KR20030048936A - An apparatus for removing reclained lump steel on blowing lance - Google Patents

Abstract

PURPOSE: An apparatus is provided which simply removes skull such as slag or inclusions generated during converter blowing stuck to the surface of converter blowing lance used during converter blowing in steelmaking plant of iron works. CONSTITUTION: In an apparatus(1) for removing skull(16) adhered to the surface of a converter blowing lance(20) ascended or descended through a circular dome(14) installed at gas collecting pipe at the upper side of converter to blow high purity high pressure oxygen into molten steel in the converter, the apparatus for removing skull on the converter blowing lance comprises a casing means connected to the upper side of the circular dome(14) so that the lance(20) passes through the casing means; a body of revolution(50) which is installed at the inner side of the casing means so that the body of revolution(50) is rotated by a driving means(40), and through which the lance(20) passes; and knife means(70) a plurality of which are horizontally projectingly installed on the inner coiling part(50a) of the body of revolution(50) so that the knife means(70) are integrally rotated along with the body of revolution(50) in a circumferential direction of the lance(20) to remove skull(16) stuck to the surface of the lance(20).

Description

AN APPARATUS FOR REMOVING RECLAINED LUMP STEEL ON BLOWING LANCE}

The present invention relates to a lance for scavenging lance (LANCE) for use in the converter blasting of the steelmaking plant of the steelworks, in particular, the implants generated when the converter is blown into the lance to inject oxygen into the molten steel in the converter, When the impurities such as impurities are fusion-bonded to the surface of the lance, the converter drilling lance can be easily removed as a knife that is rotated to the outside of the lance without the operator's manual work in the online state of the lance without the need to separate the lance from the facility. Now it's about the removal device.

As shown in FIG. 1, the lance 100 generally employed in a converter facility of a steel mill injects oxygen of high purity and high pressure into the molten steel inside the converter during the blowing operation of the converter and uses carbon in the molten iron initially charged. It is the main equipment of the steel mill to refine the molten iron to molten steel by refining, various impurities and slag generated during the converter blown is fused to the circular surface of the lance (100).

Accordingly, in order to remove the currents 110 attached to the lance 100 in the related art, the crane 100 is mounted in the vertical drive facility, that is, not shown in the drawing, but the vertical drive facility located in the upper portion of the converter is not shown in the drawing. After removing the lance (100) attached to the lance (100) using), and now attached to the lance (100) by hand using an oxygen cutter (130) in a state of being placed on the work bench (140). ) Is removed.

However, in such a conventional lance removal operation, as shown in FIG. 1, in order to remove the lance 100, the converter blowing operation is stopped and the lance 110 of the lance is removed. The operation of the converter blow operation by the line is stopped, and in particular, since the worker removes the current 110 of the lance 100 by hand, the working time is delayed, causing a disruption in the converter blow operation. Because of this, there is a high risk that a safety accident will occur.

In addition, since the installation and operation of a separate dust collector to prevent the gas dust and environmental pollution generated during the removal through the oxygen cutter 130, the equipment cost is increased, as well as the flame during operation of the oxygen cutter 130 There were several problems, such as the constant risk of fire.

The present invention has been made in order to improve the various problems of the prior art as described above, its purpose is to inject oxygen into the molten steel in the converter to carry out the drilling work of the converter, the inclusions, impurities, etc. When fused and adhered to the surface of the lance, the current removal device for the converter drilling lance can be easily removed as a knife that is rotated on the outside of the lance without the operator's manual operation in the online state of the lance without the need for detaching the lance from the facility. Is in providing.

Figure 1 is a schematic diagram showing the removal of the conventional converter blow lance now.

