CN113874330B - Glass melting furnace and method for producing glass article - Google Patents
Glass melting furnace and method for producing glass article Download PDFInfo
- Publication number
- CN113874330B CN113874330B CN202080038327.1A CN202080038327A CN113874330B CN 113874330 B CN113874330 B CN 113874330B CN 202080038327 A CN202080038327 A CN 202080038327A CN 113874330 B CN113874330 B CN 113874330B
- Authority
- CN
- China
- Prior art keywords
- furnace
- glass
- melting furnace
- wall
- glass melting
- 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.)
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- 239000011521 glass Substances 0.000 title claims abstract description 69
- 238000002844 melting Methods 0.000 title claims abstract description 42
- 230000008018 melting Effects 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 239000006060 molten glass Substances 0.000 claims abstract description 26
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 238000000926 separation method Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 239000002994 raw material Substances 0.000 description 23
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 18
- 229910052697 platinum Inorganic materials 0.000 description 9
- 239000000155 melt Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000005507 spraying Methods 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
- C03B5/20—Bridges, shoes, throats, or other devices for withholding dirt, foam, or batch
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
- C03B7/08—Feeder spouts, e.g. gob feeders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/14—Charging or discharging liquid or molten material
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Glass Melting And Manufacturing (AREA)
- Furnace Charging Or Discharging (AREA)
Abstract
In a glass melting furnace (1) provided with a rear wall (1 b) and a duct (4) penetrating the rear wall (1 b) and allowing molten glass (3) in the furnace (1) to flow out of the furnace (1), the duct (4) is configured to have a protruding portion (4 a) protruding from the rear wall (1 b) toward the inside of the furnace (1).
Description
Technical Field
The present invention relates to a glass melting furnace for melting a glass raw material to produce molten glass, and a method for producing a glass article from the molten glass flowing out of the glass melting furnace.
Background
As is well known, glass articles represented by glass sheets, glass tubes, glass fibers, and the like are produced by molding molten glass produced by melting a glass raw material in a glass melting furnace into a predetermined shape. Molten glass produced in a glass melting furnace is flowed out of the furnace from the inside through a pipe penetrating the furnace wall. Patent document 1 discloses an example of a glass melting furnace.
Prior art literature
Patent literature
Patent document 1: japanese patent application laid-open No. 2010-202444
Disclosure of Invention
Problems to be solved by the invention
However, when a glass melting furnace as disclosed in patent document 1 is used, the following problems to be solved are caused.
That is, as shown in fig. 4, in the vicinity of the surface 200a of the molten glass 200 stored in the glass melting furnace 100 (hereinafter referred to as the furnace 100), there is a glass raw material 300 in a state before melting after being supplied into the furnace 100. The glass raw material 300 may flow so as to descend along the furnace wall 100a, reach the opening of the duct 400, and flow out of the furnace 100 while remaining unmelted (flow indicated by arrow Z).
When such a situation occurs, there is a problem that defects caused by unmelted glass raw materials are contained in the produced glass article, and the quality thereof is lowered. The technical problem of the present invention, which has been completed in view of such circumstances, is to prevent outflow from a glass melting furnace of unmelted glass raw material existing in the glass melting furnace.
Means for solving the problems
The glass melting furnace according to the present invention for solving the above-described problems comprises: a furnace wall; and a duct that penetrates the furnace wall and flows out the molten glass in the furnace, wherein the duct has a protrusion protruding from the furnace wall toward the inside of the furnace.
In the glass melting furnace, the duct has the protruding portion, and thus, the opening portion of the duct is located at a position separated from the furnace wall toward the inside by a length by which the protruding portion protrudes from the furnace wall. Therefore, the unmelted glass raw material (hereinafter, referred to as unmelted raw material) flowing downward along the furnace wall does not flow into the opening of the duct separate from the furnace wall, but collides with the outer peripheral surface of the protruding portion, spreads, and melts. As a result, the raw materials that have not melted can be prevented from flowing out of the glass melting furnace.
In the above-described configuration, it is preferable that a flange portion is provided at the tip of the protruding portion.
