluorophosphoric glass is extremely low, so that the platinate can be separated out from the glass and form a large amount of foreign matters in the cooling and discharging stage, the quality of the fluorophosphoric glass product is influenced and even scrapped, meanwhile, the platinum material can also generate certain loss by directly adopting the platinum crucible for smelting, and the production cost of the product is indirectly increased.
Disclosure of Invention
The invention aims to provide a continuous melting crucible resistant to corrosion of fluorophosphate glass and a melting method, which are used for solving the problem that fluorophosphate corrodes a platinum crucible wall in a melting stage, improving the yield of fluorophosphate glass products and reducing the production cost of the products.
The technical scheme for continuously melting the crucible comprises the following steps: the utility model provides a continuous founding crucible of resistant glass erosion for fluorophosphate glass founds, includes platinum crucible, its characterized in that: the device also comprises an anti-corrosion cylinder; the erosion-resistant cylinder is made of ceramic materials and comprises an upright cylinder body matched with a platinum crucible feeding port, and a sealing groove and a matched crucible cover are arranged on the outer side of the upper end of the cylinder body; the anti-corrosion barrel extends into the barrel from a feeding port of the platinum crucible, the sealing groove is positioned outside the feeding port, and the lower end of the barrel body is below the liquid level; and a communicating pipe or a material leaking pipe is arranged at the bottom of the platinum crucible.
In the technical scheme of the invention, the bottom of the platinum crucible is provided with an upright cylindrical partition plate of which the upper end is higher than the lower port of the erosion-resistant cylinder.
In the technical scheme of the invention, a flat plate-shaped partition plate is arranged in the platinum crucible, is positioned above the communicating pipe or the material leaking pipe and below the lower port of the erosion-resistant cylinder.
The technical proposal of the invention is that Al in the ceramic material composition of the erosion-resistant cylinder2O3Not less than 80% and SiO2≤8%。
The technical scheme of the invention is that the anti-corrosion cylinder adopts Al2O3Is 85% and SiO25% of Al2O3Is 90% and SiO2Is 6% or Al2O3Is 90% and SiO2Is 3% of ceramic material.
In the technical scheme of the invention, a supporting table for supporting the erosion-resistant cylinder is arranged outside the upper port of the platinum crucible.
In the technical scheme of the invention, the sealing groove is an annular sealing groove with a U-shaped section; the crucible cover is an aluminum crucible cover.
The technical solution of the melting method of the invention is as follows: the melting method of the continuous melting crucible resistant to glass erosion is characterized by comprising the following process operation steps:
slowly preheating a platinum crucible to a charging temperature, filling sealing liquid into a sealing groove of the erosion-resistant cylinder, and covering a crucible cover when charging is interrupted to realize relative sealing of the crucible;
during feeding, firstly adding bedding glass slag into the platinum crucible, and after the liquid level is gradually raised and the lower end of the erosion-resistant cylinder is submerged, continuously adding the powder for continuous smelting, so that the powder is prevented from directly contacting the wall of the platinum crucible, and the powder is prevented from corroding the surface of the platinum;
and the fully smelted glass liquid enters the stirring crucible through the communicating pipe or is leaked and injected out of the furnace through the material leaking pipe.
The first technical solution of the melting method of the inventionBefore adding the powder, the powder needs to be put into an oven for preheating, and the preheating temperature is not lower than 300 ℃.
The technical scheme of the melting method of the invention is that the platinum crucible is heated in a radiation manner by adopting a silicon-carbon rod or a silicon-molybdenum rod.
The platinum crucible in the technical scheme of the invention is used as a material preparation crucible for continuously preparing glass slag by adopting powder or a material melting crucible of a continuous melting furnace for continuously melting by adopting powder.
When the smelting furnace is repaired, the corrosion-resistant cylinder is vertically inserted into the platinum crucible, so that the corrosion-resistant cylinder is convenient to remove and replace, a gap is required to be reserved between the bottom of the corrosion-resistant cylinder and the bottom of the platinum crucible, and when the fluorophosphate glass is smelted, the lower end of the corrosion-resistant cylinder is positioned below the liquid level of the glass. In order to weaken the volatilization of components in the smelting process, sealing liquid is filled into a sealing groove on the erosion-resistant cylinder before smelting, and a crucible cover is covered after each charging so as to realize the relative sealing of the crucible.
