KR100880455B1 - Removable cover for a torpedo ladle car - Google Patents

Abstract

A removable cover for a metal mixer of a torpedo ladle car is provided to reduce costs for maintenance and repairing of the cover by partially separating and replacing the cover when a body of the cover is damaged. In a cover for covering a hot metal injection port of a metal mixer mounted on a torpedo ladle car transferring hot metal produced in a blast furnace, a removable cover for the metal mixer of the torpedo ladle car comprises a metal casing(21) and a refractory body(22). The metal casing is a downward open type metal casing in which a side plate(21B) extends in the downward direction from an edge part of a flat top plate(21A). The refractory body is consisted of an upper body(22A) and a lower body(22B). Top and side faces of the upper body are closely adhered to a bottom face of the top plate and an inner face of the side plate respectively. The lower body extends in the downward direction from a central part except an edge part of a bottom face of the upper body. The refractory body is separably assembled with the casing by bolts(B) and nuts(N). The lower body inserted into the metal mixer through the hot metal injection port has a planar cross-sectional area which gradually decreases as it goes from an upper part of the lower body to a lower part thereof.

Description

Removable cover for a torpedo ladle car}

The present invention relates to a cover for a torpedo ladle car mixing furnace, and more particularly, a mixing furnace mounted on a molten iron for moving molten iron, which is molten pig iron produced in a blast furnace, to a steelmaking process. Removably coupled to the molten iron inlet of the invention, and relates to a removable cover for a molten iron car crossroads to minimize the temperature drop of the molten iron before being put into the steelmaking process.

Steel is produced by the sequential steelmaking process and steelmaking process, which is a process of mixing iron ore, coke, limestone and the like in a blast furnace, also called a blast furnace, to obtain molten iron, molten iron. The steelmaking process adjusts the components of C, Si, Mn, P, S, etc. contained in the molten iron in the blast furnace, deoxidizes them, and adds and adjusts other necessary components to form molten steel with a composition suitable for the final purpose of use. As a process of obtaining, steel is made by casting molten steel.

In this case, the molten iron produced in the blast furnace is generally transferred to the molten iron and then transferred to the converter, which is a steelmaking facility, in which the molten iron may be desulfurized as a preliminary treatment for steelmaking. As described above, as both sides of the central portion having a constant cross-sectional area move away from the center portion, the cross-sectional area decreases to form a shape similar to the torpedo's outer shape, and the lower end portions of the molten iron storage portion 11. Is coupled to the side is configured to include a drive unit 12 and the like provided with a plurality of wheels moving on the rail.

In this case, the molten iron storage unit 11 is a 'crossroad track', the driving unit 12 provided on both sides of the crossroad track in order to move the crossroads is also referred to as a 'melting car', and the entire crossroads and the molten iron car is combined It is also referred to as a 'melting car', hereinafter, the molten iron storage unit 11 will be defined as a 'confusion road', the molten iron storage unit 11 and the entire driving unit 12 will be defined as a 'molten car'.

In addition to transporting molten iron, which is molten pig iron produced in the blast furnace, to the steelmaking process, the molten iron can also be used to slightly incline the crossroads to remove slag floating on the upper portion of the molten iron. The molten iron is injected into the main ladle in a state where the crossroads are tilted by about 130 °, and the molten iron remaining in the crossroads after the molten iron is injected into the ladle is discharged from the main captain and the secondary ship.

And the chartered car which completely emptied the chartered ship in the crossroads will move to the blast furnace side to receive new chartered ship and wait.

On the other hand, the temperature of the molten iron in the blast furnace is about 1500 ℃, when the temperature reaches about 1350 ℃ when the steelmaking process arrives, such a temperature drop phenomenon of the molten iron is formed in the upper center of the molten iron vehicle crossroads It is mainly due to the molten iron inlet.

That is, the round or elliptical molten iron inlet provided on the center of the crossroads is always open, the temperature of the molten iron is lowered because the heat of the molten iron is released to the outside of the crossroads through the molten iron inlet.

