KR20160113756A - Electrode cleaning device for electric arc furnace - Google Patents

Electrode cleaning device for electric arc furnace Download PDF

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Publication number
KR20160113756A
KR20160113756A KR1020150039791A KR20150039791A KR20160113756A KR 20160113756 A KR20160113756 A KR 20160113756A KR 1020150039791 A KR1020150039791 A KR 1020150039791A KR 20150039791 A KR20150039791 A KR 20150039791A KR 20160113756 A KR20160113756 A KR 20160113756A
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KR
South Korea
Prior art keywords
electrode
cleaning
head
cleaning gas
injection head
Prior art date
Application number
KR1020150039791A
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Korean (ko)
Inventor
류재왕
Original Assignee
주식회사 포스코
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Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020150039791A priority Critical patent/KR20160113756A/en
Publication of KR20160113756A publication Critical patent/KR20160113756A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B08B5/023—Cleaning travelling work
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Details (AREA)

Abstract

Disclosed is an electrode cleaning apparatus for an electric furnace. An apparatus for cleaning an electrode in an electric furnace according to an embodiment of the present invention includes a spray head for spraying a cleaning element onto a surface of an electrode coupled to an electrode holder; A supply device for supplying a high-pressure cleaning element to the injection head; And a moving device for moving the spray head for cleaning of the electrode.

Description

[0001] The present invention relates to an electrode cleaning apparatus for an electric arc furnace,

The present invention relates to an electrode cleaning apparatus for an electric furnace, which can remove foreign matter on the surface of an electrode to realize good bonding between the electrode and the electrode holder.

The electric furnace has three electrodes (three-phase electrodes) for melting a scram charged in a furnace in such a manner as to supply an electric current to generate an arc.

As the dissolution of the scrap proceeds, the electrodes of the electric furnace are gradually shortened in length due to oxidation, sublimation, cutting, and the like. Therefore, the electric furnace changes the joining position of the electrode holder for supporting the electrode to adjust the length of the electrode entering the heating furnace after proceeding to some extent.

When changing the position of the electrode and the electrode holder, it is necessary to clean the foreign substance such as dust adhering to the electrode surface. In the electric furnace, many foreign substances such as dust and smoke are generated during the operation, and such foreign matter adheres to the surface of the electrode. When the position of the electrode holder is changed in the state where the foreign substance is attached to the surface of the electrode, The flow of the current can be inhibited and, in severe cases, the electrode pad can be damaged.

The foreign matter between the electrode holder and the electrode may cause poor contact to increase the resistance and cause fine arc between the electrode and the electrode pad, which may lead to damage of the electrode pad.

Conventionally, the worker moved up to the upper part of the electric furnace and cleaned the electrode to remove the foreign substances adhering to the surface of the electrode. However, since the electrode was cylindrical, the working condition was also poor. There was also a problem of stopping production when cleaning.

An embodiment of the present invention is to provide an electrode cleaning apparatus for an electric furnace which can remove foreign matters on the surface of an electrode to realize good coupling between the electrode and the electrode holder.

According to an aspect of the present invention, there is provided an electrode holder comprising: a spray head for spraying a cleaning element onto a surface of an electrode coupled to an electrode holder; A supply device for supplying a high-pressure cleaning element to the injection head; And a moving device for moving the injection head to clean the electrode.

The cleaning element may be a cleaning gas, and the jetting head may remove foreign matter by spraying the cleaning gas onto the electrode surface above the electrode holder.

The ejection head may have a ring shape having an inner diameter larger than an outer diameter of the electrode, and may include a plurality of ejection openings for ejecting a cleaning gas toward the surface of the electrode.

The moving device may elevate the ejection head so that the ejection head moves up and down in a state of being fitted to the outside of the electrode above the electrode holder.

The spray head may spray the cleaning gas injected from the plurality of ejection openings toward an electrode surface of the lower part of the ejection head in an inverted conical shape.

The electrode cleaning apparatus may be disposed at a position where the electrode moves when the cover of the electric furnace is opened.

