JP6966386B2 - Continuous casting equipment - Google Patents

Description

The present invention relates to a continuous casting facility.

Conventionally, there is known a continuous casting facility that continuously casts by pouring molten steel into a mold from above and pulling out the slabs molded in the mold downward from the mold. In such a continuous casting facility, a mold is installed so as to be embedded in the casting floor, a tundish is placed at a casting position above the mold, and molten steel is placed above the tundish. The pot is placed.

The tundish is a container that receives the molten steel supplied from the ladle, and the received molten steel is temporarily retained and poured into the space inside the mold. Once the tundish has been used for casting for a given period of time, it will need to be maintained. When the maintenance time has come, the tundish is transported to a position away from the casting position for maintenance. During maintenance of this tundish, there is a non-operating time of the continuous casting equipment.

Further, in the operation of the continuous casting equipment, the steel grade to be cast may be changed in the middle, and even when the steel grade is changed, the non-operating time of the continuous casting equipment is conventionally generated. Specifically, when the steel grade is changed, the work of finishing the casting of the previous steel grade and replacing the tundish, the work of inserting a dummy bar in the mold to start the casting of the new steel grade after the change, etc. This causes non-operating time of the continuous casting equipment. The dummy bar closes the lower opening in the mold so as to prevent the molten steel from flowing downward from the mold at the start of casting, and the slab is used to pull out the slab molded in the mold downward. It is sent to the downstream side by the feeding device as a leader of the above.

Some of the continuous casting facilities are provided with a configuration for suppressing the non-operating time caused by the maintenance of the tundish and the change of the steel type to be cast. For example, in a continuous casting facility that suppresses non-operating time caused by maintenance of a tundish, a maintained tundish other than the tundish used for casting is kept on standby at the casting position for casting. When the maintenance time of the tundish at the position comes, the tundish is moved from the casting position and another waiting tundish is placed at the casting position to reduce the period when there is no tundish at the casting position. ing. In addition, in a continuous casting facility that suppresses non-operating time caused by a change in steel grade, a tundish different from the tundish used for casting is made to stand by at the casting position during casting of the steel grade before the change. When the casting of the steel grade before the change was completed, the pouring into the mold was stopped and the tundish at the casting position was quickly replaced with another waiting tundish and placed at the new casting position. By pouring molten steel of the new steel grade from the tundish into the mold, it is possible to connect to the slab of the steel grade before the change and pull out the slab of the new steel grade from the mold. Therefore, it is not necessary to insert the dummy bar into the mold in order to start casting the changed steel grade, and the period required for inserting the dummy bar is reduced.

Specifically, the continuous casting equipment for suppressing the non-operating time as described above includes two tundish cars capable of self-propelling on the cast floor by mounting different tundish. When placing the other tundish in the standby position in the casting position instead of one in the casting position, the one tundish car equipped with that one tundish moves from the casting position. While retreating one tundish, the other tundish car moves to place the other tundish in the standby position at the casting position. In this way, one tundish in the casting position and the other tundish in the standby position are exchanged.

The following Patent Document 1 discloses an example of a tundish car used in the above-mentioned continuous casting equipment. On the tundish car of Patent Document 1, a stand as a work deck that moves together with the tundish car when the tundish car moves on the cast floor is provided. This platform is located at a height that roughly coincides with the top edge of the tundish mounted on the tundish car. Further, the tundish car is provided with a staircase for going up and down from the cast floor to the table.

Japanese Patent No. 4672026

In the configuration of the above-mentioned Patent Document 1, when the molten steel leaks from the tundish at the casting position, there is a possibility that the worker on the table as the work deck cannot evacuate from the table.

Specifically, in Patent Document 1, since the stairs for going up and down on the table are provided in the tundish car, the stairs move together with the tundish car. Therefore, when the tundish car is in the position where the tundish is placed in the casting position, the stairs are located in the vicinity of the casting position. At this time, if the stairs are descended from the table, the stairs will be lowered to the cast floor near the casting position, but the molten steel leaking from the tundish will be scattered on the cast floor near the casting position, so that the operator Can't get off. Therefore, the worker cannot evacuate from the table provided in the tundish car.

Further, the configuration of Patent Document 1 is inconvenient for the operator.

Specifically, at the casting position, the operator often rides on the table and performs the work above the tundish or below the ladle, but since the temperature near the casting position becomes high, the operator It is not possible to stay on the table located near the casting position, and each time the work is performed, the stairs must be climbed up and down and reciprocated between the table and the casting floor.

Further, although various materials are required for the work, since the space on the table provided in the tundish car is generally small, such materials are placed on the table. It is difficult to keep it due to space constraints. Therefore, each time the work is performed, the material must be carried from the cast floor to the table by climbing the stairs.

Further, in the standby position where the tundish is made to stand by before being placed in the casting position, various operations for preheating the tundish are performed, and at this time as well, the stairs are climbed to access the table. There is a need. Then, when the tundish car moves to transport the tundish from the standby position to the casting position, it is difficult to stay on the table. Therefore, the operator casts from the table after the work in the standby position. After going down the stairs to the built-in floor and moving the tundish car, walk on the cast floor to the vicinity of the casting position and climb the stairs of the tundish car again to work at the casting position. You need to go up to the table.

From the above, in the configuration of Patent Document 1, the number of times the worker goes up and down the stairs increases, which is inconvenient for the worker.

An object of the present invention is to provide a continuous casting facility that allows a worker to evacuate from a deck provided in a tundish car when molten steel leaks from the tundish at a casting position and is highly convenient for the worker. To provide.

Provided by the present invention is a continuous casting facility for continuously casting slabs. This continuous casting facility is installed under the casting floor, and a casting device for continuously forming the slab from the molten steel received through the casting port opened in the casting floor, and the molten steel are inserted. One of the ladle placed above the casting port and the molten steel placed above the casting port and below the ladle to receive molten steel from the ladle and the received molten steel. A first tundish and a second tundish for pouring hot water into the casting port, and a casting place where the first tundish is mounted and the mounted first tundish is arranged at the casting position. The first tundish is moved along a specific movement direction on the cast floor to and from the first waiting area where the first tundish is arranged at the first waiting position away from the casting position. The casting in which a first tundish car to be conveyed between the casting position and the first standby position and the second tundish are mounted, and the mounted second tundish is arranged at the casting position. In the moving direction on the cast floor between the loading area and the second waiting area where the second tundish is arranged at the second standby position, which is located on the opposite side of the first standby position from the casting position. A second tundish car that conveys the second tundish between the casting position and the second standby position by moving along the same, and a second tundish car that is installed on the first tundish car and on the first tundish car. A first tundish deck that allows workers to work, a second tundish deck that is installed on the second tundish car and allows workers to work on it, and the above. A first deck installed on the cast floor at a position on one side in an arrangement direction orthogonal to the movement direction with respect to the movement area of the first tundish car, and a first deck provided on the first deck. On the cast floor at a position on one side of the arrangement direction with respect to the moving area of the first staircase and the second tundish car, which allows an operator to go up and down between the cast floor and the cast floor. A second deck installed in the floor and a second staircase provided on the second deck and allowing an operator to go up and down between the second deck and the cast floor are provided. Then, the first deck is adjacent to the first tundish deck in the arrangement direction when the first tundish car is in the casting place, and the second tundish car is in the casting place. Sometimes the first deck casting adjacent portion adjacent to the second tundish deck in the arrangement direction and the first tundish in the arrangement direction when the first tundish car is in the first waiting area. It has a first deck standby adjoining portion adjacent to the deck, and the second deck is adjacent to the second tundish deck in the arrangement direction when the second tundish car is in the casting site. When the first tundish car is in the casting place, the second deck adjacent portion adjacent to the first tundish deck in the arrangement direction at the time of casting and the second tundish car are in the second standby. It has a second deck standby adjacent portion adjacent to the second tundish deck in the arrangement direction when it is in the field.

In this continuous casting facility, when molten steel leaks from the first tundish at the casting position, the worker on the first tundish deck moves from the first deck to the first from the first deck to the adjacent portion at the time of casting the first deck. Either descend to the casting floor at a position away from the casting position via the stairs, or cast at a position away from the casting position from the second deck through the second stairs across the adjacent part when casting the second deck. You can get off on the built-in floor. Further, when the molten steel leaks from the second tundish at the casting position, the operator on the second tundish deck can perform the first stairs in the same manner as when the molten steel leaks from the first tundish at the casting position. Alternatively, it is possible to descend onto the casting floor at a position away from the casting position via the second staircase. Therefore, even if the leaked molten steel is scattered on the casting floor near the casting position, the operator can avoid the scattered molten steel and evacuate from each tundish deck. Moreover, in this continuous casting facility, there are two evacuation routes from the first tundish deck and the second tundish deck, that is, the evacuation route to the first deck and the evacuation route to go down the first stairs and the second deck. It is possible to secure an evacuation route down the second stairs. Therefore, the safety of evacuation can be enhanced.

