KR20040029888A - Ladle - Google Patents

Abstract

PURPOSE: A ladle is provided in which slag is separated from molten steel so that molten steel is directly injected into refining furnace or tundish without removing of the slag. CONSTITUTION: The ladle(10) comprises a cylindrical outer skin(11) in which molten steel is contained; a refractory material(12) installed on the inner surface of the outer skin; lugs(13,14) for moving and tilting the outer skin; a charging pipe(20) for injecting molten steel longitudinally installed on the side surface of the outer skin with being inclined to a certain angle on the outer surface of the outer skin; an outlet for circulating molten steel by communicating a lower part of the charging pipe with an inner part of the outer skin; a circular arc shaped housing(40) installed along the outer circumferential surface of the ladle on an upper part of the ladle; a slag blocking plate(41) which is charged into the housing and lowered and lifted through an opening port formed on an upper part of the housing so that the slag blocking plate is projected to an upper part of the ladle; and a driving means for lowering and lifting the blocking plate according to ascending of the ladle through a crane, wherein the driving means comprises guide bar, disk(46), and long hole(45), and wherein the ladle further comprises a removing means comprising a removing member(50).

Description

Ladle {ladle}

The present invention relates to a ladle, and more particularly, to a ladle in which slag and molten steel are separated so that molten steel can be directly injected into a refining furnace or tundish without removing slag.

In general, the ladle is for injecting molten steel that has been blown in the steelmaking process into a refinery or tundish, and the molten steel in the steelmaking furnace is taken to the casting ladle together with slag and the ladle containing the molten steel is moved to the next process by a crane. It is transferred to inject molten steel into the refinery or tundish.

Therefore, when molten steel is contained in the ladle, slag, which has a higher specific gravity than molten steel, rises to the upper part of the molten steel to form an upper layer, and thus, the slag forming the upper layer must be removed before charging the molten steel into the refining furnace.

For this purpose, the ladle 100 containing the molten steel as shown in FIG. 9 is moved to the slag discharge stand 150 to remove the slag, which is the upper layer of the molten steel, into the slag port 110 by using a separate device such as a skimmer 200. .

As such, the conventional ladle has to go through several steps to remove slag and has a problem of operating a separate facility for slag removal.

Accordingly, the present invention has been made to solve the above problems, and the object is to provide a ladle that does not require slag removal work so that only molten steel can be injected by separating the molten steel and slag during molten steel injection from the ladle. have.

In addition, another object of the present invention is to provide a ladle that can fundamentally block the incorporation of slag that may occur when the ladle is tilted.

1 is a partial cutaway perspective view of a ladle according to the present invention,

2 is a partially cutaway perspective view showing a state where molten steel is loaded in the ladle according to the present invention;

3 is a view showing a state of use of the ladle according to the present invention,

4 is a perspective view of a ladle according to another embodiment of the present invention;

5 is a partial detail view of FIG. 4 in accordance with the present invention;

6 is an operating state diagram of the ladle according to another embodiment of the present invention,

7 is a state diagram used in the ladle according to another embodiment of the present invention,

8 is a schematic cross-sectional view showing some operating states of a ladle according to another embodiment of the present invention;

9 is a perspective view of a ladle according to the prior art.

Explanation of symbols on the main parts of the drawings

10: ladle 11: outer jacket

12,21,22,31: refractory 13: rug

14: Lightweight Rug 15: Trinion

20: charging pipe 30: outlet

40 housing 41 blocking plate

42: Refractory 43: Slit

44: guide bar 45: longevity

46 disc 47: guide roll

50: removal member

In order to achieve the object described above, the present invention, in the ladle, the charging pipe for injecting molten steel to the outer surface of the ladle is installed in the longitudinal direction inclined at an angle with respect to the side of the ladle, The lower end of the entrance tube has a structure in communication with the inside of the ladle.

In addition, the present invention may further include a slag blocking portion to be drawn out to the upper side when the ladle is tilted on the upper end of the charging observation of the ladle to prevent the outflow of slag.

Therefore, when the ladle is inclined to inject molten steel, the molten steel flows out through the charging tube because the angle of the charging tube is smaller than the angle of the inner surface of the ladle with respect to the horizontal plane, and the molten steel flows out from the slag layer of the ladle. The molten steel located below allows the molten steel to be directly injected without slag removal.