Figure 2 is a schematic diagram showing the installation position of the now removing device for the converter blow lance according to the invention

Figure 3 is a perspective view of the present invention lance now removing device

Figure 4 is a front configuration diagram showing the present inventors lance now removing device

Figure 5 is a perspective view of the drive unit in the present inventors device

Figure 6 is a perspective view of a multi-stage knife for removal now in the inventors device

7 is a main structural diagram showing the installation state of knives in the present inventors device;

Figure 8 is a perspective view of the casing in the inventor device

Explanation of symbols on the main parts of the drawings

1 .... lance now removal device 10 .... converter

12 ... gas collection tube

20 ... converter drill lances 22 ... now

30 .... Casing means 32, 34 .... Casing 1,2

36 .... Extension 40 .... Drive Gear

44 .... shaft 46 .... cylindrical gear

48 .... drive motor 50 .... rotating body

52 .... gear 54 .... support protrusion

56 .. Seat 58 .. Bearing

70 ... Knife means 72. Settlement groove

74 .... Screw groove 76 .... Information bolt

78 .... Jang Home 80 ... Knife Body

82 .... Knife

As a technical configuration for achieving the above object, the present invention is attached to the surface of the converter lance for blowing the high purity and high pressure oxygen into the molten steel in the converter by lifting up and down through the circular dome installed in the gas collecting pipe on the upper side of the converter. An apparatus for removing the present, comprising: a casing means connected to the lance through the circular dome;

A rotating body installed inside the casing means to rotate as a driving means and through which the lance passes; And,

A plurality of knife means installed to protrude horizontally in the inner peripheral portion of the rotating body to rotate in the circumferential direction of the lance integrally with the rotating body so as to closely remove the now attached to the surface of the lance; The present invention provides a device for removing the converter lance now, which is configured to remove the lance now.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Figure 2 is a schematic diagram showing the installation position of the now removing device for the converter blow lance according to the present invention, Figure 3 is a perspective view showing a lance now removing device of the present invention, Figure 4 shows a lance now removing device of the present invention. 5 is a perspective view showing a drive unit in the device of the present invention, FIG. 6 is a perspective view showing a knife of multiple stages for removal in the device of the present invention, and FIG. 7 is an installation state of knives in the device of the present invention. 8 is a perspective view illustrating a casing in the device of the present invention.

3 and 4 show the overall configuration of the present invention removal device 1 of the converter blow lance of the present inventor, the apparatus 1 of the present invention is largely the casing means 30 and the rotating body 50 and And, it can be divided into a knife means 70, described in more detail such components 30, 50, 70 as follows.

First, FIG. 2 shows an installation position of the apparatus 1 of the present invention. The apparatus 1 of the present invention is installed above the converter 10 in the converter drilling facility to collect gas generated when the converter is blown. Although not shown in the drawing, the lance 20 installed on the circular dome 14 installed on the gas collecting pipe 12 to be processed is connected to the crane and is moved along a vertical guide rail. The lance 20 is connected to the lower portion of the high-pressure high-pressure oxygen into the molten steel in the converter 10 as shown in FIG.

Next, FIGS. 3, 4 and 8 show the casing means 30 of the device 1 of the present invention. The casing means 30 of the present invention is located above the circular dome 14. The lance 10 is connected so as to pass through.

That is, as shown in Figs. 4 and 8, the casing means 30, the first casing 32 is bolted to the upper side of the circular dome 14 and the end portions are detachable to the upper side bolts thereof. It consists of a second casing 34 is fixed, the first and second casings 32, 34 is such that the central portion of the opening (32a) (34a) for passage through the lance, one side is integrally extended It is formed in ring shape with the extension part 36 in which the drive means 40 demonstrated below is arrange | positioned.

In addition, as shown in FIG. 8, the lava bar 32b is integrally provided in the opening 32a portion of the first casing 32, and is removed from the inside of the casing inside the rotating body 50. 22) is configured to prevent the insertion of debris.

Next, FIGS. 4, 6 and 7 show the rotating body 50 of the apparatus 1 of the present invention, the rotating body 50 having a driving means (inside the casing means 30). It is provided so as to rotate as 40, and it is comprised so that the said lance 20 may pass.