In this way, by providing the flange portion at the tip of the protruding portion, even if a part of the unmelted raw material flowing down along the furnace wall collides with the outer peripheral surface of the protruding portion and then flows along the outer peripheral surface of the protruding portion, the unmelted raw material collides with the flange portion and further diffuses and melts. At this time, most of the unmelted raw material is guided by the flange portion, flows along the flange portion in the radial direction of the pipe, and is away from the opening portion of the pipe, so that diffusion and melting are further promoted. By this, it is more advantageous in avoiding the flow of the unmelted raw material into the opening of the pipe. As a result, the raw materials that have not melted can be further appropriately prevented from flowing out of the glass melting furnace. Further, since the strength of the pipe (protruding portion) is improved by the flange portion, it is preferable to avoid breakage of the pipe (protruding portion) even when the pipe is disposed in a deep position in the glass melting furnace and the pipe is subjected to a high pressure from the molten glass in the furnace.
In the above-described configuration, the protruding portion is preferably inclined with respect to the horizontal plane so that the portion of the protruding portion closer to the furnace wall is located higher.
In this way, the portion of the protrusion closer to the furnace wall is located above, and therefore, the pressure received from the molten glass in the glass melting furnace is suppressed at the portion closer to the furnace wall than at the portion closer to the front end of the protrusion. In this way, since the pressure applied to the portion close to the furnace wall can be reduced as much as possible, even when the opening of the duct is provided at a deep position in the furnace and molten glass flows into the duct from the deep position, the breakage of the duct (protruding portion) can be advantageously avoided.
In the above-described configuration, it is preferable that the opening formed at the tip of the protruding portion is inclined with respect to the horizontal plane so that the distance separating the upper end of the opening from the furnace wall is longer than the distance separating the lower end of the opening from the furnace wall.
The unmelted raw material flows downward along the furnace wall, so that the unmelted raw material flows more easily at the upper end than at the lower end of the opening. Therefore, if the upper end of the opening is made longer than the lower end thereof by a distance greater than the separation distance from the furnace wall, it is further advantageous in terms of avoiding the flow of unmelted raw material into the opening of the duct.
In the above configuration, it is preferable that a rib is provided on the outer peripheral surface of the protruding portion.
In this way, the structure is reinforced by the ribs, and is preferable in terms of avoiding breakage of the pipe (protruding portion).
In the above-described structure, it is preferable that a plate-like member is disposed on the inner wall surface of the furnace wall, and the rib is fixed to the plate-like member.
In this way, a further reinforcing effect can be obtained with the fixing of the rib to the plate-like member, and therefore, it is more advantageous in avoiding breakage of the duct (protruding portion).
In the above-described structure, the ribs are preferably provided so as to extend in the tube axis direction of the protruding portion.
In this way, it is preferable to prevent the protruding portion from sagging downward.
In addition, in the method for producing a glass article according to the present invention for solving the above-described problems, a glass article is produced from molten glass flowing out of a glass melting furnace through a pipe penetrating a furnace wall, and a protrusion protruding from the furnace wall toward the inside of the furnace is provided in the pipe.
According to the present manufacturing method, the same operations and effects as those described in the description of the glass melting furnace can be obtained.
Effects of the invention
According to the glass melting furnace and the method for producing glass articles of the present invention, the raw glass material that is not melted and is present in the glass melting furnace can be prevented from flowing out of the glass melting furnace.
Drawings
Fig. 1 is a cross-sectional view showing an outline of a glass melting furnace.
Fig. 2 is an enlarged cross-sectional view showing an enlarged portion a in fig. 1.
Fig. 3 is a perspective view partially showing the periphery of a pipe provided in the glass melting furnace.
Fig. 4 is a cross-sectional view for explaining the problem in the conventional glass melting furnace.
Detailed Description
Hereinafter, a glass melting furnace and a method for manufacturing a glass article according to an embodiment of the present invention will be described with reference to the drawings. Here, "platinum" in the present invention is not limited to pure platinum, but includes platinum alloys (platinum rhodium, etc.) and reinforced platinum (platinum containing zirconia, etc.).
