KR200303246Y1 - electric furnace for china and porcelain - Google Patents

Abstract

The present invention relates to an electric kiln for ceramics of a new structure, which can reduce the burning or discoloration of the glaze layer of the reduced ceramics.

According to the present invention, the heating chamber 12 is provided inside and the circumferential wall is a kiln main body 10 having a plurality of ventilation windows 14, the electric heater 2 provided in the heating chamber 12, The circulation fan 20 which is provided in the heating chamber 12 and purifies the hot air heated by the electric heater 2, and the reducing agent supply pipe 40 which supplies a reducing agent into the heating chamber 12 are provided. In the electric oven for ceramics included, one side of the heating chamber 12, the air supply pipe 60 is installed in communication with the outside and the air supply pipe 60 is provided with a blowing fan 70, the heating chamber 12 There is provided an electric kiln for ceramics, characterized in that the supply of cold air to the outside to cool the temperature inside the heating chamber (12).

Description

Electric furnace for china and porcelain}

The present invention relates to an electric kiln for ceramics, and more particularly to an electric kiln for ceramics of a new structure to reduce the oxidation or burning or discoloration of the glaze layer of the reduced porcelain.

In general, the firing of ceramics is divided into baking for baking pottery by keeping the temperature of the kiln at 800-900 ° C, and baking for baking pottery by raising the temperature of the kiln to 1200-1300 ° C by applying glaze to the baking. Lose. At this time, the fuel used to bake pottery is using wood, gas or electricity. However, when wood is used as a fuel, temperature control is not easy and fuel costs are very high. Therefore, a gas kiln using LP gas as a fuel is used when baking large quantities of ceramics. When the gas kiln supplies air to the kiln and burns the LP gas using a gas burner, an appropriate air flow is generated in the kiln, reducing salts are generated, and the glaze applied to the ceramics causes a reduction reaction. The inside of the kiln is maintained at a uniform temperature to uniformly fire the ceramics. At this time, the combustion gas generated when burning the gas is discharged to the outside through the exhaust pipe.

However, the gas kiln that burns porcelain using LP gas must continuously inject air at room temperature to burn the gas. Therefore, when supplying air at room temperature, a larger amount of gas is burned to raise the temperature. In addition, since the combustion gas generated by burning the gas must be discharged to the outside, not only can it cause pollution or environmental pollution, but if the gas is mishandled, there is a risk of explosion accident. there was.

Therefore, recently, a method of baking ceramics using an electric furnace equipped with an electric heater has been developed and used. 1 shows an example of an electric reduction kiln for ceramics developed by the present applicant and registered under Utility Model Registration No. 20-0292040. Referring to this, a heating chamber 12 is provided therein. An electric heater 2 is provided in the heating chamber 12, and a circumferential wall is provided with a kiln main body 10 having a plurality of ventilation windows 14, and a lower side of the heating chamber 12. The circulation fan 20 is connected to the circulation fan 20, and an intake passage 32 is formed at a central portion thereof, and an exhaust passage 34 is spaced apart from an inner wall surface of the heating chamber 12 at a circumferential portion thereof. The plate 30 is formed and a reducing agent supply pipe 40 for supplying a reducing agent into the heating chamber 12.

The circulation fan 20 circulates the heat in the heating chamber 12 by force, as well as uniformly supplying a reducing agent into the heating chamber 12, and the circulation fan 20 is formed in a disk shape disc ( 22 and a plurality of blades 24 radially spaced apart from the upper surface of the disk 22 by a predetermined angle. In addition, a through hole 26 penetrating in the vertical direction is formed between the blade 24 and the blade 24 of the disk 22 along the circumferential direction. Accordingly, the circulation fan 20 sucks the heat of the heating chamber 12 through the intake passage 32 of the separator 30 and purifies it to be discharged through the exhaust passage 34, thereby heating the chamber 12. The entire interior is configured to maintain a uniform temperature.

The reducing agent supply pipe 40 is provided to be aligned with the through hole 26 of the disk 22 of the circulation fan 20, the lower side of the kiln body 10, the reducing agent supply pipe 30 LP gas which is not shown in the reducing agent Tank and blower are connected. Therefore, the LP gas as the reducing agent and the outside air are mixed and introduced through the through hole 26 between the blade 24 and the blade 24 of the disk 22 of the circulation fan 20 through the reducing agent supply pipe 30. When mixed with the circulating heat in the heating chamber 12 and introduced in the radial direction inside the heating chamber 12 by the blades 24, the LP gas introduced into the heating chamber 12 is burned while reducing salt, that is, glaze A spark is generated to cause a reduction reaction, and the glaze causes a reduction reaction, causing the porcelain to be baked in a light blue purple.

Reference numeral 16 is a shelf on which the ceramics 4 can be placed in the heating chamber 12.

According to this configuration, the electric kiln circulates the heat inside the heating chamber 12 by using the circulation fan 20, the entire interior of the heating chamber 12 maintains a uniform temperature, the heating chamber 12 A plurality of ceramics 4 disposed therein may be heated to uniform temperatures, respectively, to produce a uniform quality product. In addition, at 800-900 ° C. at which the reduction reaction of the glaze occurs, LP gas, which is a reducing material, is introduced between the blades 24 and the blades 24 through the through holes 26 of the reducing agent supply pipe 30 and the circulation fan 20, and then, a heating chamber. (12) After the reducing salt is generated by the internal heat and mixed and circulated in the heating chamber 12, the glaze applied to the porcelain 6 undergoes a reduction reaction and calcined so as to be baked in a subtle blue purple. Open the ventilation window 14 to cool the fired ceramics.