In this case, as shown in FIGS. 4 and 5, the driving means 40 for driving the rotating body 50 may include bearings disposed above and below the extension part 36 of the casings 32 and 34. A cylindrical gear 46 having the shaft portion 44 inserted into and supported by 42, and vertically mounted on an upper portion of the second casing 34, and coupled to the shaft portion 44 of the cylindrical gear 46 by a coupling 48a. It is equipped with a drive motor 48.

As shown in FIG. 5, the driving motor 48 is installed above the insertion groove 34b formed at one side of the second casing 34 to support the driving motor 48. Is mounted integrally.

On the other hand, as shown in Figure 6 and 7, the rotating body 50 is a motor 48 of the drive means 40 is engaged with the cylindrical gear 46 driven inside the casing means 30. It is formed of a ring rotating body having an outer winding portion 50a formed integrally with the gear portion 52 and an inner winding portion 50b formed integrally with an opening through which the lance 20 passes at a predetermined interval.

In addition, the support protrusions 54 formed on the upper and lower surfaces of the rotating body 50 and one side thereof have first and second seating portions 56a formed in the circumferential direction of the first and second casings 32 and 34. Supported by the first and second bearings 58a and 58b seated on the 56b, the motor 48 is installed to stably rotate in the casing means 30 when the motor 48 is driven.

Next, FIGS. 4, 6 and 7 show the knife means 70 of the device 1 of the present invention. The knife means 70 of the present invention is an inner winding portion of the rotating body 50. 50a) is provided so as to protrude horizontally and is integrally formed with the rotor 50 to rotate in the circumferential direction of the lance 20 so as to be in close contact with the claw 16 attached to the surface of the lance 20. .

That is, as shown in FIG. 6, the knife means 70 is divided into a knife body 80 largely inserted and supported by the rotating body 50 and a knife 82 which removes the actual lance baffle 22. I can't.

At this time, the knife body 80 is inserted into the seating groove 72 inclined in the longitudinal direction in the inner peripheral portion (50a) of the rotating body 50, the screw formed in the longitudinal direction of the rotating body (50) Long groove 78 is formed integrally in the longitudinal direction of the lower end of the guide bolt 76 is fastened to the groove 74, the seating groove 72 is the knife body 80 is inserted into the It should be formed so as to be inclined in the longitudinal direction at a predetermined interval from the inner winding portion (50a) of the rotating body (50).

On the other hand, the knife 82 is formed integrally with the distal end of the knife body 80 to rotate while removing the choke 22 attached to the lance 20, such a knife 82 is a rotating body 50 Is formed integrally with the body 80 on the opposite side of the rotation direction.

In addition, as shown in Figures 6 and 7, between the knife body 80 and the seating groove 72, the spring 84 for the buffer operation during the removal of the knife means 70 now elastically supported knife It is installed to cushion the contact shock when removing the lance now 22 by the means 70, the rear of the knife body 80 is made of a configuration that is formed integrally with the projection (80a) for supporting the spring (84) Lose.

Referring to the operation and effects of the present invention made of the above configuration in detail as follows.

As shown in Fig. 2 to Fig. 8, when the now 22 (22) in which the molten steel and the slag is fused to the surface of the high-purity high-pressure oxygen blowing lance 20 used in the converter blown occurs, the lance 20 The apparatus 1 for removing the converter blow lance of the present invention, which is removed from the facility and is removed automatically by the operator using an oxygen cutter or the like while being attached to the facility, is as follows.

First, although schematically illustrated in FIG. 2, a gas collecting tube 12 is installed above the converter 10 to collect gas generated when the converter is blown, and on the gas collecting tube 12, oxygen of high purity and high pressure is applied to the converter. Is installed on the circular dome 14 is passed through the lance 20 for blowing the lance 20, although not shown in the figure, the lance 20 vertically moving toward the lower side through the circular dome 14 is a crane The lance 20, which is connected to the lower side of the moving block moving up and down and moving along the vertical rail, is lifted up and down on the converter vertical to perform the converter drilling operation.

