JP5135569B2 - Ladle refining apparatus and ladle refining method - Google Patents

Description

The present invention relates to a ladle refining device, and more specifically, a heating device for heating and refining the bath steel in the ladle, the ladle being positioned below the heating device, and the bath steel in the ladle The present invention relates to a ladle refining apparatus and a ladle refining method that are adapted to heat refining.

Conventionally, ladle refining equipment is widely known. For example, Patent Document 1 discloses a ladle refining device as a simple device for out-of-furnace refining equipment.
In a ladle refining device, first, molten steel (bath steel) melted and refined by a refining furnace such as a steelmaking furnace or an arc electric furnace, that is, a molten metal is received in a ladle. The ladle travels to the lower side of the heating device of the ladle refining device composed of the furnace lid and the graphite electrode array arranged with respect to the furnace lid.
When the ladle is placed on the traveling carriage and reaches the bottom of the furnace lid, the vertically movable furnace lid is lowered, and the graphite electrode array is inserted into the ladle.
The graphite electrode array penetrates the inside of the furnace lid, and the upper electrode located above the furnace lid is held so as to be movable up and down separately from the furnace lid.
In the state as described above, the molten metal in the ladle placed on the traveling carriage is heated with arc (DC or AC power) by the refining device, and the ladle is placed on the traveling carriage. The bath steel inside is heated and refined (see Patent Document 1).

  In the ladle refining equipment described above, the ladle is placed on the traveling carriage and the molten metal in the ladle is heated and refined by arc, so the carriage moves quickly after refining. By doing so, there is a feature that the ladle containing the molten metal can be moved toward the next process.

JP-A-10-72615

However, in this conventional ladle refining apparatus, the ladle and the traveling cart on which the ladle is placed are in an inseparable relationship, and the molten metal in the ladle is heated and refined with arc. During the running time, the traveling cart on which the ladle is placed becomes monopolized by the ladle being heated and refined, and there is a problem that hinders efficient diversion of the traveling cart. Regarding the technical matter in this respect, as is apparent from the flow line drawn in the column of the prior art in FIG. 5, always including the time during which the molten metal in the ladle is heated and refined by arc. The ladle and the traveling carriage are integrated, and the cycle time required for heating and refining takes a significantly longer time than in the case of the present invention.
Furthermore, when a ladle containing molten metal is directed to the next processing step after predetermined heating and refining in the ladle refining device, a traveling cart paired with the ladle is used. Since it must be used, the traveling carriage will move further away from the first starting point, and it will take a long time to return to the first starting point as is apparent from FIG. . Therefore, there has been a problem that the operating efficiency of the ladle refining apparatus is further reduced.

The purpose of this application is to release the ladle cart that has been moved with the ladle in the process of heating and refining the bath steel in the ladle in the ladle refining device so that it can be used freely. An object is to provide a ladle refining apparatus and a ladle refining method .
Another object is to use the second ladle trolley different from the ladle trolley that has moved with the ladle at the time of completion of heating and refining the bath steel in the ladle, It is an object of the present invention to provide a ladle refining apparatus and a ladle refining method that can take away a ladle after completion of heating and refining.
Other objects and advantages will be readily apparent from the drawings and the following description associated therewith.

