CN112592029A - Kiln for producing high-temperature glass - Google Patents
Kiln for producing high-temperature glass Download PDFInfo
- Publication number
- CN112592029A CN112592029A CN202110013021.7A CN202110013021A CN112592029A CN 112592029 A CN112592029 A CN 112592029A CN 202110013021 A CN202110013021 A CN 202110013021A CN 112592029 A CN112592029 A CN 112592029A
- Authority
- CN
- China
- Prior art keywords
- side wall
- furnace
- temperature glass
- upper side
- hearth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000011521 glass Substances 0.000 title claims abstract description 54
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- 239000011819 refractory material Substances 0.000 claims description 9
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 239000010431 corundum Substances 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 239000000446 fuel Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000006060 molten glass Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
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
-
- 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
- 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
- C03B5/2353—Heating the glass by combustion with pure oxygen or oxygen-enriched air, e.g. using oxy-fuel burners or oxygen lances
-
- 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
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
-
- 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
- C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
- C03B5/43—Use of materials for furnace walls, e.g. fire-bricks
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Glass Melting And Manufacturing (AREA)
- Furnace Details (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention provides a kiln which has a uniform temperature field and is suitable for producing high-temperature glass. The furnace for producing the high-temperature glass is characterized in that a hearth bottom, a lower side wall, an upper side wall and a furnace top are combined to form a hearth, at least one total oxygen burning gun is arranged on the upper side wall and/or the furnace top, more than one pair of heating electrodes are arranged on the lower side wall, and the cross section of the hearth is circular or tends to be circular. According to the invention, the hearth of the kiln for producing glass is designed into a round or cavity which tends to be round, so that the temperature field in the kiln is more uniform, and the internal quality of the glass is better; the temperature in the furnace can reach 1400-1700 ℃ through the reasonable arrangement of the oxy-fuel combustion burner and the double action of the heating electrode, and the method is suitable for the production of high-temperature glass.
Description
Technical Field
The invention relates to a device for melting high-temperature glass, in particular to an oxy-fuel combustion kiln for melting high-temperature glass.
Background
The high-temperature glass has the characteristics of high melting point and high forming temperature, and when the glass is melted by a common air combustion-supporting kiln, the glass has more defects such as bubbles, stones and the like, and the forming temperature of the glass cannot be ensured, so that the glass forming operation is difficult. The existing glass kiln is generally designed into a cube or a cuboid, the temperature difference in the kiln is not uniform, and the production requirement of high-temperature glass cannot be met; continuous melting furnace technology is generally adopted for producing glass, but a single-crucible furnace is generally adopted when producing certain special glass or developing new products. With the increasing demand of special high-temperature glass, the single-crucible small-batch production kiln is adopted to produce the high-temperature glass, so that the problems of limited product specification, low yield, frequent maintenance, high production cost and the like exist, and the requirement of the domestic market cannot be met, therefore, the design of the kiln suitable for melting the high-temperature glass is more and more urgent.
Disclosure of Invention
The invention aims to solve the technical problem of providing a kiln which has a uniform temperature field and is suitable for producing high-temperature glass.
The technical scheme adopted by the invention for solving the technical problem is as follows: the furnace for producing the high-temperature glass is characterized in that a hearth bottom, a lower side wall, an upper side wall and a furnace top are combined to form a hearth, at least one total oxygen burning gun is arranged on the upper side wall and/or the furnace top, more than one pair of heating electrodes are arranged on the lower side wall, and the cross section of the hearth is circular or tends to be circular.
Furthermore, a charging opening is formed in the upper side wall, a stirrer opening and a smoke exhaust opening are formed in the furnace top, and a discharge opening is formed in the hearth bottom.
Furthermore, the hearth bottom, the lower side wall, the upper side wall and the furnace top are all provided with heat insulation walls made of multiple layers of composite heat insulation layers.
Further, the cross section of the hearth tends to be circular, which means that the cross section is a regular polygon, preferably a regular hexagon, a regular octagon or a regular decagon.
Furthermore, 2-12 total oxygen burning guns are arranged on the upper side wall and/or the furnace top.
Further, the total oxygen burning gun is installed downwards at an angle of 45-90 degrees with the upper side wall.
Furthermore, the hearth bottom, the lower side wall, the upper side wall and the furnace top are all made of an electric melting high-zirconium refractory material and/or an electric melting zirconia corundum refractory material.
Further, the furnace roof is of an arch structure.
Further, the heat-insulating wall is made of heavy refractory materials and/or 2-3 layers of light refractory bricks and/or 1-2 layers of fiber products.