And the molten iron is not immediately processed in the steelmaking process, but is usually poured into the ladle after waiting for about 3 hours, so the temperature of the molten iron is further lowered. The higher the molten iron in steelmaking, the more scrap can be administered during the drilling operation. Since more molten iron can be secured during the steelmaking process, there is an advantage of increasing productivity.

However, when the temperature of molten iron is low, it is difficult to expand the molten iron due to less dose of scrap, and in order to maintain the temperature of the molten iron during the steelmaking operation, more oxygen should be added to reduce the productivity. Will cause an increase.

In addition, as the molten iron temperature of the crosstalk is lowered, the amount of current attached to the molten iron inlet in the process of pouring molten iron in the steel ladle, the main captain, the exhausting place, etc. may increase, which may cause an operation problem.

Furthermore, the crossroads are inclined 360 ° to the left and right to remove all the molten iron remaining inside the exhaust operation, and the outside temperature of the crossroads is very high, around 600 ° C. The installation of the retractable cover including the structure is almost impossible, and even if the installation is very durable due to high temperature, vibration and the like.

The present invention was devised to solve all the problems of the conventional molten iron for use of the molten iron vehicle without a cover for opening and closing the molten iron, and using a wire, a lifting magnet, a C-Hook, a crane or a hoist, etc. As it is possible to easily open and close the molten iron inlet of the crossroad, and the center of the bottom surface extending to the inner side of the crosslinking furnace has an object of the present invention to minimize the heat loss of the molten iron injected into the crossroad.

In addition, if the refractory constituting the body is damaged during the removal of the cover, it is possible to partially replace it, as well as allowing the charter driver to detach the cover directly to the molten iron inlet of the chartered vehicle crossroad, thereby maintaining the cover. Another object of the present invention is to reduce maintenance and operating costs.

The above object of the present invention is to provide flattening of the upper surface of the cover, a "tt" shaped cross-sectional structure having a thicker central portion than the edge portion, a wedge-shaped structure in which the cross-sectional area of the central portion gradually decreases from the upper portion to the lower portion of the central portion, and A multistage stackable coupling structure of replaceable bodies, a hoist with a wireless monitoring device, and the like.

The detachable cover for a molten iron truck of the present invention has a flat top surface and a plate-shaped ring member having a lifting lug and a downwardly open "c" shaped cross section, so that not only wire but also lifting magnet or sea hook can be used. It is easily detachable, and because it is a wedge-shaped structure in which the cross-sectional area of the lower body protruding from the center of the bottom of the cover decreases from the upper end to the lower end, it can be easily inserted and combined into the crossroads of the chartered car through the molten iron inlet. There is an advantage.

In addition, even when the molten iron is tilted by the protruding lower body, the cover can maintain a stable coupling state to the molten iron inlet of the molten iron, and the contact between the molten iron and the cover is improved by the now groove and the heat loss of the molten iron is improved. It is possible to minimize the maintenance cost is reduced because partial removal and replacement is possible when the body is damaged.

In addition, the removable cover for a molten iron truck of the present invention has the advantage that the charter driver can detach the cover directly to the molten iron inlet of the crossroad furnace, so that a separate operator for the removal of the cover does not need to be supplemented. have.

Detachable cover for a molten iron truck crossroad of the present invention, for opening and closing the molten iron injection port provided in the upper center of the crossroads, the bottom edge is in close contact with the upper end surface of the side wall around the molten iron inlet, the center portion projecting downward into the crossroad As the structure to be inserted, the protruding height of the center portion is similar to the thickness of the inner wall of the crossroads.

That is, when the molten iron injection port of the crossroads is covered as the detachable cover of the present invention, the bottom surface of the central portion protruding downward is located at almost the same height as the ceiling surface inside the crossroads.

As described above, the removable cover of the present invention, in which the central portion of the cover is inserted into the crosstalk in the state of being stacked on the upper surface of the molten iron inlet sidewall of the molten iron truck crossroad, has a plurality of annular lifting lugs for hooking wires on the upper surface thereof. a casing provided with lug); The casing is bolted to the casing in close contact with the inner surface of the casing, and the body is formed to protrude downward from the center portion so that the thickness of the center portion is thicker than the edge portion.

