KR19980025571U - Automatic preheating device for exit closure - Google Patents

Abstract

The present invention is a mud of the exit closure material, that is, the mud, which is filled in the exit closure device installed to close the exit port when the discharge of the molten iron among the several exits installed to discharge the pig iron to the outside of the furnace. The present invention relates to an automatic automatic preheating device of a outlet closure material, which allows a more stable and effective outlet closure by preheating and keeping warm at an appropriate temperature. The body 1 for accommodating the mud material 14 includes cooling water, high temperature water, or high temperature. A circulation water flow path 8 for distributing steam is formed, and the body 1 is provided with a preheating temperature sensor 3 capable of sensing the temperature of the mud material 14 therein and according to the detected temperature. It is characterized in that any one of cooling water, hot water, or hot steam flows into the circulation water flow path (8).

Description

Automatic preheating device for exit closure

The present invention relates to a molten iron outlet, that is, a closing device of the outlet port, which has a function to discharge the melt in the furnace to the outside of the furnace, and more specifically, the pig iron present in the molten state in the molten furnace to the outside of the furnace. It is more stable and safer by preheating and warming the outlet closure material, that is, the mud, filled in the inside of the outlet closure device installed to close the outlet at the time when the charter discharge is completed. The present invention relates to an automatic automatic preheating device of a tap closure which enables effective tap closure.

In general, the outlet port, which is the melt outlet of the furnace, is configured to close the outlet by pressurizing a specific high temperature curable material, that is, a mud material, to the piston in the device by a mud gun, a device that closes the outlet at the end of the melt discharge. And an approximate configuration thereof is shown in FIG. 1.

Normally, the furnace is set according to the daily amount of molten iron and the like, and several outlets corresponding to the scale are formed in the circumferential direction of the lower side to facilitate the discharge of the melt in the furnace. The discharged melt is discharged sufficiently, and when the discharge is completed, the closing material filled in the closing device is pressurized and discharged into the exit port to close the exit port, and the operation of discharging the melt by opening another exit port is repeated. In normal operation, this is done several times a day in succession.

The closing material used is a kind of refractory, which maintains a certain form in a solid state at room temperature, but when heated to a constant temperature, it changes to an amorphous semi-solid state, and is hardened and fired at high temperatures at high temperatures. Since it is possible to pressurize and discharge by the piston 9 of the outlet closing device only when it is preheated to an appropriate temperature and is in a semi-solid state, it prevents mechanical overload of the device and prevents large accidents such as facility protection and closing failure. In order to prevent this, it is common to perform preheating and operation by the method of electric preheating or heating directly to the lower part of the shredding body 1 with a gas burner.

However, in the case of the former, it is transported to a preheated state at a predetermined temperature in a separate preheating device and is filled with the fuselage 1 so that its workability is extremely poor and exposed to the risk of burn accidents. It is very difficult to maintain the equipment due to the extra cost and space for the installation of the equipment and the huge amount of power consumption. In the latter case, the flame directly contacts the fuselage 1. As a result, deterioration of the equipment may occur, and the preliminary preheating may not be possible due to the cause of the increase in maintenance cost and the temperature difference between the lower and upper parts in direct contact with the flame. Delayed closing of the pioneer means that the melt is scattered from the starting outlet, making the worker inaccessible. It can cause major accidents such as burnout of equipment and safety disasters, which is a significant obstacle to facility management and stable operation. It was.

The present invention was devised to solve such a conventional problem, and its purpose is to close the exit at the time when the discharge of the molten iron among the several exits installed to discharge the pig iron existing in the molten state out of the furnace. By automatically preheating and warming the outlet closure material filled in the inside of the outlet closure device installed to the proper temperature, it is possible to operate stably and to eliminate the hazards and thus to make the outlet closure more stable and effective. An automatic preheating device for piling closures is provided.

Figure 1 is an external view showing a general outlet closing device equipped with an automatic closing device of the outlet closing material according to the present invention

Figure 2 is a schematic diagram showing a state of closing the outlet by the outlet closing device equipped with the device of the present invention

3 is a cross-sectional view schematically showing the distal end of the closing device having a tap opening closing material automatic preheating device according to the present invention

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

5 is a cross-sectional view taken along the line BB ′ of FIG. 3.

Explanation of symbols on the main parts of the drawings

1: fuselage

2: closing material inlet

3: temperature sensor

4: exit port compression surface

5: exit

8: circulating water flow path

14 mud ash

As a technical configuration for achieving the above object, the present invention is a filling material for closing the exit port, that is, a mud material in the exit port closing device for receiving the inside and extruding to the exit port side using a piston, the mud material The body for accommodating water forms a circulating water flow path for circulating cooling water, high temperature water, or high temperature steam. The body is provided with a preheat temperature sensor configured to detect the temperature of the mud material therein. According to the present invention is to provide an automatic exit pre-heating device of the outlet closure characterized in that any one of the cooling water, hot water, or hot steam flows in the circulation water flow path.