Further, the lower side wall is provided with 1-5 pairs of heating electrodes.
The invention has the beneficial effects that: the hearth of the kiln for producing the glass is designed into a round or cavity which tends to be round, so that the temperature field in the kiln is more uniform, and the inherent quality of the glass is better; the temperature in the furnace can reach 1400-1700 ℃ through the reasonable arrangement of the oxy-fuel combustion burner and the double action of the heating electrode, and the method is suitable for the production of high-temperature glass.
Drawings
FIG. 1 is a cross-sectional view of a front view of the kiln of the present invention.
Fig. 2 is a schematic cross-sectional view of a first hearth of the kiln of the present invention.
Fig. 3 is a schematic cross-sectional view of a second hearth of the kiln of the present invention.
Fig. 4 is a schematic cross-sectional view of a third hearth of the kiln of the present invention.
Detailed Description
As shown in fig. 1-4, the kiln for producing high-temperature glass of the invention comprises a hearth bottom 1, a lower side wall 2, an upper side wall 4 and a furnace top 6, wherein the hearth bottom 1, the lower side wall 2, the upper side wall 4 and the furnace top 6 are combined together to form a hearth 8, the cross section (the cross section parallel to the hearth bottom 1) of the hearth 8 is circular or tends to be circular, and at least one total oxygen burning gun 5 is arranged on the upper side wall 4 and/or the furnace top 6.
When the cross section of the hearth 8 is square or rectangular, the temperature field in the furnace has the conditions of high local temperature and low local temperature, for example, the temperature at the furnace corner position can be low, so that the temperature field in the furnace is uneven, and the temperature of glass liquid at each part is also inconsistent in the process of melting glass, thereby causing the quality problems of stripes, bubbles and the like of the glass. According to the invention, the cross section of the hearth 8 is designed to be circular or tend to be circular, so that the temperature difference of each part can be reduced to a greater extent, the temperature field in the kiln can be more uniform as the cross section approaches to the circular shape, but in the actual production process, the cross section of the hearth 8 is designed to be a regular polygon, and the cross section of the hearth 8 is preferably designed to be a regular hexagon, a regular octagon or a regular decagon as shown in fig. 2, fig. 3 and fig. 4, in consideration of the overall design, cost control and other factors of the kiln.
The exterior of the hearth bottom 1, the lower side wall 2, the upper side wall 4 and the furnace top 6 are all provided with heat preservation walls 7 made of multiple layers of composite heat preservation layers, so that the loss of the temperature in the kiln in the production process can be effectively reduced, and the temperature rise and the temperature maintenance are ensured. The heat-insulating wall 7 is made of heavy refractory materials and/or 2-3 layers of light refractory bricks and/or 1-2 layers of fiber products.
Because the kiln is used for producing high-temperature glass, the hearth bottom 1, the lower side wall 2, the upper side wall 4 and the furnace top 6 are all made of high-temperature-resistant and corrosion-resistant materials, and generally, the fused zirconia corundum material is adopted, but under the combined action of oxy-fuel combustion and electrode heating, the corrosion speed of the zirconia corundum is higher, so that after the factors of furnace repair time, furnace repair materials, labor cost and the like are comprehensively considered, the hearth bottom 1, the lower side wall 2, the upper side wall 4 and the furnace top 6 are made of the fused high-zirconia refractory material, or the hearth bottom 1, the lower side wall 2, the upper side wall 4 and the furnace top 6 are made of the fused high-zirconia refractory material and the fused zirconia corundum material in a mixing mode, and the production cost can be effectively saved.
