CN113874330A - Glass melting furnace and method for producing glass article - Google Patents
Glass melting furnace and method for producing glass article Download PDFInfo
- Publication number
- CN113874330A CN113874330A CN202080038327.1A CN202080038327A CN113874330A CN 113874330 A CN113874330 A CN 113874330A CN 202080038327 A CN202080038327 A CN 202080038327A CN 113874330 A CN113874330 A CN 113874330A
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- CN
- China
- Prior art keywords
- glass
- furnace
- melting furnace
- wall
- pipe
- 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.)
- Granted
Links
- 239000011521 glass Substances 0.000 title claims abstract description 55
- 238000002844 melting Methods 0.000 title claims abstract description 43
- 230000008018 melting Effects 0.000 title claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 239000006060 molten glass Substances 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000002994 raw material Substances 0.000 description 22
- 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
- 239000000463 material Substances 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000000926 separation method Methods 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
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- PXXKQOPKNFECSZ-UHFFFAOYSA-N platinum rhodium Chemical compound [Rh].[Pt] PXXKQOPKNFECSZ-UHFFFAOYSA-N 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 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
- 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 (1b) and a pipeline (4) which penetrates through the rear wall (1b) and enables molten glass (3) in the furnace (1) to flow out of the furnace (1), the pipeline (4) is provided with a protruding part (4a) protruding from the rear wall (1b) to the inner side of the furnace (1).
Description
Technical Field
The present invention relates to a glass-melting furnace for melting glass raw materials 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 plates, glass tubes, glass fibers, and the like are manufactured by forming molten glass, which is produced by melting glass raw materials in a glass melting furnace, into a predetermined shape. Molten glass produced in a glass melting furnace is caused to flow out of the furnace from the furnace through a pipe having a furnace wall penetrating therethrough. Here, patent document 1 discloses an example of a glass melting furnace.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2010-202444
Disclosure of Invention
Problems to be solved by the invention
However, when the glass melting furnace as disclosed in patent document 1 is used, the following problems to be solved arise.
That is, as shown in fig. 4, glass raw material 300 in a state before being supplied into the furnace 100 and melted exists in the vicinity of the surface 200a of molten glass 200 stored in the glass-melting furnace 100 (hereinafter referred to as furnace 100). The glass raw material 300 may flow down 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 included in the produced glass article, and the quality thereof is degraded. In view of the above circumstances, a technical object of the present invention is to prevent the outflow of an unmelted glass raw material present in a glass melting furnace from the glass melting furnace.
Means for solving the problems
The glass melting furnace of the present invention for solving the above problems includes: a furnace wall; and a pipe that penetrates the furnace wall and flows out the molten glass inside the furnace to the outside of the furnace, wherein the pipe has a protruding portion that protrudes 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 of the duct is located at a position separated from the furnace wall toward the inside of the furnace by the length of the protruding portion protruding from the furnace wall. Therefore, the unmelted glass raw material (hereinafter referred to as unmelted raw material) flowing down along the furnace wall does not flow into the opening of the pipe separated from the furnace wall, but collides with the outer peripheral surface of the protruding portion, spreads, and melts. As a result, the unmelted raw material can be prevented from flowing out of the glass-melting furnace.
In the above configuration, it is preferable that a flange portion is provided at a distal end 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, further spreads, and melts. At this time, most of the unmelted raw material is guided by the flange portion, flows in the radial direction of the pipe along the flange portion, and is separated from the opening portion of the pipe, thereby further promoting diffusion and melting. This is advantageous in that the unmelted raw material is prevented from flowing into the opening of the pipe. As a result, the flow of the unmelted raw material out of the glass-melting furnace can be further appropriately prevented. Further, since the strength of the pipe (projecting portion) is improved by the flange portion, it is preferable to avoid the breakage even when the pipe (projecting portion) is disposed at a deep position in the glass melting furnace and receives a high pressure from the molten glass in the furnace.
In the above-described configuration, it is preferable that the projection is inclined with respect to the horizontal plane such that a portion of the projection closer to the furnace wall is located more upward.
In this way, the portion of the protrusion closer to the furnace wall is located further upward, so that 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 tip end of the protrusion. In this way, the pressure applied to the portion near the furnace wall can be reduced as much as possible, and therefore, 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, it is advantageous in avoiding damage to the duct (protrusion).
In the above-described configuration, it is preferable that the opening portion for flowing in the molten glass formed at the distal end of the protruding portion is inclined with respect to a horizontal plane such that an upper end of the opening portion is separated from the furnace wall by a longer distance than a lower end of the opening portion.