The casing, which serves as an outer shell, has a structure in which the side plates extend downward in the vertical direction along the outer periphery of the upper plate. In this case, in order to be able to use a lifting magnet that uses the force of the magnet, such as carbon steel, etc. It is preferred to be made of ferromagnetic metal.

In addition, a plurality of lifting lugs are coupled to the upper edge of the upper plate to hang wires, and a plurality of coupling holes are provided to couple the body using fixing members such as bolts and nuts. Or the lifting magnet may lift or lower the cover of the present invention.

The body, which serves as a practical lid for opening and closing the molten iron inlet of the cross-conductor, is made of a refractory casta, and has through holes penetrating from the bottom to the upper surface in the same number as the coupling holes of the casing, and the upper part is in close contact with the inner surface of the casing. It is coupled to the casing by the through hole and the casing and the coupling member matched with each other in the state.

The body has a thicker central portion than the rim, and the central portion has a wedge-shaped structure in which the cross-sectional area decreases from the top to the bottom, and the thickest center portion in the cover is inserted into the crossroad through the molten iron inlet of the crossroad. Even if the crossroads are tilted, the state of covering the molten iron inlet without falling from the outer surface of the crossroads by sliding is maintained stably.

In order for the charter driver to easily detach the cover of the present invention configured as described above, the hoist provided with the cover and the monitoring device may be configured together.

In this case, the chartered car is operated as a blast furnace, steel mill, main shipyard, and a distribution site. The hoist is installed in a number of places where the chartered car is operated without being directly coupled to the chartered car. The cover is removed directly by monitoring the movement of the cover and hoist, which is covered by the molten iron inlet of the crossroads.

Details of the effects and the resulting effects, including the object and technical configuration of the present invention will be clearly understood by the following description with reference to the drawings showing a preferred embodiment of the present invention.

Figure 2 is a perspective view of a removable cover for an embodiment of the present invention molten iron wheel crossroads, Figure 3 is a cross-sectional view.

As shown in the removable cover for the molten iron truck of the present invention,

A lower open casing 21 comprising a top plate 21A provided with a plurality of lifting lugs L for hanging wires on a flat upper edge portion, and a side plate 21B extending downward from an edge portion of the top plate 21A; ;

The lower body extending downward from the center except for the upper body 22A and the lower surface of the upper body 22A, the upper surface and the side of the upper surface 21A of the casing 21 and the inner surface of the side plate 21B are in close contact with each other. It is made of a body 22B, it is composed of a body 22 and the like coupled to the casing top plate 21A by a bolt (B) / nut (N).

At this time, in order to couple the casing 21 and the body 22 to fixing members such as bolts (B) / nuts (N), a plurality of coupling holes (H1) are formed through the casing upper plate (21A), and the body (22) ) Is provided with a through hole H2 penetrating from its bottom to its top surface.

And the upper and the lower body (22A) forming the body 22 (22B), but may be made of a body, the body 22 separating the upper and the lower body (22A) (22B) to allow for partial replacement when damage It is also good to manufacture, and the lower body (22B) to be separated separately can be produced by separating the upper and lower stages 2 to 4 or more stages, but may also be separated and manufactured in five or more stages, but in that case the rigidity of each stage is insufficient to remove the cover It may be easily damaged by the shock that may occur.

In addition, when the body 22 is separated into multiple stages as described above, and then coupled to the casing 21, it is preferable to laminate the mortar (M) coated between the separately manufactured partial bodies, and the casing as a fixing member ( 21) and the body 22 is applied to the fixing member coupling portion of the bottom of the lower body (22B) facing the molten iron inside the crossroads to apply a refractory such as castable (C) so that the fixing member is not exposed to the outside It is desirable to.

The detachable cover of the present invention configured as described above is used in a cross-conducting furnace filled with a molten iron of 1000 ° C. or higher. The casing 21 is made of a metal having excellent rigidity, and the body 22 directly facing hot molten iron is a heat-resistant caster. It is desirable to make a blow.