And the upper part of the ladle during the ladle tilt for charging the molten steel is to increase the height by the slag blocking portion to prevent the slag outflow through the upper part of the ladle.

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

1 is a partially cutaway perspective view illustrating a ladle according to the present invention, and FIG. 2 is a partially cutaway perspective view illustrating a state where molten steel is loaded in the ladle according to the present invention.

According to the drawings, the ladle 10 has a cylindrical outer shell 11 containing molten steel, a refractory 12 installed on the inner surface 11 of the outer shell 11, and an outer surface and a bottom surface of the outer shell 11. Is installed in the ladle 10 includes a lug 13 and the tilting lug 14 for moving and tilting.

In the present invention, in the ladle 10 having the above-described structure, a charging pipe 20 for injecting molten steel into the outer surface 11 of the ladle 10 is provided on the side of the ladle 10. It is installed at an angle with respect to the ladle 10 extends from the bottom to the upper portion, the bottom of the ladle 10 to form a discharge port for discharging molten steel so as to communicate with the lower inner side of the charging pipe (20). The charging pipe 20 and the outlet 30 have a structure in which the refractory materials 21 and 31 are installed inside.

The installation position of the charging pipe 20 is the opposite side of the tilting lug 14, because when the tilting lug 14 is lifted by a crane, the opposite side, that is, the mounting position of the charging pipe 20 is inclined downward to be.

The charging pipe 20 is installed to be inclined toward the ground with respect to the inner surface of the ladle 10 perpendicular to the ground so that the angle formed between the inner surface and the ground is smaller than 90 degrees.

Therefore, when the ladle 10 is tilted to inject molten steel, the angle of the charging tube 20 is lower than that of the side of the ladle 10 so that the molten steel flows out through the charging tube 20.

On the other hand, the refractory material 31 installed in the outlet 30 is preferably a refractory material 31 having a single structure having the same structure as the outlet 30 for the protection of the adjacent refractory (12).

In addition, the inner surface of the charging pipe 20 has the same structure as the ladle 10, and the shape refractory 21 is formed, and the tip from which molten steel flows is formed of castable refractories 22 to increase bearing capacity.

In addition, the inner diameter of the charging pipe 20 is different from the upper end and the lower end, respectively, the inner diameter of the structure is increased as it proceeds to the upper end of the molten steel flows from the lower end connected to the outlet 30.

This is to ensure that when the foreign matter contained in the molten steel is caught in the charging pipe 20, the foreign material falls back into the ladle 10 when tilting the ladle 10 to its original position. .

The operation of the ladle according to the above embodiment will be described with reference to FIG. 3 as follows.

When the molten steel is received inside the ladle 10, the molten steel is filled into the charging pipe 20 through the inside of the ladle 10 and the outlet 30, and the hot water surface of the molten steel continues to rise beyond the outlet 30. Then, the ladle 10 and the charging pipe 20 are blocked by the side wall of the ladle 10 so that only the molten steel is introduced into the charging pipe 20 through the discharge port 30.

Therefore, the slag layer formed on the molten steel is formed only on the ladle 10.

In this way, the ladle 10 in the state of receiving molten steel moves the hook of the sovereignty to the lug 13 installed on the side to move to the working position, and the molten steel can be directly injected into the refining furnace without additional slag removal work.

When the ladle 10 is tilted by hanging the hook of the right to the tilting lug 14 below the ladle 10, the ladle 10 is inclined toward the installation of the charging tube 20, and through the charging tube 20. Molten steel flows out.

That is, since the injection tube is more inclined toward the ground than the inner surface of the ladle 10, when the ladle 10 is inclined as described above, the molten steel received in the ladle 10 is also inclined in a horizontal state, and the inclination is relative. As it flows through the lower injection tube.

And since the slag layer formed on the molten surface in the ladle 10 is blocked by the side wall of the ladle 10 does not flow into the injection tube, only molten steel can flow out through the injection tube.

This process works the same even if gradually increasing the tilt angle of the ladle 10 in accordance with the molten steel injection, because the angle of the injection tube with respect to the horizontal plane is lower than the sidewall angle of the ladle 10.

If the ladle 10 is continuously tilted as described above, the height of the molten metal is lowered according to the discharge of the molten steel, but the molten steel is introduced into the injection pipe through the discharge port 30 formed at the lower portion of the ladle 10, so that the slag There is no possibility of inflow into the injection tube through the outlet 30.

