KR101634417B1 - Method of manufacturing glass - Google Patents

Method of manufacturing glass Download PDF

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KR101634417B1
KR101634417B1 KR1020120082390A KR20120082390A KR101634417B1 KR 101634417 B1 KR101634417 B1 KR 101634417B1 KR 1020120082390 A KR1020120082390 A KR 1020120082390A KR 20120082390 A KR20120082390 A KR 20120082390A KR 101634417 B1 KR101634417 B1 KR 101634417B1
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South Korea
Prior art keywords
electrode
glass
electrodes
refractory
tip
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KR1020120082390A
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KR20130014037A (en
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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

A method of manufacturing a glass that enables the furnace to have a wall with electrodes provided thereon. A glass manufacturing method for melting a glass by introducing a glass raw material into a melting furnace having walls formed by laminating at least a pair of electrodes (200) and a plurality of refractory bricks (111c). The electrode 201a constituting the electrode 200 includes tin oxide in the raw material composition. And the electrode 201a is held by the surrounding refractory bricks 111c so that the tip of the electrode 201 is at a predetermined position.

Description

[0001] METHOD OF MANUFACTURING GLASS [0002]

The present invention relates to a method for producing glass. The present invention also relates to a method of manufacturing a glass substrate for a flat panel display (FPD), particularly a glass substrate for a liquid crystal display (LCD).

Conventionally, as a heating method of molten glass in a glass melting furnace, a radiant heat of a gas flame and a direct current method have been used. In the direct energization method, molten glass is energized between opposing electrodes, and the molten glass is heated by the heat generated by energization.

In the above-mentioned production of the glass of the glass substrate for FPD, a direct current method with the gas flame has been used as the 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 has a high electric resistance, It is necessary to increase the size of the electrode. At this time, platinum which has been conventionally used as an electrode for direct energization heating is a rare metal and has a high cost. In Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-292323), tin oxide or molybdenum, which is an inexpensive electrode material as compared with platinum, is used for an electrode.

Japanese Patent Application Laid-Open No. 2003-292323

However, the electrode using tin oxide or molybdenum has a problem in that the portion in contact with the molten glass is depleted by erosion. Generally, the glass melting furnace has a structure in which refractories are laminated, and the tin oxide or molybdenum electrode is embedded in the wall of the glass melting furnace with the surroundings surrounded by refractory materials. At this time, if the tin oxide or molybdenum electrode is tamped by erosion, the refractory stacked on the tin oxide or molybdenum electrode may collapse, making it impossible to use the glass melting furnace.

Therefore, an object of the present invention is to provide a method of manufacturing a glass which enables the furnace having electrodes to be lengthened.

A manufacturing method of a glass according to the present invention is a manufacturing method of a glass in which glass is dissolved by introducing a glass raw material into a melting furnace formed by laminating at least a pair of electrodes and a plurality of refractories, And the electrode is held by the surrounding refractory so that the electrode can be moved by pressure so that the tip of the electrode is at a predetermined position.

In addition, since the electrode can be moved by pressing so that the tip of the electrode is at a predetermined position, the collapse of the refractory laminated on the electrode can be prevented even if the electrode is eroded. Therefore, the present invention can provide a method of manufacturing a glass capable of lengthening a glass melting furnace provided with an electrode. It is preferable that the tip end of the electrode is located in the vicinity of the inner wall surface of the glass melting furnace. If the tip of the electrode is located in the vicinity of the inner wall surface of the glass melting furnace, even if the electrode is eroded, the refractory stacked on the electrode is not collapsed.

Further, in the method of manufacturing glass according to the present invention, it is preferable that the metal having conductivity at the high temperature includes at least one of tin oxide, molybdenum and zirconium oxide.

Further, in the method for producing glass according to the present invention, it is preferable that means for preventing the refractory from collapsing is applied in the melting furnace.

