KR20130014037A - Method of manufacturing glass - Google Patents

Method of manufacturing glass Download PDF

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Publication number
KR20130014037A
KR20130014037A KR1020120082390A KR20120082390A KR20130014037A KR 20130014037 A KR20130014037 A KR 20130014037A KR 1020120082390 A KR1020120082390 A KR 1020120082390A KR 20120082390 A KR20120082390 A KR 20120082390A KR 20130014037 A KR20130014037 A KR 20130014037A
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South Korea
Prior art keywords
electrode
glass
refractory
electrodes
melting furnace
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KR1020120082390A
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Korean (ko)
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KR101634417B1 (en
Inventor
히로까즈 히와따시
쯔구노부 무라까미
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아반스트레이트 가부시키가이샤
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    • 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
    • C03B5/02—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating
    • C03B5/027—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture in electric furnaces, e.g. by dielectric heating by passing an electric current between electrodes immersed in the glass bath, i.e. by direct resistance heating
    • C03B5/03—Tank furnaces
    • 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
    • C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/425—Preventing corrosion or erosion

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Glass Melting And Manufacturing (AREA)
  • Glass Compositions (AREA)

Abstract

PURPOSE: A manufacturing method of a glass is provided to control the location of a front edge and to prevent the collision of a laminated refractory on an electrode when an electrode is eroded. CONSTITUTION: A manufacturing method of a glass comprises a step of dissolving the glass by introducing a glass raw material into a melting furnace. The furnace is formed of laminated a pair of electrodes(20) and a plurality of refractory materials(111c). The electrodes comprise a metal which has conductivity at high temperatures. The front end is located at a specific location by electrodes which are movable by pressure and being supported by nearby refractory materials. The metal which has conductivity at high temperature comprises at least one of tin oxide, molybdenum, and zirconium oxide.

Description

Glass manufacturing method {METHOD OF MANUFACTURING GLASS}

The present invention relates to a method for producing glass. Moreover, this invention relates to the manufacturing method of the glass substrate for flat panel displays (FPD), especially the glass substrate for liquid crystal displays (LCD).

Conventionally, the radiant heat of a gas flame and the direct electricity supply system are used as a heating method of the molten glass in a glass melting furnace. In the direct energization method, the molten glass is energized between the opposing electrodes, and the molten glass is heated by Joule heat generated at the time of energization.

Also in the manufacture of the glass of the glass substrate for FPD, the gas flame and the direct energization method have been used as a heating method of the molten glass.

However, in the glass substrate for FPD, the glass in which the alkali metal-containing component is limited to a small amount, or the alkali-free glass which does not substantially contain the alkali metal component have high electrical resistance, so that it is heated by direct current supply (directly). In order to perform conduction heating), it is necessary to enlarge the electrode. At this time, since the platinum used conventionally as an electrode of direct electricity heating is a rare metal and expensive, there existed a cost problem at the time of enlargement of an electrode. In Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-292323), tin oxide and molybdenum, which are inexpensive electrode materials, are used for an electrode as compared with platinum.

Japanese Patent Application Publication No. 2003-292323

However, in the electrode using tin oxide or molybdenum, there is a problem in that the portion in contact with the molten glass is worn down by erosion. In general, a glass melting furnace has a structure in which refractory is laminated, and the tin oxide and molybdenum electrode are embedded in the wall of the glass melting furnace in a state in which the surroundings are surrounded by a refractory material. At this time, when the tin oxide or molybdenum electrode wears down due to erosion, the refractory layer laminated on the tin oxide or molybdenum electrode may collapse, and the glass melting furnace may not be used.

Therefore, the subject of this invention is providing the manufacturing method of the glass which makes life of the furnace provided with an electrode possible.

The method for producing glass according to the present invention is a method for producing glass in which a glass raw material is introduced to dissolve the glass in a melting furnace formed by stacking at least a pair of electrodes and a plurality of refractory materials, wherein the pair of electrodes are subjected to a high temperature. It is made of a material containing a conductive metal, and is held by a surrounding refractory so that the electrode can be moved by pressing so that the tip of the electrode is in a predetermined position.

