KR200287927Y1 - Slag cutting stopper used for controlling slag inflow - Google Patents

Abstract

The present invention relates to a slag cutting stopper, and the slag cutting stopper according to the present invention is a refractory used in TL C (Torpedo Ladle Car), a facility for carrying and transporting molten iron, which is hot water, from a steel mill blast furnace. It is used to prevent the slag floating on the molten steel from entering the ladle when the ladle, which is a container for transporting molten iron, is used. Since it is used in the process of removing slag of molten iron from the blast furnace, there is a considerable amount of slag in T.L.C. The slag cutting stopper is designed to be the middle level between molten steel and slag, so slag is injured and caught on the stopper due to the difference in specific gravity when unloading the ladle, and the molten steel is pulled out below the stopper to suppress the inflow of slag.

Description

Slag cutting stopper used for controlling slag inflow}

The present invention relates to a slag cutting stopper for preventing slag inflow, and more specifically, slag of TL C used in Torpedo Ladle Car (hereinafter referred to as TL C) to separate molten steel and slag with a refractory composed of a basic material. It relates to a slag cutting stopper for preventing inflow.

In general, slag cutting stoppers are fireproof designs aimed at separating molten steel and slag from molten iron. Various types have been developed and used at present, and the principles are the same in the characteristics of the workplace, but they are applied differently in terms of form, technology or input time. It is manufactured in consideration of the shape and operational convenience.

Conventional slag cutting stuffer is ladle which is a container that carries out molten iron by depositing lance in TL C, which is a transport facility, and then conducts molten iron by power-injecting desorbent. It functions to suppress the incorporation of slag floating on the surface into the ladle when it is outboard.

As a slag cutting stopper, there is a conventional T-shaped product, which has a large amount of slag, and when the slag layer is thick, the slag is cut over the boundary line preventing the inflow of slag, thereby increasing the possibility of slag inflow.

In addition, when the amount of molten iron is large or small, there is a problem in that the amount of molten iron in T. L. C. is almost constant because the position of the refractory varies due to the difference in specific gravity.

The present invention is to solve the above-mentioned problems, the object of the present invention is to supplement and improve the shortcomings of the existing refractory and at the same time the main material is high fire resistance considering the environment by collecting and recycling the hot repair agent generated during the facility repair process in steelworks It is to provide a slag cutting stopper having a slag inflow inhibiting structure.

Another object of the present invention in connection with the above object is that the molten iron temperature in the TL C is higher than 1500 ?? high temperature, so that it has resistance to erosion or melting by molten iron using a high refractory material, and also from room temperature to high temperature. It is to provide a slag cutting stopper having durability and strength due to the rapid temperature change of and thereby extending its life.

1 is a view showing a slag cutting stopper injection process according to the present invention.

FIG. 2 is a view illustrating a process in which slag is excluded by a stopper and only molten steel is pulled out of the ladle in T.L.C.

3a, b, c, d is a view showing the internal structure of the slag cutting stopper according to the present invention.

Figure 4a is a view showing a coupling structure with the coupling device according to the present invention.

Figure 4b is a view showing another embodiment of the coupling structure with the coupling device according to the present invention.

** Description of the symbols for the main parts of the drawings **

1 ... T.L.C

2 ... slag

3 ... molten steel

4.Stopa

The slag cutting stopper according to the present invention for achieving the above object is a slag cutting stopper for preventing the slag from flowing out when the molten steel flows out from the inside of the toledo ladle car, A support part supported by the support means positioned outside the upper and lower positions of the control unit; A body provided below the support to support the molten steel in the torpedo ladle car and the slag; Characterized in that it comprises a slag holder protruding from one side of the body.

And preferably the body is characterized in that it is formed to be bent so as to increase the outer diameter toward the central portion from the edge.

In addition, the body is preferably provided with a refractory forming the exterior and a slab embedded in the interior of the refractory and a plurality of round rods extending to one side from the slab to extend outside the body, the support is integral with the body And a pipe mounted inside the refractory and the refractory and coupled to the support means.

In addition, the slab and the outer periphery of the pipe is characterized in that a plurality of anchors are installed to reinforce the coupling force is coupled to the round bar and the slab.

In addition, a tab is formed on a portion exposed to the outside of the body of the round bar, the slag holder is characterized in that coupled to the tab of the round bar is installed.

Hereinafter, one preferred embodiment according to the present invention will be described in more detail with reference to FIGS. 1, 2, and 3.

First, the conceptual structure and operating state of the slag cutting stopper according to the present invention will be described.

The most basic condition of the slag cutting stopper 4 required in the present invention is the specific gravity, which is as follows. The molten iron removed from the blast furnace and transferred to T. L. C (1) has a large amount of impurities, and the by-products of the various reactions generated during the processing of these impurities float on the surface of the molten iron to form a slag layer.

