KR20170057157A - Melting furnace - Google Patents

Abstract

The present invention relates to a melting furnace. According to an aspect of the present invention, the melting furnace comprises: a housing having a bottom opened; a heating unit installed in the housing; and a molten bath disposed under the housing, having an inner surface abutting raw materials formed of a material of an iron alloy, and provided with a case having a flow path therein through which a refrigerant flows. Heat generated in the heating unit is applied to the molten bath to melt a raw material in the molten bath, and the raw material in the molten bath is able to provide a melting furnace divided into a raw material layer, a molten metal layer, and a crystalline layer by influence of a refrigerant upon melting. The present invention intends to provide a melting furnace which is low in production cost and maintenance cost.

Description

Melting furnace {MELTING FURNACE}

The present invention relates to a melting furnace.

A melting furnace is a device that includes a melting tank and a heating source, and places the raw material in a melting tank and heats and melts and melts the raw material.

The melting furnace can melt and melt various materials, and can be used, for example, to melt glass. Recently, according to the development of the information communication industry, high-quality glass such as a substrate glass for TFT LCD (THIN FILM TRANSISTOR-LIQUID CRYSTAL DISPLAY) and a PDP (PLASMA DISPLAY PANEL) substrate glass is required to be produced. The role of the melting vessel became very important.

Concretely, since the substrate glass must satisfy the conditions such as low density, heat resistance, durability, chemical resistance and mechanical characteristics, a high melting temperature and a high production technique are required.

In order to melt such a high-quality glass, foreign substances caused by erosion of the refractory during melting of the glass should not be mixed, and various melting conditions such as a sufficient holding time at a high temperature should be involved.

For this reason, conventional melting furnaces have a limitation in mass production of high quality glass products as follows.

First, melting furnace using furnace refractories as a melting furnace has the advantage of mass production, but temperature control is difficult due to the use of heat source as gas, and the equipment size is large, which requires an excessive installation site. In addition, frequent maintenance work is required due to reaction and erosion of the volatile gas generated during melting the raw material and the glass raw material.

In order to solve these problems, a melting furnace system using a platinum crucible developed by Matsushita Electric Industrial Co., Ltd. in Japan was proposed in the beginning of 2000. Such a melting furnace using a platinum crucible has been widely used not only in domestic but also in the world, It is applied to industrial field.

Although the melting furnace using platinum crucibles has the advantage of producing high quality glass materials, there is a disadvantage in that the initial investment cost of the device is extremely high because the price of the platinum crucible is high, and the maintenance cost RUNNING COST) is unreasonably high compared to production costs.

In addition, since the platinum crucible has a structural problem that is possible only at the upper part of the raw material supply, when the raw material is supplied into the platinum crucible, high temperature heat in the platinum crucible reacts with the raw material, .

Patent Document 1: Japanese Patent No. 4105541 (Apr. 04, 2008) Patent Document 2: Japanese Patent No. 4360158 (Aug. 21, 2009)

The present invention has been proposed in order to solve the above problems, and it is an object of the present invention to provide a melting furnace capable of melting a material with high quality without using platinum.

Further, it is an object of the present invention to provide a melting furnace capable of supplying a raw material to a molten bath without clogging the raw material inlet.

In addition, there is a need to provide a melting furnace which is low in production cost and low in maintenance cost.

According to an aspect of the present invention, there is provided a portable terminal comprising: a housing having a lower side opened; A heating unit installed in the housing; And a case having a case which is disposed on the lower side of the housing and at least an inner side where the raw material abuts is formed of a material of an iron alloy and has a flow path through which refrigerant can flow, The molten bath may be divided into a raw material layer, a molten metal layer and a crystalline layer depending on the influence of the refrigerant upon melting the raw material in the molten bath.

And a refractory disposed between the lower side of the housing and the molten bath, the refractory having a central hole for communicating the housing and the molten bath at the center, the housing having an upper surface formed in an arcuate shape, Thereby providing a melting furnace to be formed.

In addition, the communication hole may provide a melting furnace formed at a position corresponding to the center hole.

The heating unit may be fixed to an upper surface of the housing to provide a melting furnace vertically disposed to be spaced above the upper surface of the refractory.

