KR100862818B1 - A plug for a converter tapping hole - Google Patents

Abstract

After tapping a portion of the molten steel in the converter, converter outlet plugs are provided to prevent the slag from entering the slag when the molten steel is redrawn.

The converter outlet plug may include: a cylindrical body inserted into the outlet of the converter; and a movable body slidably disposed inside the cylindrical body and provided with a stopper and a cap at an upper side thereof; and a hinge form at an upper end of the cylindrical body. A plurality of furnaces are overlapped and developed as a stopper when the movable body moves, and a cap is installed to be fixed after deployment as a cap, and includes a wing member configured to block external leakage of slag through the converter outlet, wherein the wing member is pressed when the stopper is pressed. It consists of a horizontal part inserted into the cylindrical body and integrally extended at a right angle from the horizontal part and developed in a horizontal state when the horizontal part of the stopper is pressed in close contact to block leakage of the tap hole of the molten steel.

Therefore, according to the present invention, when the molten steel is raised to the ladle in the converter, it is possible to effectively suppress the mixing of the slag into the ladle during the re-elevation of the molten steel to provide an effect of improving the quality of the molten steel.

Converter, converter tapping, ladle, slag, slag blocking plug, converter plug

Description

A tap plug for preventing slag mixing into slag during re-eluting of converters {A PLUG FOR A CONVERTER TAPPING HOLE}             

1 is a schematic diagram showing a molten steel tapping operation for tapping the molten steel to the ladle from the converter.

2 is a perspective view showing a converter outlet plug according to the present invention;

Figure 3 is a partial cutaway perspective view showing the internal structure of the converter outlet plug

Figure 4 is a structural diagram showing the operating state of the converter outlet plug

Figure 5 is a structural diagram for explaining the wing operation of the converter outlet plug

Figure 6 shows the wing member of the converter outlet plug of the present invention,

(a) is a schematic exploded perspective view

(b) is an essential part showing the inner wing

(c) is an essential part showing the outer wing

Figure 7 is a perspective view showing the blade deployment state of the present invention converter plug

Explanation of symbols on the main parts of the drawings

1 .... hatch plug 10 .... converter                 

12 .... converter door 20 .... cylinder body

22 .... Guide groove 40 .... Moving object

40a .... cylindrical moving body 40b .... screw bar

42 .... Stopper 44 .... Cap

46 .... guide rod 48 .... nut block

60 .... wing member 60a, 60a '.... wing level

60b, 60b '.... wing vertical 62 .... push pin

The present invention relates to a converter outlet plug for tapping a portion of the molten steel in the converter and then preventing the ladle mixing of the slag upon re-emergence of the molten steel, and more particularly, in the case of tapping the molten steel into the ladle in the converter, The present invention relates to a tap-hole plug which suppresses slag incorporation during re-elevation of a converter to improve the quality of molten steel by effectively suppressing the incorporation of slag into the ladle.

In general, molten iron from the blast furnace is charged to the converter through the molten iron preliminary treatment steps such as desulfurization and delineation, and the molten iron charged into the converter is made by the lime and dolomite, which are injected for refining oxygen and refining through the oxygen lance. Silicon, carbon, manganese, phosphorus, etc. contained in the molten iron are changed into molten steel while being removed by oxidation. In this process, slag (SLAG) is generated in the molten steel by the various raw materials and the various oxidation reactions mentioned above.

On the other hand, as shown in Figure 1, the molten steel (m) undergoing the refining process as described above is subjected to a refining process over a second to satisfy the final quality specifications, at this time to conduct the secondary refining in the converter 100 The molten steel is pulled into the ladles 110 which are transport and refining containers for the steel.

By the way, since the slag (s) in the upper portion of the molten steel (m) having a lower specific gravity than the molten steel first passes through the converter outlet 102, the slag (s) does not exit to the converter outlet 102 at the beginning. It is a conical plug (not shown) that is generally used to prevent the plug, such a plug is melted by its own weight and melted by the molten steel when the molten steel exits into the tap and disappears into the ladle itself.

That is, since the tapping hole 102 of the converter 100 is manufactured by passing a hole through the converter, that is, the upper part of the container, it does not have a special opening and closing device. (S) is located in the upper part of the molten steel, and first, the exit port is closed by using the plug because it flows out through the converter outlet port 102. A commonly used tap hole plug (not shown) has a conical shape. It is easy to use when starting the first (first) tapping, but when re-taking the converter, the conical plug starts from 75 °, which is the transition point of the slow tilting angle at the high tilting angle of the converter. In case of re-learning, slag (S) flows out from the turning point to 85 ° at low speed, and thus pollution of molten steel in ladle 110 Due to the further addition of deoxidizer there are problems such as the rise in manufacturing costs.

