KR20130068324A - Electric apparatus for smelting glass - Google Patents

Abstract

PURPOSE: An electromelting apparatus of glass is provided to improve the melting quality of glass and save energy consumption using an indirect heating operation and a direct heating operation. CONSTITUTION: An electromelting apparatus of glass includes a supplying unit(140), and a melting furnace(100). The supplying unit supplies mixed inorganic glass materials. One or more heating elements are arranged in the melting furnace and melts the materials in a melting tank(101). The heating elements include a first heating element(111) and a second heating element(113). The first heating element is adjacently arranged to the melting tank and indirectly heats the materials based on the radiant heat. The second heating element is installed in the melting tank and directly heats the materials. The first heating element is a super kanthal(MoSi2) heating element. The second heating element is an electrode based on one of molybdenum(Mo), tin oxide(SnO2), and platinum(Pt).

Description

ELECTRIC APPARATUS FOR SMELTING GLASS

The present invention relates to an electric furnace for melting glass, and more specifically, to an electric furnace having indirect heating by the upper heating element of the furnace and direct heating by the heating element inside the furnace, energy saving is possible, and high melting of the glass Quality can be obtained, and in particular, the heat transfer efficiency of the heating element is maximized, so that the size of the melting furnace is possible, and therefore, the withdrawal amount compared to the dissolving capacity doubled to an electric dissolving device that can greatly increase the amount of dissolution per unit time.

In general, the electrolytic apparatus for glass is a device for producing a glass powder in the form of particulates, and there is usually an indirect heating method using radiant heat or a direct heating method that directly energizes the inside of the melting tank using an electric heating element, which is a combination of materials It is optionally applied according to the properties to prepare a glass powder.

However, the indirect heating method and the direct heating method have a relatively low heat transfer efficiency for glass raw materials except for the surrounding area of the heating element, which is suitable for small-scale furnaces, but is not suitable for large-scale furnaces, as described below. Not only is it uneconomical, but there is also a problem with industrial mass production.

More specifically, the indirect heating method of the heating method indirectly heats the glass raw material by using the radiant heat of the electric heating element, when the furnace is large, the heating element is installed only in a specific position, the glass raw material at a distance from the heating element It is difficult to supply enough calories to heat, so the efficiency is not high even though it takes a lot of time and power to melt the glass raw materials, so that it is possible to improve the quantity of heating elements per unit area of the melting furnace. It must be installed, which is problematic from an economic point of view.

In addition, even if a large number of heating elements are installed, there must be an interval between installation of the heating elements, and therefore, the installation quantity of the heating elements is limited because installation is impossible due to limitations in the installation, and a sufficient quantity of heat can be supplied in a limited quantity. There is a problem of vicious cycles.

In addition, the direct heating method of the heating method is a method of heating the glass raw material by installing a heating element in the melting tank and the glass raw material directly in contact with the heating element, covering the top with a raw material so-called cold top (cold) -top) The raw material is melted in this way. The heating time is variable according to the thickness of the raw material covering the upper part, and the composition is localized because the degree of volatilization is different between the heating element and the heating element and the separation material due to the long heat treatment. There is a problem that is different.

In addition, the problem related to the installation quantity of the heating element exposes the same problem as in the indirect heating method.

On the other hand, in the case of dissolving the mother glass for powder glass using a large melting furnace, even if the heating element is installed in a limited amount, the melting capacity is low compared to the input amount of the raw material, so that the upper raw material layer becomes thick, and the melting capacity is lowered, and also by local heating. Along with the bridge (bridge) phenomenon there is a problem that lowers the quality of the product.

As described above, the electric dissolving apparatus using the electric heating element has its limitations, and the heating capacity of the heating element varies depending on the heating element material. In the case of increasing the size of the equipment, the heating capacity, that is, the melting point, to smoothly perform the melting process It is necessary to apply a high heating element, in this case, the cost of the heating element is very high, and thus there is a problem that the manufacturing cost of the glass finally increases.

On the other hand, the heating element is a problem of erosion and contamination by the volatilization of the glass raw material is easily raised, which has a problem of adversely affecting the composition of the glass raw material for the subsequent treatment, as well as reducing the lifetime and reliability of the heating element.