In addition, since the electrode can be moved by pressing so that the tip of the electrode is in a predetermined position, collapse of the refractory layer laminated on the electrode can be prevented even if the electrode is eroded. Therefore, this invention can provide the manufacturing method of the glass which makes life of the glass melting furnace provided with an electrode possible. In addition, it is preferable that the said predetermined position is a position of the front end of an electrode in the vicinity of the wall surface inside of a glass melting furnace. If the tip of the electrode is located near the inner wall surface of the glass melting furnace, the refractory layer laminated on the electrode will not collapse even if the electrode is eroded.

Moreover, in the manufacturing method of the glass which concerns on this invention, it is preferable that an electroconductive metal contains at least 1 sort (s) from a tin oxide, molybdenum, and zirconium oxide at the said high temperature.

Moreover, in the manufacturing method of the glass which concerns on this invention, it is preferable that the collapse prevention means of the said refractory body is performed in a melting furnace.

Moreover, in the manufacturing method of the glass which concerns on this invention, it is preferable that a collapse prevention means arrange | positions another electrode adjacent to the back of the said electrode.

Moreover, in the manufacturing method of the glass which concerns on this invention, it is preferable that the temperature of the molten glass in a melting furnace is 1500 degreeC or more.

Moreover, in the manufacturing method of the glass which concerns on this invention, it is preferable that an electrode is a composite which integrated several electrode.

Moreover, in the manufacturing method of the glass which concerns on this invention, it is preferable that an electrode presses from the outer side of a melting furnace as a composite which integrated several electrode.

In addition, the method for producing glass according to the present invention is a method for producing glass in which a glass material is introduced into a melting furnace formed by stacking at least a pair of electrodes and a plurality of refractory materials to dissolve the glass, wherein the pair of electrodes are conductive. The electrode and the circumference when the electrode held by the surrounding refractory is moved to a predetermined position so as to be movable so that the tip of the electrode is in a predetermined position so as to be movable. And heating the glass present in the gap of the refractory.

In addition, the method for producing glass according to the present invention is a method for producing glass in which a glass raw material is introduced into a melting furnace formed by stacking at least a pair of electrodes and a plurality of refractory materials to dissolve the glass. It is made of a material containing a conductive metal, and the electrode is provided with a force that resists the internal pressure of the glass in the melting furnace so that the tip of the electrode is in a predetermined position.

Moreover, the manufacturing method of the glass which concerns on this invention can shape | mold the obtained glass to sheet form, and can manufacture the glass substrate for flat panel displays.

According to the method for producing glass according to the present invention, in a glass melting furnace having an electrode, even if the electrode is worn down by erosion of the molten glass, the refractory layer laminated on the electrode does not collapse, which enables life of the furnace. The manufacturing method of glass can be provided.

1 is a block diagram of a glass manufacturing apparatus and a flow diagram of a glass manufacturing process.
2 is a detailed view of a dissolution tank (melting furnace).
3 is a detailed view of the electrode.
4 is an image diagram regarding movement of an electrode.
5 is an image of the addition of a new electrode.
6 is an image view of a modification.

EMBODIMENT OF THE INVENTION Hereinafter, one Embodiment of this invention is described with reference to attached drawing. In addition, the following description is related to an example of this invention, This invention is not limited by these.

(1) overall configuration

EMBODIMENT OF THE INVENTION Hereinafter, as one Embodiment of the manufacturing method of the glass which concerns on this invention, the manufacturing method of the glass plate for the glass substrate of a flat panel display is demonstrated.

(1-1) Raw Material of Glass

In order to manufacture a glass plate according to the present invention, first, glass raw materials are mixed so as to have a desired glass composition. For example, when manufacturing a glass substrate for flat panel displays, especially a liquid crystal display (LCD), it is preferable to mix a raw material so that it may have the following compositions.

(a) SiO 2 : 50-70 mass%,

(b) B 2 O 3 : 5-18 mass%,

(c) Al 2 O 3 : 10-25 mass%,

(d) MgO: 0-10 mass%,

(e) CaO: 0-20 mass%,

(f) SrO: 0-20 mass%,

(o) BaO: 0 to 10% by mass,

(p) RO: 5-20 mass% (where R is at least one selected from Mg, Ca, Sr and Ba),

(q) R '2 O: 0 ~ 2.0 mass% (however, R' is at least one jongim selected from Li, Na, and K),

(r) 0.05-1.5 mass% in total of at least 1 sort (s) of metal oxide selected from tin oxide, iron oxide, and cerium oxide.