That is, the converter 100 is normally tilted using the operating lever, but the control is performed so that it can be tilted only at a low speed above 75 °, which is a threshold that can be tilted at high speed in order to stably melt the melt. In the slag (S) is quickly passed through the exit 102, the upper part of the exit, but when the re-elevation, the tilting speed of the converter is changed from high speed to low speed, the converter moves, the slag (S) is slowly slowed down the exit entrance (102) By passing through), the slag (S) around the exit is incorporated into the ladle 110 through the converter exit (102).

At this time, the converter re-learning described above means to tap 1/2 of the molten steel in the converter in one ladle 110 and to tap 1/2 of the converter molten steel in the other ladle. Since other ladles that use a conventional conical plug (not shown) and re-elevate have a slow tilting speed of the converter, it is difficult to effectively block the ladle incorporation of the slag with a conventional conical plug.

The present invention has been made in order to improve the various problems as described above, the purpose of which is to use a cone-shaped plug when the initial tapping, the wing member that can block the tap inside the tap when re-raising the ladle steel Since the wing member blocks the slag and prevents the slag from leaking to the outside, the outlet plug which suppresses the slag incorporation during the re-elevation of the slag that prevents the slag from entering the molten steel during reheating of the converter is prevented. To provide.

As a technical configuration for achieving the above object, the present invention, in the outlet plug for preventing the ladle mixing of the slag during re-eluting of the converter, a cylindrical body inserted into the outlet of the converter; and the cylindrical body A movable body slidably disposed at an inner side thereof and provided with a stopper and a cap at an upper side thereof; And a wing member that is overlapped with a plurality of hinges at the upper end of the cylindrical body and is deployed as a stopper when the movable body is moved, and is installed to be fixed after deployment as a cap to block external leakage of slag through the converter outlet. ,
The wing member is integrally extended at a right angle from the horizontal portion and the horizontal portion inserted into the cylindrical body when the stopper is pressed to develop in a horizontal state when pressing the horizontal portion of the stopper close to block the leakage of the tap hole of the molten steel By providing a tap plug for preventing the slag mixing of the slag during the re-elevating molten steel of the converter consisting of.

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

Figure 2 is a perspective view showing the converter outlet plug according to the invention, Figure 3 is a partial cutaway perspective view showing the internal structure of the converter outlet plug of the present invention, Figure 4 is an operating state of the converter outlet plug of the present invention. 5 is a structural diagram for explaining the wing operation of the converter outlet plug of the present invention, Figure 6 is a view showing the blade of the converter outlet plug of the present invention, Figure 7 is a converter outlet plug of the present invention. Is a perspective view showing a wing deployment state.

First, Figure 2 and Figure 3 shows the overall configuration of the outlet plug 1 of the present invention as a perspective view, the tap plug 1 of the present invention is largely cylindrical body 20 and the moving body 40 And, it can be divided into the wing member 60, each of these components 20, 40, 60 will be described in more detail as follows.

3 and 4 show the cylindrical body 20 of the tap plug 1 of the present invention, the cylindrical body 20 of the present invention, the tap hole 12 of the converter 10 It is designed to be inserted.

That is, as shown in Figure 4, the cylindrical body 20 of the present invention is composed of a hollow cylindrical body with the front, the rear opening, such a cylindrical body 20 is the diameter of the converter outlet 12 It is slightly smaller than the inner diameter of, which takes into account the thickness of the deployment part 60b of the wing member 60, which will be described later, and the size of the sum of the diameter of the cylindrical body 20 and the thickness of the wing member deployment part 60b is the above. Match the inner diameter of the converter outlet (12).
2 and 4, guide grooves 22 for guiding the guide rods 46 of the movable body 40 to move through the center body both sides of the cylindrical body 20 are described below. It is integrally formed in the longitudinal direction, and the lower end of the cylindrical body 20 is formed with a fastening groove 24 to which a jig (not shown) for fastening a tap opening of the plug is integrally formed.

Next, FIG. 3 and FIG. 4 show the movable body 40 of the outlet plug 1 of the present invention. The movable body 40 of the present invention is slidably inward of the cylindrical body 20. It is arranged and has a stopper 42 and a cap 44 on the upper side.

That is, the movable body 40 includes a cylindrical movable body 40a in which the stopper 42 is mounted on the upper outer circumference, and the cap 44 is fixed to the upper end, and the guide groove 22 of the cylindrical body 20. The nut bar 48 to which the guide rod 46 inserted into the bolt is fixed is fastened, and the screw bar 40b is integrally connected and fixed to the lower end of the cylindrical movable body 40a.