Therefore, in consideration of all factors such as the heat transfer aspect, the quantity of installation of the heating element, the interval of installation of the heating element, and the aspect related to the erosion of the heating element, it is obvious that the electrolytic apparatus has its limitations. It is disadvantageous in terms of economics and consumes a lot of power, so it is not suitable for mass production systems.

Therefore, the present invention has been made to solve the above problems, an object of the present invention is an electric melting furnace that combines indirect heating by the upper heating element of the furnace, and direct heating by the heating element inside the furnace, it is omnidirectional for glass raw materials It is possible to heat and use the transferred heat energy as a heating source to save energy and to minimize the problem of local composition change, and to obtain high melting quality of glass. In particular, the heat transfer efficiency of the heating element is maximized. It is possible to increase the size of the melting furnace, and therefore, to provide an electrolytic apparatus for glass that can increase the amount of dissolution per unit time by increasing the withdrawal amount relative to the dissolution capacity.

Another object of the present invention is to provide an electric melting apparatus for glass which can be individually dissolved for a specific glass composition by controlling indirect heating by radiant heat and heating elements capable of direct heating by electrode energization, respectively.

It is still another object of the present invention to provide an electrolytic apparatus for glass, in which a partition is provided between the first heating element and the melting tank to prevent erosion of the first heating element due to volatile components, and thus can be used for a long time.

Still another object of the present invention is a plurality of vents are formed in the partition wall, and formed to have a downward inclination structure in the direction of the first heating element in the melting tank, while blocking the inflow of volatiles, the radiant heat of the first heating element is melted through the vent It is to provide an electrolytic apparatus for glass to be delivered to the tank, to prevent a decrease in thermal efficiency.

The present invention for achieving the above object is a glass dissolving apparatus, comprising: a supply unit for providing a mixed inorganic glass raw material; And a melting furnace having at least one heating element provided therein so that the raw material provided from the supply portion is dissolved in the melting tank, wherein the heating element is provided in proximity to the melting tank to indirectly heat the glass raw material through radiant heat. Disclosed is an electric melting apparatus for glass, further comprising: a heating element; and a second heating element installed in the melting tank to directly heat the glass raw material.

The first heating element is a super cantal (MoSi2) heating element, and is preferably installed in the upper side space of the melting tank.

The second heating element is preferably an electrode of any one of molybdenum (Mo), tin oxide (SnO 2), and platinum (Pt).

The molten composition is molded into a shape of a glass ribbon, and a pair of rollers having a cooling unit therein;

Preferably, the melting furnace further includes a partition wall disposed between the melting tank and the first heating element to prevent damage of the first heating element due to the volatile component of the melting tank.

The partition wall further includes a plurality of vents such that radiant heat of the first heating element is transferred to the melting tank as a fireproof material, and the vent has a downwardly inclined structure toward the first heating element in the melting tank. .

The heating element further includes a control device for adjusting the calorific ratio of the first heating element and the second heating element according to the composition to be dissolved, wherein the control device adopts a constant current control method, and the electrode of the second heating element is It is preferable to conduct electricity directly in the melting tank to dissolve the composition.

According to the configuration of the present invention, the following effects can be expected.

The present invention is an electric melting furnace that combines indirect heating by the upper element of the melting furnace and direct heating by the heating element inside the furnace, it is possible to save energy, obtain a high melting quality of the glass, in particular, the heat transfer efficiency of the heating element is maximized It is possible to increase the size of the melting furnace, and therefore, the withdrawal amount can be doubled with respect to the dissolution capacity, thereby increasing the amount of dissolution per unit time.

The present invention has the effect that the indirect heating by the radiant heat, and the heating element capable of direct heating by energizing the electrode can be customized dissolution for a specific glass composition.

According to the present invention, a partition wall is provided between the first heating element and the melting tank to prevent erosion of the first heating element due to volatile components, and thus there is an economic effect that can be used for a long time.

In the present invention, a plurality of vents are formed in the partition wall, and are formed to have a downward inclination structure in the direction of the first heating element in the melting tank, so that radiant heat of the first heating element is transferred to the melting tank through the vent while blocking the inflow of volatile components. This has the effect of preventing a decrease in thermal efficiency.