The ladle refining apparatus in the present invention,
A furnace lid 11 for covering the ladle 6 is provided with an electrode 12 for heating the bath steel in the ladle 6;
On the other hand, the lower side of the furnace lid 11 includes a space 14 in which the ladle 6 mounted on the ladle cart 5 can enter and exit,
Against the underside of the furnace cover 11, it is positioned in a state that is moved upward by the receiving member 22 of the mechanism 16 deposits ladle the ladle 6 and the furnace lid 11 and Futagi, to the electrode 12 In a ladle refining device that supplies electric power and heats and refines the bath steel in the ladle 6,
Below the space 14 where the ladle 6 mounted on the ladle cart 5 can enter and exit, a receiving member 22 for receiving the ladle 6 and a support means 18 for supporting the receiving member 22 and moving up and down. Installed ladle storage mechanism 16 equipped with
On the other hand, around the space 14, the first ladle trolley 5 a and the second ladle trolley 5 b are respectively directed toward the space 14 where the ladle 6 mounted on the ladle trolley 5 can enter and exit . and fewer or the two first passage 4b to allow forward and backward, with causing a second passage 4c, and their first passage 4b, the second passage 4c, respectively the space 14 a first ladle carriage 5a to freely reciprocate individually towards the second ladle truck 5b arranged,
A through hole for allowing the receiving member 22 in the ladle storage mechanism 16 to move up and down in each ladle mounting region 28 in each of the first ladle cart 5a and the second ladle cart 5b . 29 ,
Furthermore, on the lateral side of each through hole 29 of each of the first ladle trolley 5a and the second ladle trolley 5b,
To receiver member 22 or supporting means 18 through hole 29 in the mechanism 16 Luggage ladle is in a state of being above the upward movement, the lack portion 30 for enabling out from the side respectively allowed comprising,
In a state where the ladle 6 is received by the receiving member 22 in the ladle storage mechanism 16, a first ladle cart 5 a disposed in the first passage 4 b and a second ladle are disposed below the ladle 6 . The second ladle trolley 5b arranged in the passage 4c is individually movable forward and backward, and the ladle storage is performed with the first passage 4b and the second passage 4c directed to the sides. Free movement in a direction away from the mechanism 16 is possible .

Also preferably, the ladle refining method of the present invention,
  A furnace lid 11 for covering the ladle 6 is provided with an electrode 12 for heating the bath steel in the ladle 6;
  On the other hand, the lower side of the furnace lid 11 includes a space 14 in which the ladle 6 mounted on the ladle cart 5 can enter and exit,
    The ladle 6 is positioned in a state where the ladle 6 is moved up by the receiving member 22 of the ladle storage mechanism 16 with respect to the lower side of the furnace lid 11, and the furnace lid 11 is attached to the electrode 12. In the ladle refining method in which electric power is supplied and the bath steel in the ladle 6 is heated and refined,
  Below the space 14 where the ladle 6 mounted on the ladle cart 5 can enter and exit, a receiving member 22 for receiving the ladle 6 and a support means 18 for supporting the receiving member 22 and moving up and down. A ladle storage mechanism 16 equipped with
  On the other hand, around the space 14, there are at least two second trolleys that allow the ladle trolley 5 to advance and retreat toward the space 14 in which the ladle 6 mounted on the ladle trolley 5 can enter and exit. The first passage 4b and the second passage 4c are provided, and the first passage 4b and the second passage 4c are individually reciprocated toward the space 14, respectively. 1 ladle cart 5a and 2nd ladle cart 5b
  A through hole for allowing the receiving member 22 in the ladle storage mechanism 16 to move up and down in each ladle mounting region 28 in each of the first ladle cart 5a and the second ladle cart 5b. 29,
  Furthermore, on the lateral side of each through hole 29 of each of the first ladle trolley 5a and the second ladle trolley 5b,
  The receiving member 22 or the support means 18 in the ladle storage mechanism in the above-described upwardly moving state is provided with a lacking portion 30 for allowing the through hole 29 to enter and exit from the side, respectively.
   In the heating and refining, the ladle 6 containing the bath steel is placed on the first ladle trolley 5a, and the first passage in front of the missing portion provided on the traveling side of the first ladle trolley 5a. Put the first ladle cart 5a in the space 14 through 4b,
  The support means 18 and the receiving member 22 of the ladle storage mechanism 16 are raised, the ladle 6 is raised, the furnace lid 11 is covered, power is supplied to the electrode 12, and the bath steel in the ladle 6 is heated. During the refining process, the first ladle trolley 5a passes through the space 14 and is freely operated sideways through the first passage 4b.
  After completion of the heating and refining process, the first ladle trolley 5a has already come out of the space 14, so that the missing portion provided on the traveling side of the second ladle trolley 5a passes through the second passage 4c. The second ladle trolley 5b is placed in the space 14, the support means 18 and the receiving member 22 of the ladle storage mechanism 16 are lowered, and the ladle 6 is placed on the second ladle trolley 5b. The pan cart 5b is moved back to the second passage 4c, moved laterally along the second passage 4c, and the ladle 6 is transported to the next stage.