Further, in the method of manufacturing glass according to the present invention, it is preferable that the collapse preventing means is provided with another electrode adjacent to the rear of the electrode.

Further, in the method for producing glass according to the present invention, it is preferable that the temperature of the molten glass in the melting furnace is 1500 DEG C or higher.

Further, it is preferable that the method for producing glass according to the present invention is a composite in which electrodes are integrated with a plurality of electrodes.

Further, in the method for producing a glass according to the present invention, it is preferable that the electrode is pressed from the outside of the melting furnace as a composite body in which a plurality of electrodes are integrated.

The method for producing glass according to the present invention is a method for producing a glass in which glass is dissolved by introducing a glass raw material into a melting furnace obtained by laminating at least a pair of electrodes and a plurality of refractories, Wherein 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 moved to a predetermined position, And a step of heating the glass present in the gap of the refractory.

The method for producing a glass according to the present invention is a method for producing a glass in which glass is dissolved by introducing a glass raw material into a melting furnace obtained by laminating at least a pair of electrodes and a plurality of refractories, The electrode is made of a material containing a conductive metal and is held by applying a force against the internal pressure of the glass in the melting furnace so that the tip of the electrode is at a predetermined position.

Further, in the method of manufacturing glass according to the present invention, the obtained glass can be formed into a sheet shape to produce a glass substrate for a flat panel display.

When the glass manufacturing method according to the present invention is used, even if the electrode is abraded by the erosion of the molten glass in the glass melting furnace provided with the electrode, the refractory laminated on the electrode does not collapse, It is possible to provide a manufacturing method of glass.

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

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, the following description relates to an example of the present invention, and the present invention is not limited thereto.

(1) Overall configuration

Hereinafter, a method of manufacturing a glass plate for a glass substrate of a flat panel display will be described as an embodiment of a manufacturing method of glass according to the present invention.

(1-1) Raw materials of glass

In order to produce a glass plate according to the present invention, the glass raw material is first mixed so as to obtain a desired glass composition. For example, in the case of producing a flat panel display, particularly a glass substrate for a liquid crystal display (LCD), it is preferable to mix the raw materials so as to have the following composition.

(a) 50 to 70% by mass of SiO 2 ,

(b) 5 to 18 mass% of B 2 O 3 ,

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

(d) 0 to 10% by mass of MgO,

(e) 0 to 20% by mass of CaO,

(f) 0 to 20 mass% of SrO,

(o) BaO: 0 to 10 mass%

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

(q) R ' 2 O: 0 to 2.0 mass% (provided that R' is at least one selected from Li, Na, and K)

(r) at least one kind of metal oxide selected from tin oxide, iron oxide, and cerium oxide in a total amount of 0.05 to 1.5% by mass.

(1-2) Outline of glass manufacturing process

The outline of each process for producing glass will be described below with reference to Fig.

First, a melting process is performed. In this process, a glass raw material mixed so as to have the above composition is supplied to the melting tank 101 and heated to 1500 ° C or higher. The heated raw material is melted and becomes molten glass.

In the following cleaning process, the above-mentioned molten glass is cleaned in the blue oven 102. Specifically, the molten glass is heated in the blue sign 102, and the gas component contained in the molten glass forms bubbles or vaporizes and escapes out of the molten glass.

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

In the next molding step, the molten glass is supplied to the molding apparatus 104. In the molding apparatus 104, the glass is formed into a plate-like glass. In the present embodiment, the molten glass is continuously formed into a sheet shape by the overflow down-draw method. The molded sheet-like glass is cut into a glass plate.

(2) Detailed configuration

(2-1) Melter Details

The melting tank 101 will be described below with reference to Fig.