1 is an overall view shown to explain a glass electrofusion apparatus according to an embodiment of the present invention,
2 is a cross-sectional view of a melting furnace shown to explain a heating element according to an embodiment of the present invention, and
3 is a cross-sectional view of a melting furnace shown to explain a partition wall according to an exemplary embodiment of the present invention.

Hereinafter, a preferred embodiment of the electrolytic apparatus for glass according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the present invention, the defined terms are defined in consideration of the functions of the present invention, and they can be changed according to the intention or custom of the technician working in the field, and the definition is based on the contents throughout this specification It should be reduced.

1 is an overall view shown to explain a glass electrofusion apparatus according to an embodiment of the present invention.

As shown in the drawing, the electric dissolving device is largely composed of a supply part 140 for providing a glass material, a melting furnace 100 for dissolving the supplied glass material, and a discharge part 120 for discharging the dissolved glass.

The supply unit 140 is composed of a transfer unit 143 for transferring the glass material of the hopper 141 of the reverse pyramid shape to the melting furnace 100 to facilitate the stable supply of raw materials, wherein the transfer unit 143 is a screw, inclined And it is configured to provide the glass powder supplied through the hopper 141, such as a hydraulic structure to the melting furnace 100, which is a conventional structure, detailed description thereof will be omitted.

The melting furnace 100 is composed of a melting tank 101 to receive the glass raw material provided from the supply unit 140, and a heating element 110 for directly or indirectly heating the glass raw material of the melting tank 101, where the melting The tank 101 is a housing for receiving the glass raw material provided from the supply unit, and may be a housing area of the melting furnace 100 as shown, or may be a separate housing.

The heating element 110 is provided with a custom voltage corresponding to the characteristics of the glass raw material, that is, the melting resistance of the glass raw material through the control device 160, as well as local heating and remote heating is easy. Therefore, it is possible to optimize the calorific value and to improve the dissolution quality as well as to increase the amount of dissolution per unit time.

Such a heating element 110 is installed in close proximity to the melting tank 101 and the first heating element 111 for indirectly heating the glass raw material of the melting tank 101 through radiant heat, and is installed inside the melting tank to provide the glass raw material. The second heating element 113 is directly heated, and a detailed description thereof will be described with reference to FIG. 2.

2 is a cross-sectional view of a melting furnace shown to explain a heating element according to an embodiment of the present invention.

As shown, Figure 2a is a cross-sectional view taken along the line A-A of Figure 1, Figure 2b is a view showing a cross-sectional state by the line B-B of Figure 2a, a detailed description will be described with reference to this.

The first heating element 111 is provided at regular intervals on both sides of the upper portion of the melting tank 101 to indirectly heat the glass raw material of the melting tank 101 through radiant heat.

The first heating element 111 is preferably provided in plurality in the longitudinal direction of the melting tank 101, that is, along the progress direction of the process at regular intervals.

In addition, it is preferable that the first heating element 111 is additionally installed in the region of the discharging portion 120 to prevent the melted material from being hardened until discharge, as well as the region adjacent to the melting tank 101.

On the other hand, it is preferable that the first heating element 111 is an ultra high temperature heating element (MoSi2), which can be used at a high temperature (usable up to 1800 ° C) under an oxidizing atmosphere, and furthermore, the thin SiO2 glass film formed on the surface of the heating element has a high temperature. Prevents oxidation from

The shape of the first heating element is preferably at least one of various shapes such as poles, bars, U, W, and right angles.

The second heating element 113 is an electrode installed in the melting tank 101, and is used to directly melt the glass raw material contained in the melting tank 101 to dissolve. In particular, the control device of the constant current type shown in FIG. Through (160) it is possible to optimize the calorific value by providing a suitable current corresponding to the melting resistance of the glass raw material can not only improve the quality of melting, but also increase the amount of melting per unit time.

As shown in FIG. 2, the second heating element 113 is installed in the melting tank 101 from the outside of the melting furnace 100, and is preferably at least two.

In addition, the second heating element 113 is preferably an electrode of any one of molybdenum (Mo), tin oxide (SnO 2), and platinum (Pt), and most preferably, molybdenum.

As such, the melt melted through the heating element 110 is then shaped into a glass ribbon through the discharge part 120, which will be described with reference to FIG. 1.