By the way, the conventional electric kiln is to maintain the temperature of the heating chamber 12 at the time of roasting chaebol to burn pottery, so when the natural cooling by opening the ventilation window 14 of the kiln body 10, heating As the temperature of the seal 12 slowly cools, it takes a long time for the glaze to drop to a temperature of 800 to 900 ° C. or less at which no reduction reaction occurs, and the glaze layer of the porcelain reduced by the cooling delay is oxidized by external air and burns. There is a problem that is discolored or cloudy.

The present invention is proposed to solve the problems as described above, an object of the present invention is to reduce the temperature of the heating chamber rapidly by introducing an external air into the heating chamber by the blowing fan to reduce the glaze layer of the porcelain due to the cooling delay It is to provide a ceramic electric kiln with a new structure that can reduce burning and discoloration.

1 is a block diagram showing a conventional electric kiln for ceramics

Figure 2 is a front cross-sectional view of the electric kiln for ceramics according to the present invention

3 is a cross-sectional view taken along the line A-A of FIG.

<Description of the symbols for the main parts of the drawings>

2. Electric Heater 4. Ceramics

10. Kiln main body 20. Circulation fan

30. 40. Reductant supply pipe

50. Drive motor 60. Air supply line

70. Blowing fan

According to the present invention, the heating chamber 12 is provided inside and the circumferential wall is a kiln main body 10 having a plurality of ventilation windows 14, the electric heater 2 provided in the heating chamber 12, The circulation fan 20 which is provided in the heating chamber 12 and purifies the hot air heated by the electric heater 2, and the reducing agent supply pipe 40 for supplying a reducing agent into the heating chamber 12 are provided. In the electric oven for ceramics included, one side of the heating chamber 12, the air supply pipe 60 is installed in communication with the outside and the air supply pipe 60 is provided with a blowing fan 70, the heating chamber 12 There is provided an electric kiln for ceramics, characterized in that the supply of cold air to the outside to cool the temperature inside the heating chamber (12).

Hereinafter, described with reference to the accompanying drawings, preferred embodiments of the present invention is as follows. 2 to 3 illustrate an example of an electric reduction kiln for porcelain according to the present invention. Referring to this, the electric oven for porcelain is provided with a heating chamber 12 therein and a plurality of ventilation windows 14 on the upper circumferential wall. ) Is provided with a kiln body 10, the electric heater 2 provided in the heating chamber 12, and the high temperature hot air provided under the heating chamber 12 and heated by the electric heater (2) And a circulation fan 20 for purifying the exhaust fan 20, and an intake passage 32 formed in the center of the circulation fan 20, and spaced apart from the inner wall surface of the heating chamber 12 in the circumferential portion thereof. ) Is provided with a partition 30 and the reducing agent supply pipe 40 for supplying a reducing agent into the heating chamber 12 is the same as the conventional.

In addition, an air supply pipe 60 to supply the outside air to the heating chamber 12 to cool the temperature of the heating chamber 12 to the bottom of the kiln body 10 to the outside of the kiln body 10. It is installed in communication. The air supply pipe 60 is buried along the bottom circumference of the kiln body 10 and branched from the main tube 62 to the outside of the kiln body 10 at the center or one side thereof. And a branch pipe 64 vertically installed along the circumference of the heating chamber 12 to be aligned with the exhaust passage 34. In addition, the main pipe 62 communicated with the outside is provided with a blowing fan 70 so as to supply the outside air into the heating chamber, and is supplied to the inside of the outside air heating chamber by the blowing fan 70 to heat the heating chamber ( 12) It is configured to rapidly lower the internal temperature.

Reference numeral 16 is a shelf on which the ceramics 4 can be placed in the heating chamber 12.

According to this configuration, the electric kiln for ceramics, as in the case of chaebol, when the temperature of the heating chamber 12 is maintained at 1200 ~ 1300 ℃ firing ceramics and cooling the temperature of the heating chamber 12, the ventilation window 14 By opening the cold air to the outside in the heating chamber 12 by the blowing fan 70 forcibly cools the temperature inside the heating chamber 12 to 800 ~ 900 ℃ or less, and the conventional and Likewise, it is possible to prevent the glaze layer of the reduced ceramics from being oxidized or discolored due to the cooling delay.

According to the present invention as described above, when firing and cooling the ceramics by maintaining the heating chamber temperature at 1200 ~ 1300 ℃ as in the case of chaebol, forced air flow into the heating chamber by the blowing fan forcibly Since it is rapidly cooled to 800 ~ 900 ℃ or less, there is an advantage that can prevent the glaze layer of the ceramics reduced due to the cooling delay as oxidized or discolored as in the prior art.

Claims (1)

A heating chamber 12 is provided inside the kiln main body 10 having a plurality of ventilation windows 14 formed on the circumferential wall, an electric heater 2 provided in the heating chamber 12, and the heating chamber 12. ) Is provided in the interior and includes a circulating fan 20 to purify the hot air heated by the electric heater 2, and a reducing agent supply pipe 40 for supplying a reducing agent into the heating chamber 12, electric In the kiln, one side of the heating chamber 12 is provided with an air supply pipe 60 is communicated to the outside and the air supply pipe 60 is provided with a blower fan 70, the outside cold inside the heating chamber 12 Electric kiln for ceramics, characterized in that to supply air to cool the temperature inside the heating chamber (12).