As described above, according to the present invention, the ladle storage mechanism 16 is provided below the ladle storage space 14 provided on the lower side of the furnace lid 11, and the space 14 is moved toward the ladle storage mechanism 16. Since the ladle 6 can be carried on the ladle cart 5a from one side, the ladle 6 can be transferred to the ladle storage mechanism 16, and the ladle cart 5a can be turned back in an empty state. The ladle trolley 5a that has been turned back can be freely operated even during the time zone in which the molten metal in the ladle 6 is heated and refined above the ladle storage mechanism 16 for the next heating and refining. There is a feature that makes it possible to prepare for. This is effective in improving the operating rate of heat refining.

Furthermore, at the time of completion of heating and refining, the second ladle trolley 5b different from the first ladle trolley 5a brought in the ladle 6 from the one side is from the other side different from the one side. Since the ladle 6 that enters the ladle storage mechanism 16 and that has been heated and refined can be taken out, the space 14 located below the furnace lid 11 is immediately subjected to the first from the one side. The ladle 6 placed on the ladle trolley 5a can enter and the next heating and refining work can be started in a very short time. From this aspect, the effect of improving the operating rate of the heating and refining can be achieved. is there.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a positional relationship between a ladle refining device and a vacuum degassing facility (RH) in an out-of-furnace refining facility, where (A) is a state without a ladle cart 5 and (B) is a ladle cart. The state where 5 is arranged is shown. FIGS. 2A and 2B are schematic front views for explaining the positional relationship among a ladle refining apparatus, a vacuum degassing facility, a ladle carriage 5 and a ladle 6 in an out-of-core refining facility. FIGS. 3A and 3B are partially broken front views for explaining the positional relationship among the ladle storage mechanism 16, the ladle cart 5, and the ladle 6. FIGS. 4A and 4B are plan views for explaining the relational positions before and after placing the ladle 6 on the ladle cart 5. (C) The figure is the front view seen from the right side of (B) figure, Comprising: It is a front view for demonstrating the relationship between the ladle trolley 5, the ladle 6, and the ladle custody mechanism 16. FIG. FIG. 5 shows a cycle time table for explaining the relationship between the ladle cart 5, the ladle refining device 2, and the vacuum degassing equipment in the conventional example and the present embodiment.

1 to 4, reference numeral 1 denotes an installation place of the outside refining equipment, and a ladle refining device (hereinafter also simply referred to as LF) 2 and a vacuum degassing equipment as a secondary refining furnace in a very limited narrow place. An example in which (RH) 3 is installed is shown. 4 shows the ladle movement route.
In the ladle refining apparatus 2, as is well known, an electrode 12 for heating the bath steel in the ladle 6 is provided to a furnace lid 11 for covering the ladle 6. The apparatus 10 is comprised (refer FIG. 2). On the other hand, a space 14 in which the ladle 6 mounted on the ladle cart 5 can enter and exit is provided below the furnace lid 11 as shown in FIG. Then, the ladle 6 is positioned with respect to the lower space 14 of the furnace lid 11, the furnace lid 11 is covered with the ladle 6 as shown in the figure, and power is supplied to the electrode 12 to take the ladle 6. The bath steel in the pan 6 is heated and refined.

The ladle storage mechanism 16 shown in FIGS. 2 and 3 is provided below the space 14 in which the ladle 6 mounted on the ladle cart 5 can enter and exit as shown in the figure. The ladle storage mechanism 16 includes a receiving member 22 for receiving the ladle 6 and support means 18 that moves up and down while supporting the receiving member 22.
Around the space 14 existing above the ladle storage mechanism 16, there are a plurality of passages 4 (at least two) that allow the ladle cart 5 to selectively move back and forth with respect to the space 14. The ladle carts 5a and 5b are arranged in the passages 4 so as to freely reciprocate toward the space 14, respectively.