Further, in this continuous casting facility, the operator can perform the first or first operation until the work at the casting position or the first and second standby positions occurs, and when the first and second tundish cars are moved. It is possible to stand by on two decks, and when the movement of the first and second tundish cars is completed and it becomes necessary to perform the above work, the adjacent portion at the time of casting the first deck or the adjacent portion at the time of waiting at the first deck It is possible to cross over to the first or second tundish deck from the part, the adjacent part at the time of casting the second deck, and the adjacent part at the time of waiting for the second deck. That is, there is no need to go up and down the stairs at this time. In addition, the materials required for the work can be placed on the first and second decks, and it is not necessary to carry the necessary materials from the cast floor through the stairs each time the work is performed. From the above, this continuous casting facility is highly convenient for workers.

The casting device is a mold that surrounds a molding space extending downward from the casting port, and molds molten steel poured into the molding space through the casting port into the slab, and in the molding space. It has a feeding device for pulling the molded slab downward from the molding space and feeding the slab to the downstream side, and the continuous casting facility has a continuous casting facility before the start of pouring of molten steel into the molding space. A dummy bar inserted into the molding space through the casting port, which closes the opening at the lower part of the molding space so as to prevent the molten steel poured into the molding space from flowing downward from the molding space. A device connected to the lower end of the slab so that the slab is pulled out from the molding space as the dummy bar is fed to the downstream side by the feeder, and the casting after being fed by the feeder. The first deck and the said The second decks are preferably spaced apart from each other so as to allow an entry space between the dummy barkers to allow the dummy barkers to enter to convey the dummy bar to the insertion position.

By doing so, the first and second decks enhance the convenience of the operator, and the dummy bar separated from the slab can be conveyed to the insertion position and inserted into the molding space in the mold from above. realizable. Further, when the dummy barker has not entered the approach space, the entry space can be used as a space for accessing the underfloor feeding device of the cast floor from above for maintenance or the like. Therefore, for example, the underfloor feeding device can be accessed from above through the approach space by an overhead crane for exchanging the components of the feeding device.

In the configuration including the dummy bar and the dummy barker, the first tundish deck, the second tundish deck, the first deck, and the second deck each have a boarding surface on which an operator rides. It is preferable that the boarding surface of the first tundish deck, the boarding surface of the second tundish deck, the boarding surface of the first deck, and the boarding surface of the second deck are located at the same height.

By doing so, when the worker goes back and forth between the boarding surface of the first tundish deck and the boarding surface of the first deck, the boarding surface of the first tundish deck and the boarding surface of the second deck When going back and forth between the boarding surface of the 2nd tundish deck and the boarding surface of the 2nd deck, and on the boarding surface of the 2nd tundish deck and the boarding surface of the 1st deck. You can make it harder to stumble when you come and go. In the present invention, the concept that the boarding surfaces of the decks are located at the same height is not necessarily limited to the boarding surfaces of the decks being located at exactly the same height, and the operator can walk normally. It is a concept that allows a slight height difference between the boarding surfaces of both decks so that it can move from the boarding surface of one deck to the boarding surface of the other deck adjacent to the deck without any trouble.

Further, in this case, both the first tundish and the second tundish have an opening on the upper side, and the continuous casting facility is applied to the first tundish so as to cover the opening on the upper side of the first tundish. The boarding surface of the first tundish deck is further provided with a first tundish cover to be covered and a second tundish cover to be covered on the second tundish so as to cover the upper opening of the second tundish. Is preferably located at the same height as the upper surface of the first tundish cover, and the boarding surface of the second tundish deck is preferably located at the same height as the upper surface of the second tundish cover.

When the first tundish is waiting in the first standby position, the work to be performed on the first tundish cover occurs, but according to this configuration, the worker can work on the first tundish cover. When moving from the boarding surface of the first deck to the upper surface of the first tundish cover via the boarding surface of the first tundish deck, and vice versa, the first deck and the first tongue In addition to the boundary between the dish decks, the boundary between the first tundish deck and the first tundish cover can also make it difficult to stumble. Similarly, when the second tundish is waiting in the second standby position, the work to be performed on the second tundish cover occurs, but the worker is required to perform the work on the second tundish cover. When moving from the boarding surface of the 2 deck to the upper surface of the 2nd tundish cover via the boarding surface of the 2nd tundish deck, and vice versa, the 2nd deck and the 2nd tundish In addition to the boundary between the decks, the boundary between the second tundish deck and the second tundish cover can also make it difficult to stumble. In the present invention, the concept that the boarding surface of the tundish deck is located at the same height as the upper surface of the tundish cover is that the boarding surface of the tundish deck and the upper surface of the tundish cover are located at exactly the same height. The boarding surface and the upper surface thereof are not necessarily limited to the above, and the operator can move from one of the boarding surface of the tundish deck and the upper surface of the tundish cover to the other without any trouble by normal walking. Height deviation is an acceptable concept.

The first deck has a first floor board that allows an operator to ride on it, and at least one first support column that is erected on the cast floor and supports the first floor board from below. The second deck has a second floor board that allows an operator to ride on it, and at least one second support column that is erected on the cast floor and supports the second floor board from below. The first floor plate has a first overhanging portion that projects from the first strut closest to the entry space to the entry space side among the at least one first strut and constitutes an adjacent portion at the time of casting the first deck. The second floor plate has a second floor plate that projects from the second support column closest to the entry space among the at least one second support column toward the entry space side to form an adjacent portion when the second deck is cast. It is preferable to have a protrusion.

According to this configuration, the first overhanging portion and the second overhanging portion form adjacent portions at the time of casting the first and second decks, and there is a first tundish car or a second tundish car at the casting site. The access route between the tundish deck on the tundish car and the first and second decks can be secured, and for example, in the dummy barker, below the first and second overhangs. The position of the bogie is used as a bogie, and the bogie is made wider than the entry space to ensure the stability of the dummy barker, while both sides of the bogie in the width direction are the first and second overhanging parts. It is possible to enter the space below and avoid interference with the first and second decks. Further, according to this configuration, a large space can be secured below the first and second overhangs, so that the space can be used to access the underfloor feeding device of the cast floor during maintenance of the feeding device. Ease can be improved.

The continuous casting facility is attached to at least one of the first deck and the second deck, and the feeding speed of the slab by the feeding device and the injection of molten steel from the first tundish to the casting port. It further comprises at least one operating device operated to regulate at least one of the hot water flow rate and the pouring flow rate of the molten steel from the second tundish to the casting port, the at least one said operation. The device is located at a position within the entry space of the dummy barker between the first deck and the second deck, at an operation position where the operation device is operated, and at a position outside the entry space of the dummy barker. It is preferable that the operating device is attached to at least one of the decks so as to be movable between the operating device and the retracted position where interference between the dummy barker is avoided.

When the operator operates the operating device, the feeding speed of the slab by the feeding device, the flow rate of molten steel pouring from the first tundish to the casting port, or the pouring of molten steel from the second tundish to the casting port. When adjusting the flow rate, it is necessary to adjust it while observing the state of the molten steel at the casting port, so it is desirable that the operating device is near the casting port, but the vicinity of the casting port is a dummy barker. Since it is in the approach space, if there is an operating device near the casting port, interference with the dummy barker becomes a problem. On the other hand, according to this configuration, the operator can feed the slab by the feeding device, the pouring flow rate of the molten steel from the first tundish to the casting port, or the molten steel from the second tundish to the casting port. When operating the operating device to adjust the pouring flow rate, the dummy barker has not entered the entry space between the first deck and the second deck because it is during casting, and the operating device is in that state. Can be brought closer to the casting port by arranging the above-mentioned operating position, and the above-mentioned adjustment can be easily performed while observing the state of the molten steel at the casting port. Further, when the dummy barker enters the approach space in order to convey the dummy bar to the insertion position, the operation device can be arranged in the retracted position to avoid interference between the operation device and the dummy barker. Therefore, in this configuration, while avoiding interference between the operating device and the dummy barker, the operator observes the state of the molten steel at the casting port, the feed rate of the slab, and the molten steel from the first tundish to the casting port. It is possible to easily adjust the pouring flow rate of the molten steel or the pouring flow rate of the molten steel from the second tundish to the casting port.