(1-2) Outline of Glass Manufacturing Process

The outline | summary of each process for manufacturing glass is demonstrated below, referring FIG.

First, a melting process is performed, and in that process, the raw material of the glass mixed so that it may become said composition is supplied to the dissolution tank 101, and is heated to 1500 degreeC or more. The heated raw material is melted into molten glass.

In the following clarification process, the said molten glass is clarified by the clarification tank 102. As shown in FIG. Specifically, the molten glass is heated in the clarification tank 102, and the gas component contained in the molten glass forms bubbles or vaporizes to exit the molten glass.

In the following stirring process, the molten glass is homogenized by stirring in the stirring tank 103 by the stirring blade (not shown) with which the stirring tank 103 is equipped.

In the next molding step, the molten glass is supplied to the molding apparatus 104. In the molding apparatus 104, the glass is molded into plate-shaped glass. In this embodiment, the molten glass is continuously shaped into a sheet by the overflow downdraw method. The molded sheet-shaped glass is cut | disconnected and turns into a glass plate.

(2) detailed configuration

(2-1) Details of the dissolution tank

The dissolution tank 101 is demonstrated below with reference to FIG.

The dissolution tank 101 is provided with the liquid tank B and the upper space A comprised by refractory materials, such as a fire resistant brick. The dissolution tank 101 is the structure which laminated | stacked the paired electrode 200 (one of which is not shown), and several refractory bricks 111c, The said electrode and the said refractory brick become a member which comprises the said dissolution tank. have. On the wall surface of the upper space A of the dissolution tank 101, the burner 300 which burns a flame by burning gas, such as fuel and oxygen, is provided. The burner 300 heats the refractory constituting the upper space A by the burned gas, and heats and dissolves the glass raw material with radiant heat emitted from the refractory that has become a high temperature. The liquid tank B is provided with plural pairs of electrodes 200 (one not shown) paired with two opposing walls 111a and 111b. The paired electrode 200 (one is not shown) is provided in the wall 111a, 111b which mutually opposes the liquid tank B of the dissolution tank 101. As shown in FIG. Specifically, the electrode 111 which is not shown in figure is provided in the position which opposes each of the electrodes 200 provided in the wall 111b in the wall 111a. Here, the pair of electrodes 200 is separated into a positive electrode and a negative electrode, and has a structure in which a current flows between the positive and negative electrodes. At this time, a positive and negative shared electrode may be provided on the bottom of the liquid tank B so that the electrode on the wall and the positive and negative shared electrode on the bottom are paired. 2 shows a state in which three pairs of electrodes 200 (one is not shown) are provided. By the paired electrodes 200, the molten glass is energized to generate joule heat from the molten glass itself. In the melting tank 101, the molten glass is heated to 1500 degreeC or more.

As shown in FIG. 3, the wall 111 is formed by stacking a plurality of refractory bricks 111c and electrodes 201a. The electrode 200 is formed by stacking a plurality of electrodes 201a to form an integrated electrode 200, and is embedded between the fire resistant bricks 111c and held by the fire resistant bricks 111c. Specifically, the plurality of electrodes 201a described later of the electrode 200 are stacked on the fire resistant brick 111c. On the plurality of electrodes 201a, a plurality of electrodes 201a are further stacked. The fire resistant brick 111c is laminated | stacked around the laminated electrode 201a, and hold | maintains the electrode 201a. The fire resistant brick 111c is also laminated on the electrode 201a. Each of the fire resistant bricks 111c has a substantially rectangular parallelepiped shape, and the electrode 201a also has a substantially rectangular parallelepiped. The fire resistant brick 111c and the electrode 201a are in contact with each plane. The angle which the adjacent planes comprise is set to 90 degreeC or about 90 degreeC. For this reason, a gap hardly occurs between the electrode 201a and the fire resistant brick 111c. The dissolution tank 101 is pressurized toward the outside of the dissolution tank 101 by the molten glass G in the dissolution tank 101. Therefore, a constant pressure is applied to the outer wall of the dissolution tank 101 toward the inside of the dissolution tank 101 by a jack or the like not shown. In addition, although the material which becomes an adhesive material is not used between each laminated fire resistant brick 111c and each of the electrode 201a, you may use an adhesive material as needed.

