KR100822285B1 - Glass melting apparatus - Google Patents

Abstract

A glass melting apparatus is provided to melt desired glass composition in each different melting furnace by employing a removable heating cover, and to prevent inner wall of the furnace from crack generation concurrently with inhibiting the crack from penetrating into the wall for repair by employing inner wall of fire resistive material and cooling means. A glass meting apparatus comprises a melting furnace(100), a removable heating cover(200) and a raw material inlet(300). The melting furnace(100) has a duplex wall consisting of an outer wall(102) having reservoir for fed glass melting raw material(106) inside and an inner wall(104) which is formed on the surface of the reservoir of the outer wall(102). The surface of the inner wall(104) is cooled so as to maintain lower temperature than the melting point of the melting raw material. The melting furnace(100) optionally has a dam wall(108) in order to prevent the unmelted raw material from discharging through an outlet(110). The melting furnace(100) optionally has cooling jacket on the outer wall(102) or between the outer wall(102) and the inner wall(104) for heat exchange. The removable heating cover(200) having a heating unit(202) is located on at least one melting furnace(100). The raw material inlet(300) has a sleeve(304) for supplying the melting furnace(100) with glass melting raw material, and a cooling unit(302) surrounds the sleeve(304). The cooling means(302) is a cooling jacket or a cooling coil.

Description

Glass Melting Apparatus {GLASS MELTING APPARATUS}

1 shows a glass melting apparatus according to a first embodiment of the present invention.

2 is a view showing an application example of the glass melting apparatus according to the present invention.

3 shows a glass melting apparatus according to a second embodiment of the present invention.

** Brief description of the major reference symbols **

100: melting furnace 102: outer wall

104: inner wall 108: dam wall

110: outlet 120: cooling jacket

200: heating cover 202: heating means

300: raw material input unit 302: cooling means

304: sleeve

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melting furnace for heating and melting raw materials, and more particularly, to a glass melting apparatus for heating and melting a glass melt raw material.

Glass melting apparatus consisting of raw material supply device, melting furnace, heating means and molding apparatus is used for manufacturing barrier materials, dielectric materials, electrode materials, sealing materials or vacuum fluorescent displays, cathode ray tubes, backlight units, and field emission display modules in plasma display panels. It is used to prepare frit paste, which is used to heat glass melt raw materials used for glass fiber, rear glass of cathode ray tube and cover glass.

The conventional glass melting apparatus includes a melting furnace having a receiving portion in which the glass melt raw material is melted, and a heating cover provided with heating means coupled to the melting furnace to heat the glass melt raw material in the receiving portion.

In the conventional glass melting apparatus, since the heating cover has a structure combined with the melting furnace, in order to produce glass products having different compositions, the method of heating the melting furnace and discharging the glass melt raw materials of different compositions into the melting furnace is adopted. Alternatively, a method of installing a melting furnace in which glass melt raw materials of different compositions are melted in a production facility and producing glass products in each melting furnace is adopted.

In the former case, the installation is simple and the manufacturing cost is low, but in order to produce a glass product having a different composition, there is a disadvantage that a preparation process for changing the composition is required, such as stopping the operation of the melting furnace and exchanging the inner wall of the melting furnace. On the other hand, in the latter case, there is an advantage that the preparation process for changing the composition is minimized, but the disadvantage is that the equipment is complicated and the manufacturing cost increases.

The technical problem to be achieved by the present invention is to provide a glass melting apparatus that can be melted while exchanging the glass product of the desired composition.

The technical problem to be achieved by the present invention is to provide a glass melting apparatus capable of producing glass products using other melting furnaces without interrupting the operation of the melting furnace in order to produce a glass product having a different composition and a different composition.

In order to achieve the above technical problem, the present invention provides a glass melting apparatus having a melting furnace and a heating cover detachable from the melting furnace. The apparatus has a receiving portion in which the raw material of the glass melt is melted, and includes a melting furnace composed of an outer wall and an inner wall of a refractory material.

The apparatus includes a raw material inlet for injecting the raw material of the glass melt into the accommodating part of the melting furnace, and a heating cover provided to be detachably attached to the melting furnace. A heating means may be provided inside the heating cover to heat the glass melt raw material in the melting furnace accommodating portion.

In one embodiment of the invention, the apparatus may comprise a plurality of melting furnaces. However, a heating cover is not coupled to each of the melting furnaces, and one heating cover may be detachably attached to the plurality of melting furnaces to selectively heat the glass melt raw materials in the melting furnaces.