In addition, the heating unit may provide a melting furnace in which at least two or more heating elements are disposed in two or more rows.

Further, the refractory may provide a melting furnace in which a portion of the upper opening of the molten bath is shielded, and the center hole is located on the upper opening.

Also, the melting vessel may be provided with at least one inlet for introducing the refrigerant into the flow path, and at least one outlet for discharging the refrigerant of the flow path to the outside.

The first diaphragm has one end disposed in the outer wall of the melting vessel and the other end spaced apart from the inner wall of the molten bath. The other end of the diaphragm is disposed in the inner wall of the molten bath and the other end is spaced apart from the outer wall of the molten bath The first diaphragm and the second diaphragm are sequentially disposed on the first diaphragm.

Further, it is possible to provide a melting furnace, which further comprises a raw material supply unit disposed on a side surface of the housing to transfer the raw material to the molten bath.

The melting furnace can also provide a melting furnace comprising an iron alloy consisting of 23% of chromium (Cr), 5% of aluminum (Al), 3% of molybdenum (Mo) and 69% of iron (Fe)

Further, the melting vessel may provide a melting furnace having a discharge port for discharging the molten raw material.

Further, it is possible to provide a melting furnace further including a heating body disposed on one side of the discharge port.

Further, it is possible to provide a melting furnace further including a temperature sensing sensor disposed in the housing or the molten bath.

The melting furnace according to the embodiment of the present invention has an advantage that the material can be melted with high quality without using platinum.

Further, there is an effect that the raw material can be supplied to the melting vessel without a problem that the raw material inlet is clogged.

In addition, there is an advantage that the production cost is low and the maintenance cost is low.

1 is a front view showing the construction of a melting furnace according to an embodiment of the present invention.
FIG. 2 is a schematic view showing a structure of a housing, a refractory, and a melting vessel according to an embodiment of the present invention.
3 is a schematic view showing a state where a material is melted inside a melting vessel and a melting vessel according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Unless defined otherwise, all terms used herein are the same as the generic meanings of the terms understood by those of ordinary skill in the art, and where the terms used herein contradict the general meaning of the term, they shall be as defined herein.

It is to be understood, however, that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

FIG. 1 is a front view showing the structure of a melting furnace according to an embodiment of the present invention, FIG. 2 is a view schematically showing a structure of a housing, a refractory and a melting vessel according to an embodiment of the present invention, And the material is melted inside the melting vessel and the melting vessel.

1 to 3, a melting furnace 100 according to an embodiment of the present invention includes a frame 170 that forms an overall structure, a housing 110 that is installed in a frame 170 and includes a heating unit 120, A molten bath 140 disposed below the housing 110, and a raw material supply unit 150 for supplying the raw material to the molten bath 140.

The housing 110 is provided with a heating unit 120 to provide a heating space. Heat generated in the heating unit 120 is transferred to the melting vessel 140 to melt the raw material of the melting vessel 140.

The raw material supply part 150 may be installed on one side of the housing 110 rather than on the upper side of the housing 110. The raw material discharge port through which the raw material is discharged is positioned higher than the molten bath 140, The raw material can be fed to the feeder 140.

Specifically, the raw material supply unit 150 includes a hopper 151 into which the raw material is input, a feed screw 152 that communicates with the hopper 151 to feed the raw material discharged from the hopper 151 into the molten bath 140, And a driving unit 153 for driving the conveying screw 152. The raw material advancing by the conveying screw 152 may fall into the melting vessel 140 by a predetermined distance.

In the present embodiment, the raw material is exemplified as glass, but the idea of the present invention is not limited to this, and it may be any raw material requiring melting and melting such as bauxite extract and metal powder such as iron sludge which can be recycled .

The housing 110 may be formed with a lower opening and may further include a refractory board 112, a brick 113 or a metal 114 on the outside thereof. The housing 110 may be formed of a combination of materials.

Here, a part of the lower opening of the housing 110 can be shielded by the refractory 130, and the refractory 130 can function as the bottom surface of the housing 110. [ The refractory 130 is disposed between the housing 110 and the molten bath 140 so that the molten gas formed in the molten bath 140 flows only through the center hole 131 formed in the substantially central portion of the refractory 130 110 can be introduced into the inside.