The unmelted raw material flows down along the furnace wall, and therefore, the unmelted raw material flows into the upper end of the opening more easily than into the lower end. Therefore, it is further advantageous to prevent the unmelted raw material from flowing into the opening of the duct if the distance between the upper end and the furnace wall of the opening is longer than the distance between the lower end and the upper end.
In the above configuration, preferably, a rib is provided on an outer peripheral surface of the protruding portion.
In this way, the structure is reinforced by the rib, which is preferable in avoiding damage to the duct (protrusion).
In the above-described configuration, preferably, the plate-like member is disposed on an 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 along with the fixation of the rib and the plate-like member, and therefore, it is more advantageous in avoiding the damage of the duct (the protruding portion).
In the above-described configuration, the rib is preferably provided so as to extend in the pipe axial direction of the protruding portion.
This is preferable in preventing the protrusion from drooping downward.
In addition, a method for producing a glass article according to the present invention for solving the above-described problems is a method for producing a glass article from molten glass flowing out of a glass melting furnace through a pipe having a furnace wall penetrating therethrough, wherein the pipe is provided with a protruding portion protruding from the furnace wall into the furnace.
According to the present manufacturing method, the same operations and effects as those described in the above description of the glass-melting furnace can be obtained.
Effects of the invention
According to the glass melting furnace and the method for manufacturing a glass article of the present invention, it is possible to prevent the outflow of the unmelted glass raw material present in the glass melting furnace from the glass melting furnace.
Drawings
Fig. 1 is a cross-sectional view schematically showing a glass melting furnace.
Fig. 2 is an enlarged cross-sectional view showing a portion a in fig. 1 in an enlarged manner.
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 a problem in the conventional glass-melting furnace.
Detailed Description
Hereinafter, a glass melting furnace and a method for producing 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 strengthened platinum (platinum containing zirconia, etc.).
As shown in fig. 1, a glass melting furnace 1 (hereinafter referred to as furnace 1), a feeder 2, and a forming apparatus (not shown) are used to perform the method for producing glass articles.
The furnace 1 heats the molten glass 3 stored in the furnace 1, and simultaneously sequentially melts the glass raw materials 3x supplied to the molten glass 3 to produce new molten glass 3, and the furnace 1 flows out the molten glass 3 in the furnace 1 to the outside of the furnace 1 through the pipe 4. The molten glass 3 flowing out of the furnace 1 is supplied to a transfer pipe 2a of a feeder 2 connected to a pipe 4. The feeder 2 includes, for example, a clarifying vessel, a stirring tank, a state adjusting tank, a transport pipe connecting these, and the like, which are not shown, in addition to the transport pipe 2 a. 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 includes, as furnace walls: a front wall 1a located at an upstream end in the flow direction of the glass raw material 3 x; a rear wall 1b located at a downstream end in the flow direction; a pair of side walls (not shown) facing each other on the front and back sides of the sheet of fig. 1; a top wall 1 c; and a bottom wall 1 d. Each of the furnace walls is made of a plurality of refractories.
A screw feeder 5 for supplying the glass material 3x into the furnace 1 is disposed on the front wall 1 a. Burners capable of ejecting flames along the surface (liquid surface) of the molten glass 3 are disposed on the pair of side walls, respectively. An electrode 6 capable of electrically heating the molten glass 3 is disposed on the bottom wall 1 d.
In the step of continuously producing new molten glass 3 by melting glass raw material 3x, furnace 1 may heat molten glass 3 only by energization heating by electrode 6, or may heat molten glass 3 by using both electrode 6 and a 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 has a hole 7a that extends from the inside of the furnace 1 to the outside of the furnace 1. The duct 4 inserted into the hole 7a penetrates the inlet block 7 (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 1 d. An upstream end of the transport pipe 2a of the feeder 2 is connected to a downstream end of the pipe 4 in a state of contact therewith. A flange 2ab is provided at the upstream end of the transport pipe 2 a. The conduit 4 and the transport 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.
Of the respective surfaces of the inlet block 7, the entire surface 7b forming a part of the inner wall surface of the rear wall 1b is covered with a platinum plate 10 as a plate-shaped member.