The melting tank 101 is provided with a liquid bath B and an upper space A constituted by refractory materials such as refractory bricks. The melting tank 101 is constituted by stacking a pair of electrodes 200 (one of which is not shown) and a plurality of refractory bricks 111c, and the electrodes and the refractory bricks are members constituting the melting tank have. On the wall surface of the upper space A of the melting tank 101, a burner 300 for 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 as the radiant heat emitted from the refractory material at a high temperature. In the liquid bath B, a plurality of pairs of electrodes 200 (one of which is not shown) are provided on two opposing walls 111a and 111b. The paired electrodes 200 (one of which is not shown) are provided in mutually opposing walls 111a and 111b of the liquid bath B of the dissolution tank 101. [ Specifically, in the wall 111a, an electrode 200 (not shown) is provided at a position facing each of the electrodes 200 provided on the wall 111b. Here, the pair of electrodes 200 are separated into a positive electrode and a minus electrode, and a current flows between positive and negative electrodes. At this time, positive and negative common electrodes may be provided on the bottom surface of the liquid bath B so that the electrodes on the wall and the positive and negative common electrodes on the bottom surface are paired. In Fig. 2, three pairs of electrodes 200 (one of which is not shown) are provided. By the paired electrode 200, the molten glass is energized to generate the joule heat from the molten glass itself. In the melting tank 101, the molten glass is heated to 1500 DEG C or higher.

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 integral electrode 200. The electrode 200 is embedded between the refractory bricks 111c and held by the refractory bricks 111c. Specifically, a plurality of electrodes 201a described later of the electrode 200 are stacked on the refractory brick 111c. A plurality of electrodes 201a are stacked on the plurality of electrodes 201a. Around the stacked electrode 201a, a refractory brick 111c is stacked to hold the electrode 201a. Further, the refractory brick 111c is also laminated on the electrode 201a. Each of the refractory bricks 111c has a substantially rectangular parallelepiped shape, and the electrode 201a also has a substantially rectangular parallelepiped. The refractory brick 111c and the electrode 201a are tangent to each other in their respective planes. The angle formed by the adjoining planes is 90 占 폚 or approximately 90 占 폚. Therefore, almost no clearance is formed between the electrode 201a and the refractory brick 111c. The melting vessel 101 receives the pressure toward the outside of the melting vessel 101 by the molten glass G in the melting vessel 101. Therefore, a constant pressure is applied to the outer wall of the dissolution tank 101 by a jack (not shown) or the like to press it against the inside of the dissolution tank 101. Further, a material as an adhesive material is not used between each of the stacked refractory bricks 111c and each of the electrodes 201a, but an adhesive material may be used if necessary.

(2-2) Details of electrodes

The electrode 200 and the electrode 201a will be described with reference to Fig. Hereinafter, in the melting vessel 101, the side on which the molten glass G is present is defined as the inside of the wall 111, and the opposite side of the inside thereof is outside or outside.

3 is an enlarged view of the wall 111 of the portion where the electrode 200 is installed. The electrode 200 has a plurality of electrodes 201a, as shown in Fig. The electrode 201a is a sintered body made of tin oxide or a sintered 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 other end of the electrode 201a facing the end of the electrode 201a (hereinafter referred to as the tip) faces the molten glass G located inside the wall 111 And is embedded between the refractory bricks 111c. The electrode 200 shown in Fig. 3 has a total of twelve electrodes 201a in which three horizontally arranged electrodes 201a are stacked vertically in four stages. 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 melting vessel 101 of the wall 111, Location.

The tip of the electrode 201a in contact with the molten glass G is subjected to pressure toward the outside of the melting vessel 101 by the molten glass G in the melting vessel 101. [ Therefore, a constant pressure is applied to the distal end of the electrode 201a by a jack (not shown) or the like, which is pressed toward the inside of the dissolution tank 101. [ That is, a force against the internal pressure of the molten glass in the melting tank 101 is given and held.

(2-3) Means for preventing collapse of refractory

Hereinafter, the refractory collapse preventing means according to the present invention will be described. Hereinafter, in the melting vessel 101, the side on which the molten glass G is present is defined as the inside of the wall 111, and the opposite side of the inside thereof is outside or outside.