The crucible is used in the following mode: the material melting crucible is used as a material preparation crucible for continuously preparing glass slag by adopting powder or a material melting crucible of a continuous melting furnace for continuously melting by adopting powder. When the crucible is used as a material preparation crucible, the crucible is firstly used for preparing clinker glass slag, and then the crucible made of platinum materials is used for carrying out secondary smelting and molding on the glass slag to produce the fluorophosphate glass. When the glass melting pot is used as a melting pot of a continuous melting furnace, glass is melted into glass liquid, and then the glass liquid enters the stirring pot, the clarifying chamber and the working pot through the communicating pipe and is directly subjected to material leakage forming.
Although the oven can reduce the burst of the ceramic erosion-resistant cylinder by slowing down the temperature rise rate, the burst phenomenon of the erosion-resistant cylinder in the glass melting process cannot be completely avoided because the ceramic material has the inherent characteristic of poor thermal shock resistance. In order to prevent the broken anti-corrosion barrel fragments from entering and blocking the communicating pipe or the material leaking pipe, the bottom of the platinum crucible is provided with an upright barrel-shaped or circular plane-shaped clapboard. In order to prevent the corrosion-resistant barrel fragments from affecting the product quality, the baffle plate cannot adopt a planar design when used as a stock crucible for preparing glass slag.
The invention can solve the problem of erosion of powder to the platinum crucible wall in the melting stage of fluorophosphate, improve the internal quality of the product, improve the yield of the fluorophosphate glass product and reduce the production cost.
Drawings
FIG. 1 is a sectional view of embodiment A.
FIG. 2 is a sectional view of embodiment B.
FIG. 3 is a sectional view of embodiment C.
In the figure: 1. a platinum crucible; 2. a liquid level; 3. a support table; 4. a corrosion resistant cartridge; 5. sealing liquid; 6. a crucible cover; 7. a cylindrical partition plate; 8. a communicating pipe; 9. a material leaking pipe; 10. a planar separator.
Detailed Description
The continuous melting crucible resistant to glass erosion is mainly used for melting fluorophosphorus glass and comprises a platinum crucible 1, a support table 3, a cylindrical partition plate 7 or a planar partition plate 10, an erosion-resistant cylinder 4 and a crucible cover 6, wherein the crucible is shown in figures 1 to 3. Wherein, the support platform 3 is positioned outside the upper port of the platinum crucible 1 and is used for supporting the erosion-resistant cylinder 4. Resistant section of thick bamboo 4 is ceramic material, including with 1 pan feeding port complex upright cylinder of platinum crucible, the cylinder upper end outside is equipped with seal groove and complex crucible lid 6. The sealing groove is a circular ring-shaped sealing groove with a U-shaped section, sealing liquid 5 is filled in the sealing groove, and the crucible cover 6 is matched with the sealing groove. The erosion-resistant cylinder 4 extends into the platinum crucible 1 from the feeding port, the sealing groove is positioned outside the feeding port, and the lower end of the cylinder body is below the liquid level 2. Al in the ceramic material composition of the erosion-resistant cylinder 42O3Not less than 80% and SiO2Less than or equal to 8 percent. The bottom of the platinum crucible 1 is provided with a communicating pipe 8 or a material leaking pipe 9. The bottom of the platinum crucible 1 is provided with a vertical cylindrical partition plate 7 with the upper end higher than the lower port of the erosion-resistant cylinder 4, as shown in figures 1 and 2. A circular plane-shaped partition plate 10 which is positioned above the communicating pipe 8 or the material leaking pipe 9 and below the lower port of the erosion-resistant cylinder 4 is arranged in the platinum crucible 1, as shown in figure 3.
Adopt platinum material preparation platinum crucible 1 and tube-shape baffle 7 or circular plane shape baffle 10, communicating pipe 8, leak material pipe 9, the smelting pot adopts the silicon carbon rod or silicon molybdenum rod to carry out radiant heating, repair the crucible base that leaves the hole of leaking material in the bottom in the smelting pot earlier, sit platinum crucible 1 on the base, and repair brace table 3 on smelting pot upper portion, will be able to bear or endure to invade in section of thick bamboo 4 inserts platinum crucible 1, make the seal groove fall on brace table 3 and fixed, the smelting pot is repaired the back seal groove of building and is located outside the furnace body. The melting temperature of the fluorophosphate series glass is lower (less than or equal to 850 ℃), the temperature at the sealing groove can be lower than 100 ℃ after reasonable heat insulation and crucible body fall design, so that water can be injected into the sealing groove to be used as sealing liquid, and the relative sealing of the crucible is realized during the feeding interval.