(2-2) Details of the Electrode

Referring to FIG. 3, the electrode 200 and the electrode 201a will be described. In addition, below, in the dissolution tank 101, the side with molten glass G is made inside or inside, and the opposite side of the inside is outside or outside from the wall 111 as a starting point.

3 is an enlarged image view of a wall 111 of a portion where the electrode 200 is installed. As shown in FIG. 3, the electrode 200 has a plurality of electrodes 201a. The electrode 201a is a fired body made of tin oxide or a fired body containing tin oxide as a main component, and has a shape close to a rectangular parallelepiped. A metal connector 202 for connecting the electrode 201a to a power source is attached to one end (hereinafter, referred to as an end) in the longitudinal direction of the electrode 201a. The end of the electrode 201a faces the outside of the wall 111, and the other end (hereinafter referred to as the front end) facing the end of the electrode 201a faces the molten glass G located inside the wall 111. It is built between the fire resistant bricks 111c. The electrode 200 shown in FIG. 3 has a total of 12 electrodes 201a, which are stacked four stages in a vertical direction with three electrodes 201a arranged horizontally. The tip of each electrode 201a is positioned at the same position as the vertical surface (wall surface X shown in FIG. 4) in contact with the molten glass G in the dissolution tank 101 of the wall 111, or protrudes from the molten glass G than the wall surface X. Installed to be in position.

In addition, the tip of the electrode 201a in contact with the molten glass G is pressurized toward the outside of the dissolving tank 101 by the molten glass G in the dissolving tank 101. Therefore, a constant pressure is applied to the end of the electrode 201a by pressing a jack (not shown) into the dissolution tank 101. That is, the force which resists the internal pressure of the molten glass in the dissolution tank 101 is provided, and is hold | maintained.

(2-3) Means to prevent the collapse of the refractory

Below, the collapse prevention means of the refractory body which concerns on this invention is demonstrated. In addition, below, in the dissolution tank 101, the side with molten glass G is made inside or inside, and the opposite side of the inside is outside or outside from the wall 111 as a starting point.

As mentioned above, although the molten glass is heated to 1500 degreeC or more in the dissolution tank 101, the electrode 201a which comprises the electrode 200 which energizes molten glass also heats by contacting Joule heat or high temperature molten glass by energization. do. In the heated electrode 201a, when the electrode 201a is eroded and worn, the tip of the electrode 201a is located outside the wall surface X. As described above, a plurality of fire resistant bricks 111c are stacked on the electrode 201a. Therefore, when the electrode 201a wears down, there exists a danger that the fire resistant brick 111c laminated | stacked on it will collapse. In the state where the tip of the electrode 201a is located outside the wall surface X, the fire resistant brick 111c constituting the wall 111 is more easily energized than the molten glass, and the wall 111 is formed of an electrode ( 200) is eroded from the periphery of the part where it is installed.