As described above, although the molten glass is heated to 1500 DEG C or higher in the melting vessel 101, the electrode 201a constituting the electrode 200 for energizing the molten glass is also heated by contact with the molten glass heated by energization or high temperature, do. The tip of the electrode 201a is located outside the wall surface X when the electrode 201a is corroded due to the erosion of the heated electrode 201a. As described above, a plurality of refractory bricks 111c are stacked on the electrode 201a. Therefore, when the electrode 201a is tapered, there is a risk that the refractory brick 111c stacked thereon will collapse. In the state where the tip of the electrode 201a is located outside the wall surface X, the refractory brick 111c constituting the wall 111 is more likely to be energized than the molten glass, 200 are installed.

Therefore, the tip of the electrode 201a is positioned at the same position as the wall surface X, or the inside of the wall surface X, that is, the inside of the molten glass G . More specifically, first, the electrode 201a is heated. Since the electrode 201a is cooled by injecting air from its end, when the cooling is stopped, the electrode 201a is heated. As described above, although there is almost no clearance between the electrode 201a and the refractory brick 111c, the molten glass slightly penetrates between the electrode 201a and the refractory brick 111c and is hardened. The glass is heated by heating the electrode 201a, and the viscosity is lowered. The glass with reduced viscosity becomes a lubricant for relieving 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 to the inside of the wall 111, that is, the molten glass G in the melting vessel 101 by a jack or the like. At this time, the plurality of electrodes 201a are uniformly pressed from the outside of the melting furnace. The pushing force can be obtained by using a worm jack, which is necessary for moving the electrode 201. In addition, the required pressing force can calculate the required load from the molten glass liquid pressure in the furnace and the weight of the oxidizing electrode. Thus, the collapse of the refractory brick 111c stacked on the electrode 201a, that is, the collapse of the wall 111 of the melting vessel 101, can be prevented as much as possible. However, when the electrode 201a continues to be eroded, the electrode 201a is eventually abated and the electrode 201a which moves to the wall surface X or to the inner side than the electrode 201a disappears. Therefore, a new electrode is disposed behind the electrode 200. [ Specifically, for example, as shown in Fig. 5A, the electrode 201a is eroded and tapered so that the distal end of the electrode 201a does not protrude from the outer surface of the wall 111 The electrode 201b which is a new electrode 201 different from the electrode 201a is formed so that the tip of the electrode 201b is connected to the end 201a of the electrode 201a as shown in Figure 5 (b) Respectively. That is, a new electrode 201b is added to the end of the existing electrode 201a. When the additional electrode 201b is corroded and tapered, the addition of a new electrode 201b may be repeated. As a result, even if the life of the electrode 201a is short, the collapse of the refractory brick 111c, that is, the collapse of the wall 111, can be prevented as much as possible. That is, the electrodes 200 and the melting tank 101 can be lengthened.

When a new electrode 201b is attached to the end of the electrode 201a, the connector 202 attached to the end of each electrode 201a is removed. When another new electrode 201b is attached to the end of the electrode 201a, the connector 202 is attached to the end of the attached electrode 201b. The end of the electrode 201b attached thereto is pressed by a jack or the like with a certain pressure toward the end of the electrode 201a so that the end of the electrode 201a and the tip of the electrode 201b are in contact with each other.

2, in which a plurality of pairs of electrodes 200 are provided, the three pairs of electrodes 200 are connected to each other by a pair of electrodes In the case of the dissolving tank 101 provided, a new electrode 201 may be added for each pair of electrodes 200. Thereby, the electrode 201 can be added without reducing the temperature of the molten glass G as much as possible.

(3) Features

(3-1)

In the above embodiment, the electrode 200 is provided between the refractory bricks 111c stacked and held by the refractory bricks 111c. That is, the electrode 200 directly contacts the refractory brick 111c. Thus, it is possible to prevent the wall 111 of the dissolution tank 101 from making a gap as small as possible.