3 and 4, when oxygen is injected into the converter molten steel through the lance 20, the molten steel deposits and slag are splashed and solidified on the surface of the lance 20, and then solidified (22). The lance surface 22 of such a lance surface should be removed because it breaks the circular dome 14 or hinders smooth oxygen injection during lance movement.

At this time, the first casing 32 of the casing means 30 is bolted to the upper side of the circular dome 14, the second casing 34 to the upper side of the first casing 32 as a bolt on the outer side It is fixed, and a ring-shaped rotating body 50 is seated inside the casing means 30.

Therefore, as shown in FIGS. 3, 4, and 6, when the driving motor 48 of the driving means 40 installed vertically on the second casing 34 is rotated, the driving motor 48 is coupled with the driving motor 48. The cylindrical gear 46, which is connected to and is supported by the shaft portion 44 as a bearing 42 perpendicular to the interior of the first and second casings 32 and 34, is integrally driven to rotate.

As a result, the rotary body 50 is integrally rotated and driven inside the casing means 30 by the gear part 52 of the outer peripheral portion 50a of the rotary body 50 engaged with the cylindrical gear 46. Support protrusions 54 formed on the upper and lower surfaces of the rotating body 50 and one side thereof are first and second seating portions 56a and 56b formed in the circumferential direction of the first and second casings 32 and 34. Since it is supported by the first and second bearings 58a and 58b seated on the shaft, when the driving motor 48 is driven, the rotating body 50 is stably rotated and driven inside the casing means 30. .

Next, as shown in FIGS. 4, 6 and 7, the knife body (b) is formed in the seating grooves 72 formed in an inclined longitudinal direction in the inner winding portion 50a of the rotating body 50 and arranged at intervals of 90 degrees. After the 80 is inserted through the spring 84, the guide bolt 76 is fastened to the screw groove 74 formed in a predetermined depth in the longitudinal direction toward one side of the inner peripheral portion (50a) of the rotating body 50 is It is inserted and supported in the long groove 78 formed in the longitudinal direction on the knife body (80).

Therefore, as shown in Figs. 3 and 4, when the rotating body 50 rotates, a total of about 12 knives of the knife means 70 each of three in the longitudinal direction disposed on the inner winding part 50a. The inner winding portion 50a of the first and second casings 32 and 34, the circular dome 14, and the rotating body 50 integrally with the rotating body 50 that the body 80 rotates when the motor 48 is driven. The tip knives 82 of the knife body 80 are rotated along the outer circumferential surface of the lance 20 which is raised and lowered through the lance 20.

As a result, when now 22 is generated on the surface of the lance 20, the worker raises the lance 20 so that the now 22 portion is located inside the casing means 30, as shown in FIG. 4. As can be seen, if the knife 82 of the knife means 70 is removed while rotating the now 22, the lance 20 is gradually raised to remove all the now 20.

By the way, as shown in Figures 4 and 6, the length of the knife body (80) is preferably adjusted to efficiently remove the now (22), gradually from the outer surface of the now (22) toward the inside The knife body 80 at the lowermost side in the longitudinal direction of the rotating body 50 is shortest and the uppermost side is formed longest so as to be removed.

On the other hand, since the knife bodies 80 are inserted through the springs 84 in the seating grooves 72 of the rotating body 50 and are supported as guide bolts 76, the knife 82 is now (22). ) Is buffered so as not to damage the surface of the lance 20 at the time of contact thereof, and in particular, the length of the long groove 78 formed in the knife body 80 is important, and guides to the end of the long groove 78. The inner diameter region R formed by the uppermost knife body 80 is a lance so that the bolt 76 is caught and the knife 82 portion of the knife body 80 protrudes as much as possible but does not come into contact with the surface of the lance 20. It should be larger so that there is a slight tolerance than the diameter of 20).