The continuous casting facility is installed on the casting floor on the side opposite to the first deck with the first waiting area interposed therebetween, and when the first tundish is waiting at the first waiting position, the first The first heating device for heating one tundish and the second tundish are installed on the cast floor on the opposite side of the second waiting area with the second waiting area in between, and the second tundish stands by at the second waiting position. It is preferable to further include a second heating device that heats the second tundish while it is being used.

According to this configuration, the first tundish waiting in the first standby position can be heated by the first heating device, and the second tundish waiting in the second standby position can be heated by the second heating device. Can be heated by. Therefore, when the first tundish is moved from the first standby position to the casting position and the molten steel is poured into the first tundish from the ladle, the molten steel solidifies in the first tundish. When the second tundish is moved from the second standby position to the casting position and the molten steel is poured into the second tundish from the ladle, the molten steel is in the second tundish. You can prevent it from solidifying. Further, in this configuration, since the first heating device is on the opposite side of the first waiting area from the first deck, it is possible to prevent the space on the first deck side, which is the work place, from being occupied by the first heating device. Can be done. Further, if the first heating device is installed in a place beyond the first deck from the first waiting area, heat is supplied from the first heating device to the first tundish in the first standby position. For example, the arm-shaped supply means is crossed over the first deck to reach the first tundish, which interferes with the worker on the first deck. On the other hand, in this configuration, since the first heating device is on the opposite side of the first deck across the first waiting area, it is possible to avoid the heat supply means as described above crossing over the first deck. .. Further, in this configuration, since the second heating device is on the opposite side of the second waiting area with the second waiting area in between, the space on the second deck side, which is the work place, is used for the same reason as in the case of the first heating device. Can be prevented from being occupied by the second heating device, and the heat supply means can be prevented from crossing over the second deck.

As described above, according to the present invention, when molten steel leaks from the tundish at the casting position, the worker can evacuate from the deck of the tundish car, and the continuous operation is highly convenient for the worker. Can provide casting equipment.

It is a schematic vertical sectional view of the continuous casting equipment by one Embodiment of this invention. It is a schematic plan view of the continuous casting equipment according to one embodiment of the present invention, in which the first and second tundish cars are located in the respective waiting areas during non-casting, and the first and second tundish are in the respective waiting areas. It is a figure which shows the continuous casting equipment in the state which was arranged in a position. It is sectional drawing of the continuous casting facility along the line III-III in FIG. It is a side view of the 2nd deck side of the continuous casting facility shown in FIG. The first tundish car moves to the casting site and the first tundish is placed in the casting position, the second tundish car is located in the second waiting area, and the second tundish is in the second waiting position. It is a schematic plan view of the continuous casting facility in a standby state. It is sectional drawing of the continuous casting facility along the VI-VI line in FIG. However, in FIG. 6, the first operating device and the second operating device are omitted. It is sectional drawing of the continuous casting equipment along the line VII-VII in FIG. The second tundish car is moved to the casting site and the second tundish is placed in the casting position, the first tundish car is located in the first waiting area, and the first tundish is in the first waiting position. It is a schematic plan view of the continuous casting facility in a standby state. It is sectional drawing of the continuous casting equipment along the IX-IX line in FIG. However, in FIG. 9, the first and second tundish cars and the first and second tundish mounted on those tundish cars are omitted. It is a schematic plan view of the continuous casting facility in the state where the dummy barker conveys the dummy bar to the insertion position. It is sectional drawing of the continuous casting equipment along the XI-XI line in FIG. It is a figure for demonstrating the structure of the heating apparatus which heats a tundish arranged in a standby position in a continuous casting facility.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 and 2 show the overall configuration of the continuous casting facility 1 according to the embodiment of the present invention. The continuous casting equipment 1 according to the present embodiment is an equipment for continuously casting slabs from molten steel. The continuous casting facility 1 includes a casting device 2, a plurality of ladle 6, a ladle turret 8, a plurality of tundish 10, a first tundish car 12, a first tundish deck 13, and a second. It includes a tundish car 14, a second tundish deck 15, a dummy bar 16, a dummy barker 18, a first deck 20, and a second deck 21.

The casting device 2 is a device for forming a slab from molten steel, and is installed under the casting floor 100. The casting device 2 continuously forms slabs from molten steel received through a casting port 101 opened in the casting floor 100. The casting device 2 has a mold 3, a cooling device (not shown), and a feeding device 4.

The mold 3 is a mold for molding slabs from molten steel. The mold 3 is embedded from the vicinity of the floor surface (upper surface) of the casting floor 100 to under the floor so as to surround the molding space extending downward from the casting port 101. The mold 3 molds molten steel poured into a molding space into a slab through a casting port 101 which is an opening at the upper end thereof. Further, the lower end of the mold 3 is open so that the slab molded in the molding space in the mold 3 can be pulled out below the mold 3.

The cooling device (not shown) cools the mold 3 in order to solidify the molten steel poured into the mold 3, and is provided under the casting floor 100.

The feeding device 4 is installed under the floor of the casting floor 100, and is a device for pulling out the slabs molded in the molding space in the mold 3 downward from the molding space and feeding the slabs to the downstream side. Specifically, under the floor of the casting floor 100, a feed passage 102 connected to the molding space in the mold 3 is configured, and the feed device 4 draws the slabs drawn from the molding space in the mold 3 into the feed passage. It is sent to the downstream side through 102.

The feed passage 102 includes a region extending directly below from the lower end of the molding space in the mold 3, a region extending downward from the lower end of the region and gradually curved toward the horizontal direction, and a curved region thereof. It has a region extending horizontally from the rear end away from the mold 3. The feeding device 4 has a plurality of feeding rollers 22 arranged on both sides of the feeding passage 102 and arranged at intervals along the direction in which the feeding passage 102 extends. Further, the feed device 4 includes a roll stand (not shown) that rotatably supports the feed roller 22 around its axis, and some feed rollers 22 among the plurality of feed rollers 22 included in the feed device 4. It has a roller drive device (not shown) that is rotationally driven. In the feed device 4, the slab is sandwiched from both sides by a plurality of feed rollers 22, and the feed roller 22 is rotated by the roller drive device so as to feed the slab to the downstream side (the side away from the mold 3) of the feed passage 102. Let me.

The ladle 6 is a container in which molten steel, which is a material for casting, is placed. In the continuous casting facility 1 of the present embodiment, the ladle nozzle 24 for pouring the molten steel filled in the ladle 6 into the tundish 10 and the molten steel from the ladle 6 through the ladle nozzle 24 are provided. It is provided with a slide valve (not shown) provided in the ladle 6 for controlling the availability of discharge and the discharge flow rate. The ladle nozzle 24 is detachably attached to the bottom of the ladle 6. Since the opening degree of the slide valve is controlled by the hydraulic pressure, a hydraulic hose (not shown) is connected to the slide valve.

The ladle turret 8 is a device for replacing the ladle 6 at the pouring position A (see FIG. 2) with another ladle 6 at the ladle standby position B. The pouring position A is a position where the ladle 6 is arranged so that the molten steel is poured from the ladle nozzle 24 to the tundish 10, and is a position above the casting port 101. This pouring position A is a position above the tundish 10 arranged at the casting position D described later. The ladle standby position B is a position where a ladle 6 different from the ladle 6 in which molten steel is poured into the tundish 10 and which is filled with molten steel stands by. The ladle turret 8 is filled with molten steel when the ladle 6 is emptied by pouring the molten steel in the ladle 6 arranged at the pouring position A into the tundish 10. It is configured to replace another ladle 6 arranged at the ladle standby position B.

Specifically, the ladle turret 8 is provided with an arm 8a that extends in the horizontal direction and has a portion that holds a ladle 6 at one end and the other end, respectively. The arm 8a is rotatable about a vertical axis passing through a central position C between one end and the other end. The ladle turret 8 arranges the ladle 6 held by one end of the arm 8a at the pouring position A, and another ladle 6 filled with molten steel at the ladle standby position B by the other end of the arm 8a. By holding and rotating the arm 8a 180 degrees when the ladle 6 at the pouring position A is empty, the empty ladle 6 is moved to the ladle standby position B and the molten steel is filled. Another ladle 6 is moved to the pouring position A. In this way, every time the ladle 6 at the pouring position A is emptied, it is replaced with another ladle 6 filled with molten steel, so that the molten steel can be continuously poured into the tundish 10 at the casting position D. It has become like.