In one embodiment of the present invention, the melting furnace is provided with a cooling jacket capable of heat exchange. The cooling jacket may be installed on the outer wall of the metal material and may have a configuration capable of heat exchange with the inner wall of the refractory material. Alternatively, the cooling jacket may be installed between the outer wall and the inner wall. The refrigeration jacket can suppress the temperature of the refractory to rise above a certain level to prevent cracking of the refractory due to high temperature, and even if a crack occurs in the refractory, the melt penetrated through the crack is cooled to prevent further melt penetration. You can stop it.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed subject matter is thorough and complete, and that the spirit of the present invention to those skilled in the art will fully convey. In the drawings, the size of structures is exaggerated for clarity. In addition, where a structure is said to be "on" another structure, it may be in direct contact with another structure or intervened by a third component therebetween. Portions denoted by like reference numerals denote like elements throughout the specification.

1 is a view showing a glass melting apparatus according to a first embodiment of the present invention.

Referring to FIG. 1, the glass melting apparatus includes a melting furnace 100, a heating cover 200, and a raw material input part 300. The melting furnace 100 may be composed of an outer wall 102 and an inner wall 104. In addition, the glass melting apparatus may have operating devices that can be installed in a common melting apparatus such as a temperature sensor, a flow meter and a control system.

The outer wall 102 of the melting furnace may be formed of a general metal material. For example, the outer wall of the melting furnace may be an industrial metal material such as stainless steel, iron, copper, or an expensive precious metal such as platinum, gold, or silver.

The inner wall 104 of the melting furnace may be formed of a refractory material of a magnetic or ceramic series having a low cost, strong heat resistance, excellent corrosion resistance. The inner wall 104 of the melting furnace is preferably composed of a refractory block is a configuration that can be removed and reinstalled after a predetermined amount or more of the melting process.

The melting furnace 100 has an accommodating portion in which the glass melt raw material 106 is injected and melted in an open shape at an upper portion thereof. As shown, the melting furnace 100 has a double wall structure consisting of an outer wall 102 having a receiving portion and an inner wall 104 formed on the surface of the receiving portion of the outer wall 102. Since the glass melt raw material introduced into the receiving part of the melting furnace is generally supplied in powder form, a dam wall 108 that crosses the receiving part may be provided to prevent the glass melt material from being discharged through the outlet 110 of the melting furnace in an unmelted state. Can be. It is preferable that a plurality of dam walls 108 are provided in the melting furnace 100 to block the flow of the unmelted raw material of the glass melt.

The heating cover 200 is located on the melting furnace 100 to heat the glass melt raw material in the receiving portion. In the present invention, the heating cover 200 may heat the glass melt material of the melting furnace 100 in a detachable structure without being coupled to the melting furnace 100. The heating cover 200 is provided with heating means 202 for heating the glass melt raw material. The heating means 202 is preferably electric heating means spaced from the glass melt, such as resistance heating or induction heating. The heating means 202 may be a heating means such as a gas burner or a plasma torch.

The raw material input part 300 may include a sleeve 304 in which a powdered glass melt raw material is supplied to the melting furnace 200, and the glass melt raw material is in the sleeve 304 due to the high temperature of the melting furnace. Cooling means 302 may be formed to wrap around the sleeve 304 to prevent it from melting.

The refrigerant used in the cooling means 302 is not particularly limited, but is preferably water in consideration of economy and heat capacity. The cooling means 302 may have a jacket structure surrounding the sleeve 304 or may be in the form of a cooling coil wound around the sleeve 304.

In the present invention, the heating cover 200 is not attached to the melting furnace 100, it is characterized in that it is installed to be removable. Therefore, the heating cover 200 may move on the plurality of melting furnaces and selectively heat the melting furnaces.

It is a figure for demonstrating the application example of the glass melting apparatus which concerns on this invention.

Referring to FIG. 2, the glass melting apparatus of the present invention includes a plurality of melting furnaces 100 and a heating cover 200 that is movable to selectively heat the glass melt raw materials in the plurality of melting furnaces 100.

The heating cover 200 is coupled to an arbitrary melting furnace 100 to heat and melt the glass melt raw material, and move to a second position 200 ′ to heat the glass melt raw material of a different composition, and then to another melting furnace 100. The glass melt raw material supplied to ') can be heated and melted. When heating and melting of raw materials are required in a plurality of melting furnaces to produce glass products having different compositions, the number of heating means can be reduced by installing a plurality of melting furnaces and movably installing the heating cover or melting furnaces. Other melt raw materials may be selectively melted.