In particular, in the case of the casing 21, it is more preferable to make the ferromagnetic metal and at least the center portion of the upper surface of the top plate 21A to be flat, which is to remove the cover of the present invention even by the force of magnetic force by using a lifting magnet. To do that.

In addition, in the plan view, the inner circumferential surface of the molten iron injection hole is generally formed in a geometric shape having a curvature such as a circle or an elliptical shape in a plan view. The flat cross-sectional shape of the body 22 and the top plate 21A of the casing 21 are molten iron. It is preferable to be made in the same shape as the inlet.

And in the case of the lower body (22B) of the body 22 is inserted into the crossroad through the molten iron injection port, the side of the lower body (22B) is in close contact with the inside of the crossroad, or formed as small as possible a gap with the inside of the crossroad Although it helps to minimize the temperature drop of the molten iron, in such a case, the detachment operation of the cover using the lifting device can be very difficult.

Therefore, it is preferable that the flat cross-sectional area of the lower body 22B is smaller than the flat cross-sectional area of the molten iron inlet, and that the flat cross-sectional area of the lower body 22B gradually decreases from top to bottom in order to facilitate the detachable work of the cover. .

That is, when the flat cross-sectional area of the upper end of the lower body 22B is not larger than the flat cross-sectional area of the molten iron inlet but is substantially the same, the flat cross-sectional area decreases toward the lower side, so that when the cover is coupled to the molten iron inlet, Even if the centers do not coincide with each other, the cover can be easily coupled because the lower end portion of the lower body 22B having a small cross-sectional area can be easily inserted into a molten iron injection hole having a relatively flat area.

And, as shown in Figure 4, the cross-talk line 40 mounted on the molten iron car is poured to the molten steel 41 in the steel ladle or the like in the state rotated to one side in the width direction, the side wall of the injection hole (H) (W) The upper surface of the upper body of the cover is left on both sides opposite to each other and the molten iron is solidified (M '), and as a result, when the cover is joined to the molten iron inlet, The heat loss of the molten iron 41 is increased while the bottom surface 22A and the upper surface of the molten iron injection hole sidewall W do not come into close contact with each other.

Thus, as shown in Figure 5, to form the now groove (G) into which the current (M ') can enter the upper end of the lower body 22B in contact with both sides of the lower surface of the cover upper body 22A It is good.

That is, since the now (M ') is inserted into the now groove (G), the upper surface of the molten iron injection hole side wall (W) that does not remain now is in close contact with the bottom surface of the upper body (22A) of the cover to reduce the heat loss of the molten iron It becomes possible.

In addition, when the body 22 is manufactured in multiple stages, it may be difficult to center the separated body parts when the laminates are combined. As shown in FIG. 6, the upper end of the upper surface of the casing 21 is shown in FIG. 6. It is also preferable to have a rod or bar-shaped central member 23 extending downward to the center portion directly above the bottom of the body 22 in a state in which the lower end is separable from the body 22 at the center of the upper surface of the body 22 while being fixedly coupled to the central portion. Do.

For example, coupling the casing top plate central member 23 which is vertically extended downward at the bottom surface central portion, and a lower body (22 B), the upper and the up and down the first lower body (22, B1) and a second lower body (22 laminated B2), the central body of the upper body ( 22 A) and the first lower body ( 22 B1) is formed through the through hole (H3) through which the central member 23 can pass, and the second lower body ( 22) The upper center of the upper surface of the B2) is provided with an upwardly open coupling groove G 'into which the lower end of the central member 23 is inserted, so that the assembled body 22 and the casing 21 can be assembled and assembled easily and accurately. .

And, as shown in Figure 7, if you want to open and close the removable cover of the deceased viewed with a crane, the "ㄷ" shaped sea hook (C ') relatively wider than the thickness of the crane or hoist (not shown) A plate-shaped ring having a "c" shaped cross section of a downwardly open type having a flat upper surface on the front view, in the center of the casing upper plate 21A of the cover so that the cover can be opened and closed using this sea hook C '. It is also desirable to join the member 24 .