At this time, as shown in Figures 3 and 4, the guide rod 46 is a nut block 48 and the guide groove 22 in a state protruded through the guide groove 22 of the cylindrical body (20) Is bolted and assembled through the lower opening of the cylindrical body 20 in the moved state below, and then the screw bar 40b of the movable body 40 is connected to the nut block 48 to which the guide rod 46 is assembled. The movable body 40 is integrally moved when the guide rod 46 is moved by being fastened. Since the guide rod 46 is supported by both guide grooves 22 of the cylindrical body 20, the movable body 40 is The movement is stably performed along its center line at the inner center of the cylindrical body 20.

And, as shown in Figure 4, according to the fastening of the screw bar 40b and the nut block 48 of the movable body 40, the position of the guide rod 46 is variable, the guide rod 46 is jig Is fastened to the fastening groove 24 of the cylindrical body 20 so that the plug 1 is caught by the outer surface of the tap hole 12 when the plug 1 is inserted into the converter tap hole 12, the screw bar of the movable body 40 The fastening of the nut block 48 of 40b should be adjusted in view of the thickness of the converter outlet 12 so that at least the wing member 60 is deployed when the movable body 40 descends.

Next, Figures 3 to 6 show the wing member 60 of the outlet plug 1 of the present invention, such a wing member 60 of the present invention, the hinge form of the upper end of the cylindrical body 20 A plurality of furnaces are overlapped and developed as the stopper 42 when the movable body 40 moves, and the cap 44 is installed so as to be fixed after deployment as the cap 44 so as to block external leakage of the slag through the converter outlet 12.

That is, as shown in Figures 3 and 6, the wing member 60 is a horizontal portion (60a) is inserted into the cylindrical body 40 when the stopper 42 is pressed, and the horizontal portion ( 60a) is integrally extended at right angles and is developed in a horizontal state when the horizontal portion 60a of the stopper 42 is pressed in close contact with the developing portion 60b to block leakage of the tap hole 12 of the molten steel.

Therefore, as shown in FIGS. 4, 5, and 7, after the plug 1 is inserted into the converter outlet 12, the stopper of the movable body 40 is pulled by pulling the guide rod 46 of the movable body. 42 is inserted into the inside of the cylindrical body 20 while pressing the horizontal portion 60a of the wing member 60, and at the same time, the deployment portion 60b of the wing member disposed adjacent to the outer surface of the cylindrical body 20. Is deployed in a horizontal state is fixed by the cap 44 installed on the upper end of the mobile cylindrical moving body (40a).

As a result, the converter tapping hole 12 is sealed by the wing member 60 having the deployed part 60b, thereby preventing the slag from being sucked into the ladle when the converter molten steel is redrawn.

On the other hand, as shown in Figure 6, the wing member 60 is in the upper periphery of the hinge block 62a and the cylindrical body 20 provided at the inner boundary of the horizontal portion 60a and the deployment portion 60b. The fixing pin 62 is fastened between the installed hinge blocks 62b so as to be deployed on the upper portion of the cylindrical body 20.

6B and 6C, the wing members 60 are horizontally positioned 60a, 60a 'and deployment portions 60b and 60b' disposed inside and outside so as to overlap and form a circle when deployed. It includes, it is overlapping when the wing members 60 of the present invention are deployed to each other to closely block the external leakage of the slag, the outer deployment portion (60b ') is slightly spaced apart from the cylindrical body 20 is horizontal It is made of a configuration that is connected to the hinge block 62a (62b) and the pin 62 in the lower portion (60a ').

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

As shown in FIGS. 2 to 7, when the steel tapping in the ladle in the converter 10 taps 1/2 of the molten steel in the first ladle, and then taps 1/2 of the remaining molten steel in the other ladle. When re-elevating the molten steel of the converter of the present invention to effectively prevent the outflow of the slag through the converter outlet (12) after the plug (not shown) of the cylindrical body used first is released from the tapping hole The tap plug 1 for preventing slag mixing of the slag is as follows.

First, as shown in Figures 2 to 4, when looking at the assembly of the outlet plug (1) of the present invention, after passing the guide rods 46 through the guide grooves 22 of the cylindrical body 20, respectively, Fixing the end and the nut block 48 by bolting, in this case, as shown in Figure 3, the guide rod 46 is inserted into the bolt fixed to the nut block 48 and tightened as a nut, such bolting operation Is performed by moving the guide rod 46 as far down as possible in the guide groove 22 through the lower opening of the cylindrical body (20).

Next, the screw cap 40b is integrated with the cylindrical movable body 40a of the movable body 40 through the upper side opening of the cylindrical body 40 to rotate the upper cap 44 of the cylindrical movable body 40a to screw. The bar 40b is fastened to the nut block 48 to which the guide rod 46 is fixed. In this case, the amount of rotation of the screw bar 40b is as described above. The amount of rotation is adjusted so as to be inserted into the inside of the sphere 12 so that the movable body can be deployed (when lowering).