Accordingly, the apparatus 1 of the present invention can be compared with the conventional worker taking the lance 20 out of the facility to remove the now 22 of the lance 20 and removing the now 22 through an oxygen cutter off-line. ), It is possible to effectively remove the surface 22 of the surface online without taking out the lance 20.

As described above, according to the present invention for removing the converter blow lance, various impurities, such as slag (SLAG), generated during the converter blown are fused to the surface of the lance and are now converted to the molten iron. It is not effective, and effectively prevents the circular dome of the blowholes from being broken when the lance moves upward after the blow.

Thus, by removing the surface now of the lance without the need for manual removal of the lance by using an oxygen cutter, the lance can be effectively removed from the online state of the lance, thereby preventing downtime of the converter scavenging work due to the removal of the lance. It is to provide an excellent effect of improving the productivity.

While the invention has been shown and described with respect to specific embodiments thereof, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit or scope of the invention as set forth in the claims below. I would like to know that those who have knowledge of this can easily know.

Claims (5)

(22) attached to the surface of the converter blow lance (20) for raising and lowering through the circular dome (14) installed in the gas collecting pipe (12) above the converter (10) to blow high purity and high pressure oxygen into the molten steel in the converter. In the device (1) for removing Casing means 30 is connected to the upper portion of the circular dome 14, the lance 10 is connected to; A rotating body 50 installed to rotate as the driving means 40 inside the casing means 30 and through which the lance 20 passes; And, Now installed in the inner peripheral portion (50a) of the rotating body 50 to be horizontally projected to rotate in the circumferential direction of the lance 20 integrally with the rotating body (50) attached to the surface of the lance (20) Knife means (70) for close removal of the 16; including the now lance removing device for the converter lance, characterized in that configured to remove the lance now without taking out the lance (20) 2. The casing means (30) according to claim 1, wherein the casing means (30) comprises a first casing (32) which is bolted to the upper side of the circular dome (14) and a second casing (34) which is bolted to be detachable thereon. Become, The first and second casings 32 and 34 are formed in a ring shape having a central portion of the opening 32a and 34a for passing the lance, and having an elongate portion 36 extending integrally on one side thereof. Removal device of converter blow lance According to claim 1, The drive means for driving the rotating body 50, A cylindrical gear 46 into which the shaft portion 44 is inserted and supported by bearings 42 provided above and below the extension portion 36 of the casing 32 and 34; And, A drive motor 48 mounted vertically on top of the second casing 34 and coupled to a shaft portion 44 of the cylindrical gear 46 and coupled to a coupling 48a; Removal device The method of claim 1, wherein the rotating body 50, Outer winding portion 50a having integrally formed gear portion 52 to which cylindrical gear 46 driven inside casing means 30 as motor 48 of drive means 40 is integrally formed, and the lance 20 ) Is composed of a ring rotating body having an inner winding portion 50b formed integrally with an opening through which a predetermined distance passes. Support protrusions 54 formed on the upper and lower surfaces of the rotating body 50 and one side thereof are first and second seating portions 56a and 56b formed in the circumferential direction of the first and second casings 32 and 34. ) Is now supported by the first and second bearings 58a and 58b seated on the shaft, and is configured to stably rotate and drive the inner side of the casing means 30 when the motor 48 is driven. Device The method of claim 1, wherein the knife means 70, Guide bolts inserted into the seating grooves 72 inclined in the longitudinal direction in the inner winding portion 50a of the rotating body 50 and fastened to the screw grooves 74 formed in the longitudinal direction of the rotating body 50 ( A knife body 80 in which a long groove 78 into which the lower end of the 76 is inserted and supported is integrally formed in the longitudinal direction; And, And a knife 82 formed integrally with the distal end of the knife body 80 to remove the tooth 22 attached to the lance 20. Between the knife body 80 and the seating groove 72 is now removing device of the converter blow lances, characterized in that the spring 84 for the buffer operation when the removal of the knife means 70 is elastically supported.