Since the slag 2 has a specific gravity of less than 2 to 3, which is considerably lighter than that of molten iron, the slag 2 is present on the surface, and thus it is divided into a slag layer and a molten steel layer made of impurities. Therefore, after the powder blowing through the lance is finished to the ladle 20 to transport to the converter, which is the next process, in order to prevent the slag (2) in the TL C (1) to be mixed into the ladle 20 The slag cutting stopper as in the present invention is required, and the refractory specific gravity must be adjusted to the middle of the slag 2 and the molten steel 3 so that the stopper 4 effectively cuts the boundary between these two layers.

On the other hand, the operation of the slag cutting stopper 4 is fastened to the TL C (1) by engaging with the coupling rod 6, which is a supporting means, and then TL C (1) sideways to step out to the ladle 20 At this time, the slag layer 2 existing in the upper part is caught by the stopper 4 and is not mixed into the ladle 20. Only the molten steel 3 is pulled out, thereby producing clean molten steel and slag at the same time. The inflow of can be suppressed.

However, when the amount of slag 2 present in the molten steel 3 is large, the possibility of the slag 2 flowing through the boundary between the stopper 4 and the slag 2 is high. The slag dam 36 was enlarged to maximize the area for inhibiting the inflow of the slag 2 by devising a wide cross-sectional area of the boundary where the lower part meets.

In addition, since the specific gravity is the middle level between the slag (2) and the molten steel (3), as the molten steel (3) is discharged to the ladle 20, the height of the slag layer is gradually lowered. In the late stage, the possibility of inflow of slag 2 is high.

On the contrary, the present invention installed a moving pin 39 to minimize the inflow of the slag 1 at the end of the tapping period in consideration of the moving range gradient of the stopper 4 according to the molten steel variation in T. L. C (1).

As a technical form of the present invention for minimizing the mass inflow of slag at the end of the tapping, the slag dam 37 is formed by oval-shaped the body 4a of the stopper 4, and the slag holder 34 is separately included. , Slag holder (34) was installed to compensate for the disadvantage that the tapping speed is reduced instead of the inflow of the slag (2) between the end of the tapping period by the slag dam (37). Therefore, the molten steel 3 is smoothly discharged between each holder 34 and the holder 34.

In addition, even though the slag 2 is introduced due to the immature operation of the TL C (1), the holder 34 has a smaller amount of the inflow of the slag 2 than before, and the wall and the stopper inside the TL C (1) 4) is in close contact with the role of preventing the phenomenon of reducing the space discharged molten steel.

On the other hand, the slag cutting stopper 4 of the present invention has a high temperature in the place where it is used when the input at room temperature causes a thermal explosion phenomenon due to the temperature change affects the durability of the stopper (4). This increases the bonding strength and durability by adding a heat-resistant anti-foaming agent to have resistance to thermal expansion and thermal expansion because it causes a lot of troubles. Basically, the main raw materials used are magnesia series and chromium oxide, which are excellent in fire resistance. Aluminum, silicon oxide, etc. to induce the improvement of the fire resistance of the stopper 4 to extend the life of the product and at the same time to obtain an efficient and economical effect.

Hereinafter, the configuration and effect of the slag cutting stopper 4 according to the present invention as described above will be described.

1 and 2, the slag cutting stopper 4 according to the present invention is coupled and supported by a separate support means. The support means includes a coupling ring 12, a coupling member 5 to which the coupling ring 12 is coupled, a coupling rod 6 for axially supporting the coupling member 5, and a coupling rod and a ladle car. The hanger 7 which supports a shaft is provided.

The slag cutting stopper 4 is an elliptical rugby ball-shaped body 4a and the coupling member 5 described above, as shown in FIGS. 3, 4 and 5. ) Is coupled to the coupling member (5) by inserting the fixing pin (38) into the pinhole (8) penetrating the side.

3 shows the internal structure of the stopper 4 according to the present invention. Referring to FIGS. 3A and 3B, there is a coupling pinhole 8 having a diameter of 30 mm, and a fixing pin 38 is inserted into this portion. The wave 4 is attached, and as shown in FIGS. 3c and 3d, the slab 33 is embedded inside the body 4a because the volume is too large for the weight of the stopper 4 itself. It is a means to increase specific gravity.

And in order to increase the binding force of the refractory slab 33 and the pipe 30, the anchors (31, 32) are planted on the outside to form a shape of a high refractory material, the slab 33 and the inside of the stopper (4) In the pipe 30, the distance between the anchors (21, 32) and the stopper (4) was calculated, and the anchors (31, 32) of different heights were planted on the horizontal and vertical axes to minimize the spalling phenomenon of the product. Metal fibers were added to induce bonding strength of the refractory materials.

3A and 3C, the front surface of the slab 33 is attached with a round bar 35 to tab the end of the round bar, and the slag holder 34 of the same refractory type is inserted into the tab processing area. The role of 34 is as follows.