3 is a view showing a glass melting apparatus according to a second embodiment of the present invention.

Referring to FIG. 3, the melting furnace 100 of the glass melting apparatus according to the first embodiment includes an outer wall 102 and an inner wall 104, and the inner wall 104 is formed of a refractory material. The inner wall 104 of the refractory material may have problems such as penetration of the melt and explosion through cracks at high temperature. The second embodiment of the present invention is a means for solving the problem, it is possible to suppress the occurrence of cracks on the inner wall 104 of the melting furnace 100 by installing a cooling jacket 120 in the melting furnace (100).

The cooling jacket 120 may be a circulation structure of the refrigerant, and the refrigerant used is not particularly limited. Like the refrigerant of the aforementioned sleeve cooling means, in consideration of heat capacity and economic efficiency, the refrigerant of the cooling jacket 120 is preferably water.

If the cooling jacket 120 is too close to the receiving portion of the melting furnace to cool to the melt in the receiving portion, it is difficult to increase the temperature of the melt to the desired temperature of about 1400 ℃ due to the extreme heat consumption of the melt. . Therefore, the cooling jacket 120 is preferably used as an auxiliary means for suppressing the temperature rise of the inner wall 104 of the furnace by heat-exchanging with the inner wall 104 of the refractory material. In the present invention, the cooling jacket 120 is installed on the outer wall 102 of the furnace to suppress the temperature rise of the inner wall 104 of the furnace. Alternatively, unlike the drawing, the cooling jacket may be installed between the outer wall and the inner wall.

Although it is suppressed that the temperature of the inner wall 104 of the refractory material is increased by the cooling jacket 120, cracks may occur in the inner wall 104 due to various factors. However, even if the glass melt penetrates into the crack, it is cooled by the cooling jacket 120 and solidified, so that further glass melt penetration can be suppressed, and cracks can be repaired by the solidified glass material.

In addition, the temperature of the melt on the inner wall surface through heat exchange with the inner wall 104 may be controlled to be lower than the melting point. In this case, a glass solid may be formed on the surface of the inner wall 104 of the refractory material, and erosion of the refractory may also be suppressed.

Like the first embodiment, the glass melting apparatus according to the second embodiment also has a detachable heating cover 200, and can be applied to heat the glass melt raw materials of different compositions while replacing the melting furnace as shown in FIG. .

According to the present invention as described above, by using a different furnace without complicated equipment and without stopping the operation of the furnace, it can be melted while replacing the glass product of the desired composition.

In addition, the melting furnace is equipped with a refractory inner wall and a cooling jacket to directly cool the glass melt, thereby suppressing the temperature rise of the inner wall of the refractory and preventing cracks, without excessively consuming heat of the melt. Even in this case, the glass melt penetrated through the crack may be cooled by the cooling jacket to suppress further melt penetration and to repair the crack.

Claims (7)

A melting furnace having an accommodating portion in which the raw material of the glass melt is melted and composed of an outer wall and an inner wall of a refractory material; A raw material input unit which inputs a raw material of a glass melt to a receiving part of the melting furnace; A heating cover installed to be detachable from the melting furnace; And The glass melting apparatus provided in the said heating cover and provided with the heating means which heats the glass melt raw material in the said melting furnace accommodation part. The method according to claim 1, With a plurality of melting furnaces, And the heating cover is detachably attached to the plurality of melting furnaces to selectively heat the glass melt raw materials in the melting furnaces. The method according to claim 1, The melting furnace has a cooling jacket capable of heat exchange, characterized in that the glass melting apparatus. The method according to claim 3, The cooling jacket is installed on the outer wall of the glass melting apparatus, characterized in that heat exchange with the inner wall of the refractory material. The method according to claim 3, The cooling jacket is formed between the outer wall and the inner wall is a glass melting apparatus, characterized in that heat exchange with the inner wall of the refractory material. The method according to claim 3, With a plurality of melting furnaces, And the heating cover is detachably attached to the plurality of melting furnaces to selectively heat the glass melt raw materials in the melting furnaces. The method according to claim 3, And the surface of the inner wall is cooled to be maintained at a temperature lower than the melting point of the melt raw material.

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