The tundish 10 is a container for receiving the molten steel poured from the ladle 6 at the casting position D and temporarily retaining the molten steel to precipitate and remove inclusions in the molten steel. Further, the tundish 10 is configured to pour the received molten steel into the casting port 101. The tundish 10 has a tundish main body 30 having an opening on the upper side to receive molten steel, and a tundish cover 31 covering the tundish main body 30 so as to cover the upper opening of the tundish main body 30. The tundish cover 31 is provided with a through hole. The ladle nozzle 24 is inserted into the space inside the tundish 10 through this through hole.

Further, the continuous casting facility 1 of the present embodiment has a tundish nozzle 26 for pouring molten steel received by the tundish 10 from the tundish 10 into a molding space in the mold 3 through a casting port 101, and a tongue thereof. It is provided with a slide valve (not shown) provided in the tundish 10 for controlling the pouring ability of molten steel and the pouring flow rate through the dish nozzle 26. The tundish nozzle 26 is detachably attached to the bottom of the tundish 10.

The casting position D is a position below the ladle 6 arranged at the pouring position A and above the mold 3 (above the casting port 101). More specifically, at the casting position D, the nozzle 24 of the ladle 6 arranged at the pouring position A is inserted into the space inside the tundish 10, and the nozzle 26 of the tundish 10 is cast. This is the position where the mold 3 is inserted into the molding space through the mouth 101.

If the tundish 10 is used for casting at the casting position D for a certain period of time, the tundish nozzle 26 may be damaged or other problems may occur, so that regular maintenance is required. At the time of maintenance of the tundish 10, the tundish 10 at the casting position D is replaced with another tundish 10. In addition, in the operation of continuous casting equipment, the type of steel to be cast may be changed on the way. When the steel type is changed, the tundish 10 used for casting at the casting position D before the change is replaced with another tundish 10.

Therefore, the continuous casting facility 1 of the present embodiment includes a plurality of tundish 10. Then, when the maintenance time of the tundish 10 used for casting at the casting position D comes, the tundish 10 is moved from the casting position D for maintenance, and the maintenance has been completed in place of the tundish 10. Another tundish 10 is placed at the casting position D to continue casting. Further, when the steel type to be cast is changed, the casting of the steel type up to that point is stopped, and the tundish 10 used for casting at the casting position D is moved from the casting position D, while another tundish 10 is used. Is placed at the casting position D to start casting the changed steel grade. As shown in FIG. 2, the plurality of tundish 10s included in the continuous casting facility 1 include a first tundish 10a mounted on the first tundish car 12 and a second tundish 10 mounted on the second tundish car 14. Tundish 10b and the like are included.

The first tundish car 12 is a device for transporting the mounted first tundish 10a between the casting position D and the first standby position E. The first standby position E is a position where the first tundish 10a before being arranged at the casting position D waits. The first standby position E is a position away from the casting position D along a specific moving direction D1 along the upper surface of the casting floor 100.

When the maintenance time of the first tundish 10a used for casting at the casting position D comes, the first tundish 10a is transported from the casting position D to the first standby position E by the first tundish car 12. However, it is further transported from the first standby position E to the work place for performing maintenance work by a crane or the like. Further, the maintained first tundish 10a is mounted on the first tundish car 12 in the first standby position E and stands by, and when used for casting, the first tundish car 12 moves to the casting position D. It is designed to be transported.

The first tundish car 12 is equipped with the first tundish 10a and is a casting floor along a specific moving direction D1 along the upper surface of the casting floor 100 between the casting site 104 and the first waiting area 106. Move over 100. The casting place 104 is a place on the casting floor 100 provided with the casting port 101 (mold 3), and the first tundish car 12 equipped with the first tundish 10a is placed on the casting place 104. By locating, the first tundish 10a is arranged at the casting position D.

The first waiting area 106 is a place on the cast floor 100 in which the first tundish 10a mounted on the first tundish car 12 located above the first waiting area 106 is arranged at the first waiting position E. The first tundish car 12 conveys the first tundish 10a between the casting position D and the first waiting position E by moving between the casting place 104 and the first waiting place 106.

The second tundish car 14 is a device for transporting the mounted second tundish 10b between the casting position D and the second standby position F. The second standby position F is a position where the second tundish 10b before being arranged at the casting position D waits. The second standby position F is a position separated from the casting position D on the side opposite to the first standby position E along the movement direction D1 along the upper surface of the casting floor 100.

When the maintenance time of the second tundish 10b used for casting at the casting position D comes, the second tundish 10b is transported from the casting position D to the second standby position F by the second tundish car 14. Then, it is further transported from the second standby position F to the work place for performing maintenance work by a crane or the like. Further, the maintained second tundish 10b is mounted on the second tundish car 14 in the second standby position F and stands by, and when used for casting, the second tundish car 14 moves to the casting position D. It is designed to be transported. In the present embodiment, when the first tundish 10a is arranged at the casting position D and used for casting (see FIG. 5), the second tundish 10b stands by at the second standby position F, and vice versa. Further, when the second tundish 10b is arranged at the casting position D and used for casting (see FIG. 8), the first tundish 10a stands by at the first standby position E. ..

The second tundish car 14 mounts the second tundish 10b and moves on the casting floor 100 along the moving direction D1 between the casting field 104 and the second waiting area 108. The second tundish car 14 equipped with the second tundish 10b is located on the casting site 104, so that the second tundish 10b is arranged at the casting position D. The second waiting area 108 is a place on the cast floor 100 in which the second tundish 10b mounted on the second tundish car 12 located above the second waiting area 108 is arranged at the second waiting position F. The second tundish car 14 conveys the second tundish 10b between the casting position D and the second waiting position F by moving between the casting place 104 and the second waiting place 108.

On the cast floor 100 passing through the first waiting area 106, the casting site 104, and the second waiting area 108, a pair of rails 110 on which the first and second tundish cars 12 and 14 ride are laid. There is. The pair of rails 110 extend linearly in the moving direction D1, in other words, in the direction connecting the first standby position E, the casting position D, and the second standby position F.

The first and second tundish cars 12 and 14 have the same configuration, and as shown in FIG. 1, have a tundish car main body 32 and a plurality of wheels 33, respectively. The tundish car main body 32 is for holding the tundish 10 on which the tundish 10 is placed. The wheels 33 are provided on the bottom of the tundish car body 32 and are mounted on a pair of rails 110. The tundish car main body 32 is provided with a drive device (not shown) for rotationally driving each wheel 33. As each wheel 33 rotated by this drive device rolls on the rail 110, the first and second tundish cars 12 and 14 move in the moving direction D1 along the pair of rails 110. The tundish 10 is to be transported.

The first tundish deck 13 is for an operator to ride on the first tundish deck 13 and perform various operations related to the first tundish 10a and the ladle 6. The work performed on the first tundish deck 13 is, for example, opening work of the ladle nozzle 24, temperature measurement work of molten steel in the first tundish 10a, attachment / detachment work of the ladle nozzle 24 to the ladle 6, and ladle 6 It is the work of connecting the hydraulic hose to the slide valve provided in. The first tundish deck 13 is installed on the tundish car main body 32 of the first tundish car 12, and moves together with the first tundish car 12 as the first tundish car 12 moves. ..

The first tundish deck 13 is configured to substantially surround the periphery of the first tundish 10a mounted on the first tundish car 12. Further, the first tundish deck 13 has a boarding surface on which the worker rides. Specifically, the first tundish deck 13 has a floor plate 13a (see FIG. 1) arranged substantially horizontally, and the upper surface of the floor plate 13a is a boarding surface. The upper surface (boarding surface) of the floor plate 13a is located at the same height as the upper surface of the tundish cover 31 of the first tundish 10a mounted on the first tundish car 12. The floor plate 13a is arranged adjacent to the tundish cover 31 so that an operator can come and go between the upper surface thereof and the upper surface of the tundish cover 31 of the first tundish 10a. In order to prevent the operator from stumbling, it is preferable that the upper surface of the floor plate 13a is located at exactly the same height as the upper surface of the tundish cover 31, but the upper surface of the floor plate 13a is preferably located by the operator during normal walking. A slight height deviation is allowed so that the top and the top surface of the tundish cover 31 can be moved from one of them to the other without any trouble.