The moving device comprising: a frame having a guide rail for guiding up and down; An elevating member installed to raise and lower along the guide rail; An elevation driving unit for elevating the elevation member; And a support arm extending from the elevating member and connected to the ejection head.

The moving device may further include an upper sensor and a lower sensor for sensing a rising position and a falling position of the elevating member, respectively, in order to limit an elevating range of the elevating member.

The supply device comprising: a supply source for supplying a high-pressure cleaning gas; A supply pipe connecting the supply source and the injection head; And a control valve for controlling the supply of the cleaning gas.

The electrode cleaning apparatus of the electric furnace according to the embodiment of the present invention can easily clean the surface of the electrode because the cleaning head is moved up and down to spray the cleaning element of high pressure to the electrode surface to clean the outer surface of the electrode. Accordingly, when the position of the electrode and the electrode holder is changed, good connection between the electrode and the electrode holder is realized, thereby preventing the contact failure between the electrode and the electrode holder.

In the electrode cleaning apparatus of the electric furnace according to the embodiment of the present invention, since the spray head moves up and down while spraying the cleaning gas in the form of an inverted cone toward the peripheral surface of the electrode, the foreign matter adhering to the surface of the electrode is removed as if it is swept down, Can be implemented.

Further, in the electrode cleaning apparatus of the electric furnace according to the embodiment of the present invention, since the cleaning gas injected in an inverted conical shape enters the gap between the electrode and the electrode holder when the injection head is close to the electrode holder, Etc.) can be smoothly removed.

Further, by using the electrode cleaning apparatus according to the embodiment of the present invention, since the operator can perform cleaning of the electrode without approaching the electrode, a safe working environment can be created, Since the electrode cleaning can be performed, it is not necessary to stop production to clean the electrode, so productivity can be increased.

1 shows an electric furnace to which an electrode cleaning apparatus according to an embodiment of the present invention is applied.
2 is a plan view showing the use state of the electrode cleaning apparatus according to the embodiment of the present invention.
3 is a plan view showing a detailed configuration of an electrode cleaning apparatus according to an embodiment of the present invention.
4 is a side view of an electrode cleaning apparatus according to an embodiment of the present invention.
5 is a perspective view illustrating an ejection head of an electrode cleaning apparatus according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view illustrating the shape of a jetting head and a jetting cleaning gas of an electrode cleaning apparatus according to an embodiment of the present invention.
7 shows a modified example of the ejection head of the electrode cleaning apparatus according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs, and the present invention is not limited thereto, but may be embodied in other forms. In order to clarify the present invention, it is possible to omit the parts of the drawings that are not related to the description, and the size of the components may be slightly exaggerated to facilitate understanding.

1 shows a state where an electrode cleaning apparatus according to an embodiment of the present invention is applied to an electric furnace. As shown in the figure, the electric furnace includes a heating furnace 10 in which scrap S is charged and melted, a cover 11 covering the upper portion of the heating furnace 10, And a plurality of electrodes (13) installed vertically so as to enter the inside.

Three electrodes 13 provided in the form of a round bar are used in the electric furnace since they supply three-phase (R, S, T) current. The electrodes 13 are supported by the electrode holder 14, 14, respectively.

The electric furnace can open the cover 11 covering the heating furnace 10 so as to further supply the scrap S to the inside of the heating furnace 10 during the operation as in the example of Fig. At this time, the plurality of electrodes 13 are separated from the heating furnace 10 together with the cover 11. The separated cover 11 and the electrode 13 move to the side of the heating furnace 10 so that the charging facility 15 containing the scrap S approaches the upper portion of the heating furnace 10, (S) can be dropped.

The electrode 13 of the electric furnace enters the inside of the heating furnace 10 and then contacts the scrap S as an object to be heated to supply an electric current to generate an arc between the scrap S and the lower end thereof, .