As shown in fig. 1, a glass melting furnace 1 (hereinafter, referred to as a furnace 1), a feeder 2, and a forming apparatus (not shown) are used for executing the method of manufacturing glass articles.
The furnace 1 sequentially melts glass raw materials 3x supplied to the molten glass 3 while heating the molten glass 3 stored in the furnace 1 to generate new molten glass 3, and the furnace 1 causes the molten glass 3 in the furnace 1 to flow out of the furnace 1 through a pipe 4. The molten glass 3 flowing out of the furnace 1 is supplied to a transfer tube 2a of the feeder 2 connected to a pipe 4. The feeder 2 includes, in addition to the transfer tube 2a, a clarifying vessel, a stirred tank, a state adjusting tank, a transfer tube connecting them, and the like, which are not shown. The molten glass 3 having passed through the feeder 2 is supplied to a forming apparatus and formed into a glass article.
The furnace 1 has, as a furnace wall: a front wall 1a located at an upstream end of the glass raw material 3x in the flow direction; a rear wall 1b located at a downstream end in the flow direction; a pair of side walls (not shown) facing the front side and the back side of the paper surface in fig. 1; a top wall 1c; and a bottom wall 1d. These furnace walls are each composed of a plurality of refractories.
A screw feeder 5 for feeding the glass raw material 3x into the furnace 1 is disposed in the front wall 1 a. Burners capable of spraying flame along the surface (liquid surface) of the molten glass 3 are disposed on each of the pair of side walls. An electrode 6 capable of electrically heating the molten glass 3 is disposed on the bottom wall 1d.
In the step of continuously producing new molten glass 3 by melting the glass raw material 3x, the furnace 1 may heat the molten glass 3 only by the electric heating by the electrodes 6, or may heat the molten glass 3 by a combination of the electrodes 6 and the burner.
As shown in fig. 2, an inlet block 7 is included in the rear wall 1 b. The inlet block 7 is one of a plurality of refractories 8 constituting the furnace wall (rear wall 1 b). The inlet block 7 is disposed at the lowermost stage of the refractory 8 constituting the rear wall 1 b.
The inlet block 7 is formed with a hole 7a that opens from the inside of the furnace 1 to the outside of the furnace 1. The pipe 4 inserted into the hole 7a penetrates the inlet block 7 (the rear wall 1 b). The inner peripheral surface of the hole 7a is in direct contact with the outer peripheral surface of the pipe 4. In other words, the inner peripheral surface of the hole 7a is in a state of being covered by the outer peripheral surface of the pipe 4. The duct 4 is disposed above the inner wall surface of the bottom wall 1d. An upstream end of the transfer tube 2a of the feeder 2 is connected in contact with a downstream end of the duct 4. A flange portion 2ab is provided at the upstream end of the transfer tube 2 a. The pipe 4 and the transfer pipe 2a are each made of platinum.
As shown in fig. 2 and 3, the inlet block 7 has a front surface 7b facing the inside of the furnace 1, a rear surface 7c facing the outside of the furnace 1, and a side surface 7d connecting the front surface 7b and the rear surface 7 c.
Regarding the front face 7b forming a part of the inner wall surface of the rear wall 1b among the faces of the inlet block 7, the entire area thereof is covered with a platinum plate 10 as a plate-like member.
The pipe 4 is formed in a cylindrical shape with a pipe axis extending straight. The duct 4 is disposed in an inclined posture with respect to the horizontal plane. The duct 4 has a protruding portion 4a protruding from the rear wall 1b to the inside of the furnace 1. The projection 4a is positioned above the rear wall 1b due to the inclined posture of the duct 4.
An opening 4aa for allowing the molten glass 3 in the furnace 1 to flow into the pipe 4 is formed at the tip of the protruding portion 4a. The opening 4aa is inclined with respect to the horizontal plane. Thus, the upper end (top of the circular flow path cross section) of the opening 4aa is longer than the lower end (bottom of the circular flow path cross section) by a separation distance (separation distance along the horizontal direction) from the rear wall 1 b. The distance between the upper end of the opening 4aa and the rear wall 1b is preferably in the range of 50mm to 350 mm.