Further, the first tundish deck 13 has a plurality of handrail fences 13b for preventing the worker from falling from the floor plate 13a. A pair of end handrail fences 13c provided at both ends of the floor plate 13a in the moving direction D1 of the first tundish car 12 and a first tundish car 12 are cast in the plurality of handrail fences 13b. The entry space side handrail fence 13d provided at the end of the dummy barker 18 which will be described later facing the approach space 120 side when arranged at 104 is included. Each of these handrail fences 13c and 13d extends along the edge of the end of the floor plate 13a on which they are provided. The handrail fence 13d on the approach space side has no deck on the approach space 120 side of the first tundish deck 10a when the first tundish car 12 is arranged at the casting site 104, so that the approach space 120 side of the floor plate 13a By closing on the end of the floor plate 13a, the floor plate 13a is prevented from falling to the approach space 120 side.

An operator may pass between one end of the approach space side handrail fence 13d in the direction along the moving direction D1 of the first tundish car 12 and one end handrail fence 13c located on the one end side thereof. There is a possible space. Similarly, between the other end of the approach space side handrail fence 13d in the direction along the moving direction D1 of the first tundish car 12 and the other end handrail fence 13c located on the other end side. There is a space that workers can pass through.

The second tundish deck 15 is for an operator to get on the second tundish deck 15 and perform various operations related to the second tundish 10b and the ladle 6. The work performed on the second tundish deck 15 is the same as the work performed on the first tundish deck 13. The second tundish deck 15 is installed on the tundish car main body 32 of the second tundish car 14, and moves together with the second tundish car 14 as the second tundish car 14 moves. ..

The second tundish deck 15 is configured to substantially surround the periphery of the second tundish 10b mounted on the second tundish car 14. The configuration of the second tundish deck 15 is the same as the configuration of the first tundish deck 13. The second tundish deck 15 has a floor plate 15a arranged substantially horizontally, and an operator can ride on the upper surface of the floor plate 15a. That is, the upper surface of the floor plate 15a is the boarding surface of the worker. The upper surface of the floor plate 15a is located at substantially the same height as the upper surface of the tundish cover 31 of the second tundish 10b mounted on the second tundish car 14.

Further, the second tundish deck 15 has a plurality of handrail fences 15b similar to the plurality of handrail fences 13b of the first tundish deck 13. The plurality of handrail fences 15b include a pair of end handrail fences 15c and an entry space side handrail that are configured and arranged in the same manner as the pair of end handrail fences 13c and the entry space side handrail fence 13d of the first tundish deck 13. The fence 15d is included.

The dummy bar 16 (see FIGS. 1 and 10) is inserted into the molding space from above through the casting port 101 before the start of pouring the molten steel into the molding space in the mold 3, and the molten steel is poured into the molding space. At that time, the opening at the lower part of the molding space is closed so as to prevent the molten steel from flowing downward from the molding space. Further, the dummy bar 16 is connected to the lower end of a slab molded from molten steel in the molding space, and is fed downstream by the feeding device 4 in that state in order to pull the slab downward from the molding space. Contribute. The dummy bar 16 is composed of a large number of segments connected in a series, and the segments connected to each other are bendable so as to follow the curved shape of the feed passage 102 in the feed passage 102. It has become. The dummy bar 16 is fed from the downstream end of the feed passage 102 and then separated from the slab.

The dummy barker 18 is a device that conveys the dummy bar 16 separated from the slab to the insertion position 116 (see FIG. 10) that can be inserted into the molding space in the mold 3 from above again. The dummy barker 18 is equipped with a dummy bar 16 separated from the slab, and is a cast floor along the arrangement direction D2 described later, which is orthogonal to the moving direction D1 of the first and second tundish cars 12 and 14. Move over 100. The dummy barker 18 is located near the casting position D where the dummy bar 16 is arranged at the insertion position 116 where the front end of the dummy bar 16 is arranged on the casting port 101 from the position where the dummy bar 16 is mounted on the dummy barker 18. Move to.

On the cast floor 100, a pair of rails 112 for the dummy barker 18 are laid along a direction orthogonal to the moving direction D1 of the first and second tundish cars 12 and 14. The dummy barker 18 has a carriage portion 18b having wheels 18a mounted on the pair of rails 112, and a holding portion 18c provided on the carriage portion 18b to hold the dummy bar 16. As the wheels 18a of the carriage portion 18b roll on the rail 112, the dummy barker 18 moves along the rail 112 and conveys the dummy bar 16 as described above. The carriage portion 18b has a wider width than the holding portion 18c in the direction along the moving direction D1. Therefore, the bogie portion 18b protrudes from the holding portion 18c on both sides. Since the bogie portion 18b has a wide width as described above, the distance between the wheels 18a in the width direction of the bogie portion 18b can be increased, and the distance between the pair of rails 112 on which the wheels 18a ride can be increased. can. As a result, it is avoided that an obstacle such as a rail 112 or a beam that receives the rail 112 is arranged directly above the feed device 4.

In the first deck 20 and the second deck 21, the worker waits on the deck, or the evacuation route or the casting of the first tundish car 12 in the casting place 104 from the first tundish deck 13 at the time of casting. It constitutes an evacuation route from the second tundish deck 15 of the second tundish car 14 in the field 104. The first deck 20 and the second deck 21 are arranged on the opposite side of the ladle turret 8 with respect to the moving area of the first and second tundish cars 12, 14, and the first and second tundish cars 12, 14 It is arranged so as to be close to the moving area. The first deck 20 and the second deck 21 are installed side by side on the cast floor 100 along the moving direction D1 of the first and second tundish cars 12 and 14. Further, as shown in FIGS. 2 and 10, the first deck 20 and the second deck 21 of the first and second tundish cars 12 and 14 so as to have an entry space 120 of the dummy barker 18 between them. They are arranged apart from each other in the direction along the moving direction D1.

The first deck 20 is installed on the cast floor 100 at a position on one side in the arrangement direction D2 orthogonal to the moving direction D1 of the first tundish car 12 with respect to the moving area of the first tundish car 12. There is. The first deck 20 has a first deck casting adjacent portion 42 (see FIGS. 5 and 8) and a first deck standby adjacent portion 44.

The adjacent portion 42 at the time of casting the first deck is a worker between the first tundish deck 13 and the first deck 20 when the first tundish car 12 is in the casting place 104 (see FIG. 5). Adjacent to the first tundish deck 13 in the arrangement direction D2 so as to allow the traffic of the above. Further, the adjacent portion 42 at the time of casting the first deck is located between the top of the second tundish deck 15 and the top of the first deck 20 when the second tundish car 12 is in the casting field 104 (see FIG. 8). It is adjacent to the second tundish deck 15 in the arrangement direction D2 so as to allow the traffic of workers. Specifically, the adjacent portion 42 at the time of casting the first deck is the handrail fence 13d on the entry space side of the first tundish deck 13 in the arrangement direction D2 when the first tundish car 12 is in the casting field 104. Adjacent to the portion between the end of the first waiting area 106 side and the end handrail fence 13c on the first waiting area 106 side. Further, the adjacent portion 42 at the time of casting the first deck is the second of the handrail fence 15d on the entry space side of the second tundish deck 15 in the arrangement direction D2 when the second tundish car 14 is in the casting place 104. It is adjacent to the portion between the end on the waiting area 108 side and the end handrail fence 15c on the second waiting area 108 side.

The first deck standby adjoining portion 44 allows workers to come and go between the first tundish deck 13 and the first deck 20 when the first tundish car 12 is in the first waiting area 106. As described above, it is a portion adjacent to the first tundish deck 13 in the arrangement direction D2. The first deck standby adjacent portions 44 are provided at two locations separated from each other in the direction along the moving direction D1 of the first tundish car 12. Specifically, these two places adjacent to the first deck during standby 44 are the handrail fence 13d on the approach space side of the first tundish deck 13 when the first tundish car 12 is in the first waiting area 106. The part between one end of the handrail and the one end handrail fence 13c on the one end side, the other end of the entry space side handrail fence 13d, and the other end handrail fence 13c on the other end side. Adjacent to each.

The first deck 20 has a first floor plate 32 and two first columns 34.

The first floor plate 32 is on which an operator rides, and is arranged substantially horizontally at a position upward away from the cast floor 100. The first floor plate 32 extends along the moving direction D1 of the first and second tundish cars 12, 14. The first deck casting adjacent portion 42 and the first deck standby adjacent portion 44 are portions on the first floor plate 32, respectively. The first floor plate 32 has an upper surface (floor surface) on which an operator rides. The upper surface of the first floor plate 32 corresponds to the boarding surface of the first deck 20. The upper surface of the first floor plate 32 is located at substantially the same height as the upper surface of the floor plate 13a of the first tundish deck 13 (see FIGS. 6 and 7).