(3-2)

The electrode 201a is moved toward the molten glass G in the melting vessel 101 so that the tip of the electrode 201a is positioned at a predetermined position . The predetermined position indicates the position of the tip of the electrode in the vicinity of the inner wall surface of the glass melting furnace. Concretely, the position of the inside of the glass melting furnace in the vicinity of the wall surface is preferably the same position as the inside wall surface X of the wall 111, or more inward than the inside wall surface X. However, the position where the stacked refractory bricks 111c do not collapse It may be located outside the wall surface X of the wall 111. [ As a result, it is possible to prevent the refractory bricks 111c of the wall 111 from collapsing as much as possible, thereby lengthening the melting vessel 101. Further, if the tip of the electrode protrudes excessively inward than the inner wall surface X of the wall 111, the amount of erosion of the electrode becomes large, shortening the life of the electrode, and is not preferable from the viewpoint of lengthening the melting furnace.

(3-3)

In the above embodiment, a new electrode 201b is attached to the end of the electrode 201a. That is, another electrode is disposed adjacent to the rear side of the electrode 200. That is, even when the electrode 201a is tapered, the electrode 201b, which is a new electrode 201, is added, and the electrode 200 is lengthened. As a result, it is possible to prevent the refractory bricks 111c of the wall 111 from collapsing as much as possible, thereby lengthening the melting vessel 101.

(3-4)

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

(4) Variations

(4-1)

In the above embodiment, when a new electrode 201b is attached 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 configured to be more easily removed. 6, a connector unit 203 attached to a frame or the like integrated with a connector 204 of a plurality of electrodes 201 is connected to the electrode (not shown) of the electrode 201 201 by a jack or the like. Specifically, a plurality of connectors 204 made of metal are attached to a frame in which elongated members of an insulation system such as metal or wood are woven in a lattice form. 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 configured as described above is pressed by a jack or the like against the distal end of the electrode 201 so that the contact portion of each connector 204 and the end of each electrode 201 are in contact with each other. By doing so, the connectors 204 of the plurality of electrodes 201 can be rapidly attached and detached together, and the electrodes 201 can be added quickly. Therefore, the electrode 201 can be added without reducing the temperature of the molten glass G in the melting tank 101 as much as possible.

(4-2)

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

(4-3)

It is preferable to reduce the amount of elution of the electrode 201 since the life of the electrode 201 and the melting furnace 101 becomes shorter if the elution of the electrode 201 into the molten glass G is earlier. Since the elution amount of the electrode 201 increases as the temperature of the electrode 201 increases, the amount of elution 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, it is preferable that the tip of the electrode 201 is 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 refractory brick 111c in contact with the molten glass G. Means that the shortest distance from the wall surface X to the tip of the electrode 201 is less than 5 mm. The term " outside the wall X " means that the tip of the electrode 201 is disposed at least 5 mm outside the wall X, more preferably at least 7 mm outside the wall X, , And 10 mm or more 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 preferably extends from the outer wall surface of the melting furnace 101 by preferably 10 mm or more, more preferably 15 mm or more, More preferably, it is 20 mm or more apart.

The contact area between the electrode 201 and the molten glass G is reduced and the melting point of the melting furnace 101 at a temperature lower than that of the molten glass G is reduced by arranging the electrode 201 at the same position as the wall surface X or outside the wall surface X. [ 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 because the tip of the electrode 201 is close to the outer wall surface. The outer wall surface of the melting furnace 101 may be cooled. In this case, the current density flowing in each corner of the tip of the electrode 201 is reduced and the temperature of each corner of the tip of the electrode 201 is lowered, so that 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 on the outer side of the wall surface X. [ Accordingly, the temperature of the electrode 201 can be further lowered than when the tip of the electrode 201 is disposed at the same position as the wall surface X, so that the elution of the electrode 201 can be further suppressed. For example, the tip of the electrode 201 is located outside of the wall surface X at the beginning, and the tip of the electrode 201 is located further outward due to erosion, The electrode 201 may be press-fitted.