The pipe 4 is formed in a cylindrical shape with a pipe axis extending linearly. 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 projecting portion 4a is located upward toward 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 protrusion 4 a. 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 in the separation distance (separation distance along the horizontal direction) from the rear wall 1b than the lower end (bottom of the circular flow path cross section). 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 projection 4 a. The thickness of the flange portion 4ab may be, for example, about 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 pipe axial direction of the pipe 4 are provided on the outer peripheral surface of the protruding portion 4 a. The plurality of ribs 11 are disposed radially about the pipe axis of the pipe 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 standing state. The front and back surfaces of each rib 11 are parallel to the pipe axis of the pipe 4, and have a triangular shape as shown in fig. 2. The dimension of the rib 11 disposed above is increased due to the difference in the distance from the rear wall 1b between the upper end and the lower end of the opening 4 aa. The end of each rib 11 on the rear wall 1b side is fixed to the platinum plate 10 by welding. The ribs 11 are made of platinum.
Hereinafter, the main operation and effect of the furnace 1 and the method for producing a glass article will be described.
In the furnace 1 and the method for manufacturing a glass article described above, since the duct 4 has the protruding portion 4a, the opening 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 of the protruding portion 4a protruding from the rear wall 1 b. Therefore, the unmelted glass raw material 3x flowing down along the rear wall 1b does not flow into the opening 4aa of the pipe 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 material 3x can be prevented from flowing out of the furnace 1.
Here, the glass melting furnace and the method for producing a glass article according to the present invention are not limited to the configurations and embodiments described in the above embodiments. 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.
Description of reference numerals:
1 glass melting furnace
1b rear wall
3 molten glass
4 pipeline
4a protrusion
4aa opening part
4ab flange
10 platinum plate
11 ribs.
Claims (8)
1. A glass melting furnace is provided with: a furnace wall; and a pipe which penetrates the furnace wall and flows out the molten glass in the furnace to the outside of the furnace,
the glass-melting furnace is characterized in that,
the duct has a protruding portion protruding from the furnace wall toward the furnace inside.
2. The glass-melting furnace of claim 1,
a flange portion is provided at the tip of the protruding portion.
3. The glass-melting furnace of claim 1 or 2,
the projection is inclined with respect to a horizontal plane such that a portion of the projection that is closer to the furnace wall is located further upward.
4. A glass-melting furnace according to any one of claims 1 to 3,
the opening portion for flowing in the molten glass is formed at the front end of the protruding portion, and the opening portion is inclined with respect to a horizontal plane such that the upper end of the opening portion is separated from the furnace wall by a longer distance than the lower end of the opening portion.
5. The glass-melting furnace according to any one of claims 1 to 4,
ribs are provided on the outer peripheral surface of the protruding portion.
6. The glass melting furnace according to claim 5,
a plate-like member is disposed on an inner wall surface of the furnace wall,
the rib is fixed to the plate-like member.
7. The glass-melting furnace of claim 5 or 6,
the rib is provided so as to extend in the tube axis direction of the protruding portion.
8. A method for producing a glass article from molten glass flowing out of a glass melting furnace through a pipe having a furnace wall penetrating therethrough,
the method for manufacturing a glass article is characterized in that,
the duct is provided with a projection projecting from the furnace wall toward the furnace inside.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019126047A JP7330434B2 (en) | 2019-07-05 | 2019-07-05 | Glass melting furnace and method for manufacturing glass article |
| JP2019-126047 | 2019-07-05 | ||
| 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 true CN113874330A (en) | 2021-12-31 |
| CN113874330B 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 |
| CN104801531A (en) * | 2015-04-29 | 2015-07-29 | 绵阳市鑫科源环保科技有限公司 | System for fusing and cracking industrial sludge with plasma and treatment technology of system |
| 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 CN CN202080038327.1A patent/CN113874330B/en active Active
- 2020-06-05 KR KR1020217039737A patent/KR20220031550A/en not_active Application Discontinuation
- 2020-06-05 WO PCT/JP2020/022441 patent/WO2021005935A1/en active Application Filing
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| 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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| WO2019100027A2 (en) * | 2017-11-20 | 2019-05-23 | Corning Incorporated | Glass manufacturing apparatus and methods of fabricating |
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| 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 |
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| 天津大学水利系编: "《小型水电站（上册）》", 水利水电出版社, pages: 617 - 618 * |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2021011405A (en) | 2021-02-04 |
| WO2021005935A1 (en) | 2021-01-14 |
| CN113874330B (en) | 2024-03-01 |
| KR20220031550A (en) | 2022-03-11 |
| JP7330434B2 (en) | 2023-08-22 |
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