KR20040044320A - A porous plug device for a ladle - Google Patents

Abstract

PURPOSE: A porous plug device for ladle is provided through which gas is more smoothly blown into molten steel in the ladle, which prevents outflow of molten steel and particularly improves cooling efficiency so that life time of the porous plug is extended, and which is easily attached to the ladle and detached from the ladle. CONSTITUTION: The porous plug device(1) for ladle installed on the bottom of the ladle to refine molten steel using bubbles generated by blowing gas into molten steel in the ladle, the porous plug device for ladle comprises a porous plug(30) consisted of multistep porous brick(10) and sleeve brick(20) installed on the outer wall of the multistep porous brick and mounted on the inside of wall brick(110c) installed on the bottom(100a) of the ladle; and a gas blowing unit(50) which is attached to a lower part of the porous plug, on an inner part of which a gas supply head(56) comprising cooling plate(52) and nozzles(54) is rested, to one side of which molten steel backflow preventing means(60) is connected, and in which gas supply pipe is connected to the molten steel backflow preventing means by joint method.

Description

A POROUS PLUG DEVICE FOR A LADLE}

The present invention relates to a ladle plug device (A POROUS PLUG DEVICE) which is installed at the bottom of the ladle used in the steelmaking process to enable gas to be injected into the molten steel in the ladle to perform refining operations of the molten steel. More specifically, while smoothing gas injection into the molten steel in the ladle, effectively preventing the molten steel outflow due to the reverse flow of the molten steel, and in particular, increasing the cooling efficiency to extend the life of the porous plug, while ladle of such a porous plug The present invention relates to a forlas plug device for ladle that can be easily detached and detached.

The molten steel that has been blown during the steelmaking process is subjected to the casting ladle (LADLE) to be sent to the next process, for example, to a refining process. Since the cleanliness is low, the inert gas, that is, argon gas, is passed through the porous plug (POROUS PLUG), which is a porous material installed on the bottom of the ladle, to obtain molten steel of high cleanness.

In other words, the molten steel received in the ladle is subjected to secondary refining to adjust the composition and temperature, and such secondary refining is carried out through argon gas, which is an inert gas, through the porous plug made of porous refractory lead to the molten steel in the ladle. By blowing, it is mainly to reflux molten steel inside the ladle to adjust the fine composition and temperature of the molten steel, for example, by inert gas from the bottom of the molten steel in the ladle through a porous plug of nonferrous metal through a porous plug of nonferrous metal When the phosphorus argon gas is supplied, bubbles formed by the blown argon gas rise to the top to remove impurities contained in the nonferrous metal through redox and degassing, thereby making the components of molten steel uniform. This conventional ladle forrus plug is shown.

That is, as shown in FIG. 1, a conventional porous plug 110 is installed at the bottom portion 100a of the ladle 100, and such a porous plug 110 has a gas pipe 120 for supplying an inert gas. Is connected, the porous plug 110 is composed of a porous lead 110a and the sleeve lead 110b on the inside, the outer side of the well brick (well brick 110c) is fixed to the ladle bottom (100a) portion It is composed.

Therefore, when argon gas, which is an inert gas, is supplied through the gas pipe 120, argon gas generates bubbling from the lower portion of the molten steel through the porous lead 110a, and is included in the molten steel by such bubbling. As the impurity rises, the cleanliness of the molten steel is improved.

However, in such a conventional ladle porous plug 110, since argon gas is blown onto the molten steel through one porous lead 110a, smooth gas blowing is difficult, in which case the gas blowing input is weak, or As the continuous use of the porous plug 110, there was a problem that a serious safety burden is generated that the molten steel is leaked through the plug 110 by the molten iron of the porous plug 110 made of porous lead.

Therefore, since the molten steel in the in-use ladle 100 damaged by the porous plug 110 must be immersed in another ladle, an additional work of re-refining the composition and temperature of the molten steel is necessary, in which case the following playing process is also delayed. Since the reversion does not proceed, the productivity is reduced.

In addition, in the case of replacing the conventional ladle forus plug 110, the worker is mounted on the bottom of the ladle using a jig, etc., so that the operation is delayed, as well as a serious loss or smooth gas injection. There was a difficulty in that the ladle bottom had to be reconstructed when the ladle of the defective porus plug was not replaced.

The present invention has been made in order to improve the various problems as described above, the object is to increase the porous edge of the porous plug to facilitate the gas blowing through the plug, thereby smoothly bubbling in the molten steel in the ladle. It is to provide a forlas plug for the ladle to improve the refining quality of the molten steel by adjusting the composition and temperature of the molten steel appropriately.