Next, as shown in FIG. 6, the hinge block 62a of the wing member 60 and the hinge block 62b installed on the cylindrical body 20 are fitted together and fastened as fixing pins 62. Each of the horizontal portions 60a, 60a 'and the unfolding portions 60b, 60b' of the 60 and the outer wing member 60 are fastened on the cylindrical body 20 so as to overlap each other.

Therefore, as shown in FIGS. 4 and 5, the operator fastens the jig to the fastening groove 24 of the cylindrical body 20, and then inserts the plug 1 into the converter outlet 12 and the guide rod 46. The converter is inserted until it is in close contact with the outer surface of the tapping hole 12.                     

Next, as shown in FIGS. 5 and 7, when the guide rod 46 is lowered (pulled surface) in the state in which the plug 1 is inserted into the converter outlet 12, the guide rod 46 and the nut block are provided. As the cylindrical movable body 40a descends integrally with the screw bar 40b of the movable body 40 connected by the 48, the stopper 42 installed in the cylindrical movable body 40a is the wing member 60 shown in FIG. Press the horizontal portion (60a) (60a ') of the, and eventually the deployment portion (60b) (60b') of the wing member 60 is fixed horizontally to the cap 44 to block the converter outlet (12). .

Thus, as shown in Figure 5, the wing member 60 of the tap plug 1 of the present invention is developed in a circular shape as a whole to seal the converter outlet 12, and eventually when the steel re-elevation of the converter 10 Even if the converter is tilted at a low speed, the slag (S) does not leak through the converter outlet.

At this time, the plug (1) of the present invention is made of steel, melted when the tilting of the converter is completed and the molten steel is tapping, the ladle tapping of the molten steel through the converter tapping hole 12 is smoothly made.

As described above, according to the tap plug for preventing the ladle mixing of the slag during the re-taking of the converter, the cone-type plug is used during initial tapping, but the blade that can block the tap inside the tap when the ladle is retapped. As the member is deployed, the wing member blocks the slag and prevents the slag from leaking out, thereby providing the effect of completely preventing the ladle mixing of the slag upon re-elevating the converter.

Therefore, when tapping the converter's molten steel into the ladle, especially when slag is prevented from reheating the converter, it improves the ferroalloy and the deoxidizer error rate, reduces the swelling, and improves the overall quality by reducing the inclusion of molten steel. It is therefore to provide an apparatus of the present invention with an excellent effect of providing cost reduction and improvement of molten steel quality.

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)

In the tap plug 1 for preventing the slag mixing of the slag when the molten steel is redrawn of the converter, A cylindrical body 20 inserted into the exit hole 12 of the converter 10; and a slidably disposed inside the cylindrical body 20 and provided with a stopper 42 and a cap 44 at an upper side thereof. Moving body 40; And, a plurality of overlapping in the form of a hinge on the upper end of the cylindrical body 20 is deployed as the stopper 42 when moving the movable body 40, and installed as a cap 44 after the deployment fixed to the converter outlet (12) Includes; wing member 60 configured to block the external leakage of the slag through; The wing member 60 is integrally extended at right angles from the horizontal portion 60a and the horizontal portion 60a inserted into the cylindrical body 40 when the stopper 42 is pressed, so that the horizontal portion of the stopper is pressed. A tap plug which prevents slag mixing during slag re-taking of a converter, characterized in that it is developed in a horizontal state when closely pressed and is formed with a developing part 60b that blocks leakage of the tap hole 12 of the molten steel. According to claim 1, wherein the cylindrical body 20 is composed of a hollow cylindrical body with the front and rear opening, the central groove of the cylindrical body 20 is provided with a guide groove 22 formed integrally in the longitudinal direction , The converter outlet plug, characterized in that the lower end of the cylindrical body 20 is formed integrally with the fastening groove 24 is fastened to the jig for inserting the tap opening of the plug. According to claim 1, wherein the moving body 40, The stopper 42 is mounted on the upper outer periphery, the upper end of the cylindrical cylinder (40a) is fixed to the cap 44; And, The nut bar 48 to which the guide rod 46 inserted into the guide groove 22 provided in the cylindrical body 20 is bolted is fastened, and a screw bar fixedly connected to the lower end of the cylindrical movable body 40a. 40b; Converter outlet plug, characterized in that configured to include delete According to claim 1, The wing member 60 is a hinge block (62a) provided on the inner boundary of the horizontal portion (60a) and the deployment portion (60b) and the hinge block (installed on the upper periphery of the cylindrical body (20) 62b) is installed to be deployed in the upper portion of the cylindrical body 20 by the fixing pin 62 is fastened between, The wing member 60 has a converter outlet plug comprising a horizontal portion (60a) (60a ') and the deployment portion (60b) (60b') disposed in the inner side, the outer side so as to overlap the overlap when deployed.

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