The housing 110 has an upper surface 111 formed in an arcuate shape and a communicating hole 115 communicating with the outside may be formed and the communicating hole 115 is formed at a position corresponding to the center hole 131 .

The heat generating unit 120 is disposed in the housing 110. Specifically, the heat generating unit 120 may include at least two heat generating elements arranged in two or more rows. This structure maximizes the amount of heat generated in the melting furnace 100, ), The effective melting and melting of the raw material can be achieved. In this embodiment, two heat generating elements are arranged symmetrically on both sides of the communication hole 115 as an example.

Here, the heat generating unit 120 may be embodied as a heating element of an electric resistance heating type, and the heating element may be realized as a molybdenum (MoSi2) heating element, for example.

In the case of the heating element of the electric resistance heating type, the embodiment can achieve an environmentally friendly on-site atmosphere due to the reduction of the energy cost and the occurrence of no pollution gas compared with the gas combustion type, and the heating temperature can be controlled accurately, Material quality can be guaranteed.

The heating unit 120 may be vertically disposed on the upper side 111 of the housing 110 so as to be spaced apart from the upper side of the refractory 130. In this case, the structure of the arched housing 110 The contact of the volatile gas with the heating element is minimized, and the service life of the heating element can be substantially prolonged. Specifically, the volatile gas generated in the melting vessel 140 enters the inner space of the housing 110 only through the center hole 131 of the refractory 130, and the volatile gas is supplied to the arcuate upper surface of the housing 110 111) structure and the communication hole 115 disposed above the center hole 131. Therefore, when the heating element is arranged vertically, the movement of the volatile gas is minimized and the contact time is minimized Can be minimized.

The refractory 130 may be disposed between the melting vessel 140 and the housing 110. The refractory 130 may be disposed on the lower side of the housing 110. [

The refractory 130 may be disposed between the lower side of the housing 110 and the melting vessel 140 and may include a center hole 131 at the center for communicating the housing 110 with the melting vessel 140.

The refractory 130 may be formed as the electromotive refractory 130 and the center hole 131 may be formed in a rectangular, square, or circular shape as long as the open upper side of the melting vessel 140 can communicate with the housing 110. [ There is no form of back.

The refractory 130 is configured to cover a part of the upper opening of the molten bath 140 while the center hole 131 is positioned on the upper opening of the molten bath 140. This structure allows the volatile gas generated in the molten bath 140 to effectively flow into the communication hole 115 formed in the upper surface 111 of the arcuate shape of the housing 110 without being stagnated inside the melting furnace 100, So that corrosion of the heat generating portion 120 can be prevented. Particularly, when the communication hole 115 is located in the upper right chamber of the center hole 131, the volatile gas generated in the melting vessel 140 is guided to pass through the center hole 131, ), It is possible to maximize the above effect.

In the melting vessel 140 according to the embodiment of the present invention, the inlet 141 is formed at one side and the outlet 142 is formed at the other side. The inside of the melting vessel 140 is connected to the inlet 141 and the outlet 142, A flow path 143 may be formed.

The refrigerant may be a gas such as air or a liquid such as water and is provided for cooling the melting vessel 140. The temperature of the melting vessel 140 may be lowered so that the raw material melted in the melting vessel 140 And divided into roughly three layers of the raw material layer (a), the crystalline layer (b) and the molten metal (molten) layer (c).

The melting vessel 140 may be formed in a double wall structure having an inner wall and an outer wall to form a flow path 143 therein.

3, the inlet 141 and the outlet 142 of the melting vessel 140 are formed at substantially the same height on both sides of the melting vessel 140. However, the number and position of the inlet 141 and the outlet 142 are not limited thereto, Multiple numbers may be provided as needed. In addition, an inlet 141 and an outlet 142 of each air or fluid may be separately formed.

Hereinafter, an example will be described in which liquid such as tap water is supplied as a refrigerant to the inlet 141. At this time, the temperature of the refrigerant flowing into the flow path 143 may be about 15 ° C to 35 ° C, the temperature of the refrigerant discharged may be about 40 ° C to 45 ° C, the pressure of the refrigerant introduced may be 1kg / cm 2 To 5 kg / cm < 2 >.