Another object of the present invention is to store the cooling gas under the porous plug, while providing a gas inlet to which the molten steel backflow prevention valve is connected, to facilitate smooth gas injection, and particularly to prevent the reverse flow of molten steel when the cooling gas is damaged by the plug. To prevent the burnout of the molten steel by preventing the reverse flow of molten steel as a secondary valve, and to provide a ladle plug for ladle which can extend the life of the porous plug with the cooling gas in the gas inlet. It's there.

1 is a configuration diagram showing a conventional forrus plug for ladle

Figure 2 is a perspective view showing a forrus plug device for ladle according to the present invention

Figure 3 is an exploded perspective view of the present invention for the ladle for the plug plug for the ladle

Figure 4 is a front view showing a ladle installation state of the present invention for ladle porous plug device.

Figure 5 is a side view showing the ladle installation state of the present invention for the ford plug plug ladle.

Figure 6 is an overall configuration diagram showing a porous plug processor for the present invention ladle

7 (a) and 7 (b) are perspective views illustrating main parts of a pushing block and a ring used in a ford plug processor for ladle according to the present invention;

FIG. 8 is a schematic perspective view showing the operation of mounting the ladle forused plug of the present invention to the ladle through the processor of FIGS. 6 and 7; FIG.

Explanation of symbols on the main parts of the drawings

1 .... Polar plug device for ladle 10 .... Porous lead

20 .. Sleeve sleeve and 30 .. Porus plug

50 .... Gas blowing unit 52 .... Cold plate

54 .... Nozzle 56 .... Gas blowing head

58 .... settling groove 60 .... molten steel countercurrent measures

62 .... Gwanbu ... block ball

66 .... spring 70 ... gas supply line

80 .... Porous plug handler84,88 .... cylinder

86 .... Frame 90 .... Pushing block

92 .... hook 94 .... working arm

100 ... ladle 100a ... ladle bottom

110c .... Wellbruck

In the technical configuration for achieving the above object, the present invention, in the ladle porous plug device provided on the bottom of the ladle to refine the molten steel as a bubble generated by blowing gas into the molten steel in the ladle,

A porous plug mounted in a well brick installed at the bottom of the ladle, comprising a multi-stage porous wire and a sleeve wire provided on the outer edge thereof; And,

A gas blowing unit attached to a lower portion of the porous plug, and equipped with a gas supply head having a cooling plate and injection holes therein, and connected to a molten steel countercurrent prevention means at one side thereof, and a gas supply pipe connected thereto in a joint manner; By providing a forus plug device.

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 a forlas plug device for a ladle according to the invention, Figure 3 is an exploded perspective view showing a forrus plug device for a ladle according to the present invention, Figure 4 is a ladle installation state of the forrus plug device for a ladle according to the present invention. 5 is a side view illustrating a ladle installation state of the forrus plug device for ladle according to the present invention.

In FIG. 2, the overall configuration of the present invention ladle porous plug device 1 can be divided into a porous plug 30 and a gas blowing unit 50. In more detail, the porous plug 30 and the unit 50 are as follows.

2 to 4 show the above-mentioned porous plug 30 of the ladle-type porous plug device 1 of the present invention. The porous plug 30 of the present invention has a multi-stage porous lead 10 and its periphery. It consists of a sleeve edge 20 provided in the well brick 110c installed in the ladle bottom (100a).

That is, as shown in FIGS. 2 and 3, the porous edge 10 of the porous plug 30 has an inclined cylindrical inner edge 12 and an outer hollow edge 14 in close contact with each other outward thereof. It is a double edible structure of), such edible (12, 14) is a porous, of course, as shown in Figure 4, as shown in Figure 4, the lower portion of the double porous edible (12, 14) gas pool 30a is formed.

At this time, the inner and outer double porous edges (12) (14) are tightly fixed to the contact surface with each other, such as mortar, and prevents the outflow of molten steel through the contact surface, and eventually the porous lead (10) ) Is formed in two to facilitate the intake of the gas in the molten steel compared to the existing porous lead 110a (FIG. 1), while the melt loss due to the vortex of the molten steel is also doubled to be reduced.

Next, an inclined cylindrical sleeve edge 20 hollowed out inside the porous edge 14 on the outside is likewise closely fixed to mortar, and the sleeve edge 20 is bottom 100a of the ladle 100. The contact surface in the well brick (110c) provided in the) is in close contact with the mortar is tightly fixed so that the porous plug 30 of the present invention is mounted on the bottom of the ladle.