The melting of the high-temperature glass needs continuous and stable high temperature, and the adoption of oxy-fuel combustion can not only improve the combustion efficiency and increase the heat value, but also change the atmosphere environment of the molten glass. At least one total oxygen burning gun 5 is arranged on the upper side wall 4 and/or the furnace top 6, the glass raw material is heated in a heat radiation mode, in order to enable the temperature to be higher and the temperature field to be more uniform, 2-12 total oxygen burning guns 5 are preferably arranged, 2-8 total oxygen burning guns 5 are more preferably arranged, and the total oxygen burning guns are uniformly distributed on the upper side wall 4 and/or the furnace top 6 of the furnace. In general, the glass is melted by heat radiation by arranging the burning torch 5 at 90 degrees to the side wall, and the flame is directly aligned to the side wall, so that the heat utilization rate is low, and the side wall is seriously corroded. In the invention, the total oxygen burning gun 5 is arranged downwards at an angle of 45-90 degrees, preferably 50-89 degrees, more preferably 60-88 degrees, and even more preferably 65-88 degrees with the upper side wall 4, as shown in figure 1. The flame generated by the total oxygen burning gun 5 has certain heat convection to the molten glass to be melted, and because the high-temperature area of the flame is contacted with the molten glass or is close to the molten glass, the melting of the glass can absorb the radiation heating of the flame and the convection heating brought by the flame, thereby greatly improving the heat efficiency and being very beneficial to saving energy; in addition, because the setting angle of the total oxygen burning gun 5 and the flame length thereof are reasonable, the high temperature area of the flame is far away from the upper side wall 4, and the corrosion to the kiln is reduced. The total oxygen lance 5 is arranged at the angle whether the total oxygen lance 5 is arranged on the upper side wall 4 or the furnace top 6 or when the upper side wall 4 and the furnace top 6 are arranged.
In the kiln of the invention, a heating electrode 3 is arranged on the lower side wall 2. Because the kiln is used for melting high-temperature glass, if a tin electrode is adopted, the tin electrode is easy to fall off due to high-temperature corrosion in the using process and enter glass liquid, and the inherent quality problems of stones and the like appear in the glass, and therefore, a molybdenum electrode or a platinum electrode is preferably adopted as the heating electrode 3 in the invention. In order to make the temperature field of the molten glass in the kiln uniform, 1-5 pairs of heating electrodes are preferably arranged, and 1-4 pairs of heating electrodes are more preferably arranged.
In the kiln, a charging opening 12 is arranged on the upper side wall 4 and is used for adding glass raw materials; a discharge port 11 is arranged on the hearth bottom 1 and used for discharging glass liquid; the furnace top 6 is provided with a smoke outlet 10 for discharging smoke and dust generated in the glass melting process. In the invention, a stirrer opening 9 is arranged on the furnace top 6 and is used for installing and lifting a stirrer, and the glass is homogenized in a stirring mode in the glass production process. The roof 6 may take many forms, such as flat-topped, curved, and in the present invention, the roof 6 is preferably of an arch-shaped construction which is strong and durable under high temperature conditions.
The kiln is adopted to produce high-temperature glass, the total oxygen burning guns 5 are arranged on the upper side wall 4 and/or the furnace top 6, the heating electrodes 3 are arranged on the lower side wall 2, the lower side wall 2 is positioned in a molten glass area, the upper side wall 4 is a flame space, the heating electrodes 3 can directly heat molten glass due to reasonable selection of the heating electrodes 3 in terms of quantity, arrangement position and the like, the total oxygen burning guns 5 can effectively and quickly raise the temperature in the furnace chamber 8 to and keep 1400-plus-1700 ℃ by combining the reasonable selection of the total oxygen burning guns 5 in terms of quantity, arrangement angle, flame length and the like, the temperature field in the furnace is more uniform, and the kiln is durable in use and can produce high-temperature glass of various specifications and varieties.
Claims (10)
1. The kiln for producing the high-temperature glass is characterized in that a hearth bottom (1), a lower side wall (2), an upper side wall (4) and a furnace top (6) are combined to form a hearth (8): the upper side wall (4) and/or the furnace top (6) are/is provided with at least one total oxygen burning gun (5), the lower side wall (2) is provided with more than one pair of heating electrodes (3), and the cross section of the hearth (8) is circular or tends to be circular.
2. A furnace for producing high temperature glass according to claim 1, wherein: the upper side wall (4) is provided with a feeding port (12), the furnace top (6) is provided with a stirrer port (9) and a smoke outlet (10), and the hearth bottom (1) is provided with a discharge port (11).
3. A furnace for producing high temperature glass according to claim 1 or 2, wherein: and heat-insulating walls (7) made of multiple layers of composite heat-insulating layers are arranged outside the hearth bottom (1), the lower side wall (2), the upper side wall (4) and the furnace top (6).
4. A furnace for producing high temperature glass according to claim 1 or 2, wherein: the cross section of the hearth (8) is of a trend circle, namely the cross section is of a regular polygon, preferably a regular hexagon, a regular octagon or a regular decagon.
5. A furnace for producing high temperature glass according to claim 1 or 2, wherein: 2-12 total oxygen burning guns (5) are arranged on the upper side wall (4) and/or the furnace top (6).
6. A furnace for producing high temperature glass according to claim 1 or 2, wherein: the total oxygen burning gun (5) is downwards arranged at an angle of 45-90 degrees with the upper side wall (4).
