KR101796082B1 - Apparatus for opening and method for opening - Google Patents

Abstract

The present invention relates to an opening device, and an opening method. The opening method to open an outlet of a furnace comprises: a process of preparing the opening device; a process of rotating a rod of the opening device to be inserted into a wall of the furnace; and a process of injecting cooling fluid to a surface of the rod. The present invention is able to efficiently open the outlet in the wall of the melting furnace of high temperature.

Description

[0001] APPARATUS FOR OPENING AND METHOD FOR OPENING [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a purging apparatus and a purging method, and more particularly, to a purging apparatus and method capable of efficiently opening an outlet to a wall of a high-temperature melting furnace.

Generally, in the steelmaking operation, the operation of discharging melted molten material from the high-temperature melting furnace to the outside is repeated at regular intervals. For example, in blast furnace operation, iron oxide and fuel cokes are fed at a proper ratio, and hot air is supplied from a hot air furnace to discharge the melted melted material to the outside through a reduction reaction in the blast furnace Repeat at regular intervals. In addition, the electric furnace operation repeats the process of charging iron scrap, coke and other additives into the electric furnace, applying electric power to the electrodes to generate melts, and discharging the melts to the outside.

In order to periodically discharge molten metal, for example, molten iron to the outside, it is necessary to perform an opening operation to open the outlet to the wall of the furnace, and to perform the closed work to block the outlet after the molten iron is spouted. In the laying operation, various pore devices are used to excavate the mud material closing the exit of the furnace wall or furnace to form openings through the wall.

In general, the drilling operation is performed using a hammering device or a drilling device. However, in the case of using a hammer ring device, it is difficult to ensure correct bathing due to the formation of blood vessels in the wall (refractory) constituting layer and the like by repetitive impact. Here, the blood clot forms a normal depth of the inside of the exit, and a cracked state is formed due to some cause, so that a molten iron or a slag flows out even though the outlet is not fully penetrated during the opening work.

Such a disadvantage can be solved to some extent by using a drilling apparatus, but the drilling apparatus has a problem that when the temperature of the molten material (molten metal, molten iron) is high, the load of the boring apparatus is spoiled. This problem may occur more seriously in an electric furnace where the temperature of the melt is high. Therefore, although various methods for preventing the melting of the rod of the piercing apparatus have been proposed, they are not yet sufficient for use in a high-temperature melting furnace.

KR 2001-0064781 A KR 1269154 B KR 0216577 Y

The present invention provides a piercing apparatus and method capable of preventing or suppressing the damage of a rod.

The present invention provides a porous apparatus and method that can be stably used even at a high temperature.

A piercing apparatus according to an embodiment of the present invention is a piercing apparatus that opens an outlet of a furnace, comprising: a rod extending in one direction; A driver connected to the rod so as to rotate the rod; And a shock absorber coupled to the rod to inject a cooling fluid to the surface of the rod.

Wherein the shock absorber comprises: a support unit for supporting the rod and having a passage portion through which the cooling fluid passes; And a supply unit communicating with the passage portion to supply a cooling fluid to the support unit.

The passage portion of the support unit may include an inlet connected to the supply unit, an internal passage connected to the inlet and formed in the interior of the support unit, and an ejection port connected to the internal passage and ejecting a cooling fluid outwardly.

The jetting port surrounds at least a part of the rod, and the diameter of the jetting port may be larger than the diameter of the rod.

And the jetting angle can be adjusted so that the cooling fluid is jetted toward the rod.

The passage portion of the support unit may further include an extension pipe connected to the injection port and extending along the rod.

The supply unit may include an inlet portion, a path portion connected to the inlet portion, and a discharge portion connected to the path portion of the one end and to the path portion of the support unit.

The supply unit may further include an auxiliary supply unit for supplying auxiliary fluid.

The path portion may include a first pipe connected to the inlet portion, and a nozzle formed at an end portion of the first pipe and communicating with the discharge portion.

The path portion may include a first pipe connected to the inlet portion, a nozzle formed at an end of the first pipe and communicating with the discharge portion, an outer pipe surrounding the first pipe and the nozzle and connected to the auxiliary supply portion have.

A blade is connected to the end of the rod, and the diameter of the blade may be larger than the diameter of the rod.

According to an embodiment of the present invention, there is provided a method of laying out an outlet of a furnace, comprising the steps of: providing a furnace; A step of rotating the rod of the opening device and inserting the rod into the wall of the furnace; And spraying a cooling fluid onto the surface of the rod.