At this time, as will be described in detail later, when the porous plug 30 is mounted in the well brick 100b using the porous plug processor 80 of the present invention, first, mortar is interposed on the inner surface of the well brick 100b. Then, the pusher block 92 of the plug processor 80 is pushed by the porous plug device 1 of the present invention and is simply installed on the bottom portion 100a of the ladle 100.

Next, FIGS. 2 to 4 show a gas blowing unit 50 of the porous plug device 1 according to the present invention. The gas blowing unit 50 of the present invention is located below the porous plug 30. It is attached, the inside of the gas supply head 56 having a cooling plate 52 and the injection holes 54 is seated, the molten steel backflow prevention means 60 is connected to one side and the gas supply pipe 70 is connected in a joint manner It is configured to be.

That is, as shown in Figures 2 and 3, the gas blowing unit 50 is formed in a cylindrical body, the inner hollow portion (50b) that can be stored in a predetermined amount of inert gas, that is, argon gas therein integrally In the bottom side of the inner hollow portion (50b) is formed a mounting groove 58 is inserted into the gas supply head 56 is integrally formed.

3 and 4, the gas blowing unit 50 is formed of a metal material, and an upper surface 50c of the gas blowing unit 50 is formed as mortar on the bottom of the sleeve edge 20 of the porous plug 30. It is tightly fixed so that the porous plug 30 and the gas blowing unit 50 are integrally connected and fixed to constitute the porous plug device 1 of the present invention.

Meanwhile, the gas supply head 56 is also formed of a cylindrical metal material, and the injection holes 54 are arranged to smoothly blow gas into the lower side of the porous plug 30 on the genital head 54. As shown in FIG. 4, the argon gas G supplied through the injection hole 54 of the head is filled in the hollow 50b inside the unit, and primarily blocks the outflow of molten steel through the plug 30. The argon gas (G) is smoothly blown through the porous lead 10 through the bottom gas pool 30b of the double porous leads 12 and 14.

On the other hand, as shown in Figures 2 and 3, the gas supply head 56 is integrally formed with a through opening 56a that is integrally penetrated to the lower side integrally, through which the cooling plate 52 is The cooling plate 52 is formed of a stainless material having high heat resistance, so that the argon gas G is cooled when passing through the gas supply head 56, and the gas supply head 56 and the blowing unit 50 are inserted therein. Is provided to the unit 50 side for cooling to some extent, which is to increase the cooling efficiency of the porous plug device 1 of the present invention as a whole to reduce heat loss due to the high temperature of molten steel to extend its life span. .

Next, as shown in Figures 2 and 3, the gas injection unit 50 of the present invention is provided with a molten steel backflow prevention means 60, such a molten steel backflow prevention means 60, the gas blowing unit ( 50 is screwed to one side of the other side and the other side gas supply pipe 70 is connected to the joint portion 62 and the blocking ball 64 is elastically arranged to block the reverse flow of the molten steel as a spring 66 in the pipe portion 62 ).

That is, when the high-pressure argon gas (G) is supplied to the pipe portion 62, the blocking ball 64 moves while pressing the spring 66 to enable the unit supply of gas, but if the plug 30 is melted If the gas supply is poor when the molten steel flows out to the unit 50 side, the blocking ball 64 blocks the inlet connection end 62a of the pipe portion 62 with the elastic force of the spring 66 to prevent the reverse flow of the molten steel. Finally shut off.

At this time, the connecting end 72 of the gas supply pipe 70 and the pipe inlet portion 62a of the molten steel backflow prevention means 60, although schematically shown in the drawings, are connected to or separated from each other in the form of a joint device 1 ) Is installed in the well brick 110c at the bottom 100a of the ladle 100, and then the gas supply pipe 70 is simply connected to the unit 50 to perform gas supply.

Meanwhile, as shown in FIG. 2, a pressure gauge 74 is connected to the gas supply pipe 70 to adjust a supply pressure of argon gas to be supplied, and a gas supply hose 76 to the pressure gauge 74. ) Is connected, and the gas supply hose 76 is connected to the main supply pipe (not shown).

In addition, as shown in Figure 5, the connecting ends (62a) (62b) that are smaller in diameter on both sides of the pipe portion 62 of the molten steel backflow prevention means 60 are respectively coupled in the form of a threaded ball to the inside of the blocking ball. The 64 and the spring 66 are seated to block the reverse flow of the molten steel, and the one side connection end 62a is screwed into the connection groove 50d formed in the unit 50 to perform unit supply of gas to the molten steel. Prevent backflow.

At this time, as shown in Fig. 3, on both sides of the outer surface of the unit 50, a fixing groove 50a into which the ring 92 of the plug processor 80 described below is fitted is integrally formed. This is facilitated when the unit 50 is separated from the ladle bottom 100a integrally with 30).