In the ladle storage mechanism 16, a deep hole (pit) 17 is provided at a position lower than the work surface (GL) as a place for installing the mechanism 16 as shown in FIGS. A custody mechanism 16 is installed. In the mechanism 16, reference numeral 18 denotes a support means for supporting the ladle 6 and is configured by installing a base frame 19 that is made of a hard material such as steel and is movably moved up and down. Reference numeral 20 denotes a guide means provided so as not to cause the base frame 19 to roll. The guide means 20 corresponds to the relative relationship with the surface facing the base frame 19 such as a guide roller, a guide rail, or a rubbing surface. Consists of sturdy guide means.
Reference numeral 21 denotes a vertical drive device having a known arbitrary configuration for moving the base frame 19 up and down. For example, as is well known, the base is installed at the bottom of the pit and the upper movable part is mounted on the base frame 19. 1 shows a hydraulic drive device. 22 is a table-shaped receiving member made of a hard material such as steel mounted on the upper portion of the base frame 19, and 23 is a receiving portion that constitutes a part of the receiving member. 40 can be carried.

In the ladle trolley 5, since the ladle 6 needs to be moved, a ladle mounting region 28 as shown in FIG. 4 is provided on the upper side. The ladle 6 can be placed in the ladle mounting area 28 in a relative relationship between the ladle cart 5 and the ladle 6 as shown in FIGS. 4 (B) and 4 (C). .
Furthermore, below the ladle loading area 28 in the ladle cart 5, there is a through hole 29 (see FIG. 4C) for allowing the receiving member 22 to move up and down in the ladle storage mechanism 16. In order to allow the receiving member 22 or the support means 18 (base frame 19) in the ladle storage mechanism elevated through the through-hole 29 to escape to the side, it has at least a corresponding shape dimension that allows it to escape (or more). The missing portion 30 (notched portion) having a larger shape dimension is provided on the side of the through hole 29. As shown in FIG. 4, when the missing portion 30 exists, the ladle 6 is received by the receiving member 22 in the ladle storage mechanism 16 as is clear from FIG. 3 (the ladle 6 is placed on the receiving member 22. The ladle trolley 5 can be taken out and put freely below the ladle 6 in a state where the ladle is placed).

  In the ladle trolley 5, reference numeral 25 indicates a pedestal frame that is firmly constructed of a hard material such as steel as is well known, and 26 is a wheel provided in an arbitrary number as required, and is used for the ladle trolley. The pan movement path 4 has a configuration corresponding to the configuration of the passages (4a to 4f) illustrated in FIG. For example, when the passage is a rail, it is a wheel having a configuration corresponding to the rail. 27 shows the presence of a case in which a well-known drive unit and a control unit provided as necessary are accommodated. In the figure, the case is provided in a portion called the rear side of the ladle cart 5 that can freely move back and forth. It is. In the ladle mounting region 28 described above, 29 is a through hole (which may be a recess) for receiving the receiving member 22 and can be accommodated corresponding to the outer shape of the receiving member 22 located at the top dead center. It only needs to be large. Reference numeral 30 denotes the aforementioned escape missing portion, which also has a size corresponding to the outer shape of the receiving member 22 (or the base frame 19) located at the top dead center so that it can relatively escape in the direction of the arrow 54. .

  In the ladle cart 5, the ladle support member 32 (see FIGS. 3 and 4) provided in the ladle mounting region 28 is made of a hard material such as a steel material to support the ladle 6. Specifically, in order to support the lower edge (seat seat 43) of the bulging reinforcing member 41 integrally formed around the ladle 6 in a stable state from both sides, the ladle As shown in the figure, they are attached to the cart 5 in a state of facing each other. Reference numeral 34 denotes a front end portion (engagement portion) for engaging with the lower edge (the seat 43) of the reinforcing member 41 in the ladle 6. As apparent from FIGS. 3A and 3B, the height of the engaging portion 34 is such that the engaging portion 34 engages with the abutment seat 43 when the base frame 19 in FIG. 3A is lowered. In the state in which the base frame 19 of 3 (B) is raised, the engaging portion 34 is largely separated from the abutment seat 43, and the dimensions are set such that the ladle cart 5 can freely enter and exit in the direction of the arrow 54.