The cooling fluid injection process may include a step of injecting cooling fluid in the direction of extension of the rod to cool the rod as it flows along the surface of the rod.

The cooling fluid injection process may include a process of generating droplets of water by mist.

The cooling fluid injection process may include a process of introducing an auxiliary fluid to assist spraying of the mist.

The auxiliary fluid may comprise nitrogen. ,

The furnace may include an electric furnace or a furnace.

According to embodiments of the present invention, the rod can be efficiently cooled by moving the cooling fluid along the rod surface of the porous apparatus. From this, it is possible to open an outlet (outlet port, outlet port) to the high-temperature melting furnace while preventing or suppressing the loss of the rod.

Since the rod is efficiently cooled, it is possible to stably perform the piercing operation even at a high temperature, for example, at a temperature in a region where iron exists in a liquid phase.

In addition, since the cooling water is dripped and sprayed in a mist state, the water trap by the molten material (molten iron, molten metal) can be minimized, and the danger of hydrogen explosion can be eliminated or remarkably suppressed.

As such, since the opening work can be performed smoothly, it is possible to prevent or suppress the occurrence of vacancy in the bathtub due to blood clots or refractory erosion which have occurred in the conventional open work, and effective tapping work can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 schematically shows a structure of a general electric furnace; FIG.
2 is a view schematically showing a state in which a pit apparatus is installed in a furnace according to an embodiment of the present invention.
3 is a schematic view of a pit apparatus in accordance with an embodiment of the present invention.
Figure 4 is a partial enlarged view of the end of Figure 3;
5 is an enlarged view of a portion shown in Fig.
6 is a schematic view showing the structure of a supply unit in a piercing apparatus according to an embodiment of the present invention;

Hereinafter, embodiments of the present invention will be described in detail. It will be apparent to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, It is provided to let you know. Further, the drawings may be exaggerated to illustrate the present invention.

The present invention relates to an apparatus for opening an outlet for discharging a molten material to a wall of a furnace for producing a molten metal such as molten metal or molten iron using various raw materials. For example, the airborne apparatus can be used in a blast furnace, an electric furnace or the like having a general structure. Here, an electric furnace for producing a relatively high-temperature melt is exemplarily described. Of course, it can be applied to various high temperature furnaces.

1 is a schematic view showing a structure of a general electric furnace. FIG. 2 is a schematic view showing a state in which a preexisting apparatus according to an embodiment of the present invention is installed in an electric furnace.

The electric furnace is a device for charging iron scrap, coke and other additives into the furnace body 10, and applying power to the electrodes 20 to produce the melts M. The wall of the furnace body 10 may comprise an iron shell 11 and a refractory 12 disposed therein and may also be provided with an outlet 30 through the wall. When the melt of the desired composition is produced in the electric furnace, the melt (M) in the furnace 10 is periodically discharged to the outside through the outlet (30). For example, when manufacturing ferro-silicon (FeSi), high-grade silica is charged into an electric furnace (for example, SAF (Submerged Arc Furnace)) with iron scrap, coke and other additives, (20) is supplied with power to produce molten ferrosilicon. At this time, the electric furnace can be operated without stopping for 24 hours, and the tapping work is carried out through the openings and closed works on the average of 2 to 3 hours. That is, the outlet 30 is opened by inserting the rod of the opening device 100 (see FIG. 2), the molten material M is discharged (tap water), and when the discharge is finished, the outlet 30 is closed to the muddy material do. The tapping temperature of FeSi is high at an average of 1,650 ~ 1,700 ℃. This is the high temperature of the region where iron (Fe) exists in liquid phase. Therefore, it is important to prevent the damage of the rod in the opening device 100 used when the outlet 30 is opened. Hereinafter, the piercing apparatus 100 according to the embodiment of the present invention will be described in detail.

FIG. 3 is a schematic view of a pit apparatus according to an embodiment of the present invention. Fig. 4 is a partially enlarged view of the blade-side end portion of Fig. 3, and Fig. 5 is an enlarged view of the portion shown in Fig.

Referring to FIG. 3, a porous apparatus 100 according to an embodiment of the present invention is a porous apparatus that opens an outlet 30 of a furnace, and includes a rod 120 extending in one direction, And a shock absorber 130, 150 coupled with the rod 120 to inject a cooling fluid to the surface of the rod 120 and the actuator 140 coupled to the rod.

