KR20090114229A - Apparatus for removing slag attached to lance - Google Patents

Abstract

PURPOSE: An apparatus for removing slag attached on a lance is provided to reduce work load of an operator, and to extend an exchange period of a slag removing knife while preventing abrasion of the knife. CONSTITUTION: An apparatus(10) for removing slag attached on a lance comprises a body(20), a slag removing unit(30), and a cooling device(40). The body is arranged on the top of a converter, and the lance passes through the body. The slag removing unit removes the slag attached on the lance. The cooling unit is formed on the body to cool the slag removing unit. The slag removing unit includes a slag removing knife(31), a knife supporter(32), and a pin member(33). The slag removing knife is connected with the body.

Description

Lance now removing device {Apparatus for removing slag attached to lance}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lance now removing device, and more particularly to a lance now removing device, wherein the now removing means is heated by heat transferred from the hot now attached to the lance with cooling means capable of cooling the now removing means of the lance now removing device. A lance now removing device that can prevent deformation.

The molten iron produced in the blast furnace (not shown) is transferred to the converter 1 as shown in FIG. 1 and is made of molten steel through refining in the converter 1.

As shown in the converter 1, oxygen is blown through the lance 2 to promote the oxidation reaction during the refining operation.

The lance 2 may enter or exit the converter 1 through a lance hole 3 whose one end is formed above the converter 1.

As shown in Fig. 1, the lance hole 3 is provided with a lance now removing device 100 in communication therewith.

As shown, the lance 2 is fixed to the guide bogie 4 which is movable up and down along the guide beam 5.

In addition, the guide trolley 4 is connected to the lance drive device 7 by the wire rope 6.

Therefore, when the guide bogie 4 moves up and down along the guide beam 5 by the wire rope 6 by the drive of the lance drive device 7, the lance 2 fixed to the guide beam 5 also moves up and down. Is moved.

As a result, one end of the lance 2 can be inserted into and removed from the converter 1.

The lance 2 assists in the refining operation by supplying oxygen into the converter 1 at a predetermined position in the converter 1 during the refining operation of the converter 1.

In this process, the oxygen blown into the converter 1 at supersonic speed and the molten steel in the converter 1 spring up to meet each other, and the now 8 is attached to the lance 2 as shown in FIG.

Moreover, now 8 is attached to the lance 2 also by the phenomenon that the slag thrown in order to remove an unnecessary element swells.

The sheath 8 attached to the lance 2 as above is removed by the lance now removing device 100 as shown in FIG.

The lance now removing device 100 is composed of a device body 200 is installed in communication with the lance hole 3 of the upper portion of the converter (1) and the now removing means 300 is installed on the device body (200).

The upper portion of the device body 200 is provided with a guide 210 to facilitate the inflow of the lance (2).

The now removing means 300 is connected to the now removing knife 310 and the now removing knife 310 rotatably connected to the device body 200 and rotatably together with the now removing knife 310 device body 200. It consists of a pin support 330 to rotatably connect the knife support 320 and the now removing knife 310 and the knife support 320 to the device body (200).

FIG. 3 shows the removal of the now 8 attached to the lance 2 using the lance now removing device 100.

After blowing oxygen into the converter 1, one end of the lance 2 is lifted up by the lance driving device 7 and drawn out of the converter 1.

At this time, as shown in FIG. 3, the now 8 attached to the lance 2 comes into contact with the now removing knife 310 of the lance now removing device 100.

When the now 8 comes into contact with the now removing knife 310, the now removing knife 310 and the knife support 320 rotate together by a force for raising the lance 2.

Now when the removal knife 310 and the knife support 320 is rotated together, the rotation stops when the locking bar formed on the knife support 320 touches the locking jaw formed in the device body 200.

At this time, if the lance 2 continues to rise, the force to scrape down the now 8 by the now removing knife 310 acts on the now 8.

As a result, the seams 8 attached to the lance 2 are removed from the lance 2.

The now 8 attached to the lance 2 has a temperature of about 1600 ° C.