The melt is melted through the molten bath 101 as shown in the melt is moved vertically downward under the load flows into the outlet 120 through the throat 121, and then discharged to the outside through the outlet 123 At the same time, a pair of rollers 130 are molded into a glass ribbon shape.

The molding is then processed into coarse and finely ground glass powder having a predetermined particle size.

At this time, the cooling unit 131 is further provided inside the roller 130, which is intended to facilitate molding of the hot melt into the glass ribbon.

Meanwhile, the partition wall 150 may be further installed as shown in FIG. 3 to prevent the first heating element 111 from being damaged by volatiles in the process of dissolving the glass powder, which will be described with reference to FIG. 3. do.

3 is a cross-sectional view of a melting furnace shown to explain a partition wall according to an exemplary embodiment of the present invention.

As shown, Figure 3a is a cross-sectional view taken along the line A-A of Figure 1, Figure 3b is a view showing a cross-sectional state by the line C-C of Figure 3a, showing a state further including a partition wall (150).

As illustrated, the partition wall 150 is further provided to prevent the at least one adjacent first heating element 111 from being damaged by the volatile component generated from the dissolved glass powder.

The partition wall 150 is provided between the melting tank 101 and the first heating element 111 to prevent the first heating element 111 from being eroded by volatile components.

That is, the partition wall 150 is to prevent the volatiles generated from the molten bath 101 from being in contact with the first heating element 111 to prevent dropping due to the damage of the first heating element 111 as well as to prevent malfunction. .

In addition, the partition wall 150 is a refractory material, but blocks the contact of volatile components, a plurality of vents 151 are further formed so that the radiant heat of the first heating element 111 is transferred to the melting tank 101, such vents 151 ) Is preferably inclined downward from the melting tank 101 toward the first heating element 111.

That is, the vent is to prevent the inflow of the volatile components having a predetermined inclination, to prevent the inflow of the volatile components and to transmit radiant heat of the first heating element to the melting tank, thereby preventing the thermal efficiency from being lowered.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

100: melting furnace 101: melting tank
110: heating element 111: first heating element
113: second heating element 120: discharge part
121: Throat 123: Outlet
130: roller 131: cooling unit
140: supply unit 141: hopper
143: transfer unit 150: partition wall
151: vent 160: control device

Claims (7)

In the glass melting apparatus,
Supply unit 140 for providing a mixed inorganic glass raw material; And
And a melting furnace (100) provided with at least one heating element (110) therein so that the raw material provided from the supply unit (140) is dissolved in the melting tank (101).
The heating element 110 is provided in close proximity to the melting tank 101, the first heating element 111 for indirectly heating the glass raw material by radiant heat; and installed in the melting tank 101 to the glass raw material The second heating element (113) for heating directly; the electric melting device of the glass, characterized in that it further comprises. The method of claim 1,
The first heating element 111,
Supercantal (MoSi2) heating element, the electric melting apparatus of the glass, characterized in that installed in the upper side space of the melting tank. The method of claim 1,
The second heating element 113,
Electrolyte device of the glass, characterized in that the electrode of any one of the physical properties of molybdenum (Mo), tin oxide (SnO2) and platinum (Pt). The method of claim 1,
The molten composition is molded into the shape of a glass ribbon (glass ribbon), a pair of rollers 130 provided with a cooling unit 131 therein; electrolytic apparatus of the glass, characterized in that it further comprises. The method of claim 1,
The melting furnace 100,
A partition wall 150 installed between the melting tank 101 and the first heating element 111 to prevent damage of the first heating element 111 due to volatile components of the melting tank 101. Electrolytic apparatus of the glass, characterized in that configured by. The method of claim 5,
The partition wall 150,
As the refractory material, a plurality of vents 151 so that the radiant heat of the first heating element 111 is transmitted to the melting tank 101,
The vent 151 has an inclination structure downward in the melting tank 101 toward the first heating element 111, characterized in that the electrolytic apparatus of the glass. 7. The method according to any one of claims 1 to 6,
The heating element 110,
And a control device 160 for adjusting the calorific ratio of the first heating element 111 and the second heating element 113 according to the composition to be dissolved.
The control device 160,
A constant current control method is employed, and the electrode of the second heating element 113 is electrically dissolved in the melting tank 101, the electric melting apparatus characterized in that the composition is dissolved.

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