The rod 120 is a rod-shaped element that extends in one direction, and a driver 140 is connected to one end and a blade 110 is connected to the other end. The rod 120 is a means for inserting into the furnace wall and opening the outlet 30 directly with the blades 110. Where one direction may be the longitudinal direction of the rod 120. The rod 120 may have a cylindrical rod shape, but its shape is not particularly limited. The rod 120 is generally made of iron and is not particularly limited in material.

The blades 110 are means for performing drilling while rotating, and may include a plurality of flake edges. As shown in FIG. 4, the blade 110 may be manufactured in such a shape that the width increases from the portion connected to the rod 120 toward the end portion, or may be formed to have the same width. Further, the blades 110 can be arranged with the flake edge radially. However, the shape of the blade 110 is not particularly limited. The width of the blade 110 is larger than the width of the rod 120. That is, the diameter D2 of the blade 110 cross section is larger than the diameter D1 of the rod 120 cross section. At this time, when the width (diameter) of the blade 110 varies along the longitudinal direction, the diameter of the blade 110 changes according to its position. For example, in the case of the shape shown in FIG. 4, the diameter becomes larger than the diameter of the rod 120 toward the end of the blade 110. Of course, when the width of the blade 110 is a shape that does not change in the longitudinal direction, the diameter of the blade 110 becomes constant. The average diameter of the blades 110 may be greater than the average diameter D1 of the rods 120 and the maximum diameter of the blades 110 may be greater than the average diameter D1 of the rods 120. [ The blade 110 is generally made of iron. Since the blade 110 directly excavates the mud material, the outlet can be opened with a diameter of the blade 110, in particular a maximum diameter size of the blade 110, and the rod 120 can be located within the outlet. In addition, since the diameter D1 of the rod 120 is smaller than the diameter D2 of the blade 110, a gap is created between the inner wall of the outlet and the rod 120, do. That is, the cooling fluid can flow along the surface of the rod 120 in the longitudinal direction of the rod 120. The length L from the portion where the rod 120 and the shock absorbers 130 and 150 are connected to the end of the blade 110 can be determined according to the depth of the exit to be opened. That is, if the depth of the outlet is deep, the length L can be adjusted to be long.

The actuator 140 is connected to the rod 120 to rotate the rod 120. In other words, the driver 140 may fix the rod 120 inside and rotate the rod 120 using a rotating body and a motor. For example, it may include a rotary electric motor. The driver 140 can adjust the rotational speed and the like when the outlet 130 is opened.

The shock absorbers 130 and 150 are coupled to the rod 120 by a component that injects a cooling fluid to the surface of the rod 120. As shown in Fig. 3, the shock absorber may be installed in front of the driver 140. Fig. However, the position is not particularly limited. The shock absorber may include a support unit 130 that supports the rod 120 and has a passageway through which the cooling fluid passes, and a supply unit 150 that is in communication with the passageway to supply the cooling fluid to the support unit.

The support unit 130 includes a body 135 and a passageway formed in the body 135. The body 135 is a structure having a through hole, and the rod 120 is mounted in the through hole. The body 135 can be manufactured to a size sufficient to support the rod 120, and the size and shape thereof are not particularly limited.

The passageway is a fluid path through which the cooling fluid is passed and which is ejected. The passage portion includes an inlet 131 connected to the supply unit 150, an internal passage 132 connected to the inlet 131 and formed in the interior of the support unit 130, an internal passage 132 connected to the external passage 132, (Not shown). The inlet 131 is the inlet of the cooling fluid from the supply unit 150 in the form of a tube having a space therein. And is connected to the discharge portion 151 of the supply unit 150, which will be described later. The inlet 131 and the outlet 151 are communicated with each other so that the cooling fluid can pass therethrough, and the connection method thereof is not particularly limited. The inner passage 132 is a space formed inside the body 135 of the support unit 130 and serves to connect the inlet 131 and the injection port 133 with each other. It may be manufactured in the form of a tube having a passage therein, and its shape is not particularly limited. The injection port 133 is opened at one end in the direction in which the rod 120 extends and the other end is connected to the internal passageway 132 to inject the cooling fluid from the internal passageway 132 into the open end . At this time, the jetting port 133 may be formed to surround at least a part of the rod 120. That is, as shown in FIG. 3, the injection port 133 may surround a part of the rod 120 located in the body 135 of the support unit. In this case, the cooling fluid can be injected into the entire radial outer circumferential surface of the rod 120 through the injection port 133, and the thus injected cooling fluid flows toward the blade 110 along the longitudinal direction of the rod 120. 5, the diameter of the injection port 133, in particular, the diameter D3 of the open end of the injection port 132 is larger than the diameter D1 of the rod 120. As shown in Fig. The diameter D3 of the injection port 132 may be less than or equal to the diameter D2 of the blade 110, in particular, the maximum diameter of the blade 110. [ When the diameter D3 of the injection port 132 is increased to the diameter D2 of the blade 110, the cooling fluid is injected in a large amount in a direction other than the longitudinal direction of the rod 120, which is not efficient.