Thus, while the now-removing knife 310 touches the now 8 and removes the now 8, the now removing means 30 from the hot now 8, i.e. the now removing knife 310 and the knife support ( 320 is transferred to the fin member 330.

Due to this heat transfer, thermal deformation occurs in the now-removing knife 310, the knife support 320, and the pin member 330.

When the heat deformation occurs, the properties of the material constituting the knives 310 and knife support 320 and the pin member 330 now changes.

For example, strength and hardness are lowered.

Therefore, there is a problem that the progress speed of the now removing knife 310 or the knife support 320 is worn faster.

Accordingly, there is a problem that the replacement cycle of the removal knife 310 is now faster, thereby increasing the workload of the worker.

In addition, there was a problem that the manufacturing cost of molten steel increases.

Further, the pin member 330 is broken when the attachment state of the now 8 attached to the lance 2 is bad, that is, when excessive force acts on the now removing knife 310.

Accordingly, the force acting on the now 8, i.e., the force preventing the rise of the lance 2, is removed by the now removing knife 310, so that the lance 2 can be raised smoothly.

However, if the fin member 330 is thermally deformed by the heat transferred from the hot 8, and the property of the material is changed, the fin member 330 is not broken at the time when it is to be broken, for example, it is bent or bent.

Therefore, the rise of the lance 2 is hindered, causing problems such as lifting the lance hole 3, damaging the lance drive device 7, or breaking the wire rope 6, such as equipment accidents.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a lance now removing device with cooling means capable of cooling the now removing means of the lance now removing device, from a high temperature from now. It is to provide a lance now removing device that can prevent the heat deformation of the now removing means by heat transfer.

In order to achieve the above object, the present invention is disposed above the converter and the device body through which the lance passes;

Now removing means provided in the device body for removing the now attached to the lance; And

Cooling means provided in the apparatus body to cool the now removing means;

Provides a lance now removing device configured to include.

More preferably, the now removing means comprises a now removing knife rotatably connected to the device body `body; A knife support connected to one side of the now removing knife and rotatably connected to the apparatus body together with the now removing knife; And a pin member rotatably connecting the now removing knife and the knife support to the device body.

More preferably, the cooling means is connected to the cooling fluid supply source cooling fluid supply pipe for supplying a cooling fluid; And one or more injection nozzles provided in the cooling fluid supply pipe for injecting cooling fluid toward the now removing means. It includes.

More preferably, the cooling fluid supply pipe is provided in the apparatus body so that the cooling fluid is injected to the now removing knife included in the now removing means through the injection nozzle.

More preferably, the apparatus body further includes a cooling fluid supply pipe having one or more injection nozzles so that the cooling fluid is injected to the knife support included in the now removing means.

More preferably, the apparatus body further includes a cooling fluid supply pipe having one or more injection nozzles so that the cooling fluid is injected into the fin member included in the removing means.

More preferably, the now removing knife is provided with a wear protection tip.

According to the present invention, it is possible to prevent thermal deformation of the now-removing knife and knife support and pin member forming the now-removing means by the heat transmitted from the high-temperature now attached to the lance to the now-removing means of the lance now-removing device. have.

Accordingly, there is an effect that it is possible to prevent the wear of the now removing knife caused by the heat deformation and the replacement cycle of the now removing knife faster.

Therefore, there is an effect that the work load of the worker is reduced.

In addition, there is an effect that the molten steel manufacturing cost is lowered.

In addition, there is an effect that it is possible to prevent equipment accidents appearing not broken when the pin member is broken due to thermal deformation.

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

Figure 4a is a perspective view of one embodiment of the lance now removing device according to the present invention, Figure 4b is a cross-sectional perspective view of one embodiment of the lance now removing device according to the present invention.

As shown, the lance now removing device 10 according to the present invention is disposed on the converter (1) and the device body 20 through which the lance 2 passes, and the device body 20 is provided in the lance (2) And a cooling means 40 provided in the apparatus body 20 to cool the now removing means 30 and the now removing means 30 to remove the now attached to it.

The upper portion of the device body 20 is provided with a guide 21 to facilitate the inflow of the lance (2).