As the electrode 13 is used, the lower end portion which is in contact with the scrap S and causes an arc is consumed, and the length is shortened. The electrode 13 is charged by supplying the scrap S to the heating furnace 10 and adjusting the position where the electrode holder 14 clamps the electrode 13 every time the melting operation is performed, (Downward) into the heating furnace, and if necessary, the electrode 13 may be replaced or extended to the top.

1 and 2, the electrode cleaning apparatus 100 is configured such that the electrode 13 covers the cover 11 in a state in which the cover 11 is opened to charge the scrap S into the heating furnace 10, So that the electrode 13 can be cleaned by spraying the cleaning element on the surface of the electrode 13 coupled to the electrode holder 14. As a cleaning element, various elements such as a liquid component such as water or a cleaning agent and a gas component such as air can be used without affecting the corrosion of the electrode 13. Hereinafter, do.

2 to 4, the electrode cleaning apparatus 100 includes an injection head 110 for injecting a cleaning gas onto the surface of the electrode 13, a supply device 120 for supplying a high-pressure cleaning gas to the injection head 110, , And a moving device 140 for moving the injection head 110 for cleaning the electrode 13.

3 and 4, the moving device 140 includes a frame 141 on which a guide rail 141a for guiding up and down is installed on both sides and a lower end thereof is supported in a fixed state, An elevation driving unit 143 for elevating and lowering the elevation member 142 and an elevation driving unit 143 extending from the elevation member 142 toward the electrode 13 And a support arm 144 connected to the head 110.

The guide rails 141a are installed so as to be parallel to each other on both sides of the frame 141 and the elevating members 142 are connected to the two guide rails 141a via guide units 145 having a plurality of rollers . Therefore, the elevating member 142 can be moved up and down along the two guide rails 141a while being stably supported.

The lifting drive portion 143 may be a hydraulic cylinder installed at the lower portion of the lifting member 142 to move the lifting member 142 up and down. Here, the hydraulic cylinder is shown as an example, but the shape of the lifting driver 143 is not limited thereto. A rack-pinion type or chain-sprocket type driving means may be employed as the lifting drive portion 143. [

6, the injection head 110 has an inner diameter larger than the outer diameter of the electrode 13 so as to be fitted on the outer side of the electrode 13, and has a ring shape in which a flow path 111 through which the cleaning gas flows is formed . And a plurality of ejection openings 112 for ejecting a cleaning gas toward the surface of the electrode 13 on the lower side.

As shown in Figs. 3 and 4, the injection head 110 is fixed to an end portion of the support arm 144 extending laterally from the elevation member 142. Fig. Since three electrodes 13 are generally used in the electric furnace, three injection heads 110 are also provided so as to correspond to the positions of the electrodes 13, and each injection head 110 is separately provided from the elevating member 142 As shown in FIG. The injection head 110 can move up and down together with the elevating member 142 when the elevating driving unit 143 of the moving device 140 operates.

The positions of the respective injection heads 110 are arranged so as to coincide with the positions where the electrodes 13 are located in a state in which the cover 11 of the electric furnace is opened as shown in Fig. 4 by the operation of the elevation driving unit 143. The ejection head 110 is positioned at an upper position of the electrode holder 14 in a state of being fitted to the outside of the electrode 13 from the upper position of the electrode 13, . That is, the injection head 110 can be raised and lowered in such a manner as to be fitted to the outside of the electrode 13 on the upper portion (upper side) of the electrode holder 14 by the operation of the elevation driving portion 143. In this state, So that foreign matter adhering to the surface of the electrode 13 can be removed by injecting the cleaning gas.

4, the supply device 120 includes a supply source 121 for supplying a high-pressure cleaning gas, a supply pipe 122 for connecting the supply source 121 and each injection head 110, And a control valve 123 for controlling the control valve 123.

The supply source 121 may be composed of a compressor for compressing and supplying gas, a tank for storing a high-pressure compressed gas, a compressed gas supply line, and the like. As the cleaning gas, not only air but also inert gas such as nitrogen may be used.