A flange portion 4ab is provided at the tip of the protruding portion 4a. The thickness of the flange portion 4ab may be, for example, the same as the thickness of the pipe 4, and the height of the flange portion 4ab (the dimension in the radial direction of the pipe 4) may be, for example, 5 to 35 mm. Further, a plurality of ribs 11 extending in the tube axis direction of the tube 4 are provided on the outer peripheral surface of the protruding portion 4a. The plurality of ribs 11 are arranged so as to be radial with respect to the tube axis of the tube 4 when the opening 4aa is viewed from the front. Each rib 11 is fixed to the outer peripheral surface of the pipe 4 by welding in a state of standing upright with respect to the outer peripheral surface. The front and rear surfaces of each rib 11 are parallel to the tube axis of the tube 4, and have a triangular shape as shown in fig. 2. The dimension of the rib 11 disposed above increases due to the difference in the distance separating the rear wall 1b from the upper end and the lower end of the opening 4aa. The end of each rib 11 on the rear wall 1b side is fixed to the platinum plate 10 by welding. The rib 11 is made of platinum.
Hereinafter, the main actions and effects of the furnace 1 and the method for producing glass articles will be described.
In the above-described furnace 1 and method for producing glass articles, the duct 4 has the protruding portion 4a, and thus the opening portion 4aa of the duct 4 is located at a position separated from the rear wall 1b toward the inside of the furnace 1 by the length by which the protruding portion 4a protrudes from the rear wall 1 b. Therefore, the unmelted glass raw material 3x flowing downward along the rear wall 1b does not flow into the opening 4aa of the duct 4 separated from the rear wall 1b, but collides with the outer peripheral surface of the protruding portion 4a, spreads, and melts. As a result, the unmelted glass raw material 3x can be prevented from flowing out of the furnace 1.
Here, the glass melting furnace and the method for producing glass articles according to the present invention are not limited to the configurations and embodiments described in the above embodiments. As an example, in the above-described embodiment, the duct 4 is provided in an inclined posture with respect to the horizontal plane, but the present invention is not limited thereto, and may be provided in a posture parallel to the horizontal plane.
Reference numerals illustrate:
1. glass melting furnace
1b rear wall
3. Molten glass
4. Pipeline
4a protrusion
4aa opening part
4ab flange portion
10. Platinum plate
11. And (3) ribs.
Claims (5)
1. A glass melting furnace is provided with: a furnace wall; and a duct that penetrates the furnace wall and flows out molten glass in the furnace,
the glass melting furnace is characterized in that,
the duct has a projection projecting from the furnace wall toward the inside of the furnace,
a flange part is arranged at the front end of the protruding part,
the projection is inclined with respect to the horizontal plane such that the portion of the projection closer to the furnace wall is located higher than it is,
the opening portion formed at the tip end of the protruding portion is inclined with respect to a horizontal plane so that the upper end of the opening portion is longer in separation distance from the furnace wall than the lower end.
2. The glass melting furnace according to claim 1, wherein the glass melting furnace comprises a furnace body,
a rib is provided on the outer peripheral surface of the protruding portion.
3. A glass melting furnace according to claim 2, wherein,
a plate-like member is disposed on an inner wall surface of the furnace wall,
the rib is fixed to the plate-like member.
4. A glass melting furnace according to claim 2 or 3, wherein,
the ribs are provided so as to extend in the tube axis direction of the protruding portion.