Cooling of the now-removal removal means 30 heated by the heat transmitted from the high temperature now 8 through the cooling means 40 provided in the apparatus body 20 is achieved.

Now removing means 30 is one side is connected to the now removing knife 31 and the now removing knife 31 rotatably connected to the device body 20 and the device body 20 together with the now removing knife 31 A knife support 32 rotatably connected to the pin support 33 and a pin member 33 for rotatably connecting the now removed knife 31 and the knife support 32 to the apparatus body 20.

As shown in FIG. 3, when the lance 2 with the now 8 attached thereto is lifted by the lance drive 7, the now 8 is brought into contact with the now removing knife 31.

Due to the force acting on the now removing knife 31 by the now 8 as the lance 2 is raised, the now removing knife 31 and the knife support 32 rotate together.

Now, when the knife 31 and the knife support 32 is rotated together, if the hook formed on the knife support 32 touches the locking jaw (not shown) formed in the device body 20, the now remove knife 31 is You can no longer rotate.

At this time, a force for scraping down the now 8 attached to the lance 2 acts on the now removing knife 31.

As a result, the seams 8 attached to the lance 2 are removed.

In the present embodiment, the now removing knife 31, the knife support 32 and the pin member 33 is provided in the apparatus body 20, respectively three.

However, the number of the now-removing knife 31, the knife support 32, and the pin member 33 provided in the apparatus body 20 is not limited to this embodiment, but the number 8 of the knives 8 attached to the lance 2 is not limited to this embodiment. Any number can be removed as long as it can be removed smoothly.

4A, 4B and 5, the cooling means 40 is provided in the cooling fluid supply pipe 42 and the cooling fluid supply pipe 42, which are connected to the cooling fluid supply source 41 to supply the cooling fluid. But now includes one or more injection nozzles 43 for spraying the cooling fluid toward the removal means (30).

By the cooling means 40 by spraying the cooling fluid to the now removing means 30, the now removing means 30, i.e., the removing now knife 31, heated in contact with the now 8 which reaches a temperature of about 1600 ° C; The knife support 32 and the pin member 33 can be cooled.

Therefore, it is possible to prevent thermal deformation of the now-removal knife 31, the knife support 32, and the pin member 33 generated by the heat transferred from the high temperature current 8.

In this embodiment, the cooling fluid used nitrogen to prevent overcooling.

However, the cooling fluid is not limited to nitrogen and may be any one as long as it can cool the removal means 30 now.

On the other hand, the cooling fluid supply pipe 42 is provided in the apparatus body 20 adjacent to the now removing knife 31 so that the cooling fluid is injected into the now removing knife 31 through the injection nozzle 43.

In addition, one or more cooling fluid supply pipes 42 including one or more injection nozzles 43 are provided in the apparatus body 20 adjacent to the knife support 32 so that the cooling fluid is injected to the knife support 32.

In addition, the cooling fluid supply pipe 42 is provided with one or more injection nozzles 43 so that the cooling fluid is injected to the fin member 33 is further provided in the apparatus body 20 adjacent to the fin member 33.

That is, three cooling fluid supply pipes 42 are provided in the apparatus body 20 to cool each of the now removing knife 31, the knife support 32, and the pin member 33 constituting the now removing means 30. It is.

However, the present invention is not limited thereto, but the cooling mechanism 31 may be provided in the apparatus body 20 so that only one of the knife 31, the knife support 32, or the pin member 33 is cooled. .

In addition, two cooling fluid supply pipes 42 may be provided in the apparatus body 20 to cool two of the knives 31, the knife support 32, or the pin member 33.

The position in the apparatus body 20 of each cooling fluid supply pipe 42 is not limited to this embodiment, Any position as long as it can cool the removal knife 31, the knife support 32, or the pin member 33 now is possible. It is possible to position.

An injection nozzle 43 for injecting a cooling fluid to cool the now removing knife 31 is provided in the apparatus body 20 adjacent to the now removing knife 31 such that the cooling fluid is injected obliquely over the now removing knife 31. It is formed in the cooling fluid supply pipe 42.