4, the injection head 110 descends from the upper position of the electrode 13 and descends to the upper position of the electrode holder 14 adjacent to the electrode holder 14 and rises to the home position again, . Accordingly, the moving device 140 may include an upper sensor 146 and a lower sensor 147 for detecting the ascent and descent positions of the ascent and descent member 142 to control the ascent and descent ranges, respectively. This limits the excessive rise of the injection head 110 so that it is possible to quickly approach the electrode when cleaning is carried out and also to prevent excessive dropping of the electrode so that the injection head 110 collides with the electrode holder 14 .

6, the cleaning gas injected from each injection port 112 is directed toward the surface of the electrode 13 in the downward direction of the injection head 110, And is arranged to be sprayed in a conical shape. That is, each of the injection ports 112 is located on the lower side of the injection head 110, and the direction of each injection port 112 is slightly inclined so as to face the surface of the electrode 13.

The arrangement of the jetting ports 112 is such that the cleaning gas injected from each jetting port 112 forms an inverted cone surrounding the circumference of the electrode 13 so that when the jetting head 110 descends from the top of the electrode 13, The cleaning gas is removed as if the foreign substances adhering to the surface of the electrode 13 are swept down, thereby realizing a smooth cleaning. The cleaning gas injected in an inverted conical shape enters the gap between the electrode 13 and the electrode holder 14 and reaches the foreign material attached to the electrode pad 14a in a state where the injection head 110 is close to the electrode holder 14. [ So that it can be smoothly removed.

6, the injection port 112 may communicate with the outer surface of the injection head 110 through a hole and communicate with the inner surface of the injection port 112. Alternatively, the injection port 112 may extend outward from the injection head 210 by a predetermined length, And a guide tube portion 213 which forms a long injection hole 212. As shown in FIG.

Although the present embodiment shows a case where each injection head 110 is in the form of a ring, the shape of the injection head 110 is not limited thereto. Each injection head 110 may be in the form of a plurality of nozzles disposed in the form of surrounding the electrode 13.

1 and 2, the electrode cleaning apparatus 100 is disposed at a position where the electrode 13 is moved in a state where the cover 11 of the electric furnace is open, Cleaning of the electrode 13 is performed while filling the electrode S, but the installation position of the electrode cleaning apparatus 100 is not limited thereto. The electrode cleaning apparatus 100 may be disposed close to the heating furnace 10 so as to clean the outer surface of the working electrode 13. Alternatively, the electrode cleaning apparatus 100 itself can be implemented as a movable type and its position can be changed freely as needed.

Next, a method of cleaning the electrode using the electrode cleaning apparatus 100 and an operation of adjusting the position where the electrode holder clamps the electrode after cleaning the electrode will be described.

Cleaning of the electrode 13 by the electrode cleaning apparatus 100 can be performed while filling the scrap S in the heating furnace 10 during the operation as shown in Fig. The electrode 13 is moved to the lower part of the injection head 110 of the electrode cleaning apparatus 100 together with the cover 11 and kept stationary, 13 can be cleaned after the movement of the electrode 13 is completed.

The electrode cleaning apparatus 100 descends the elevation member 142 by the operation of the elevation driving unit 143 so that the ejection head 110 waiting on the electrode 13 is moved to the electrode 13, It can be lowered without interfering with the electrode 13 in a form to be fitted on the outside of the electrode 13. When the injection head 110 is lowered, cleaning gas in the form of an inverted cone is sprayed from the injection head 110 to the surface of the electrode 13 as shown in FIGS. 5 and 6, It is possible to remove the foreign matter. Of course, such a cleaning operation can be performed again while the jetting head 11 is lifted to cleanly remove foreign matter on the surface of the electrode 13. [

In particular, since the injection head 110 is provided in the form of a ring to uniformly spray the cleaning gas around the electrode 13, it is possible to smoothly clean the electrode 13 despite the cylindrical shape.

6, the high-pressure cleaning gas injected in an inverted conical shape enters the gap between the electrode holder 14 and the electrode 13 in the situation where the jetting head 110 is close to the electrode holder 14, Foreign substances existing in the clamping portion (electrode pad or the like) of the holder 14 can be removed.