Meanwhile, FIGS. 6 to 8 illustrate a processor 80 that easily mounts and detaches the porous plug device 1 according to the present invention to the ladle 100, and the processor 80 is such that the ladle is tilted horizontally. The first cylinder 84 connected to one side along the rail 82 installed in the workshop, the frame 86 having a moving wheel 86a for moving forward and backward, and the front and rear of the frame 86 to move up and down. Pushing horizontally connected to the upper portion of the installed second cylinder 88, the front end is in close contact with the bottom of the gas blowing unit 50 or fitted into the fixing groove 50a formed on the outer surface of the gas blowing unit 50 A working arm 94 is provided with a block 90 or a ring 92.

6 and 8 denote a hydraulic unit, and accordingly, the first cylinder 84 automatically moves the frame 86 according to the operation of the hydraulic unit U, and the moving frame ( The operation of the processor 80 is performed while allowing the second cylinder 88 on 86 to match the height of the working arm 94 to the working height.

That is, as shown in FIGS. 7A and 8, the porous plug device 1 according to the present invention is quickly mounted through the mortar in the web 110c of the ladle bottom portion 100a, and vice versa in FIG. 7B. As described above, when the use of the plug device 1 of the present invention is completed, and the detachment of the ladle with the molten hand of the forage plug 30 is performed, the hook 92 of the processor 80 is installed on the working arm 94, The first and second cylinders 84 and 88 are operated in sequence so as to easily separate from the ladle.

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

As shown in Figures 2 to 8, while smoothing the Irgon gas blowing into the molten steel in the ladle 100 through the porous plug 30, preventing the leakage of molten steel, in particular to increase the cooling efficiency of the porous plug The ladle-type porous plug device 1 of the present invention, which has extended its lifespan, is as follows.

First, as shown in FIGS. 2 and 3, the porous inner and outer double edges 12 and 14 are fixed to each other as mortar, and then fixed to the sleeve edge 20 to fix the porous plug 30. Prepare.

Next, as shown in FIGS. 4 and 5, the gas blowing unit 50 is provided, and the gas supply head 56 having the plurality of injection holes 54 disposed thereon is mounted in the cylindrical unit 50. Inserted in (58), in which a stainless steel cold plate (52) is fitted to the gas supply head (56).

Then, one side and the other side connecting end 62a, 62b of the molten steel backflow prevention means 60 are fastened to the pipe part 62 in which the blocking ball 64 and the spring 66 are inserted, and the one side connecting end thereof. The 62a is fastened and fixed to the screw groove 50d formed in the unit 50. At this time, the connection end 62a is connected to the gas supply head 56 through the screw groove 50d.

Next, as shown in FIGS. 4 and 5, the upper surface 50c of the gas blowing unit 50 and the sleeve edge 20 of the porous plug 30 are closely attached to each other by mortar or the like.

Therefore, the operator tilts the ladle 100 horizontally, as shown in Figs. 2 and 8, and then blows gas connected to the apparatus of the present invention, that is, the porous plug 30 and the bottom thereof, in the well brick 110c. With the unit 50 inserted into the well brick 110c of the ladle bottom 100a for one minute, the pushing block 90 of the processor 80 is operated in the ladle 100 by operating the first cylinder 84. The porous plug device 1 of the present invention is provided.

Next, as shown in FIGS. 2 and 3, the operator connects one joint connection end 72 of the gas supply pipe 70 to the other connection end 62b of the molten steel backflow prevention means 60 in the form of a joint. After that, argon gas G is supplied via the gas supply hose 76 in a state in which the supply pressure is adjusted as the gauge 74.

Therefore, the supplied gas G is the porous double edge 12 of its upper portion through the injection port 54 while cooling the cooling plate 52 of the gas supply head 56 primarily of the unit 50. The gas supplied through the gas pool 30b of 14) is blown into the molten steel, and the refining operation is performed in which the components and the temperature are appropriate as the impurities of the molten steel float as the bubbles generated at this time. In contrast, the plug 30 of the present invention blows gas more smoothly.

On the other hand, the outflow of the molten steel to flow back through the lead 12, 14 by the gas (G) stored in the inner hollow portion 50b is primarily prevented, which is the argon gas (G) supplied unit ( This is because molten steel does not flow through the edges because it is stored at a constant pressure in the inner hollow portion 50b of the 50).

