KR200426624Y1 - Electric furnace for melting and heat insulation of aluminium - Google Patents

Abstract

The present invention relates to a crucible-mounted aluminum melting and heating furnace using electricity as a heat source.

The conventional electric melting furnace is performed by hand by skilled workers from iron casing welding work to the shaft wall work of the fireproof layer, and the time and cost burden due to the replacement of the fireproof layer according to the endurance life (about 5 years) increases. do.

In addition, regarding the embedding of the fins for mounting the electric heater, as a result of the drilling and drilling of the fins, the heat loss through cracking of the insulation layer is caused, the insulation layer is physically weakened, and the bearing capacity of the pin is sustained by continuous thermal shock or wear. In this case, there is a problem in that the stability of the electric heater cannot be guaranteed.

In particular, with regard to heat loss, there is a limit to heat insulation because in addition to the heat loss caused by the fins, since the refractory layer is bonded by mortar when forming the fireproof layer.

Therefore, the present invention aims to provide an electric furnace and a method of manufacturing the same that can significantly improve durability and thermal efficiency while improving the structure and manufacturing method, simplifying the manufacturing process and lowering manufacturing and management costs.

Aluminum melting furnace, electric furnace

Description

Electric furnace for melting and heat insulation of aluminum

1 is an external perspective view of an electric furnace according to the present invention;

2 is a vertical sectional view of an electric furnace according to the present invention;

<Description of the major reference numerals>

10: iron casing 20: fireproof layer

21: electric heater 22: fin

23: forming layer 24: ceramic bulk layer

25: ceramic wool layer 26: radiation shielding layer

27: outer insulation layer 28: molten metal discharge path

The present invention relates to a crucible-mounted aluminum melting furnace using electricity as a heat source, and more particularly, to a low-cost and high-efficiency electric melting furnace having improved heat insulation structure of a fin and a melting furnace equipped with an electric heater.

Conventional crucible-mounted electric furnaces generally consist of an iron casing, a fireproof layer and an electric heater.

The fireproof layer is formed in the order of a heat insulating material (for example, silica board, ceramic wool) of a two-layer structure and a fireproof insulating brick of a two-layer structure from the outside, and drills a hole in the innermost two-layer fireproof insulating brick layer. After drilling, bury the pin. The fin has a structure in which an electric heater is mounted to heat the crucible.

The iron casing is a cylindrical or polygonal column shape, the steel plate is rolled into a cylindrical or welded seams of several sides to suit the melting furnace and the upper and lower parts are completed by welding the iron plate cut in the shape with the body portion.

Electric melting furnaces such as welding work from the iron casing to the fire wall of the shaft layer work by skilled workers one by one to increase the time and cost burden. Moreover, when the endurance life (approximately 5 years) is reached, the replacement of the refractory layer is required. For this purpose, the replacement work performed by moving the furnace is a very heavy burden.

In addition, regarding the embedding of the fins for mounting the electric heater, as a result of the drilling and drilling of the fins, the heat loss through cracking of the insulation layer is caused, the insulation layer is physically weakened, and the bearing capacity of the pin is sustained by continuous thermal shock or wear. In this case, there is a problem in that the stability of the electric heater cannot be guaranteed.

In particular, in terms of heat loss, minimizing heat loss is an important factor directly affecting product performance due to the characteristics of an electric furnace, which is an indirect heating method by an electric heater. When forming, there was a limit to heat insulation because it was bonded with mortar between the refractory. In general, the surface temperature of the furnace is about 65 degrees, the heat loss is large.

The present invention is to solve the above-mentioned problems of the prior art, by improving the structure and manufacturing method of the aluminum melting and thermal insulation furnace, to simplify the manufacturing process and lower the manufacturing and maintenance costs, while significantly improving the durability and thermal efficiency It is intended to provide an electric furnace and a method of manufacturing the same.

In order to solve the technical problem of the present invention, the present invention is a crucible-mounted aluminum melting and insulating electric furnace comprising an iron casing, a fireproof layer, an electric heater and a fin structure for mounting the electric heater, the innermost of the fireproof layer is molded Provided with a layer, the forming layer provides an electric furnace and a method for manufacturing the same, characterized in that the mold is provided by the inside of the furnace and the pin is mounted in a state in which the refractory refractory is poured into the mold.

According to another feature of the present invention, in order to further enhance the thermal insulation effect, the fire resistant layer further includes an air layer, a radiation shielding layer and an outer heat insulating layer in addition to the molding layer.

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

Iron casing

1 is a perspective view of an embodiment of an electric melting furnace according to the present invention shows the appearance of the iron casing (10).

The iron casing 10 is for protecting the appearance of the electric furnace in which the fireproof layer is formed, and has shown a polygonal pillar shape. The fabrication method is performed by cutting and bending the laser model on the top, bottom and side, respectively, and then completing bolt assembly and internal welding in the order of bottom, side, and top.

The method of manufacturing the iron casing can provide an appearance having the level of perfection of the level of home appliances because the welding part is not exposed to the outside by welding from the inside, and accurate assembly without error due to laser model cutting is possible. Therefore, the waste of materials can be reduced, the assembly work is convenient, and the work speed is improved by more than two times, which also causes the effect of shortening the air.

Fireproof layer

The fireproof layer is to prevent the heat for heating the crucible to be mounted out of the outside to be described with reference to FIG.

The fireproof layer 20 is an electric heater 21 mounted on the fin 22 from the inside, a fin 22 coupled to the shaping layer for mounting the electric heater, and an irregular refractory in the mold mounted state. It is formed of the poured molding layer 23, the ceramic bulk layer 24 including the air layer, the ceramic wool layer 25, the radiant heat shielding layer 26 and the outer heat insulating layer 27. In addition, the melt discharge path 28 penetrates through the fire-resistant layer.