Therefore, the tip of the electrode 201a is positioned at the same position as the wall X, or inside the wall X, that is, the molten glass G, so that the tip of the electrode 201a is not located outside the wall X by erosion and wear. Adjust to protrude to the side. Specifically, first, the electrode 201a is heated. Since the electrode 201a is cooled by injecting air from the end, the electrode 201a is heated when the cooling is stopped. As described above, there is almost no gap between the electrode 201a and the refractory brick 111c. Even so, the molten glass slightly penetrates and hardens between the electrode 201a and the refractory brick 111c. The glass is heated by heating the electrode 201a, and the viscosity decreases. The glass with reduced viscosity becomes a lubricating material for alleviating the friction between the electrode 201a and the refractory brick 111c. Next, the plurality of electrodes 201a are collectively pressed and moved from the outside of the wall 111 by the jack or the like toward the molten glass G in the wall 111, that is, in the dissolution tank 101. At this time, the plurality of electrodes 201a are uniformly pressed from the outside of the melting furnace. The pressure can be obtained by using a worm jack, the pressure required to move the electrode 201. In addition, the required pressure can calculate the required load from the molten glass hydraulic pressure and the weight of the oxidation electrode in the furnace. Thereby, the collapse of the fire-resistant brick 111c laminated | stacked on the electrode 201a, ie, the collapse of the wall 111 of the dissolution tank 101 can be prevented as much as possible. However, if the electrode 201a continues to erode, the electrode 201a eventually loses weight, and the electrode 201a which moves to the wall surface X or to the inside of the electrode disappears. Thus, a new electrode is disposed behind the electrode 200. Specifically, for example, as shown in FIG. 5A, the electrode 201a is eroded and worn, and the terminal of the electrode 201a does not protrude from the outer surface of the wall 111. After being removed or before, as shown in Fig. 5B, the electrode 201b, which is a new electrode 201 different from the electrode 201a, has a distal end of the electrode 201a. Install in contact with. That is, another new electrode 201b is added to the end of the existing electrode 201a. If the added electrode 201b is eroded and worn down, it is sufficient to repeat adding a new electrode 201b. Thereby, even if the lifetime of the electrode 201a runs out, the collapse of the fire-resistant brick 111c, ie, the collapse of the wall 111, can be prevented as much as possible. That is, the electrode 200 and the dissolution tank 101 can be extended.

When adding another new electrode 201b to the end of the electrode 201a, the connector 202 attached to each end of the electrode 201a is removed. When another new electrode 201b is added to the end of the electrode 201a, the connector 202 is attached to the end of the attached electrode 201b. The end of the attached electrode 201b is pressed at a constant pressure toward the end of the electrode 201a by a jack or the like, and the end of the electrode 201a and the tip of the electrode 201b come into contact with each other.

In addition, although the electricity supply from the electrode 200 must be stopped while the connector 202 is removed, as shown in FIG. 2 in which a plurality of pairs of the electrodes 200 are provided, the three pairs of electrodes 200 are removed. In the case of the equipped dissolution tank 101, the new electrode 201 may be added to each pair of electrodes 200. Thereby, the electrode 201 can be added without lowering the temperature of the molten glass G as much as possible.

(3) Features

(3-1)

In the said embodiment, the electrode 200 is provided between the laminated fire resistant bricks 111c, and is hold | maintained by the fire resistant bricks 111c. That is, the electrode 200 is in direct contact with the fire resistant brick 111c. Thereby, it is possible to prevent the gap 111 from being formed in the wall 111 of the dissolution tank 101 as much as possible.

(3-2)

In the above embodiment, when the electrode 201 constituting the electrode 200 is eroded and worn, the electrode 201a is moved to the molten glass G side in the dissolution tank 101 so that the tip of the electrode 201a is positioned at a predetermined position. Position it. The predetermined position refers to the position of the tip of the electrode near the inner wall surface of the glass melting furnace. The position near the inner wall surface of the glass melting furnace is specifically the same position as the inner wall surface X of the wall 111 or the inner side thereof is preferable, but the position where the laminated fire resistant bricks 111c will not collapse. It may be outside of the wall surface X of the wall 111 on the back surface. Thereby, collapse of the fire-resistant brick 111c of the wall 111 can be prevented as much as possible, and the dissolution tank 101 can be extended. Moreover, when the tip of an electrode protrudes inward more than the inside wall surface X of the inside of the wall 111, the amount of erosion of an electrode will increase, the lifetime of an electrode will become short, and it is unpreferable from a viewpoint of extending the melting furnace.

(3-3)

In the above embodiment, a new electrode 201b is added to the end of the electrode 201a. That is, another electrode is disposed adjacent to the rear of the electrode 200. That is, even if the electrode 201a is worn down, the electrode 201b which is a new electrode 201 is added continuously, and the electrode 200 is extended. Thereby, collapse of the fire-resistant brick 111c of the wall 111 can be prevented as much as possible, and the dissolution tank 101 can be extended.

(3-4)

In the above embodiment, the electrode 200 is composed of a plurality of electrodes 201. Thereby, the electrode 200 larger than each electrode 201 can be comprised by a simple method.