Further, the jetting angle 133 can be adjusted so that the cooling fluid is jetted toward the rod 120. For example, as shown in Fig. 5A, the inner wall of the jetting port 133 may be made oblique to adjust the jetting direction of the cooling fluid and the jet flow rate. At this time, the inner diameter of the jetting port 133 can be gradually narrowed toward the open end. The injection port 133 may be provided with an extension pipe 134 connected thereto and extending along the rod 120 (FIG. 5 (b)). From this, the injection path of the cooling fluid can be adjusted more precisely. The length of the extension pipe 134 may be a length that does not interfere with the opening of the outlet 30 of the furnace while allowing the cooling fluid to adhere to the surface of the rod 120. The diameter D4 of the extension pipe 134 may be equal to or smaller than the diameter D3 of the injection port 133. [ Further, the extension pipe 134 may be formed to have a smaller diameter toward the end.

6 is a schematic view showing a structure of a supply unit in a piercing apparatus according to an embodiment of the present invention.

The supply unit 150 is for supplying a cooling fluid to the support unit 130 and includes an inlet part 152 and a path part 153 connected to the inlet part 152. One end of the path part 153 is connected to the path part 153 And the other end includes a discharge portion 151 which is connected to the passage portion of the support unit 130. The inlet part 152, the path part 153 and the discharge part 151 may be provided in the housing 155 having a predetermined volume or may be manufactured without a separate housing. The inlet portion 152 may be formed in a tubular shape having a space therein to receive the cooling fluid from the outside.

The path portion 153 receives the cooling fluid from the inlet portion 152 and changes the state of the cooling fluid. The path portion 153 includes a first pipe 153a connected to the inlet portion 152 and a nozzle 153b formed at an end portion of the first pipe 153a and communicating with the discharge portion 151. [ From this, the path portion 153 passes the cooling fluid through the first pipe 153a, and changes the state of the cooling fluid by the nozzle 153b and discharges it. For example, when water (H ₂ O) is used as a means for cooling the rod 120, liquid water continuously flowing through the inlet portion 152 is supplied to the water passing through the first pipe 153a Is jetted by using the nozzle 153b, droplets are formed by fine droplets, and the droplets are discharged in a mist state. This is similar to the way a sprayer ejects mist. Of course, you can also create mitres in a variety of ways. Then, the mist discharged to the nozzle 153b can be introduced into the passage portion of the support unit 130. [

Further, the supply unit 150 may further include an auxiliary supply unit 154 for supplying auxiliary fluid. Auxiliary fluid is supplied to assist in the state change of the cooling fluid and to improve the cooling efficiency. As the auxiliary fluid, a gas having low reactivity with the cooling fluid can be used. For example, nitrogen can be used as an auxiliary fluid. The auxiliary fluid may be supplied directly to the first pipe 153a or may be supplied to a separate space outside the first pipe 153a. In this case, as shown in Fig. 6, the path unit 153 of the supply unit may include the first tube 153a described above and the second tube 153c surrounding the nozzle 153b. That is, the first pipe 153a and the second pipe 153c may be in the form of a double pipe acting as an inner pipe and an outer pipe. At this time, the end of the second pipe 153c may be connected to the discharge unit 151, and the auxiliary supply unit 154 may be connected to the middle area of the second pipe 153c. Since the supply unit 150 having such a structure uses water as a cooling water and auxiliary fluid nitrogen, it is possible to efficiently convert water into mist, and to control the flow rate of nitrogen and the inflow rate of nitrogen to effectively control the mist spraying . Further, since the nitrogen is sprayed together with the mist on the surface of the rod 120, the rod 120 can be cooled more efficiently.

In the above description, the cooling fluid or the cooling fluid and the auxiliary fluid are supplied to the rod surface of the opening device to cool the rod, but the structure may further include a structure for additionally supplying these fluids. For example, the porous apparatus may include a structure that allows passage of the fluid into the rod by forming a path through the inside of the rod. In addition, the opening device may include a path passing through the inside of the rod and a spray hole formed on the surface of the rod by being connected to the path to allow the fluid to pass through and discharge through the rod inner path and the spray hole .