The two first columns 34 are erected on the cast floor 100 and support the first floor plate 32 from below. The two first columns 34 are arranged apart from each other along the moving direction D1 of the first tundish car 12 and are erected on the cast floor 100.

Further, the first floor plate 32 has a first overhanging portion 32a that projects from the first strut 34 closest to the approach space 120 of the dummy barker 18 to the approach space 120 side among the two first strut 34s. The first overhanging portion 32a constitutes the adjacent portion 42 at the time of casting the first deck. The space is located on the approach space 120 side of the first support column 34 closest to the entry space 120 and below the first overhanging portion 32a. A portion of the dummy barker 18 protruding toward the first support column 34 from the holding portion 18c in the width direction of the carriage portion 18b of the dummy barker 18 enters this space.

Further, the continuous casting facility 1 of the present embodiment includes a handrail fence 35 and a first staircase 36 provided on the first deck 20.

The handrail fence 35 is for preventing the worker from falling from the first floor plate 32 of the first deck 20. The handrail fence 35 is provided on the peripheral edge of the first floor plate 32 along the direction in which the edge thereof extends. This handrail fence 35 has a space on the adjacent portion 42 when casting the first deck, a space on the adjacent portion 44 when waiting for the first deck at two places, and a space to which the first stairs 36 are connected, and other than that. It is provided on the peripheral edge of the first floor plate 32.

The first staircase 36 is for going up and down between the first floor plate 32 of the first deck 20 and the cast floor 100. The first staircase 36 is provided at the end of both ends of the first floor plate 32 in the direction along the moving direction D1 of the first tundish car 12, which is far from the casting site 104, and is the first from the end. It is possible to descend to the side opposite to the moving area of the tundish car 12 (the side opposite to the first waiting area 106).

The second deck 21 is arranged at a position on the same side as the one side where the first deck 20 is provided with respect to the moving area of the first tundish car 12 with respect to the moving area of the second tundish car 14. It is installed on the cast floor 100. The second deck 21 has a second deck casting adjacent portion 46 and a second deck standby adjacent portion 48.

The second deck casting adjacent portion 46 allows workers to move between the second tundish deck 15 and the second deck 21 when the second tundish car 14 is at the casting site 104. As described above, it is adjacent to the second tundish deck 15 in the arrangement direction D2. Further, the adjacent portion 46 at the time of casting the second deck allows a worker to come and go between the first tundish deck 13 and the second deck 21 when the first tundish car 12 is in the casting place 104. Adjacent to the first tundish deck 13 in the arrangement direction D2 as permissible. Specifically, the adjacent portion 46 at the time of casting the second deck is the handrail fence 15d on the entry space side of the second tundish deck 15 in the arrangement direction D2 when the second tundish car 14 is in the casting field 104. Adjacent to the portion between the end of the second waiting area 108 side and the end handrail fence 15c on the second waiting area 108 side. Further, when the first tundish car 12 is in the casting place 104, the second deck adjacent portion 46 at the time of casting is the second of the handrail fence 13d on the entry space side of the first tundish deck 13 in the arrangement direction D2. It is adjacent to the portion between the end on the waiting area 108 side and the end handrail fence 13c on the second waiting area 108 side.

The second deck standby adjoining portion 48 allows workers to come and go between the second tundish deck 15 and the second deck 21 when the second tundish car 14 is in the second waiting area 108. As described above, it is a portion adjacent to the second tundish deck 15 in the arrangement direction D2. The second deck standby adjacent portions 48 are provided at two locations separated from each other in the direction along the moving direction D1 of the second tundish car 14. Specifically, these two places adjacent to the second deck during standby 48 are the handrail fence 15d on the approach space side of the second tundish deck 15 when the second tundish car 14 is in the second waiting area 108. The part between one end of the handrail and the one end handrail fence 15c on the one end side, the other end of the entry space side handrail fence 15d, and the other end handrail fence 15c on the other end side. Adjacent to each.

The second deck 21 is configured to be symmetrical with the first deck 20 toward the casting position D along the arrangement direction D2 (see FIGS. 2 and 3). The second deck 21 has a second floor plate 37 and two second columns 38. The arrangement and configuration of the second floor plate 37 and the two second columns 38 correspond to the arrangement and configuration of the first floor plate 32 and the two first columns 34 of the first deck 20 inverted left and right. The second floor plate 37 has an upper surface (floor surface) on which an operator rides. The upper surface of the second floor plate 37 corresponds to the boarding surface of the second deck 21. The upper surface of the second floor plate 37 is located at substantially the same height as the upper surface of the floor plate 15a of the second tundish deck 15 (see FIG. 4). The second floor plate 37 has a second overhanging portion 37a that projects from the second strut 38 closest to the approach space 120 of the dummy barker 18 toward the approach space 120 side of the two second columns 38. The second overhanging portion 37a constitutes the adjacent portion 46 when the second deck is cast.

The edge of the second overhanging portion 37a on the approach space 120 side is the edge of the second deck 21 on the approach space 120 side. The space between the end edge of the second overhanging portion 37a and the end edge of the first overhanging portion 32a on the entry space 120 side is the entry space of the holding portion 18c of the dummy barker 18.

The space is located on the approach space 120 side of the second support column 38 closest to the entry space 120 and below the second overhanging portion 37a. A portion of the dummy barker 18 protruding toward the second support column 38 from the holding portion 18c in the width direction of the carriage portion 18b of the dummy barker 18 enters this space.

Further, the continuous casting facility 1 of the present embodiment includes a handrail fence 39 and a second staircase 40 provided on the second deck 21.

The handrail fence 39 is arranged and configured so as to be symmetrical with the handrail fence 35 provided on the first deck 20.

The second staircase 40 is for going up and down between the second floor plate 37 of the second deck 21 and the cast floor 100. The second staircase 40 is provided at the end of both ends of the second floor plate 37 in the direction along the moving direction D1 of the second tundish car 14, which is far from the casting site 104, and is the second from the end. It is possible to descend to the side opposite to the moving area of the tundish car 14 (the side opposite to the second waiting area 108).

Further, as shown in FIG. 2, the continuous casting facility 1 of the present embodiment has a first heating device 52 for heating the first tundish 10a waiting at the first standby position E and a second standby position. Further, a second heating device 54 for heating the second tundish 10b waiting at F is provided. When the cold tundish 10 is arranged at the casting position D, the molten steel poured from the ladle 6 hardens in the tundish 10, and the molten steel cannot be poured from the tundish 10 into the mold 3. Therefore, when the first tundish 10a is waiting at the first standby position E, the first tundish 10a is heated by the first heating device 52, and then the first tundish 10a is cast. It prevents the molten steel from solidifying when it is placed at position D. For the same reason, when the second tundish 10b is waiting at the second standby position F, the second tundish 10b is heated by the second heating device 54.

The first heating device 52 is installed on the cast floor 100 on the opposite side of the first waiting area 106 with the first waiting area 106 interposed therebetween, and is arranged adjacent to the first waiting area 106. Further, the second heating device 54 is installed on the cast floor 100 on the opposite side of the second waiting area 108 with the second waiting area 108 interposed therebetween, and is arranged adjacent to the second waiting area 108.

As shown in FIG. 12, the first heating device 52 rotates around a horizontal axis with the heating device main body 52a erected on the cast floor 100 adjacent to the first waiting area 106 and the heating device main body 52a. It has an arm-shaped nozzle 52b attached so as to be movable. The first heating device 52 is configured to eject a flame from the nozzle 52b, and blows the flame ejected from the nozzle 52b into the space in the first tundish 10a waiting at the first standby position E. This heats the first tundish 10a. The nozzle 52b extends substantially horizontally from the heating device main body 52a toward the first waiting area 106, and blows a flame into the space in the first tundish 10a, and turns upward from the blowing posture P1. It is possible to take the moved retracted posture P2.

Further, the configuration of the second heating device 54 is the same as the configuration of the first heating device 52.

Further, in the continuous casting facility 1 of the present embodiment, the feed rate of the slab by the feed device 4 and the molten steel from the first tundish 10a controlled by the slide valve provided in the first tundish 10a to the casting port 101 To adjust at least one of the pouring flow rate of the molten steel and the pouring flow rate of the molten steel from the second tundish 10b controlled by the slide valve provided in the second tundish 10b to the casting port 101. Further includes a first operating device 62 and a second operating device 64 to be operated. The first and second operating devices 62 and 64 are so-called pendant switches.