In addition, the injection nozzle 43 for injecting a cooling fluid to cool the knife support 32 is provided in the apparatus body 20 adjacent to the knife support 32 so that the cooling fluid is injected under the knife support 32. It is formed in the cooling fluid supply pipe 42.

And, the injection nozzle 43 for injecting the cooling fluid to cool the fin member 33 is provided in the apparatus body 20 adjacent to the fin member 33 so that the cooling fluid is injected under the fin member 33. It is formed in the cooling fluid supply pipe 42.

The position or number of injection nozzles 43 in the cooling fluid supply pipe 42 or the direction of injection thereof is not limited to the present embodiment, and is now removed through the cooling fluid injected through the injection nozzle 43. Any position, number, or injection direction may be used as long as the support 32 or the pin member 33 can be cooled smoothly or in the number or injection direction.

In this embodiment, the cooling fluid supply pipe 42 is branched from one cooling fluid supply 41.

However, each cooling fluid supply pipe 42 may be connected to a separate cooling fluid supply source 41 for supplying the same cooling fluid.

Further, each cooling fluid supply pipe 42 is a cooling fluid supply source for supplying a cooling fluid supply 41 for supplying a cooling fluid suitable for the cooling of each component constituting the removing means 30, that is, another kind of cooling fluid. It may be connected to the 41 respectively.

In addition, the two cooling fluid sources 41 may be connected to the cooling fluid supply source 41 supplying the other cooling fluid to the cooling fluid supply source 41 supplying the same cooling fluid.

In the present embodiment, the cooling fluid source 41 is provided in a steel mill or the like and uses a utility line distributed in each process.

However, the cooling fluid supply source 41 is not limited to this, and any type of cooling fluid supply source 41 can be provided as long as it can supply a cooling fluid such as an independent storage tank.

The cooling fluid supply pipe 42 is provided with a valve 44 as shown in FIGS. 4A and 5.

Therefore, the injection of the cooling fluid from the injection nozzle 43 can be controlled.

The tip of the now-removing knife 31 of the present embodiment, that is, the part where the now-removing knife 31 is in contact with the now 8 attached to the lance 2, is shown in FIG. 4B, as shown in FIG. 4B. It is provided.

This is preferable because it can prevent abrasion of the now removing knife 31 in contact with the now 8 attached to the lance 2.

As shown in FIG. 1, in the refining operation, the lance 2 is lowered through the lance hole 3 by the lance driving device 7 to be positioned inside the converter 1.

Thereafter, oxygen is blown into the molten steel included in the converter 1 through the lance 2 to perform the refining operation.

During the refining operation, the lance 2 is now attached to the lance 2 as shown in FIG.

The temperature of the now attached 8 is a high temperature of about 1600 ° C.

At the end of the refining operation or for other reasons, the lance 2 is lifted by the lance drive 7.

The jaws 8 attached to the lance 2 lifted by the lance drive device 7 come into contact with the now removing knives 31 provided in the device body 20 of the lance now removing device 10.

The now-removing knife 31 which touches now 8 is rotated counterclockwise by the force of raising the lance 2 and is connected to the now-removing knife 31 so that the hanger formed on the knife support 32 rotates together. The rotation is stopped when the locking jaw formed in the device body 20 is reached.

At this time, the now removing knife 31 acts on the now 8 to scrape down the now 8 attached to the lance 2.

The jaws 8 attached to the lance 2 are at a high temperature of about 1600 ° C., and thus the now removing means 30, i.e., the now removing knives 31 and the knife support 32, from the high-temperature brazing 8 during the above operation. Heat is transferred to the pin member 33.

The cooling fluid source 41, that is, the cooling fluid supplied from the utility line provided in the steel mill, in this embodiment, nitrogen flows to the valve 44.

Opening the valve 44 while removing the now 8 attached to the lance 2 by the now removing knife 31 as described above causes the cooling fluid to be supplied to each cooling fluid supply pipe 42 provided in the device body 20. Phosphorus nitrogen will flow.