At this time, the ring member 24 having a flat plate-shaped “c” shape is to prevent the cover from tilting when the cover is detached, and also to use a lifting magnet when necessary. In order to be able to use the ring member 24 is also preferably made of a ferromagnetic metal.

In order to allow the chartered car driver to directly detach the molten iron inlet of the crossroads, the cover of the present invention configured as described above requires a monitoring device using a hoist, a CCTV, etc. capable of remote control.

For example, the charter car is injected with molten iron from the blast furnace, and then the molten iron is discharged from the steelmaking plant, the main shipyard, and the exhaust plant, and then the molten iron is injected into the blast furnace. By installing a hoist equipped with a monitoring device at the place where the molten metal is discharged from the furnace, the charter driver can directly remove the cover while checking the molten iron inlet of the crossover line through the monitoring device without a separate operator.

That is, as shown in Figure 8, the place where the charter car stops to inject the molten iron into the blast furnace, such as steel works, steel mills, shipyards, yards, etc. or to discharge the molten iron injected into the crossroads to the outside The hoist stand 81 and the hoist 82 operated by the hoist stand 81 are installed around the adjacent railroad R, and the movement of the hoist 82 and the cover of the present invention is captured and the video signal is transmitted. The easy-to-car driver easily sees a monitor 84 for displaying an image signal transmitted from the C-camera 83 by installing the C-camera 83 to the hoist stand 81 or the hoist 82. The hoist stand 81 can be installed on one side or around it.

Then, the molten iron is stopped in the hoist stand 81 installed in front of the place where the molten iron is injected into the crossroads or the molten irons in the crossroads are discharged to the outside, and the sea hook C coupled to the hoist 82 is observed while looking at the monitor 84. The removable cover of the present invention can be attached to the molten iron inlet of the cross-flow furnace as') or a lifting magnet.

At this time, the hoist is directly controlled by the charter vehicle driver using a remote controller. The remote controller is preferable to a safety accident prevention rather than a wire type.

As described above, the detaching method of the cover using the hoist,

Stopping the chartered car in the hoist stand;

Coupling sea hooks or lifting magnetics coupled to the hoist to the cover while monitoring the vicinity of the molten iron inlet of the hoist and the molten iron car crossroad using the CCT;

Lifting the cover;

Moving the molten iron out of the hoist stand to receive molten iron in the crossroad or discharge the molten iron inside the crossroad;

Rearranging the molten iron in the hoist stand after the molten iron is injected or discharged;

Moving the cover coupled to the sea hook or lifting magnet of the hoist to the molten iron inlet while monitoring the vicinity of the molten iron inlet of the molten iron vehicle crossroad using the CCT;

Covering a cover at a molten iron inlet of the molten iron difference mixing line;

The cover is made of a sequential process, such as the step of separating the hoist sea hook or lifting magnetic.

At this time, the movement trajectory of the chartered car that runs on the track like a train, in particular, the position of the chartered car in the track width direction is always constant on the track, so that the hoist moves only in the front and rear directions of the chartered car, and the width of the chartered car It is desirable not to be able to move in the direction.

That is, when the hoist can be moved not only in the longitudinal direction of the molten iron wheel but also in the width direction of the molten iron car, it may be more difficult to adjust the hoist to the cross-flow molten iron inlet.

And when the chartered car stops at a certain place in the hoist stand, the molten iron inlet of the crossroad line is always located at the same place, so that the cover can be easily removed even if the hoist is adjusted only in the longitudinal direction of the chartered car.

In addition, when the chartered car stops at a specific position within the hoist stand, the hoist stand that can be easily reached by the chartered car driver is equipped with a remote controller for hoist adjustment, while the chartered car driver can easily view the hoist and cover when the hoist is adjusted. It is desirable to install it.