(4) Modification

(4-1)

In the above embodiment, when a new electrode 201b is added to the end of the electrode 201a, the connector 202 attached to the end has to be removed. However, in another embodiment, the connector 202 may be more easily removed. For example, as shown in FIG. 6, the connector unit 203 integrating and attaching the connector 204 of the plurality of electrodes 201 to an integrated frame or the like is in contact with an end of the electrode 201. You may press with a jack etc. with respect to the terminal of 201). Specifically, for example, a plurality of metal connectors 204 are attached to a frame in which an elongated member made of an insulator such as metal or wood is woven into a lattice shape. The contact portions of the plurality of connectors 204 with the electrodes 201 are attached to the lattice-shaped frame so as to be arranged on the same plane. The contact portions of the plurality of connectors 204 with the electrodes 201 are arranged at the same interval as the arrangement of the plurality of electrodes 201 of the electrode 200. The connector unit 203 comprised in this way is urged with the jack etc. with respect to the terminal end of the electrode 201 so that the said contact part of each connector 204 and the terminal end of each electrode 201 may contact. By doing in this way, the connector 204 of several electrode 201 can be collectively attached and detached quickly, and attachment of the electrode 201 can be performed quickly. Therefore, the electrode 201 can be added without lowering the temperature of the molten glass G in the dissolution tank 101 as much as possible.

(4-2)

In the above embodiment, the electrode 201 was made of tin oxide. However, in another embodiment, as long as the electrode 201 is a conductive metal at a high temperature, it may be made of another metal, and the electrode 201 preferably includes at least one of tin oxide, molybdenum, and zirconium oxide.

(4-3)

In the above embodiment, when the electrode 201 to the molten glass G is rapidly eluted, the lifetime of the electrode 201 and the melting furnace 101 is shortened, so it is preferable to reduce the amount of the electrode 201 to be eluted. Since the elution amount of the electrode 201 increases as the temperature of the electrode 201 increases, the elution amount of the electrode 201 can be suppressed by lowering the temperature of the electrode 201.

In order to reduce the elution amount of the electrode 201, the tip of the electrode 201 is preferably disposed at the same position as the wall surface X or outside the wall surface X. The wall surface X is the inner wall surface of the melting furnace 101, and is the surface of the fire resistant brick 111c which contacts the molten glass G. As shown in FIG. "The same position as the wall surface X" means that the shortest distance from the wall surface X to the tip of the electrode 201 is less than 5 mm. The "outer side of the wall surface X" means that the tip of the electrode 201 is preferably disposed outside of the wall surface X by 5 mm or more, more preferably outside of the wall surface X by 7 mm or more, and more preferably It means that it is arranged outside at least 10 mm from the wall surface X. In order to prevent the molten glass G from leaking from the melting furnace 101, the tip of the electrode 201 is preferably 10 mm or more, more preferably 15 mm or more from the outer wall surface of the melting furnace 101, More preferably, it is 20 mm or more apart.

By disposing the electrode 201 at the same position as the wall surface X or outside the wall surface X, the contact area between the electrode 201 and the molten glass G is reduced, and the melting furnace 101 is lower than the molten glass G. Since the tip of the electrode 201 is close to the outer wall surface, the temperature of the surface of the electrode 201 in contact with the molten glass G can be lowered, and the amount of elution of the electrode 201 can be reduced. In addition, the outer wall surface of the melting furnace 101 may be cooled. In this case, since the current density flowing in each portion of the tip of the electrode 201 decreases, and the temperature of each portion of the tip of the electrode 201 decreases, the amount of elution of the electrode 201 can be reduced.

From the viewpoint of reducing the elution amount of the electrode 201, it is preferable to arrange the tip of the electrode 201 outside the wall surface X. As a result, the temperature of the electrode 201 can be further lowered than when the distal end of the electrode 201 is arranged at the same position as the wall surface X, so that elution of the electrode 201 can be further suppressed. For example, the tip of the electrode 201 is first placed outside the wall surface X, and the tip of the electrode 201 is located outside the wall X by erosion, and then the tip of the electrode 201 is located outside the wall X. The electrode 201 may be press-fitted so as to be positioned.