The molten iron in T.L.C (1) is divided into a slag layer at the top, a mixed layer of slag and molten steel, and a molten steel layer. As the molten steel layer becomes thinner at the end of tapping, the slag is mixed as the mixed layer flows in. In order to maximize the error rate of the molten steel as much as possible to receive a lot of residual molten steel (3) in the ladle 20 at this time a large amount of inflow of the slag (2) occurs. In the present invention, the slag holder 34 is mounted in consideration of this point, and the slag holder 34 has a wall inside the TLC 1 in order to reduce the amount of the slag 20 at the end of the tapping to minimize the amount thereof. Since it is attached to form a concave-convex shape, the amount of slag inflow is significantly reduced compared to the existing design.

In addition, when convex parts such as slag dams 36 and 37 have little molten steel at the end of tapping, they have a relatively high specific gravity compared to slag 2 so that they close to the TLC wall and block the space where the molten steel will be discharged. It will also play a role in securing the discharge space, taking into account the possible possibilities. 3A and 3C are similar in overall form to FIGS. 3B and 3D, but only the convex slag dams 36 and 37 are formed without the slag holder 34 attached thereto, so that the TLC 1 can be joined according to circumstances. It is designed to be applied to the stopper (4).

Currently, the TLC (1) inlet (10) is manufactured in three types of 700 ~ 1020mm in size and is used in the TLC (1) with a small width, it is difficult to put the slag holder 34 attached to the state. .

4a shows a moving gradient in which the position of the stopper 4 can be moved according to the molten iron dose. However, the conventional design has no spatial margin in which the position of the stopper 4 moves downward when the amount of the molten iron is small. The stopper 4 according to the present invention applies the moving pin 39 to the coupling member 5 in consideration of such a moving space, and maintains a constant height irrespective of the molten iron dose. It is designed so that the present invention can be used without.

4B shows a form in which the stopper 4 and the coupling member 5 are directly coupled to the pin 40 regardless of the amount of molten steel, which is fixed to the stopper 4 and the peripheral equipment so that the TLC 1 is fixed. By tilting to the side, it is a simplified model so that it can always be used without being bound by the amount of molten steel by fixing it to the position in front of the entrance 10.

As described above, the chartered ship from the blast furnace is transported to the TLC 1 as shown in FIGS. 1 and 2 and transported to the pretreatment plant. The prepared stopper 4 is introduced into the inlet 10 of the TLC 1. When the stopper 4 is manufactured according to the intermediate weight of the slag 2 and the molten steel 3, the stopper 4 is positioned between the slag 2 and the molten steel 3.

The stopper 4 has a length determined according to the diameter of the inlet 10 of the TLC 1, but if the stopper 4 is too small than the inlet 10, slag is discharged through both sides of the diameter. Consider a range that closely matches the inlet 10 of.

The hanger 7 on both sides of the round bar 6 is attached to the fixing groove 11 of the upper part of the TLC so that the slab can sink into the ladle 20 when the stopper 4 sinks into the TLC 1 or moves to the side. Is to prevent leakage. Figure 2 shows a schematic view of tapping the molten steel by tilting the transport container of the TLC 1 to remove slag and to discharge only molten steel after laminating, but the inlet 10 of the TLC 1 is stoppered. Since (4) is blocked, the molten steel (3) having a high specific gravity is stepped out through the stopper (4) to the ladle (20), and the slag (2) having a relatively low specific gravity is caught on the top of the stopper (4). You will not be allowed to attend. Since the shape of the stopper (4) is not a perfect circle but has an elliptical shape, the slag 2 is maximized by maximizing the slag separation efficiency of the slag 2.

When the tapping of the molten steel is completed, the TLC (1) is raised to restrain the inflow of the slag (2), and then the stopper (4) is recovered from the TLC inlet (10) to prepare the next process, and the slag (2) is prepared separately. It is conveyed to the slag treatment plant through the conveying device.

The slag cutting stopper for preventing the inflow of slag according to the present invention as described above is used for several times, not the product used at once, so as to maintain the erosion and fire resistance by the molten iron to ensure economic efficiency through the improvement of product life. In addition, there is an effect to minimize the introduction of slag compared to the conventional cutting stopper.

Claims (5)

In the slag cutting stopper for preventing the slag from flowing out together when the molten steel flows out from the inside of the toppeddle ladle car, A support part which is supported to be adjustable in an up and down position by a support means located outside the torpedo ladle car; A body provided below the support to support the molten steel in the torpedo ladle car and the slag; Slag cutting stopper, characterized in that it comprises a slag holder protruding from one side of the body. The slag cutting stopper according to claim 1, wherein the body is formed in an elliptical shape whose outer diameter increases from the edge to the central portion. According to claim 1 or 2, wherein the body is provided with a refractory forming the appearance, a slab embedded in the interior of the refractory and a plurality of round rods extending to one side from the slab to extend outside the body, And the support portion includes a refractory unit integrated with the body and a pipe mounted inside the refractory unit and coupled to the support unit. 4. The slag cutting stopper of claim 3, wherein a plurality of anchors are installed at outer peripheries of the slab and the pipe to reinforce the coupling force of the round bar and the slab. 4. The slag cutting stopper according to claim 3, wherein a tab is formed at a portion exposed to the outside of the body of the round bar, and the slag holder is coupled to the tab of the round bar.