As described above, the melting vessel 140 of the embodiment including the cooling structure can prevent the melting vessel 140 from being deformed even at a high temperature (about 1700 DEG C or more), so that the durability can be improved. Specifically, the raw material is melted by the heat applied by the heat generating unit 120, whereby the melting tank 140 itself can be heated. In this case, problems such as melting of the material forming the melting vessel 140 or damage due to heat may occur. However, by flowing the coolant into the case of the melting vessel 140, The effect of cooling can be obtained, and the melting vessel 140 can be protected.

Further, the material in the molten bath 140 can be divided into the raw material layer (a), the crystal layer (b), and the molten layer (c) by cooling the molten bath (140). Specifically, the lower portion of the melting vessel 140, that is, the portion in contact with the inner wall of the melting vessel 140 receives less heat and directly receives the cooling effect of the melting vessel 140, (A) as the raw material. The uppermost part of the melting vessel 140 is the part facing the housing 110 closest to the housing 110, and is the part that receives the most heat, so that the raw material melts to form the molten layer c. Finally, the middle portion between the raw material layer (a) and the molten metal layer (c) receives hot heat in the molten metal layer (c) and receives cold cool air in the raw material layer (a) (B) which is not a hardened layer.

In this case, the raw material layer (a) and the crystalline layer (b) inside the melting vessel 140 serve as refractory materials, which eventually prevents deformation of the melting vessel 140 and prevents foreign matter from entering, The durability of the bath 140 can be enhanced and the quality of the bath 140 can be improved.

In order to more effectively improve the cooling structure as described above, in the embodiment, one end of the flow path 143 is disposed on the outer wall of the melting vessel 140 and the other end is spaced apart from the inner wall of the melting vessel 140 A first diaphragm 143a and a second diaphragm 143b having one end disposed on the inner wall of the molten bath 140 and the other end spaced apart from the outer wall of the molten bath 140, And the second diaphragm 143b may be sequentially arranged.

The interval d between the first diaphragm 143a and the second diaphragm 143b can be set at intervals of 50 mm so that the refrigerant is not stagnated in the flow path 143.

Such a diaphragm structure widens the contact surface of the fluid flowing in the interior, so that effective cooling can be achieved.

For example, the inner surface of the melting vessel 140 may be formed of an iron alloy, and the inner surface of the melting vessel 140 may be formed of an iron alloy. Examples of the iron alloy include Cr 23, Al 5%, Molybdenum 3% 69%. ≪ / RTI > In this embodiment, the case in which the melting vessel 140 is formed and the case having the flow path 143 inside is formed of an iron alloy will be described as an example. Specifically, " Kanthal APMT " may be used as the material of the melting vessel 140. In this case, as the raw material reacts at a high temperature, the aluminum having the lightest specific gravity reaches the surface layer of the structure and reacts with oxygen to form an aluminum oxide (Al2O3) coating layer on the surface of the molten bath 140, Such a coating layer can improve the durability of the melting vessel 140 because the mechanical characteristics and the structure are not changed even at a high temperature.

In the melting vessel 140, a discharge port 144 for discharging the molten raw material may be formed on one side. In this case, the embodiment can further include a heating body (not shown) disposed at one side of the discharge port 144, and therefore, even in the case of a viscous molten material (for example, Al2O3, SiO2) So that the production amount can be increased.

At least one temperature sensor 160 may be disposed in the upper housing 110 or the melting vessel 140 to sense the temperature inside the melting furnace 100.

On the other hand, the melting vessel 140 can be provided interchangeably. To this end, the molten bath 140 may be provided so as to be movable in the vertical direction of the frame 170, and an auxiliary molten bath 180 for replacement may be disposed on one side of the frame 170. For example, the support plate for molten bath replacement 171 provided in the frame 170 is provided so as to be movable in the vertical direction along the guide bar 172, and the support plate 171 is provided in the molten bath 140 and / Can be used for the movement of the auxiliary molten bath (180). The movement of the support plate 171 can be performed by a known driving force providing means such as a winch, a motor, or the like.