Meanwhile, as shown in FIG. 3, when the tilt angle of the ladle 10 reaches the a angle, the molten steel in the ladle 10 is mostly discharged through the injection tube, and the upper slag of the molten steel is formed at the bottom and the length of the ladle. Part of the entrance 20 will remain.

In this state, the ladle 10 is tilted to the original state to suppress the discharge of the slag and move to the slag discharge position to tilt the ladle upside down to exclude the slag.

When the ladle 10 is moved to the slag port and fully tilted, the slag contained in the ladle 10 is discharged to the port through the ladle 10 or the charging pipe 20.

On the other hand, according to another embodiment of the present invention, the slag blocking portion for preventing slag outflow is further provided on the top of the ladle.

Ladles provided with the slag blocking unit are well illustrated in FIGS. 4, 5 and 6 and will be described below with reference to the drawings.

That is, the ladle 10 is a charging pipe 20 for injecting molten steel to the outer surface of the outer shell 11 is inclined at an angle with respect to the side of the ladle 10 at the top of the ladle 10 Is installed to extend to, the ladle 10 to form a discharge port 30 through which molten steel is discharged to communicate with the lower inner side of the charging pipe 20, the charging pipe 20 and the discharge port 30 is Refractories 21 and 31 are installed on the inner side, and the slag blocking part is further provided to prevent slag outflow at the upper end of the ladle 10 at the position where the injection pipe is installed.

The slag blocking portion is raised and lowered through an arc-shaped housing 40 installed along the upper outer circumferential surface of the ladle 10 and an opening formed in the upper portion of the housing 40 and the upper portion of the ladle 10. And a driving means for raising and lowering the blocking plate 41 in accordance with the use of the slag blocking plate 41 and the ladle 10 protruding to each other.

The inner surface of the blocking plate 41 is attached to the refractory 42 for the protection of the blocking plate 41 to the portion in contact with the slag.

The driving means is installed on the side of the blocking plate 41, the guide bar 44 protruding through the slit 43 of the outer surface of the housing 40, and the lug hook is hooked to lift the ladle 10 Lug 13 so as to be movable to the lug 13 with respect to the disk 46, which is installed on the (13) and the end of the guide bar 44 is placed on the outer peripheral surface, the triion (15) installed on the ladle (10) It is formed in the (13) consists of a long hole (45) to which the triion (15) is coupled.

Therefore, when the lug 13 is lifted by the crane, the lug 13 is lifted with respect to the trion 15 via the long hole 45, and the disc 46 pushes the guide bar 44 and the guide bar 44. The blocking plate 41 provided with 44 protrudes upward from the housing 40.

Here, it is preferable to install a guide roll 47 at the end of the guide bar 44 for smooth contact with the outer circumferential surface of the disc 46.

And since the rotation axis of the ladle 10 is the triion 15, the disc 46 has a ladle (the center thereof coincides with the lower end of the long hole 45 formed along the longitudinal direction of the lug 13). 10) When tilting, the axis of rotation of the triion 15 and the disc 46 to be coincident with each other.

In addition, when the slag is attached to the refractory plate 42 of the inner surface, the blocking plate 41 may not easily enter the inside through the opening of the housing 40, for this purpose, the slag blocking unit When the blocking plate 41 is lowered further includes a removal means for removing the slag attached to the refractory of the blocking plate 41.

The removal means is the lower end is hinged rotatably to the upper end of the ladle 10 to cover the opening of the housing 40 and the free end of the removal member 50 forming a blade with a sharp side end surface toward the top It is made, including.

According to the present embodiment, the removal member 50 has a lower end spaced apart from the inner surface of the blocking plate 41 by a predetermined distance so that the center of gravity of the removing member 50 is inclined toward the blocking plate 41. Accordingly, the removal member 50 receives the rotation moment toward the opening of the housing 40 so that when the blocking plate 41 enters the housing 40, the removing member 50 covers the opening of the housing 40 and the blocking plate 41 is closed. When it comes out of the housing 40 is lifted by the blocking plate 41, the upper end of the removal member 50 is in close contact with the inner surface of the blocking plate 41.

Hereinafter, the operation state of the ladle 10 according to another embodiment of the present invention as described above with reference to Figures 7 and 8 as follows.