However, by equipping the chartered engine room with an integrated remote controller for hoist adjustment that can adjust all of the installed hoists and an integrated monitor capable of receiving and displaying video signals from the CSI camera installed in multiple locations, the integrated remote controller for hoist adjustment and the monitor You can also minimize the number.

And the hoist adjustment remote controller can be provided in each hoist stand individually, but an integrated monitor can also be installed in a chartered engine room, etc. Various configurations are possible as needed.

It works in steel mills with blast furnaces and steel making facilities and can be directly applied with hoists to conventional general charter vehicles without a cover.

1 is a side view of a conventional chartered vehicle.

Figure 2 is a perspective view of the cover of the first embodiment of the present invention.

Figure 3 is a cross-sectional view of the cover of the first embodiment of the present invention.

Figure 4 shows the present forming position of the molten iron inlet of the conventional molten iron,

  (A) is the cross section of the chartered car,

  (B) is the partial flat height of charter car.

Figure 5 shows the cover of the second embodiment of the present invention,

  (A) is a section,

  (B) is bottom view.

6 is a cross-sectional view of the cover of the third embodiment of the present invention.

7 is a perspective view of a cover of a fourth embodiment of the present invention;

8 is a perspective view of a detachment device additionally configured for the cover to detach the cover;

          ((Explanation of symbols for main part of drawing))

      21. Casing 21A. Top plate 21B. shroud

      22. Body 22A. Upper Body 22B. Lower body

24. Ring member 40. Cross-flow line 41. Charter

81.Hoist Stand 82.Hoist 83.CSI Camera

      84. Monitor

      B. Bolt C. Castable C '. Sea hook

      G. Now groove G'.Joining groove H. Inlet

      H1. Union hole H2. Through hole H3. Through

      L. Lug M. Mortar N. Nut

      M '. Now R. Railway Tracks W. Sidewalls

Claims (8)

In the cover that covers the molten iron inlet of the cross-construction furnace mounted on the molten iron for transporting molten iron produced in the blast furnace, A downwardly open metal casing 21 in which the side plate 21B extends downward from the edge of the flat upper plate 21A; An upper body 22A having an upper surface and side surfaces in close contact with inner surfaces of the upper plate 21A and the inner surface of the side plate 21B of the casing 21, and a lower body extending downward from the center except for the bottom edge of the upper body 22A. 22B), comprising a refractory body 22 detachably coupled to the casing 21 by bolts B / nuts N, Removable cover for a molten iron truck crossroads characterized in that the flat cross-sectional area of the lower body (22B) is inserted into the crossroads through the molten iron injection port gradually decreases from the top to the bottom. The hoist stand (81) according to claim 1, further comprising: a hoist stand (81) installed around the railway tracks adjacent to each place for injecting molten iron into the crossroad or injecting molten iron injected into the crossroad; A hoist 82 coupled to the hoist stand 81 and detaching the metal casing 21 to which the body 22 is coupled to the molten iron inlet of the crossroad; A csi camera 83 for capturing the movement of the hoist 82, the metal casing 21 and the body 22; And a monitor (84) for additionally displaying a video signal transmitted from the C-camera (83). The detachable cover of claim 1, wherein the upper body (22A) and the lower body (22B) are separately manufactured, and the lower body (22B) is separately manufactured in one or more stages. delete The bottom central portion of the casing top plate 21A is additionally vertically coupled with a bar-shaped central member 23 and extends toward the bottom central portion of the lower body 22B . The core member (23) is detachable from the body ( 22 ), and the lower end of the core member (23) removable cover for a molten iron wheel crossroad track, characterized in that located on the bottom surface of the lower body ( 22B ). The casing top plate 21A is additionally coupled to at least one of a plurality of lifting lugs L and a plate-shaped ring member 24 having a "c" shaped cross section of a downwardly open type with a flat top surface. Removable cover for a molten iron truck crossroads characterized in that the. The insert (M ') attached to the upper surface of the molten iron wheel (40) inlet (H) is inserted into both sides of the lower surface of the upper body (22A) and the upper end of the lower body (22B). Removable cover for a molten iron car crossroads, characterized in that the forging groove (G) is formed. delete

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