The electric heater 21 is located on the innermost side of the fireproof layer to heat the crucible to be mounted. The electric heater is not an essential component of the electric furnace or a feature of the present invention, and according to the related art, a detailed description thereof will be omitted.

The fin 22 is a structure in which the electric heater 21 is mounted, but the conventional technology is a form in which only one end of the electric heater is bent, such as "L", whereas the fin according to the present invention is shaped like a "Z" shape. Both ends are bent to strengthen the bearing capacity of the pin.

The shaping layer 23 is formed by mixing an amorphous refractory material (e.g. ceramol) with water, pouring it into a mold installed in an electric furnace, and curing. When the pins 22 are attached together and molded together, the forming layer and the pins are integrally manufactured. Thus, since the pins do not need to be drilled and embedded, the work process is simplified, and the heat insulating property and the supporting force of the pins are greatly improved.

The ceramic bulk layer 24 performs secondary heat insulation on the heat passing through the shaping layer, which is the primary heat insulation layer. Since the ceramic bulk layer 24 is a bulk form in which air is contained between the ceramic wool, the heat insulation and thermal insulation are increased.

Ceramic wool layer 25 Unlike the ceramic bulk layer, it is formed of only ceramic wool to perform fire and heat insulation functions.

Radiation heat shield layer 26 is to increase the insulation effect by blocking the radiant heat, providing a material that can block the transfer of radiant heat, such as aluminum plate (AL-PLATE) (26b), this mineral wool layer (26a, 26c) Between them.

 The outer heat insulation layer 27 is formed at the outermost side of the melting furnace as a heat insulating material having excellent fire resistance and low thermal conductivity, such as rock wool, serves to finally block the heat to exit the melting furnace.

As described above, the fireproof layer according to the present invention is characterized by a molded layer as a first feature, and other components are adopted to maximize the thermal insulation effect, and the stacking order may be changed.

The melt discharge path 28 is an emergency discharge port penetrating the fireproof layer in case of leakage of the melt due to the crucible breakdown, and uses a special fireproof material that prevents the infiltration of aluminum and withstands high heat, and slopes downward for rapid discharge. To achieve. In addition, a sensor (not shown) is attached to the molten metal discharge path to detect whether the molten metal is discharged. When the sensor detects the leakage of the molten metal, the power of the electric heater can be shut off and an alarm can be made. This prevents a short circuit of the electric heater or a fire caused by the molten metal when the molten metal leaks.

When the refractory layer was formed as in the above-described embodiment, it was found that the melting furnace outer surface temperature was significantly lowered to 25 degrees. According to the results of self-testing, the time required for the dissolution process was increased when the 500 Kg of aluminum was dissolved. It was confirmed that the throughput was reduced from 20 minutes to 1 hour 20 minutes by more than 2 times.

The present invention is characterized by providing a technical idea such as the formation of the iron casing and the forming layer to significantly improve the performance of the electric furnace for melting and insulating the conventional aluminum. Therefore, if the level of technology that can be easily changed by those skilled in the art other than the features of the present invention is combined with the present invention will be said to belong to the technical scope of the present invention.

According to the present invention, the iron casing by cutting and bending the laser model can shorten the air and reduce the cost, and improve the aesthetics of the appearance. In particular, the molding layer can be molded integrally with the pin in the state where the pin is mounted, thereby simplifying the manufacturing process, significantly reducing the cost, and greatly improving the durability of the product.

Regarding the shape of the fin, by proposing a shape in which both ends are bent, the bearing capacity of the fin is improved to enable stable operation of the electric heater.

In addition, it is very convenient to replace the refractory at the place where the melting furnace is located or to perform the molding of the molding layer when replacing the fireproof layer due to the endurance of endurance life. In the manufacture of the advantage that does not affect the skill of the operator.

Claims (8)

In a crucible-mounted aluminum melting and insulating electric furnace comprising an iron casing, a fireproof layer, an electric heater and a fin structure for mounting an electric heater, a forming layer is provided on the innermost side of the fireproof layer, and the forming layer is formed inside the furnace. And an amorphous refractory body poured into a mold in the state where pins are mounted and cured. The aluminum melting and heat insulating furnace of claim 1, wherein the fireproof layer further comprises a ceramic bulk layer, a ceramic wool layer, a radiation shielding layer, and an outer heat insulating layer in addition to the molding layer. The aluminum casing of claim 1, wherein the iron casing is cut and bent on the upper, lower, and side surfaces, respectively, and then completed by bolt assembly and internal welding in the order of the lower, side, and upper parts. Melting and warming furnace. The aluminum melting and heat insulating furnace according to claim 1, wherein the pins integrally mounted at the time of forming the shaping layer are fixed by being buried in an amorphous refractory and cured together as a "Z" shape having both ends bent. The aluminum melting and warming furnace of claim 2, wherein the ceramic bulk layer is in a bulk form in which air is contained between ceramic wool. According to claim 2, The radiant heat shield layer is aluminum melting and heat insulating furnace, characterized in that the aluminum plate (AL-PLATE) is located between the mineral wool layer. 3. The aluminum melting and warming furnace according to claim 2, wherein the outer heat insulating layer is rock wool. According to claim 1 or 2, further comprising a molten metal discharge path passing through the fire-resistant layer, to prevent the penetration of aluminum to use a special refractory material that can withstand high heat, and to make a downward slope to the outside for rapid discharge And, aluminum melting and insulating electric furnace, characterized in that equipped with a sensor for detecting the discharge.

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