  The ladle 6 has a well-known configuration, 38 is an inner bath steel storage space, 39 is a peripheral wall, 40 is a bottom member, 41 is a belt-shaped reinforcing member formed around the peripheral wall 39, and 42 is a ladle. 6 is a hook hook provided in a projecting state on both sides of the ladle 6 for use in lifting the crane with a crane, and 43 is a seat using a stepped portion on the lower side of the belt-like reinforcing member 41. Show.

The vacuum degassing equipment (RH) 3 as a secondary smelting furnace indicates the existence of one based on a well-known configuration. In the figure, 48 indicates a vacuum chamber, 49a indicates an ascending side dip tube, and 49b indicates the presence of a descending side dip tube.
Next, the ladle moving path 4 for the ladle cart shown in FIGS. 1 and 2 will be described. This route 4 represents the moving route of the ladle 6. The passages (4 a to 4 f) are paths for passing the ladle cart 5. 4a shows a turntable and the 1st ladle cart 5a receives the ladle 6 with the bath steel from a crane on it. The first ladle cart 5a turns 90 degrees and passes through the passage 4b toward "LF".

The implementation status of the above configuration will be described.
First, FIG. 1, of the ladle movement path 4 for ladle truck that appearing in FIG. 2, the first ladle carriage 5a is assumed to be located on a turntable 4a. For example, a ladle 6 in which bath steel melted and refined by a smelting furnace or the like is stored is carried on a first ladle cart 5a by a crane (not shown) and placed in the state shown in FIGS. 4B and 4C. It is done. The ladle 6 changes its direction on the turntable 4a by 90 degrees and passes through the first passage 4b with the missing portion 30 provided on the traveling side of the ladle cart 5a as shown in FIG. It goes to “LF” (see the flow line indicated by reference numeral 60 in FIG. 5). As described above, in “LF”, since the space 14 is vacant, the first ladle cart 5a enters the “LF” in the state of FIGS. 3 (A) and 4 (C). Next, the support means 18 and the receiving member 22 of the ladle storage mechanism 16 are lifted as shown in FIG. 3B, and the heating apparatus 10 is lowered as shown in FIG. Reference is made to the flow line indicated by reference numeral 62). On the other hand, since the ladle 6 is eliminated from the first ladle cart 5a, it is separated from the ladle storage mechanism 16 as shown by reference numeral 61 in FIG. 1 (B) and FIG. Returning to (refer to the flow line indicated by reference numeral 61 in FIG. 5), preparation for receiving the ladle 6 in which the next bath steel is accommodated is prepared.

At the time the refining process is completed in the "LF" is below the ladle 6 located "LF" gap another second ladle truck 5b enters by that missing first ladle carriage 5a 1B, the carriage shown by the one-dot chain line in FIG. 1B, that is, the second ladle carriage 5b advances in the direction of the arrow 56 through the second passage 4c (reference numeral 63 in FIG. 5). Enter the lower side of “LF”. Therefore, when the support means 18 and the receiving member 22 of the ladle storage mechanism 16 are lowered as shown in FIG. 3A, the ladle 6 is moved to the first position as shown in FIGS. 3A, 4B, and 4C. 2 Get on the ladle cart 5b. In this state, the second ladle trolley 5b moves away from the ladle storage mechanism 16 by backing the passage 4c toward the turntable 4d as shown in FIG. 2 (B), and moves along the passage 4c. It can move in the direction and carry the ladle 6 (see the flow line indicated by reference numeral 64 in FIG. 5). Next, the second ladle trolley 5b is turned 180 degrees on the turntable 4d, and the passage 4e is moved to the next stage (for example, a vacuum degassing facility as a secondary smelting furnace, as shown in FIGS. 1B and 2A). Proceed to 3) (hereinafter also simply referred to as “RH”). In “RH”, the ladle 6 placed on the second ladle cart 5b is deposited in the ladle storage mechanism 16 and processed in “RH” in the same manner as described above in relation to “LF”. back passage 4e, redirected turntable 4d, and progress in the arrow 56 direction through the passage 4c in the front a lack portion 30 provided in the traveling side of the ladle truck as in FIG. 1 (B), Prepare to receive the next ladle 6 near “LF” (see the flow line indicated by reference numeral 65 in FIG. 5).