7. A furnace for producing high temperature glass according to claim 1 or 2, wherein: the hearth bottom (1), the lower side wall (2), the upper side wall (4) and the furnace top (6) are all made of an electric melting high-zirconium refractory material and/or an electric melting zirconia corundum refractory material.
8. A furnace for producing high temperature glass according to claim 1 or 2, wherein: the furnace roof (6) is of an arch structure.
9. A furnace for producing high temperature glass according to claim 1 or 2, wherein: the heat-insulating wall (7) is made of heavy refractory materials and/or 2-3 layers of light refractory bricks and/or 1-2 layers of fiber products.
10. A furnace for producing high temperature glass according to claim 1 or 2, wherein: and 1-5 pairs of heating electrodes (3) are arranged on the lower side wall (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110013021.7A CN112592029A (en) | 2021-01-06 | 2021-01-06 | Kiln for producing high-temperature glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110013021.7A CN112592029A (en) | 2021-01-06 | 2021-01-06 | Kiln for producing high-temperature glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112592029A true CN112592029A (en) | 2021-04-02 |
Family
ID=75207891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110013021.7A Withdrawn CN112592029A (en) | 2021-01-06 | 2021-01-06 | Kiln for producing high-temperature glass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112592029A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115367999A (en) * | 2022-09-21 | 2022-11-22 | 成都光明光电股份有限公司 | Intermittent optical glass production method and device |
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| EP1911726A1 (en) * | 2006-10-12 | 2008-04-16 | Linde Aktiengesellschaft | Glass melting furnace and method for melting glass |
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| CN102910799A (en) * | 2012-09-25 | 2013-02-06 | 芜湖东旭光电科技有限公司 | Heating electrode and alkali-free boron-free aluminosilicate glass melting furnace with same |
| CN203095832U (en) * | 2013-03-19 | 2013-07-31 | 泰安佳成机电科技有限公司 | Kiln combustion system |
| CN206654834U (en) * | 2017-04-19 | 2017-11-21 | 成都光明光电股份有限公司 | The production kiln of High Temperature Optical glass |
| CN210419704U (en) * | 2019-08-21 | 2020-04-28 | 成都光明光电股份有限公司 | Swinging furnace for smelting optical glass |
| CN210481189U (en) * | 2019-09-11 | 2020-05-08 | 成都南玻玻璃有限公司 | Mixed combustion-supporting glass melting furnace |
| CN211394274U (en) * | 2019-02-12 | 2020-09-01 | 北京正兴鸿业金属材料有限公司 | Distribution structure of glass kiln burner |
| CN111908770A (en) * | 2020-08-14 | 2020-11-10 | 秦皇岛玻璃工业研究设计院有限公司 | Glass kiln and method for heating glass batch by using same |
| CN214193016U (en) * | 2021-01-06 | 2021-09-14 | 成都光明光电股份有限公司 | Kiln for producing high-temperature glass |
-
2021
- 2021-01-06 CN CN202110013021.7A patent/CN112592029A/en not_active Withdrawn
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101253125A (en) * | 2005-07-13 | 2008-08-27 | 圣戈班伊索福公司 | Method for glass preparation |
| CN2903046Y (en) * | 2005-12-06 | 2007-05-23 | 力诺集团有限责任公司 | Twelve angular furnace |
| EP1911726A1 (en) * | 2006-10-12 | 2008-04-16 | Linde Aktiengesellschaft | Glass melting furnace and method for melting glass |
| CN201343485Y (en) * | 2008-11-11 | 2009-11-11 | 泰山玻璃纤维有限公司 | Melting furnace for glass melting operation |
| CN101823832A (en) * | 2010-03-12 | 2010-09-08 | 三瑞科技(江西)有限公司 | All electric melting insulator glass furnace |
| CN102910799A (en) * | 2012-09-25 | 2013-02-06 | 芜湖东旭光电科技有限公司 | Heating electrode and alkali-free boron-free aluminosilicate glass melting furnace with same |
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| CN210481189U (en) * | 2019-09-11 | 2020-05-08 | 成都南玻玻璃有限公司 | Mixed combustion-supporting glass melting furnace |
| CN111908770A (en) * | 2020-08-14 | 2020-11-10 | 秦皇岛玻璃工业研究设计院有限公司 | Glass kiln and method for heating glass batch by using same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115367999A (en) * | 2022-09-21 | 2022-11-22 | 成都光明光电股份有限公司 | Intermittent optical glass production method and device |
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Application publication date: 20210402 |