And the furnace can be roasted after the furnace is built. In order to prevent the ceramic corrosion-resistant cylinder 4 from cracking, the temperature rise rate of the oven is controlled below +25 ℃/h when the temperature reaches above 500 ℃. When the corrosion-resistant cylinder 4 is cracked or corroded seriously after long-term use, the corrosion-resistant cylinder 4 can be lifted out of the platinum crucible 1 for removal and replacement, but before replacement, a new corrosion-resistant cylinder 4 needs to be preheated in a standby muffle furnace, the preheating temperature is not lower than 300 ℃, and the corrosion-resistant cylinder 4 needs to be slowly and carefully operated in the installation process.
The invention relates to a melting method for continuously melting a crucible by adopting glass erosion resistance, which comprises the following process operation steps:
slowly preheating a platinum crucible 1 to a charging temperature, filling sealing liquid 5 into a sealing groove of an erosion-resistant cylinder 4, and covering a crucible cover 6 when charging is interrupted to realize relative sealing of the crucible;
during feeding, firstly adding bedding glass slag into the platinum crucible 1, and after the liquid level 2 is gradually raised and submerges the lower end of the erosion-resistant cylinder 4, continuously adding powder for continuous smelting; before adding the powder, the powder needs to be put into an oven for preheating, and the preheating temperature is not lower than 300 ℃;
the molten glass fully smelted enters a stirring crucible or through a communicating pipe 8And (4) leaking and pouring out of the furnace through a material leakage pipe 9.
Since the fluorophosphate glass formulation usually contains Al3+The invention adopts high-alumina ceramic material to prepare the melting crucible, and has the advantages that: the method has the advantages that platinum particles are effectively prevented from being melted into the glass, the cation proportion in the glass cannot be greatly influenced, and only the reasonable increase and decrease of corresponding components are needed when the glass raw materials are prepared.
The following examples of the present invention are provided for the purpose of illustration and description only and are not intended to limit the invention.
Example A:
as shown in FIG. 1, Al is used2O385% and SiO2The erosion-resistant cylinder 4 is made of 5% ceramic material, the cylindrical partition plate 7 is arranged in a vertical cylindrical mode, and the continuous melting crucible is used as a continuous melting furnace melting crucible. After the implementation, the loss of fluorine-containing components in the product is obviously reduced, the service life of the erosion-resistant cylinder 4 is 8 days, the service life of the platinum crucible 1 is 6 months, and the content of platinum foreign matters in the product is 1.1 per cm3Reduced to 0.05 pieces/cm3。
Example B:
as shown in FIG. 2, Al is used2O3Is 90% and SiO2The erosion-resistant cylinder 4 is made of 6% ceramic material, the cylindrical partition plate 7 is arranged in a vertical cylindrical shape, and the continuous melting crucible is used as a glass slag preparation crucible. After the implementation, the loss of fluorine-containing components in the product is obviously reduced, the service life of the erosion-resistant cylinder 4 is 9 days, the service life of the platinum crucible 1 is 6 months, and the content of platinum foreign matters in the product is 1.1 per cm3Reduced to 0.04 pieces/cm3。
Example C:
as shown in FIG. 3, Al is used2O3Is 90% and SiO2The erosion-resistant cylinder 4 is made of 3% ceramic material, the plane-shaped partition plate 10 is arranged in a circular mode, and the continuous melting crucible is used as a continuous melting furnace melting crucible. After the implementation, the loss of fluorine-containing components in the product is obviously reduced, the service life of the erosion-resistant cylinder 4 is 12 days, the service life of the platinum crucible 1 is 6 months, and the content of platinum foreign matters in the product is 1.1 per cm3Reduced to 0.01 pieces/cm3。
Claims (9)
1. The utility model provides a continuous founding crucible of resistant glass erosion for fluorophosphate glass founds, includes platinum crucible (1), its characterized in that: also comprises a corrosion-resistant cylinder (4); the erosion-resistant cylinder (4) is made of ceramic materials and comprises an upright cylinder body matched with a feeding port of the platinum crucible (1), and a sealing groove and a matched crucible cover (6) are arranged on the outer side of the upper end of the cylinder body; the anti-corrosion barrel (4) extends into the platinum crucible (1) from a material inlet port, the sealing groove is positioned outside the material inlet port, and the lower end of the barrel body is below the liquid level (2); the bottom of the platinum crucible (1) is provided with a communicating pipe (8) or a material leaking pipe (9); al in the ceramic material composition of the erosion-resistant cylinder (4)2O3Not less than 80% and SiO2≤8%。
2. A glass erosion resistant continuous melting crucible as set forth in claim 1, wherein: the bottom of the platinum crucible (1) is provided with an upright cylindrical clapboard (7) the upper end of which is higher than the lower port of the erosion-resistant cylinder (4).