Next, after the predetermined process is completed in “RH” (see the flow line indicated by reference numeral 66 in FIG. 5), a completely different third ladle cart 5c (FIG. 1 (B) ) And FIG. 2) receive the ladle 6 after the completion of the processing in “RH” in the same manner as described above in relation to “LF”, up to the position shown in FIG. 1 (B) and FIG. Return (refer to the flow line indicated by reference numeral 67 in FIG. 5). Here, the ladle 6 is carried away by a crane.
In the above explanation, in explaining the flow related to the refining work centered on one ladle 6, the examples using the first ladle trolley 5a to the third ladle trolley 5c have been explained. As shown in FIG. 2, the ladle 6 that requires refining is repeatedly carried on the first ladle cart 5a located on the turntable 4a in FIGS. 1 and 2, and the above operations are repeated. It is.

By adopting such a ladle refining method, the ladle cart 5a and the ladle cart 5b can be operated efficiently even in a limited and narrow site as is apparent from FIGS. As shown in FIG. 5, the ladle refining apparatus has a short downtime, and the ladle can be refined continuously and efficiently.
In the description of the figure, the configuration used in relation to “RH” is the configuration described in the technical matters related to the configuration of “LF” described in FIGS. For technical matters that can be considered to be the same in terms of functions and the like, the same reference numerals as those described above are assigned, and redundant descriptions are omitted.

These are the top views which show the positional relationship of the ladle refining apparatus and vacuum degassing equipment (RF) in an out-of-furnace refining equipment, (A) is the state without the ladle cart 5, (B) is the ladle cart 5 Shows the state of placement. (A) and (B) are front schematic diagrams for explaining the positional relationship among a ladle refining device, a vacuum degassing facility, a ladle carriage 5 and a ladle 6 in an out-of-furnace refining facility. (A) and (B) are partially broken front views for explaining the positional relationship among the ladle storage mechanism 16, the ladle cart 5, and the ladle 6. (A) and (B) are plan views for explaining the relative positions between before and after placing the ladle 6 on the ladle carriage 5. (C) The figure is the front view seen from the right side of (B) figure, Comprising: It is a front view for demonstrating the relationship between the ladle trolley 5, the ladle 6, and the ladle custody mechanism 16. FIG. These show the cycle time table for demonstrating the relationship between the ladle trolley | bogie 5, the ladle refining apparatus 2, and the vacuum degassing equipment of a prior art example and a present Example.

DESCRIPTION OF SYMBOLS 1 ... Out-of-furnace refining equipment, 2 ... Ladle refining equipment (LF), 3 ... Vacuum degassing equipment, 4 ... Ladle movement route, 5 ... Ladle cart, 6. -Ladle, 10 ... heating device, 11 ... furnace lid, 12 ... electrode, 14 ... space, 16 ... ladle storage mechanism, 17 ... device installation location (pit), DESCRIPTION OF SYMBOLS 18 ... Support means, 19 ... Base frame, 20 ... Guide means, 21 ... Vertical drive device, 22 ... Receiving member, 23 ... Receiving part, 24 ... Member to support , 25 ... Underframe, 26 ... Wheel, 27 ... Drive control section, 28 ... Ladle mounting area, 29 ... Receiving member through-hole, 30 ... Escape part for escape 32 ... Ladle support member, 33 ... Base part, 34 ... Tip part (engagement part), 38 ... Bath steel storage space, 39 ... Perimeter wall, 40 ... Bottom member , 41 ...・ Reinforcing member, 42... Hook hook, 43... Seat portion, 47... Vacuum degassing device (RH).