The first operating device 62 is attached to the first overhanging portion 32a of the first deck 20 so as to be movable between the operating position (see FIGS. 8 and 9) and the retracted position (see FIGS. 10 and 11). It is installed. The operation position is a position where the first operation device 62 is operated by an operator, and is a position adjacent to the casting position D in the entry space of the dummy barker 18 between the first deck 20 and the second deck 21. be. The retracted position is a position where interference between the first operating device 62 and the dummy barker 18 is avoided, and is a position outside the entry space of the dummy barker 18.

The first operation device 62 has a box-shaped operation device main body 62a having an operation switch, and a suspension lower portion 62b for suspending the operation device main body 62a from the first overhanging portion 32a of the first deck 20.

The hanging lower portion 62b has a portion attached to the first overhanging portion 32a so as to extend downward from the first overhanging portion 32a, a portion extending horizontally from the lower end of the portion, and further extending downward from the portion. It has a portion connected to the operation device main body 62a. The portion of the suspended lower portion 62b attached to the first overhanging portion 32a can be swiveled around the vertical axis with respect to the first overhanging portion 32a. When the suspended lower portion 62b rotates, the first operating device 62 projects into the entry space of the dummy barker 18 as shown in FIG. 5, and the operator operates the operation switch of the operating device main body 62a in the vicinity of the casting position D. It is possible to move between an operable operating position and a retracting position that does not interfere with the dummy barker 18 outside the approach space.

Similar to the first operating device 62, the second operating device 64 is located between the operating position in the approach space of the dummy barker 18 between the first deck 20 and the second deck 21 and the evacuation position outside the approach space. It is attached to the second overhanging portion 37a of the second deck 21 so that it can be moved by. The configuration of the second operating device 64 is the same as the configuration of the first operating device 62.

In the present embodiment, the first deck 20 and the second deck 21 are adjacent to the first tundish deck 13 when the first tundish car 12 is in the casting place 104, and the second tundish car 14 is cast. When it is in the field 104, it has the second tundish deck 15 and the adjacent casting portions 42 and 46, respectively, and goes up and down between the casting floor 100 and the first deck 20 on the first deck 20. A first staircase 36 is provided for this purpose, and a second staircase 40 for going up and down between the cast floor 100 and the second deck 21 is provided on the second deck 21. Therefore, if molten steel leaks from the first tundish 10a to the casting floor 100 in the vicinity of the casting position D at the casting position D, the worker on the first tundish deck 13 can use the first deck. Casting away from the casting position D, which is not affected by the leaked molten steel, by going down the first staircase 36 via the top of 20 or going down the second staircase 40 via the top of the second deck 21. It can be evacuated to the built-in floor 100.

Further, in the present embodiment, the operator moves the first and second tundish cars 12 and 14 until the work at the casting position D and the first and second standby positions E and F occurs. Occasionally, you can stand by on the first deck 20 or the second deck 21. As the work in the first and second standby positions E and F, for example, after extinguishing the heating of the first and second tundish 10a and 10b by the first and second heating devices 52 and 54, the tundish cover 31 There is work such as attaching a heat insulating cover to the heating port. The work at the casting position D includes connecting a hydraulic hose to the slide valve of the ladle 6, opening the ladle nozzle 24, and putting a heat insulating material into the space inside the tundish 10.

In order to prevent the temperature of the tundish 10 heated in the first and second standby positions E and F from dropping, the operator can start casting when the tundish 10 is placed in the casting position D. You need to get ready quickly. Therefore, the worker needs to quickly move from the first standby position E and the second standby position F to the casting position D, but in the present embodiment, after the work at the first standby position E, the first is performed. From the top of the tundish deck 13 to the first deck 20 without descending to the casting floor 100, after the first tundish car 12 moves to the casting site 104, from the top of the first deck 20 to the top of the first tundish deck 13. You can cross over again. Further, after the work at the second standby position F, the second tundish car 14 moves to the casting place 104 after crossing over to the second deck 21 without descending from the second tundish 15 to the casting floor 100. , You can cross from the 2nd deck 21 to the 2nd tundish deck 15 again. Therefore, the operator can quickly move to the casting position D. In addition, the number of times of going up and down the stairs can be reduced, and the labor spent on going up and down the stairs can be reduced.

Further, in the present embodiment, materials necessary for the above work, such as a ladle nozzle 24, an oxygen opening pipe used for opening the ladle nozzle 24, a heat insulating material, a temperature measuring device, and the like are placed on the first and second decks 20 and 21. It is possible to put it in the room, and it is not necessary to carry the necessary materials from the cast floor 100 through the stairs each time the work is performed. Therefore, it is highly convenient for the worker.

Further, in the present embodiment, the first deck 20 and the second deck 21 provide an entry space for the dummy barker 18 to convey the dummy bar 16 to the insertion position 116 for inserting the dummy bar 16 into the molding space in the mold 3 from above. They are arranged apart from each other so as to be open between the decks 20 and 21 of the above. Therefore, the dummy bar 16 is provided by the dummy barker 18 without causing interference between the dummy barker 18 and the first and second decks 20, 21 while enhancing the convenience of the operator by the first and second decks 20, 21. It is possible to realize a configuration that can be conveyed to the insertion position 116 and inserted into the molding space in the mold 3 from above.

Further, since the entry space 120 is secured between the first deck 20 and the second deck 21, the dummy bar 16 of the dummy barkers 18 is used to avoid interference with the first and second decks 20, 21. The height of the holding portion 18c for holding the is not restricted. Therefore, instead of increasing the length of the holding portion 18c in the direction along the arrangement direction D2, the height of the holding portion 18c is increased on the holding portion 18c necessary for holding the dummy bar 16 having a large length. The distance can be secured. If the length of the holding portion 18c in the direction along the arrangement direction D2 is increased, the length of the dummy barker 18 in the same direction is increased, so that the total length of the cast floor 100 in the same direction is increased accordingly. I have no choice but to do it. However, in the present embodiment, the dummy bar 16 having a large length can be held by increasing the height of the holding portion 18c without increasing the length of the holding portion 18c, so that the total length of the cast floor 100 can be increased. It can be suppressed.

Further, when the dummy barker 18 has not entered the approach space 120, the entry space 120 is used as a space for accessing the underfloor feeding device 4 of the cast floor 100 from above for maintenance or the like. Can be done. Therefore, for example, the underfloor feeding device 4 can be accessed from above through the approach space 120 by an overhead crane for replacing the roll stand which is a component of the feeding device 4. That is, the roll stand can be lifted from the underfloor feeding device 4 and the roll stand can be lifted from the underfloor feeding device 4 through the approach space 120 by an overhead crane.

Further, in the present embodiment, since the entry space of the holding portion 18c of the dummy barker 18 is secured between the first deck 20 and the second deck 21, the first is to avoid interference with the dummy barker 18. And it is not necessary to increase the height of the second decks 20 and 21. Therefore, the boarding surface of the first tundish deck 13, the boarding surface of the second tundish deck 15, the boarding surface of the first deck 20, and the boarding surface of the second deck 21 can be positioned at the same height. It has become. Therefore, when the worker goes back and forth between the boarding surface of the first tundish deck 13 and the boarding surface of the first deck 20, the boarding surface of the first tundish deck 13 and the boarding surface of the second deck 21 When going back and forth between the boarding surface of the 2nd tundish deck 15 and the boarding surface of the 2nd deck 21, and when going back and forth between the boarding surface of the 2nd tundish deck 15 and the boarding surface of the 1st deck 20 It is possible to prevent stumbling when going back and forth on the boarding surface.

Further, in the present embodiment, the boarding surface of the first tundish deck 13 is located at the same height as the upper surface of the tundish cover 31 of the first tundish 10a, and the boarding surface of the second tundish deck 15 is the first. 2 It is located at the same height as the boarding surface of the tundish cover 31 of the tundish 10b. Therefore, when the first tundish 10a is waiting at the first standby position E and when the second tundish 10b is waiting at the second standby position F, the first tundish 10a and the second tundish 10b are waiting. It is possible to prevent the operator from stumbling when moving onto the tundish cover 31 due to the work performed on the tundish cover 31. That is, it is difficult for the worker to stumble at the boundary between the first tundish cover 31 and the first tundish deck 13 in addition to the boundary between the first deck 20 and the first tundish deck 13. can do. In addition to the boundary between the second deck 21 and the second tundish deck 15, the worker also stumbles at the boundary between the tundish cover 31 and the second tundish deck 15 of the second tundish deck 10b. It can be made difficult.