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 corners of the refractory brick 111c are intensively eroded to increase the possibility of foreign matter such as zirconia being eluted from the refractory brick 111c. However, Is disposed at the same position as the wall surface X, this can be suppressed. The tip of the electrode 201 is positioned at the same position as the wall surface X and the tip of the electrode 201 is located outside the wall surface X by erosion, The electrode 201 may be pressed into the same position.

As another example, when the tip of the electrode 201 is positioned at the same position as the wall surface X and the tip of the electrode 201 is located outside the wall surface X by erosion, The tip of the electrode 201 may be disposed outside the wall surface X and the tip of the electrode 201 may be located further outward due to erosion, The electrode 201 may be press-fitted so that the front end of the electrode 201 is positioned at the same position as the wall surface X.

100: Glass manufacturing apparatus
101: Melting bath (melting furnace)
111, 111a, 111b: wall
111c: Refractory brick (refractory)
200: electrode
201, 201a, 201b: electrode
202, 204: connector

Claims (12)

A method for producing a glass in which glass is dissolved by introducing a glass raw material into a melting furnace formed by laminating at least a pair of electrodes and a plurality of refractories,
Wherein the pair of electrodes comprises a conductive metal under high temperature,
Wherein the electrode is held by the surrounding refractory so that the tip of the electrode is in a predetermined position and the electrode is movable by a pushing force and the electrode is held in the gap between the electrode and the surrounding refractory, Wherein the glass is heated. The method according to claim 1,
Wherein the metal having conductivity at the high temperature comprises at least one of tin oxide, molybdenum and zirconium oxide. 3. The method according to claim 1 or 2,
Wherein the means for preventing collapse of the refractory is provided in the melting furnace. The method of claim 3,
Wherein the collapse preventing means has another electrode disposed adjacent to the rear of the electrode. 3. The method according to claim 1 or 2,
Wherein the temperature of the molten glass in the melting furnace is 1500 DEG C or higher. 3. The method according to claim 1 or 2,
Wherein the electrode is a composite in which a plurality of electrodes are integrated. 3. The method according to claim 1 or 2,
Wherein the electrode is a composite body in which a plurality of electrodes are integrated, and is pressed from the outside of the melting furnace. 3. The method according to claim 1 or 2,
Wherein the predetermined position of the tip of the electrode is located at the same position as the surface of the refractory contacting with the molten glass or inside the surface of the refractory. 3. The method according to claim 1 or 2,
Wherein the predetermined position of the tip of the electrode is located at the same position as the surface of the refractory contacting with the molten glass or outside the surface of the refractory. A glass manufacturing method for melting a glass by introducing a glass raw material into a melting furnace formed by laminating a pair of electrodes and a plurality of refractories,
Wherein the pair of electrodes comprises a conductive metal under high temperature,
And heating the glass existing in the gap between the electrode and the surrounding brick when moving the electrode held by the surrounding refractory so that the tip of the electrode moves to a predetermined position to a predetermined position ≪ / RTI > A method for producing a glass in which glass is dissolved by introducing a glass raw material into a melting furnace formed by laminating at least a pair of electrodes and a plurality of refractories,
Wherein the pair of electrodes comprises a conductive metal under high temperature,
The electrode is held by being given a force against the internal pressure of the glass in the melting furnace so that the tip of the electrode is in a predetermined position and the glass existing in the gap between the electrode and the refractory around it is heated By weight. A method for producing a glass substrate for a flat panel display by molding the glass produced by the manufacturing method of glass according to any one of claims 1, 2, 10 and 11 into a sheet shape.
KR1020120082390A 2011-07-27 2012-07-27 Method of manufacturing glass KR101634417B1 (en)

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