The following describes the process of opening the exit to a furnace where high temperature such as a blast furnace or an electric furnace is generated.

A method of opening the outlet of the furnace includes a process of providing a perforation device in the vicinity of the furnace, a process of inserting the furnace into a furnace, and a process of injecting a cooling fluid onto the surface of the furnace. That is, the above-mentioned airborne apparatus is provided on the side wall of the furnace, and the cooling fluid is sprayed onto the rod surface while rotating the blades and the rod to excavate the mud material. At this time, the cooling fluid flows along the surface of the rod to inject the cooling fluid in the direction of extension of the rod to cool the rod. Since the rod is made of a material having a high thermal conductivity, if the cooling fluid is moved along the surface, the entire rod can be efficiently cooled. At this time, the cooling fluid injected into the rod can be used as a mist produced by dripping water. That is, mist of fine droplets of water is sprayed onto the rod. The use of mist as the cooling fluid can minimize the moisture trap by the melt in the furnace (eg hot wire) even if the mist is injected into the furnace and travels along the rod surface. Further, auxiliary fluid for assisting the generation and spraying of the mist may be injected together with the rod. At this time, nitrogen can be used as auxiliary fluid.

In the case where the outlet of the furnace is opened in the above-described manner, the furnace operation is performed while cooling the rod, so that the furnace operation can be performed at a desired sufficient depth (depth of pore). Further, while the operation of the blast furnace or the electric furnace is continued without stopping, the open operation can be repeatedly performed without damaging the load.

Although the present invention has been described in detail with reference to the specific embodiments thereof, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be defined by the appended claims, as well as the appended claims.

100: Opening device 110: Blade
120: rod 130: support unit
140: actuator 150: supply unit

Claims (17)

As an opening device for opening the outlet of the furnace,
A rod extending in one direction;
A blade connected to an end of the rod;
A driver connected to the rod so as to rotate the rod; And
And a shock absorber coupled to the rod to inject a cooling fluid to a surface of the rod,
Wherein the shock absorber comprises: a support unit supporting the rod and having a passage portion through which the cooling fluid passes; And a supply unit communicating with the passage portion to supply a cooling fluid to the support unit,
Wherein the passage portion of the support unit includes an inlet connected to the supply unit, an internal passage connected to the inlet and formed inside the support unit, and an internal passage connected to the internal passage, And a jetting port for jetting a cooling fluid to flow toward the blade. The method according to claim 1,
Wherein the rod includes a path through which a cooling fluid can pass. delete The method of claim 2,
Wherein the injection port surrounds at least a part of the rod and the diameter of the injection port is larger than the diameter of the rod. The method of claim 2,
Wherein the injection opening adjusts the injection angle so that the cooling fluid is injected toward the rod. The method of claim 2,
Wherein the passage portion of the support unit further comprises an extension pipe connected to the injection port and extending along the rod. The method of claim 2,
Wherein the supply unit includes an inlet portion, a path portion connected to the inlet portion, and an outlet portion having one end connected to the path portion and the other end connected to the passage portion of the support unit. The method of claim 7,
Wherein the supply unit further comprises an auxiliary supply unit for supplying auxiliary fluid. The method of claim 7,
Wherein the path portion includes a first pipe connected to the inlet portion, and a nozzle formed at an end portion of the first pipe and communicating with the discharge portion. The method of claim 8,
The path portion may include a first pipe connected to the inlet portion, a nozzle formed at an end portion of the first pipe and communicating with the discharge portion, an outer pipe surrounding the first pipe and the nozzle, Device. The method according to any one of claims 1, 2 and 4 to 10,
Wherein the diameter of the blade is larger than the diameter of the rod. As an opening method for opening the exit of the furnace,
A process of preparing a porous device;
A step of rotating the rod of the opening device and inserting the rod into the wall of the furnace;
Spraying a cooling fluid onto the surface of the rod; And
And passing a cooling fluid through the inside of the rod ,
Wherein the cooling fluid injection process injects the cooling fluid in the direction of extension of the rod to cool the rod as it flows along the surface of the rod. delete The method of claim 12,
Wherein the cooling fluid injection process comprises the step of generating droplets of water by mist. 15. The method of claim 14,
Wherein the cooling fluid injection process includes the step of introducing an auxiliary fluid for assisting injection of the mist. 16. The method of claim 15,
Wherein the auxiliary fluid comprises nitrogen. The method according to any one of claims 12 to 14,
Wherein the furnace comprises an electric furnace or a furnace.

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