When the molten steel is received inside the ladle 10, the molten steel is filled into the charging pipe 20 through the inside of the ladle 10 and the outlet 30, and the hot water surface of the molten steel continues to rise beyond the outlet 30. Then, the ladle 10 and the charging pipe 20 are blocked by the side wall of the ladle 10 so that only the molten steel is introduced into the charging pipe 20 through the discharge port 30.

Therefore, the slag layer formed on the molten steel is formed only on the ladle 10.

When the ladle 10 is lifted by hanging the hook of sovereignty on the lug 13 installed on the side of the ladle 10 in the state of receiving molten steel as described above, the lug 13 first lugs the triion 15 against the lug 15. The length of the long hole 45 formed in the (13) is lifted and lifted up, and when the triion 15 is caught by the lower end of the long hole 45, the ladle 10 is lifted.

That is, the lug 13 is first lifted by the length of the long hole 45 with respect to the ladle, and thus the disc 46 installed on the lug 13 is raised, which is in contact with the outer circumferential surface of the disc 46. The guide bar 44 is lifted up.

As the guide bar 44 is pushed along the disc 46, the blocking plate 41 provided with the guide bar 44 rises from the housing 40 and protrudes over the ladle 10 through the opening.

Therefore, the height of the upper end of the ladle 10 can be increased by the height of the blocking plate 41. In addition, even when the ladle 10 is tilted, the guide roll 47 installed on the guide bar 44 is rolled along the disc 46 so that the guide bar 44 from the triion 15 which is the center of the disc 46 is rolled. The distance to reach the same, and it will be in the state which raised the blocking plate 41 continuously.

Here, as the opening plate of the housing 40 is covered by the removal member 50, as the blocking plate 41 protrudes as described above, the removal member 50 is rotated about the rotational axis of the lower end to block the blocking plate. It is in close contact with the inner surface of the 41.

In this state, as shown in FIG. 7, when the ladle 10 is tilted by hanging the hook of the bow on the tilting lug 14 below the ladle 10, the ladle 10 is inclined toward the side where the charging pipe 20 is installed. As the molten steel flows out through the charging pipe (20).

In this process, when slag overflows to the upper part of the ladle 10 due to the sudden ladle 10 tilting or the like, the blocking plate 41 protruding to the upper part of the ladle 10 overflows to the upper part of the ladle 10. The slag is prevented to prevent the slag from leaking out.

On the other hand, when the ladle 10 is returned after the molten steel injection operation is finished and the slag is discharged, the lug 13 is lowered with respect to the trinion 15 by the play of the long hole 45 by the weight of the lug 13. do.

Therefore, the disc 46 is also lowered and the blocking plate 41 lifted by the disc 46 via the guide bar 44 enters the housing 40 again by its own weight.

At this time, the slag attached to the blocking plate 41 is separated by the removal member 50 in close contact with the inner surface of the blocking plate 41 as shown in FIG.

According to the molten steel loading ladle according to the present invention as described above, it is possible to reduce the time and effort required for slag removal by not having to perform a separate slag removal operation after taking the molten steel in the ladle.

In addition, there is no need to have a facility such as a skimmer for slag removal work, there is an effect that can lower the cost of manufacturing equipment and products.

In addition, it is possible to prevent the molten steel temperature drop due to the slag removal operation and thereby the deterioration of the molten steel.

Claims (3)

A cylindrical shell containing molten steel, a refractory installed on the inner surface of the shell, a lug for moving and tilting the shell, a molten steel injection installed in the longitudinal direction on the side surface of the shell at an angle to the outer surface of the shell. A charge pipe for discharging the molten steel by communicating the lower part of the charge pipe with the inside of the shell, an arc-shaped housing installed along an outer circumferential surface at an upper portion of the ladle, and an opening formed in the housing and formed at an upper end thereof. Ladle comprising a slag blocking plate which is raised and lowered through the ladle and the driving means for raising and lowering the blocking plate in accordance with the rising of the ladle through the crane. According to claim 1, wherein the drive means is installed on the side of the blocking plate and protrudes through the slit of the outer surface of the housing, the disc is installed on the lug of the ladle and the end of the guide bar is placed on the outer peripheral surface, A ladle comprising a long hole formed in the lug so that the lug flows, the triion is coupled. According to claim 1 or claim 2, wherein the lower end is hinged rotatably to the top of the ladle to cover the opening of the housing and the free end is blocked by including a removal member forming a blade with a sharp side cross-section toward the top Ladle further comprising a removal means for removing the slag attached to the refractory of the blocking plate when the plate is lowered.