5. A method for producing a glass article from molten glass flowing out of a glass melting furnace through a pipe penetrating a furnace wall,
the method for manufacturing a glass article is characterized in that,
the pipe is provided with a protrusion protruding from the furnace wall toward the inside of the furnace,
a flange part is arranged at the front end of the protruding part,
the projection is inclined with respect to the horizontal plane such that the portion of the projection closer to the furnace wall is located higher than it is,
the opening portion formed at the tip end of the protruding portion is inclined with respect to a horizontal plane so that the upper end of the opening portion is longer in separation distance from the furnace wall than the lower end.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-126047 | 2019-07-05 | ||
| JP2019126047A JP7330434B2 (en) | 2019-07-05 | 2019-07-05 | Glass melting furnace and method for manufacturing glass article |
| PCT/JP2020/022441 WO2021005935A1 (en) | 2019-07-05 | 2020-06-05 | Glass melting furnace and production method for glass article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113874330A CN113874330A (en) | 2021-12-31 |
| CN113874330B true CN113874330B (en) | 2024-03-01 |
Family
ID=74115197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080038327.1A Active CN113874330B (en) | 2019-07-05 | 2020-06-05 | Glass melting furnace and method for producing glass article |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7330434B2 (en) |
| KR (1) | KR20220031550A (en) |
| CN (1) | CN113874330B (en) |
| WO (1) | WO2021005935A1 (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60155807A (en) * | 1984-01-24 | 1985-08-15 | Mikuni Kogyo Co Ltd | Liquid fuel burner |
| JPH11236237A (en) * | 1998-02-23 | 1999-08-31 | Nippon Electric Glass Co Ltd | Producing device of glass fiber |
| JP2005076930A (en) * | 2003-08-29 | 2005-03-24 | Hatta Kankyo Gijutsu Jimusho:Kk | Device for automatic discharge of molten slag |
| KR100510196B1 (en) * | 2005-02-26 | 2005-08-24 | (주)세라 | Continuous type fusion furnace system for frit production |
| JP2010202444A (en) * | 2009-03-03 | 2010-09-16 | Asahi Glass Co Ltd | Glass melting furnace and glass melting method |
| JP2013193905A (en) * | 2012-03-19 | 2013-09-30 | Nippon Electric Glass Co Ltd | Glass melting apparatus, method for feeding molten glass, and effluent passage for melting furnace |
| JP2015127240A (en) * | 2013-11-26 | 2015-07-09 | 三笠産業株式会社 | Fixed amount delivery port device and fixed amount discharge container |
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| CN206094103U (en) * | 2016-08-29 | 2017-04-12 | 广东省环境科学研究院 | Compound plasma melting furnace of waste incineration fly ash |
| CN109279759A (en) * | 2018-11-05 | 2019-01-29 | 宋丰艾 | A kind of devitrified glass production mixing equipment and devitrified glass mixing manufacture craft |
| WO2019100027A2 (en) * | 2017-11-20 | 2019-05-23 | Corning Incorporated | Glass manufacturing apparatus and methods of fabricating |
| WO2019113287A1 (en) * | 2017-12-08 | 2019-06-13 | Corning Incorporated | Glass manufacturing apparatus and glass manufacturing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0354118Y2 (en) * | 1987-03-12 | 1991-11-28 | ||
| WO2013011837A1 (en) | 2011-07-15 | 2013-01-24 | 日東紡績株式会社 | Glass melting device, device for producing fiberglass, and method for producing fiberglass |
-
2019
- 2019-07-05 JP JP2019126047A patent/JP7330434B2/en active Active
-
2020
- 2020-06-05 WO PCT/JP2020/022441 patent/WO2021005935A1/en active Application Filing
- 2020-06-05 KR KR1020217039737A patent/KR20220031550A/en not_active Application Discontinuation
- 2020-06-05 CN CN202080038327.1A patent/CN113874330B/en active Active
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| JPH11236237A (en) * | 1998-02-23 | 1999-08-31 | Nippon Electric Glass Co Ltd | Producing device of glass fiber |
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| JP2010202444A (en) * | 2009-03-03 | 2010-09-16 | Asahi Glass Co Ltd | Glass melting furnace and glass melting method |
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| JP2015127240A (en) * | 2013-11-26 | 2015-07-09 | 三笠産業株式会社 | Fixed amount delivery port device and fixed amount discharge container |
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| 杨占山.《化工机械基础》.化学工业出版社,1988,第104页加强圈. * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021011405A (en) | 2021-02-04 |
| JP7330434B2 (en) | 2023-08-22 |
| WO2021005935A1 (en) | 2021-01-14 |
| CN113874330A (en) | 2021-12-31 |
| KR20220031550A (en) | 2022-03-11 |
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