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

1 is an external view showing a general outlet closing device equipped with an automatic opening device of the outlet closing material according to the present invention, which has a cylindrical fuselage 1 capable of filling the closure material. The closing material inlet (2) is formed on the side, and the temperature for the preheating temperature control in order to sense the preheating temperature of the closing material so that the closing material closes the exit opening and can be preheated to an optimal temperature at which the operation of the apparatus can be performed smoothly. The detector 3 is mounted inside the fuselage, and the outlet squeezing surface 4 which is squeezed by the outlet 5 so as to penetrate the duct 7 built in the furnace so that the closure material does not leak outwards is provided at the tip of the closing device. Is formed.

Figure 2 is a schematic diagram showing a state of closing the exit port by the exit closure device equipped with the device of the present invention, the exit port 5 formed so that the device is operated to penetrate the inside of the furnace and the edible (7) It shows the state in which the tapping port pressing surface (4) is pressed in the state, in which state the molten iron flow path is blocked by the closing material (14), and the molten iron fish on the inner bottom surface 6 of the furnace is connected to the tap opening (5) When the discharge is completed through the flow path and the discharge is completed, the outlet closing device is operated so that the pressing surface 4 comes into close contact with the exit port, and the closing member 14 appropriately preheated in the fuselage 1 is connected to the piston 9. It is shown to block the external discharge of the molten iron by forcibly extruded to the closing member 14 to reach the inside of the furnace 6 through the outlet 5 and the flow path.

3 is a cross-sectional view schematically showing the distal end portion of the closing device having an automatic exit preheating device according to the present invention, wherein the closing material 14 introduced into the fuselage 1 through the closing material inlet 2 is outside the fuselage. In order to prevent the hardening plasticity phenomenon of the closure material 14 which is preheated by the heat conduction of the high temperature preheated water sent through a separate supply pipe (not shown), which is properly disposed on the side. The preheating temperature sensor 3 installed in the fuselage 1 allows the circulating water to be automatically controlled by hot water or cooling water.

In addition, it is preferable to allow rapid preheating by high temperature steam in consideration of the emergency operation state in which emergency preheating must be completed in a short time due to a change in operating conditions, which can be easily carried out even if it is not explained by those skilled in the art. There will be.

Meanwhile, as shown in FIG. 1, the outlet closing device is installed at a location close to the high temperature radiant heat emitted from the molten metal discharged from the blast furnace, and thus is sufficient to protect the device from the radiant heat. A method must be devised to prevent deterioration of the equipment and equipment, and as a means of this, when the closing device is in operation to close the outlet 5, that is, in the state shown in FIG. Since the equipment is exposed to the water, the cooling water is circulated to prevent deterioration of the equipment. On the contrary, when the operation is in the standby state, that is, the state shown in FIG. Preheat (14) evenly enough.

All of these functions are controlled automatically by setting the electronic valve to be supplied by selecting the high temperature circulating water (11), the cooling water (12), and the high temperature steam (13) by the preheat temperature sensor (3). In addition, a separate control system may be provided to allow selective operation according to the needs of the driver.

In this way, the preheating or cooling water circulating water may be drained and recovered through the drain pipe 10 to be reused as needed to minimize waste of resources.

FIG. 4 is a cross-sectional view taken along line AA ′ of FIG. 3, to avoid problems due to the molten iron without installing the circulation water flow path 8 on the lower side in contact with the molten iron discharged from the smelter and having a high temperature.

FIG. 5 is a cross-sectional view taken along line B-B 'of FIG. 3, in which the circulation passage 8 is installed in the body 1 in the circumferential direction to enable uniform preheating of the closed material, and also to enhance the cooling function. It is a structure that can contribute to the surface extension of the equipment by completely protecting the accessory equipment such as the piston 9 from high heat and preventing the deterioration of the equipment.

As described above, according to the automatic exit preheating device of the tap opening device according to the present invention, the tap opening is completed at the time when the discharge of the molten iron out of several taps installed to discharge the new iron existing in the molten state to the outside of the furnace. The outlet closure material filled in the exit closure device installed for closing, that is, the hot mud material or coolant can be distributed to the outer surface of the exit closure device filled with the mud. Preheating and warming to an appropriate temperature or cooling if necessary has a good practical effect that enables more stable and effective outlet closure.

Claims (2)

In the outlet closure device for receiving the filling material for closing the outlet port, that is, the mud material 14 therein and extruding to the outlet port side using the piston 9, The body 1 for accommodating the mud material 14 is provided with a circulating water flow path 8 for circulating cooling water, high temperature water, or high temperature steam, and an internal mud material 14 in the body 1. Preheating temperature sensor (3) is installed to detect the temperature and the outlet opening characterized in that the cooling water, hot water, or hot steam flows in the circulation water flow path (8) according to the detected temperature Re automatic preheating device. The method of claim 1, The circulating water flow passage 8 is installed in the upper half at the front side, and the exit opening automatic preheating device, characterized in that formed in both the upper, lower half.