Claims (2)

The furnace lid to cover the ladle is equipped with an electrode to heat the bath steel in the ladle,
On the other hand, on the lower side of the furnace lid, there is a space in which the ladle mounted on the ladle cart can enter and exit,
Against the underside of the furnace cover, is positioned in a state that is moved upward by the receiving member mechanism deposit ladle the ladle, and the furnace lid and Futagi, collected by supplying power to the electrode In the ladle refining equipment that heats and refines the bath steel in the pot,
A ladle storage provided with a receiving member for receiving the ladle and support means for moving up and down while supporting the receiving member, below the space in which the ladle mounted on the ladle cart is accessible. Set up the mechanism,
On the other hand, around the space, the first ladle trolley and the second ladle trolley can be moved forward and backward, respectively , toward the space where the ladle mounted on the ladle trolley can enter and exit. a first passage of two even, with causing a second passage, and their first passage, the second passage, to freely reciprocate individually toward each said space Arrange the first ladle trolley and the second ladle trolley,
Each ladle mounting region in each of the first ladle cart and the second ladle cart is provided with a through hole for allowing the receiving member in the ladle storage mechanism to move up and down ,
Furthermore, on the lateral side of each through hole of each of the first ladle trolley and the second ladle trolley,
Receiving member or the support means with respect to the through hole in the ladle deposit mechanism is in a state of being above the upward movement, the lack portion for allowing out from the side respectively allowed comprising,
In a state where the ladle is received by the receiving member in the ladle storage mechanism, a first ladle cart disposed in the first passage and a second passage are disposed below the ladle. Each of the second ladle carts can be moved forward and backward individually, and can move freely in a direction away from the ladle storage mechanism with the first passage and the second passage directed sideways. A ladle refining device characterized by being made possible .
The furnace lid to cover the ladle is equipped with an electrode to heat the bath steel in the ladle,
On the other hand, on the lower side of the furnace lid, there is a space in which the ladle mounted on the ladle cart can enter and exit,
The ladle is positioned in a state where it is moved up by the receiving member of the ladle storage mechanism with respect to the lower side of the furnace lid, the furnace lid is covered, and power is supplied to the electrode to take it out. In the ladle refining method that heats and refines the bath steel in the pot,
A ladle storage provided with a receiving member for receiving the ladle and support means for moving up and down while supporting the receiving member, below the space in which the ladle mounted on the ladle cart is accessible. Set up the mechanism,
On the other hand, around the space, the first ladle trolley and the second ladle trolley can be moved forward and backward, respectively, toward the space where the ladle mounted on the ladle trolley can enter and exit. Are provided with two first passages and a second passage, and the first passage and the second passage each have a second reciprocating motion freely toward the space. Arrange the ladle cart of 1 and the second ladle cart,
Each ladle mounting region in each of the first ladle cart and the second ladle cart is provided with a through hole for allowing the receiving member in the ladle storage mechanism to move up and down,
Furthermore, on the lateral side of each through hole of each of the first ladle trolley and the second ladle trolley,
The receiving member or the supporting means in the ladle storage mechanism in the above-described upward movement state is provided with a lacking part for allowing access from the side to the through hole, respectively.
In the heating and refining, a ladle containing bath steel is placed on the first ladle trolley, and the first passage is formed in front of the lacking portion provided on the traveling side of the first ladle trolley. Pass the first ladle trolley into the space above,
Raise the support means and receiving member of the ladle custody mechanism, raise the ladle, cover the furnace lid, supply power to the electrode, and heat refining the bath steel in the ladle, The first ladle trolley comes out of the space, operates freely toward the side through the first passage,
After completion of the heating and refining treatment, the first ladle trolley has already been removed from the space, and therefore, the missing portion provided on the traveling side of the second ladle trolley is passed through the second passage into the space. Put the second ladle trolley,
Lowering the support means and receiving member of the ladle storage mechanism and placing the ladle on the second ladle carriage,
A ladle refining method characterized in that the second ladle trolley is moved back to the second passage and moved laterally along the second passage to carry the ladle toward the next stage. .

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