3. A glass erosion resistant continuous melting crucible as set forth in claim 1, wherein: a plane-shaped partition plate (10) which is positioned above the communicating pipe (8) or the material leaking pipe (9) and below the lower port of the anti-corrosion barrel (4) is arranged in the platinum crucible (1).
4. A continuous melting crucible resistant to glass erosion as set forth in claim 1, 2 or 3, wherein: the corrosion-resistant cylinder (4) adopts Al2O3Is 85% and SiO25% of Al2O3Is 90% and SiO2Is 6% or Al2O3Is 90% and SiO2Is 3% of ceramic material.
5. A continuous melting crucible resistant to glass erosion as set forth in claim 1, 2 or 3, wherein: and a supporting table (3) for supporting the anti-corrosion cylinder (4) is arranged outside the upper port of the platinum crucible (1).
6. A continuous melting crucible resistant to glass erosion as set forth in claim 1, 2 or 3, wherein: the sealing groove is an annular sealing groove with a U-shaped section; the crucible cover is an aluminum crucible cover (6).
7. A melting process using the continuous melting crucible of any of claims 1 to 6 resistant to glass attack, characterized in that the melting process comprises the following process steps:
slowly preheating a platinum crucible (1) to a charging temperature, charging sealing liquid (5) into a sealing groove of an erosion-resistant cylinder (4), and covering a crucible cover (6) during intermittent charging to realize relative sealing of the crucible;
when feeding, firstly adding bedding glass slag into the platinum crucible (1), after the liquid level (2) is gradually raised and submerges the lower end of the erosion-resistant cylinder (4), continuously adding powder for continuous smelting;
the fully smelted glass liquid enters a stirring crucible through a communicating pipe (8) or is leaked and injected out of the furnace through a material leakage pipe (9), and when the temperature reaches over 500 ℃, the temperature rise rate of the furnace needs to be controlled below +25 ℃/h.
8. The melting method using the continuous melting crucible resistant to glass erosion as set forth in claim 7, wherein: first, theBefore adding the powder, the powder needs to be put into an oven for preheating, and the preheating temperature is not lower than 300 ℃.
9. The continuous melting crucible and the melting method resistant to glass erosion of claim 7 or 8, characterized in that: the platinum crucible (1) adopts a silicon-carbon rod or a silicon-molybdenum rod to carry out radiation type heating.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810316850.0A CN108455824B (en) | 2018-04-10 | 2018-04-10 | Continuous melting crucible resistant to glass erosion and melting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810316850.0A CN108455824B (en) | 2018-04-10 | 2018-04-10 | Continuous melting crucible resistant to glass erosion and melting method |
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| CN108455824A CN108455824A (en) | 2018-08-28 |
| CN108455824B true CN108455824B (en) | 2019-12-27 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN204385040U (en) * | 2014-08-08 | 2015-06-10 | 南通晶鑫光学玻璃有限公司 | A kind of opticglass smelting pot |
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| EP0087409A1 (en) * | 1981-08-24 | 1983-09-07 | CARMAN, Justice N. | Glass making furnace apparatus |
| CN1295037A (en) * | 2000-11-30 | 2001-05-16 | 中国科学院上海光学精密机械研究所 | Device for semi-continuously smelting phosphate glass |
| EP2365944A1 (en) * | 2008-12-15 | 2011-09-21 | Heraeus Quarzglas GmbH & Co. KG | Melting crucible for use in a crucible drawing method for quartz glass |
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| CN203173958U (en) * | 2013-03-28 | 2013-09-04 | 湖北新华光信息材料有限公司 | Optical glass smelting crucible |
| CN103951161A (en) * | 2014-05-10 | 2014-07-30 | 蚌埠玻璃工业设计研究院 | Device for maintaining easily-eroded part of sheet glass melting furnace pool wall |
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| CN204224428U (en) * | 2014-10-28 | 2015-03-25 | 远东光电股份有限公司 | A kind of glass furnace |
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| CN108455824A (en) | 2018-08-28 |
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