In addition, from the viewpoint of reducing the elution amount of the electrode 201 and the refractory brick 111c, it is preferable to arrange the tip of the electrode 201 at the same position as the wall surface X. If the tip of the electrode 201 is disposed outside the wall surface X, the respective portions of the refractory brick 111c are intensively eroded, so that foreign matters such as zirconia are eluted from the refractory brick 111c, but the electrode 201 is increased. This can be suppressed by arrange | positioning the tip of () in the same position as the wall surface X. For example, the tip of the electrode 201 is first placed at the same position as the wall surface X, and the tip of the electrode 201 is located outside the wall X by erosion, and then the tip of the electrode 201 is aligned with the wall surface X. The electrode 201 may be press-fitted to be in the same position.

As another example, the tip of the electrode 201 is first placed at the same position as the wall surface X, and the tip of the electrode 201 is located outside the wall X by erosion, and then the tip of the electrode 201 is wall X. The electrode 201 may be press-fitted so as to be located outside, and the electrode 201 is first placed outside the wall surface X, and the electrode 201 is further positioned outside by the erosion. The electrode 201 may be press-fitted so that the tip of the 201 is at the same position as the wall surface X.

100: glass manufacturing apparatus
101: melting tank (melting furnace)
111, 111a, 111b: wall
111c: refractory bricks (refractory)
200: electrode
201, 201a, 201b: electrode
202, 204: Connector

Claims (12)

As a method for producing glass in which a glass raw material is introduced to dissolve the glass in a melting furnace formed by stacking at least a pair of electrodes and a plurality of refractory materials,
The pair of electrodes comprises a conductive metal under high temperature,
A method for manufacturing a glass, characterized in that the electrode is held by a surrounding refractory so that the electrode can be moved by pressing so that the tip of the electrode is in a predetermined position. The method of claim 1,
A method for producing a glass, wherein the conductive metal at least contains at least one of tin oxide, molybdenum and zirconium oxide. The method according to claim 1 or 2,
A method for producing glass, wherein the refractory decay means of the refractory is carried out in the melting furnace. The method of claim 3,
The said anti-collapsing means arranges the other electrode adjacent to the back of the said electrode, The manufacturing method of the glass characterized by the above-mentioned. 5. The method according to any one of claims 1 to 4,
The temperature of the molten glass in the said melting furnace is 1500 degreeC or more, The manufacturing method of the glass characterized by the above-mentioned. The method according to any one of claims 1 to 5,
And said electrode is a composite in which a plurality of electrodes are integrated. 7. The method according to any one of claims 1 to 6,
The said electrode is a composite which integrated the some electrode, and is pressed from the outer side of a melting furnace, The manufacturing method of the glass characterized by the above-mentioned. 8. The method according to any one of claims 1 to 7,
The predetermined position of the tip of the electrode is the same position as the surface of the refractory in contact with the molten glass, or the inner side of the surface of the refractory. 8. The method according to any one of claims 1 to 7,
The predetermined position of the tip of the electrode is the same position as the surface of the refractory in contact with the molten glass, or the outer side of the surface of the refractory. As a method for producing glass in which a glass raw material is introduced into a melting furnace formed by stacking a pair of electrodes and a plurality of refractory materials to dissolve the glass,
The pair of electrodes comprises a conductive metal under high temperature,
And a step of heating the glass existing in the gap between the electrode and the surrounding brick when the electrode held by the surrounding refractory is moved to the predetermined position so that the tip of the electrode is movable to the predetermined position. The manufacturing method of the glass characterized by the above-mentioned. As a method for producing glass in which a glass raw material is introduced to dissolve the glass in a melting furnace formed by stacking at least a pair of electrodes and a plurality of refractory materials,
The pair of electrodes comprises a conductive metal under high temperature,
A method for producing a glass, wherein the electrode is provided with a force that resists the internal pressure of the glass in the melting furnace so that the tip of the electrode is in a predetermined position. The method of manufacturing the glass substrate for flat panel displays by shape | molding the glass manufactured using the manufacturing method of the glass of any one of Claims 1-11 to sheet shape.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110698040A (en) * 2019-10-12 2020-01-17 彩虹集团（邵阳）特种玻璃有限公司 Butt joint method for cover plate glass tank furnace electrodes