Specifically, when the melting of any one of the raw materials is completed, the operator moves the supporting plate 171 to support the melting vessel 140, separates the melting vessel 140 from the housing 110, The molten bath 140 can be moved to a predetermined waiting or replacement position. After the auxiliary molten bath 180 is placed on the support plate 171, the auxiliary molten bath 180 is raised and fixed to the housing 110 to melt the new raw material. With this method, the user can melt various raw materials more quickly.

The melting furnace 100 according to the embodiment of the present invention has an advantage that the material can be melted with high quality without using platinum. Specifically, the material can be melted with high quality as compared with the conventional technique in which the melting bath is formed of refractory material by manufacturing the melting bath 140 using an iron alloy material other than platinum.

In addition, since the raw material discharging portion of the raw material supplying portion 150 is disposed above the melting vessel 140 and the raw material supplying portion 150 is provided on one side wall of the housing 110, the raw material can be supplied to the melting vessel without clogging the inlet .

Further, since the melting vessel 140 is made of an iron alloy relatively inexpensive as compared with platinum, the production cost is low, and the durability is improved by cooling the melting vessel 140, There are advantages.

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, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Skilled artisans may implement the pattern of features that have not been explicitly described in combination, substitution of the disclosed embodiments, but which, too, do not depart from the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

100: melting furnace 110: housing
111: arcuate top side 112: refractory board
113: brick 114: metal
115: communication hole 120:
130: refractory 131: center hole
140: Melting bath 141: Inlet
142: outlet 143:
143a: first diaphragm 143b: second diaphragm
144: Discharge port 150:
151: Hopper 152: Feed screw
153: Driving unit 160: Temperature sensor
170: frame 180: auxiliary melting furnace

Claims (13)

A housing having a lower opening;
A heating unit installed in the housing; And
And a case having a case which is disposed on the lower side of the housing and at least an inner side where the raw materials abut against each other is made of an iron alloy material and in which a refrigerant can flow,
The heat generated in the heating unit is applied to the melting vessel to melt the raw materials in the melting vessel,
Wherein the raw material in the molten bath is divided into a raw material layer, a molten metal layer and a crystalline layer by the influence of a refrigerant upon melting. The method according to claim 1,
And a refractory disposed between the lower side of the housing and the molten bath, the refractory having a central hole at the center for communicating the molten bath with the housing,
Wherein the housing has an upper surface formed in an arcuate shape, and a communication hole communicating with the outside is formed. 3. The method of claim 2,
Wherein the communication hole is formed at a position corresponding to the center hole. 3. The method of claim 2,
Wherein the heating portion is vertically disposed to be spaced above the upper surface of the refractory by being fixed to the upper surface of the housing. The method according to claim 1,
Wherein at least two or more heating elements are arranged in two or more rows in the heating portion. 3. The method of claim 2,
Wherein said refractory shields a portion of an upper opening of said molten bath, said central hole being located on said upper opening. The method according to claim 1,
Wherein at least one inlet for introducing the refrigerant into the flow path and at least one outlet for discharging the refrigerant of the flow path to the outside are formed in the melting vessel. The method according to claim 1,
A first diaphragm having one end disposed on the outer wall of the molten bath and the other end spaced apart from the inner wall of the molten bath, and a second diaphragm having one end disposed on the inner wall of the molten bath and the other end spaced apart from the outer wall of the molten bath And a second diaphragm,
Wherein the first diaphragm and the second diaphragm are sequentially arranged. The method according to claim 1,
And a raw material supply unit disposed on a side surface of the housing for transferring the raw material to the molten bath. The method according to claim 1,
The melting furnace comprises an iron alloy comprising 23% of chromium (Cr), 5% of aluminum (Al), 3% of molybdenum (Mo) and 69% of iron (Fe) 11. The method according to any one of claims 1 to 10,
And the melting vessel has a discharge port for discharging the molten raw material. 12. The method of claim 11,
And a heater disposed on one side of the discharge port. The method according to claim 1,
And a temperature sensing sensor disposed in the housing or the fusing tank.

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