By the way, when the porous lead 120 (14) of the porous plug 30 burns out due to the vortex of molten steel, the molten steel flows out to the unit 50 side through which the outflow as argon gas on the inner circumferential hollow portion 50b. However, if it continues to flow out, the blocking ball 64 of the backflow prevention means 60 of the unit 50 blocks the pipe part 62 to prevent the outflow of molten steel secondarily, and eventually the apparatus of the present invention ( The gas injection is smooth by 1), and the outflow of molten steel can be blocked for 2 times, thus improving stability.

Next, as shown in FIGS. 4 and 5, the gas supply head 56, the unit 50, and the gas supply head 56 are provided by the cooling plate 52 provided in the inner gas supply head 56 of the gas blowing unit 50. The cooling efficiency of the plug 30 attached thereto is increased because argon gas continuously supplied cools the cooling plate 52, and thus the cooling plate 52 is schematically illustrated in the drawings, but is possible. In this case, it may be preferable to arrange the plurality while increasing the size thereof.

Then, as shown in FIG. 7, in order to separate the porous plug device 1 from the ladle 100, the hook 92 of the processor 80 is fixed to the fixing groove 50a of the unit 50. When the first cylinder 84 is retracted after being inserted in, the porous plug device 1 of the present invention is simply detached from the ladle 100.

Accordingly, according to the porous plug device 1 for ladle according to the present invention, while the gas blowing amount is increased, the gas blowing through the porous lead is smooth to facilitate the refining process of the molten steel through the bubble, the cooling of the device (1) It can be easily mounted and detached to the ladle 100 through the processor 80 while increasing the efficiency to increase the life.

As described above, according to the present invention, the porous plug for ladle increases the porous edge of the porous plug to facilitate gas blowing through the plug, so that bubbles are smoothly generated in the molten steel in the ladle so that the composition and temperature of the molten steel can be properly adjusted. It is effective in improving the refining quality of molten steel.

In addition, while storing the cooling gas to the lower side of the porous plug, while installing a gas inlet to which the molten steel backflow prevention valve is connected, not only smooth gas injection, but also primarily blocks the reverse flow of the molten steel when the cooling gas is damaged by the plug, As a valve, the reverse flow of the molten steel is secondarily prevented to prevent equipment damage caused by the molten steel, as well as providing an excellent effect of extending the life of the porous plug with the cooling gas in the gas inlet.

In addition, through the porous plug processor, the ladle attachment and detachment of the porous plug integrated with the gas inlet can be easily performed as a treatment device so that the ladle detachment and attachment of the porous plug can be performed quickly and safely. It provides an advantage.

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 (4)

In the porous plug device 1 of the ladle 100 provided at the bottom of the ladle to refine the molten steel as a bubble generated by blowing gas into the molten steel in the ladle, A porous plug 30 having a multi-stage porous edge 10 and a sleeve edge 20 provided on the outside thereof and mounted in a well brick 110c installed on the bottom of the ladle 100a; And, It is attached to the lower portion of the porous plug 30, the inside of the gas supply head 56 having a cooling plate 52 and the injection holes 54 is seated, the molten steel backflow prevention means 60 is connected to one side and the gas Porus plug device for a ladle, characterized in that configured as; gas blowing unit 50, the supply pipe is connected in a joint manner The method of claim 1, wherein the porous edge 10 of the porous plug 30 is a double edge 12 (14) is integrated, the edges 12, 14 of the porous edge 10 and the Sleeve edge and (20) is mortar, the contact surface is tightly fixed, The sleeve edge 20 is a forlas plug device for the ladle, characterized in that the outer wall of the well brick (well brick) (110c) is closely adhered as a mortar. According to claim 1, wherein the inside of the gas blowing unit 50, the seating groove 58 is formed integrally therein, the seating groove 58 in which the gas supply head 56 is seated, the seating fixed to the seating groove 58 The gas supply head 56 is provided with a whole through opening 56a into which the cooling plate 56 is fitted. The gas blowing unit 50 is firmly integrally fixed as a mortar under the sleeve edge 20 of the porous plug 30, and the integrated gas blowing unit 50 and the porous plug 30 are plug processing machines. A forrus plug device for a ladle, characterized in that it is attached to and detached from the well brick 110c on the bottom of the ladle as 80. The method of claim 1, wherein the molten steel backflow prevention means (60), A pipe part 62 screwed to one side of the gas blowing unit 50 and a gas supply pipe 70 connected to the other side in a joint form; and A blocking ball 64 elastically disposed to block reverse flow of molten steel as a spring 66 in the pipe portion 62; and the gas blowing head 56 of the pipe portion 62 and the gas inlet 50. Pole plug device for ladle, characterized in that connected to each other through the unit inside