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5864734B2 (en) * 2013-03-27 2016-02-17 ＡｖａｎＳｔｒａｔｅ株式会社 Glass substrate manufacturing method and glass substrate manufacturing apparatus
JP6263355B2 (en) * 2013-09-06 2018-01-17 ＡｖａｎＳｔｒａｔｅ株式会社 Glass melting apparatus, glass sheet manufacturing apparatus, electrode for glass melting apparatus, and glass sheet manufacturing method
JP6263354B2 (en) * 2013-09-06 2018-01-17 ＡｖａｎＳｔｒａｔｅ株式会社 Glass melting apparatus and glass sheet manufacturing method
CN109399894B (en) * 2018-11-14 2021-10-29 东旭光电科技股份有限公司 Electrode brick propelling method for glass kiln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815631U (en) * 1981-07-24 1983-01-31 株式会社ニコン Melting furnace electrode
JPH0653780A (en) * 1992-07-31 1994-02-25 Nec Corp Adaptive receiver
JP2003292323A (en) 2002-04-01 2003-10-15 Nippon Electric Glass Co Ltd Glass-fusing furnace and glass-fusing method
JP2011063503A (en) * 2009-08-18 2011-03-31 Hoya Corp Method for manufacturing glass, glass melting furnace, glass manufacturing device, method for manufacturing glass blank, method for manufacturing substrate for information recording medium, method for manufacturing information recording medium, method for manufacturing substrate for display, and method for manufacturing optical component

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3391236A (en) * 1965-07-06 1968-07-02 Emhart Corp Electrode holder for glass melting furnace
US3634588A (en) * 1970-05-28 1972-01-11 Toledo Engineering Co Inc Electric glass furnace
JPS58156543A (en) * 1982-03-12 1983-09-17 Toshiba Corp Production of molybdenum electrode structure
JPS5926930A (en) * 1982-08-02 1984-02-13 Toshiba Corp Molybdenum electrode structure and its manufacture
JPS6053780A (en) * 1983-09-05 1985-03-27 大同特殊鋼株式会社 Controller for insertion of electrode into direct conductiontype melting treating furnace
JPH0648142B2 (en) * 1989-04-04 1994-06-22 新日本製鐵株式会社 Wall electrodes of DC arc furnace
JPH0594871A (en) * 1991-09-30 1993-04-16 Kawasaki Steel Corp Bottom electrode device for dc electric furnace
FR2815339B1 (en) * 2000-10-18 2003-01-10 Saint Gobain Isover ELECTRIC GLASS FURNACE, WITH PIVOTING WALL ELEMENTS
JP2003183031A (en) * 2001-12-18 2003-07-03 Nippon Electric Glass Co Ltd Electric melting furnace for manufacturing glass fiber and method of melting glass for glass fiber
JP2004315350A (en) * 2003-04-01 2004-11-11 Motoaki Miyazaki Direct energizing glass melting deep bottom type furnace and method of clarifying/supplying glass
KR20070032607A (en) * 2005-09-19 2007-03-22 쇼오트 아게 Glass melting electrode and glass or glass ceramic melting method
DE102006003535A1 (en) * 2006-01-24 2007-08-02 Schott Ag Heat treatment of melt, especially in refining (sic) device where melt is heated by ohmic resistor, used as refining and/or melting module, which can include Overflow-Downflow homogenization unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815631U (en) * 1981-07-24 1983-01-31 株式会社ニコン Melting furnace electrode
JPH0653780A (en) * 1992-07-31 1994-02-25 Nec Corp Adaptive receiver
JP2003292323A (en) 2002-04-01 2003-10-15 Nippon Electric Glass Co Ltd Glass-fusing furnace and glass-fusing method
JP2011063503A (en) * 2009-08-18 2011-03-31 Hoya Corp Method for manufacturing glass, glass melting furnace, glass manufacturing device, method for manufacturing glass blank, method for manufacturing substrate for information recording medium, method for manufacturing information recording medium, method for manufacturing substrate for display, and method for manufacturing optical component

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110698040A (en) * 2019-10-12 2020-01-17 彩虹集团（邵阳）特种玻璃有限公司 Butt joint method for cover plate glass tank furnace electrodes

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