Nitrogen, which is a cooling fluid flowing into each cooling fluid supply pipe 42, is removed from the now removing knife 31, the knife support 32, and the pin member 33 constituting the now removing means 30 through the injection nozzle 43 formed thereon. Sprayed).

The now-removal knife 31, the knife support 32, and the pin member 33 heated by the heat transferred from the hot lance 8 attached to the lance 2 are cooled due to the injection of nitrogen, which is a cooling fluid.

Therefore, heat deformation can be prevented from occurring in the now removing knife 31, the knife support 32, and the pin member 33 constituting the removing means 30 now.

As a result, it is possible to prevent the wear and tear of the now-removing knife 31 and the knife support 32 from deteriorating due to the deterioration in strength and hardness due to thermal deformation.

In addition, it is possible to prevent the pin member 33, which should be broken when excessive force is applied, from being bent without breaking due to thermal deformation, thereby preventing the rise of the lance 2 from being hindered.

As described above, the wear of the now removing knife 31 is not only prevented by cooling by the cooling fluid injected from the spray nozzle 43, but also the wear preventing tip 50 provided in the now removing knife 31. This can also be prevented.

As described above, although the present invention has been described by way of limited embodiments and drawings, the present invention is not limited thereto, and the technical concept of the present invention will be described by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

1 is a view showing blowing oxygen into the converter through the lance.

2 is a view showing a conventional lance now removing device.

3 is a view showing the removal of the now attached to the lance using a conventional lance now removing device.

Figure 4a is a perspective view of one embodiment of a lance now removing device according to the present invention.

4B is a cross-sectional perspective view of one embodiment of a lance now removing device in accordance with the present invention.

Figure 5 is a view showing the cooling means of the lance now removing device according to the present invention.

           Explanation of symbols on the main parts of the drawings

1: converter 2: lance

3: lance ball 4: guide bogie

5: guide beam 6: wire rope

7: lance drive 8: now

10, 100: lance now removing device 20, 200: device body

21, 210: guide 30, 300: removal means now

31, 310: Remove knives now 32, 320: Knife support

33, 330: fin member 40: cooling means

41: cooling fluid supply source 42: cooling fluid supply pipe

43: injection nozzle 44: valve

50: wear protection tip

Claims (7)

An apparatus body 20 disposed above the converter 1 and through which the lance 2 passes; Now removing means (30) provided in the device body 20 to remove the now attached to the lance (2); And Cooling means 40 provided in the apparatus body 20 to cool the now removing means 30; Configured now including the lance removal device. The method of claim 1, wherein the now removing means (30) A now removing knife 31 rotatably connected to the device body 20; A knife support 32 connected to one side of the now removing knife 31 and rotatably connected to the apparatus body 20 together with the removing now knife 31; And A pin member 33 for rotatably connecting the now removing knife 31 and the knife support 32 to the apparatus body 20; Lance now removing device comprising a. The method of claim 1, wherein the cooling means 40 A cooling fluid supply pipe 42 connected to the cooling fluid supply source 41 and supplied with a cooling fluid; And At least one injection nozzle (43) provided in the cooling fluid supply pipe (42) for injecting a cooling fluid toward the now removing means (30); Lance now removing device comprising a. The apparatus body (20) of claim 3, wherein the cooling fluid supply pipe (42) is such that the cooling fluid is injected into the now removing knife (31) included in the now removing means (30) through the injection nozzle (43). Lance now removing device, characterized in that provided in. According to claim 4, The cooling fluid supply pipe 42 is provided with one or more injection nozzles 43 so that the cooling fluid is injected to the knife support 32 included in the now removing means 30 is the device body 20 The lance now removing device, characterized in that is provided with one more. The cooling fluid supply pipe (42) according to claim 4 or 5, wherein the cooling fluid supply pipe (42) is provided with one or more injection nozzles (43) so that the cooling fluid is injected into the pin member (33) included in the now removing means (30). Lance now removing device, characterized in that the body is provided with one more. 3. The lance now removing device according to claim 2, wherein the now removing knife (31) is provided with an anti-wear tip (50).

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