After the electrode 13 is cleaned, the electrode holder 14 adjusts the position at which the electrode 13 is clamped. That is, the electrode holder 14 clamps the electrode 13 again while the electrode 13 is moved downward by the consumed length. In this process, since the surface of the electrode 13 to be clamped by the electrode holder 14 is already cleanly cleaned, the contact failure between the electrode holder 14 and the electrode 13 can be prevented. Therefore, it is possible to prevent the electrode pad 14a from being damaged.

In addition, by using the electrode cleaning apparatus 100 of the present embodiment, the operator can perform cleaning of the electrode 13 without approaching the electrode 13, thereby making it possible to create a safe working environment. In addition, since the cleaning of the electrode 13 can be performed quickly while the scrap S is charged into the heating furnace 10, the productivity can be improved since the production is not interrupted for cleaning the electrode 13.

10: heating furnace, 11: cover,
13: electrode, 14: electrode holder,
14a: electrode pad, 100: electrode cleaning device,
110: jetting head, 112: jetting port,
120: feeder, 140: mobile device,
141: frame, 141a: guide rail,
142: lifting member, 143: lifting and driving member,
144: Support arm.

Claims (8)

A spray head for spraying a cleaning element onto a surface of an electrode coupled to an electrode holder;
A supply device for supplying a high-pressure cleaning element to the injection head; And
And a moving device for moving the injection head to clean the electrode. The method according to claim 1,
Wherein the cleaning element is a cleaning gas,
Wherein the jet head ejects the cleaning gas to the surface of the electrode above the electrode holder to remove foreign matter. 3. The method of claim 2,
Wherein the ejection head has a ring shape having an inner diameter larger than an outer diameter of the electrode and has a plurality of ejection openings for ejecting a cleaning gas toward a surface of the electrode,
Wherein the moving device moves the injection head up and down so that the injection head moves up and down in a state of being fitted to the outside of the electrode above the electrode holder. The method of claim 3,
Wherein the jet head ejects a cleaning gas ejected from the plurality of ejection openings into an inverted conical shape toward the lower electrode side of the ejection head. The method according to claim 1,
Wherein the electrode cleaning device is disposed at a position where the electrode moves when the cover of the electric furnace is open. 6. The method according to any one of claims 1 to 5,
The mobile device
A frame having a guide rail for guiding the elevation;
An elevating member installed to raise and lower along the guide rail;
An elevation driving unit for elevating the elevation member; And
And a support arm extending from the elevating member and connected to the ejection head. The method according to claim 6,
Wherein the moving device further comprises an upper sensor and a lower sensor for sensing a rising position and a falling position of the elevating member to limit the elevating range of the elevating member, respectively. 6. The method according to any one of claims 2 to 5,
The feeding device
A supply source for supplying a high-pressure cleaning gas;
A supply pipe connecting the supply source and the injection head; And
And a control valve for controlling supply of the cleaning gas.
KR1020150039791A 2015-03-23 2015-03-23 Electrode cleaning device for electric arc furnace KR20160113756A (en)

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KR1020150039791A KR20160113756A (en) 2015-03-23 2015-03-23 Electrode cleaning device for electric arc furnace

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Application Number Priority Date Filing Date Title
KR1020150039791A KR20160113756A (en) 2015-03-23 2015-03-23 Electrode cleaning device for electric arc furnace

Publications (1)

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KR20160113756A true KR20160113756A (en) 2016-10-04

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114909918A (en) * 2022-05-24 2022-08-16 湖南维尚科技有限公司 Sintering furnace electrode assembly and cleaning method thereof
CN115837379A (en) * 2021-10-29 2023-03-24 宁德时代新能源科技股份有限公司 Electrode assembly cleaning device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115837379A (en) * 2021-10-29 2023-03-24 宁德时代新能源科技股份有限公司 Electrode assembly cleaning device
CN114909918A (en) * 2022-05-24 2022-08-16 湖南维尚科技有限公司 Sintering furnace electrode assembly and cleaning method thereof

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