Further, in the present embodiment, the first floor plate 32 of the first deck 20 projects from the first support column 34 near the entry space 120 of the dummy barker 18 toward the entry space 120 to form the adjacent portion 42 when the first deck is cast. It has a first overhanging portion 32a. Further, the second floor plate 37 of the second deck 21 has a second overhanging portion 37a that projects from the second support column 38 near the approaching space 120 toward the approaching space 120 and constitutes an adjacent portion 46 when the second deck is cast. .. Therefore, when there is a first tundish car 12 or a second tundish car 14 in the casting site 104, an access route between the tundish deck on the tundish car and the first and second decks 20, 21 Can be secured. Moreover, the stability of the dummy barker 18 is ensured by making the bogie portion 18b located below the first overhanging portion 32a and the second overhanging portion 37a of the dummy barker 18 wider than the entry space 120. While doing so, it is possible to avoid interference with the first and second decks 20 and 21 by allowing both side portions of the carriage portion 18b in the width direction to enter the spaces below the first and second overhanging portions 32a and 37a.

Further, since a large space width can be secured below the first and second overhanging portions 32a and 37a, the space is used to access the underfloor feeding device 4 of the cast floor 100 during maintenance of the feeding device 4. Ease can be improved. Specifically, by ensuring a large width of this space, it is possible to widen the distance between the pair of rails 112 for moving the dummy barker 18. If the distance between the pair of rails 112 is small, a beam for supporting these rails 112 must be placed above the feeding device 4 at a position in the vicinity thereof, and the beam and the pair of rails 112 must be arranged in the vicinity thereof. When accessing the underfloor feeding device 4 of the cast floor 100 from above, for example, in order to replace the roll stand of the feeding device 4, the roll stand is carried out from under the floor of the cast floor 100 by an overhead crane, and a new roll stand is used. It becomes an obstacle when carrying under the floor. On the other hand, since the distance between the pair of rails 112 can be widened as described above, the area for carrying out the roll stand from under the floor of the cast floor 100 and carrying in the roll stand under the floor is provided. A large amount can be secured between the pair of rails 112, and the beams supporting the rails 112 can be arranged at positions that do not hinder the loading and unloading of the roll stand by the overhead crane. Therefore, in the present embodiment, in order to easily access the feeding device 4, specifically, in order to replace the roll stand of the feeding device 4, the roll stand is carried out from under the floor of the cast floor 100 by an overhead crane, and a new roll is used. The ease of carrying the stand under the floor can be improved.

Further, in the present embodiment, the first and second operating devices 62 and 64 are located from the operating position in the approach space of the dummy barker 18 between the first deck 20 and the second deck 21 and from the entry space of the dummy barker 18. It is attached to the corresponding decks 20 and 21 so as to be movable to and from the detached retract position. Therefore, the operator can feed the slab by the feeding device 4, the flow rate of molten steel pouring from the first tundish 10a to the casting port 101, or the pouring of molten steel from the second tundish 10b to the casting port 101. When operating the first and second operating devices 62 and 64 to adjust the flow rate, since it is during casting, the dummy barker 18 enters the entry space between the first deck 20 and the second deck 21. In that state, the first and second operating devices 62 and 64 can be brought closer to the casting port 101 by arranging the first and second operating devices 62 and 64 at the operating positions. Therefore, it is possible to easily adjust the feed rate while observing the state of the molten steel at the casting port 101. Further, when the dummy barker 18 enters the approach space in order to convey the dummy bar 16 to the insertion position 116, the first and second operations are performed by arranging the first and second operating devices 62 and 64 at the retracted positions. Interference between the devices 62 and 64 and the dummy barker 18 can be avoided.

Further, in the present embodiment, the first tundish 10a waiting at the first standby position E can be heated by the first heating device 52, and the second tundish waiting at the second standby position F can be heated. 10b can be heated by the second heating device 54. Therefore, when the first tundish 10a is moved from the first standby position E to the casting position D and the molten steel is poured into the first tundish 10a from the ladle 6, the molten steel becomes the first tundish 10a. In addition to being able to prevent it from solidifying inside, the second tundish 10b was moved from the second standby position F to the casting position D, and molten steel was poured into the second tundish 10b from the ladle 6. Occasionally, it is possible to prevent the molten steel from solidifying in the second tundish 10b.

Further, in the present embodiment, since the first heating device 52 is on the side opposite to the first deck 20 with the first waiting area 106 in between, the space on the first deck 20 side, which is the work place, is occupied by the first heating device 52. It can be prevented from being done. If the first heating device 52 is installed at a location beyond the first deck 20 from the first waiting area 106, the first heating device 52 moves to the first tundish 10a at the first standby position E. An arm-shaped nozzle 52b for supplying heat crosses over the first deck 20 and reaches the first tundish 10a, obstructing the passage on the first deck 20. On the other hand, in the present embodiment, since the first heating device 52 is on the opposite side of the first deck 20 with the first waiting area 106 interposed therebetween, it is possible to prevent the nozzle 52b from crossing the first deck 20. Further, since the second heating device 54 is on the opposite side of the second waiting area 108 from the second deck 21, the space on the second deck 21 side that serves as a work place is the same as in the case of the first heating device 52. Can be prevented from being occupied by the second heating device 54, and the nozzle for supplying heat to the second tundish 10b can be prevented from crossing over the second deck 21.

The continuous casting equipment according to the present invention is not necessarily limited to the above-mentioned configuration. For example, the following configuration can be adopted for the continuous casting equipment according to the present invention.

The position of the first staircase in the direction along the moving direction of the first tundish car and the position of the second staircase in the direction along the moving direction of the second tundish car are not necessarily limited to the above-mentioned positions. That is, the first staircase and the second staircase may be installed at a position closer to the casting site as long as they do not interfere with the dummy barker.

The first tundish deck is not necessarily limited to the one configured to substantially surround the first tundish mounted on the first tundish car, and the second tundish deck is the first tundish car. It is not necessarily limited to the one configured to substantially surround the circumference of the mounted second tundish. For example, the first tundish deck may be provided only in the area adjacent to the first deck side with respect to the first tundish. Similarly, the second tundish may be provided only in the area adjacent to the second deck side with respect to the first tundish.

Further, the operating device in the present invention does not necessarily have to be provided on both the first deck and the second deck, and the operating device may be attached to only one of the first deck and the second deck. ..

Further, the operating device is not a swivel type as described above, but the first deck and / or the first deck so that the operating position in the approach space of the dummy barker and the evacuation position outside the approach space can be obtained by sliding. It may be attached to two decks.

Further, the continuous casting facility does not necessarily have to be equipped with a dummy barker. That is, the continuous casting equipment according to the present invention is not necessarily limited to the form in which the dummy bar separated from the slab is conveyed to the insertion position and inserted into the space inside the mold from above, and the dummy bar is inserted into the space inside the mold from below. Including the form of inserting.

In a continuous casting facility without a dummy barker, the first deck and the second deck may be connected to each other. That is, the entry space for the dummy barker may not be provided between the first deck and the second deck.

Further, between one end of the entry space side handrail fence on the first and second tundish decks and one end handrail fence on the one end side, and the other end and the other end side of the entry space side handrail fence. A chain may be erected between the other end handrail fence and the railing fence to close the space between the handrail fences. In addition, a chain for closing the space on the adjacent portion of the first deck when casting the first deck is erected between the handrail fences on both sides of the space, and the space on the adjacent portion on the standby portion of the first deck is closed. Therefore, the chain may be erected between the handrail fences on both sides of the space. Similarly, a chain for closing the space on the adjacent portion of the second deck when casting the second deck is erected between the handrail fences on both sides of the space, and the space on the adjacent portion on the standby portion of the second deck is installed. A chain for closing the space may be erected between the handrail fences on both sides of the space. These chains are removed to allow passage of the space when it is necessary to pass through the space to be closed, and the space is closed by the chain when it is not necessary. This is preferable from the viewpoint of safety.

1 Continuous casting equipment 3 Mold 6 Ladle 10a 1st tundish 10b 2nd tundish 12 1st tundish car 13 1st tundish deck 14 2nd tundish car 15 2nd tundish deck 16 Dummy bar 18 Dummy bar car 20th 1 deck 21 2nd deck 52 1st heating device 54 2nd heating device 62 1st operation device 64 2nd operation device D Casting device E 1st standby position F 2nd standby position

Claims (7)

It is a continuous casting facility that continuously casts slabs.
A casting device installed under the casting floor and continuously forming the slab from molten steel received through a casting port opened in the casting floor.
A ladle in which molten steel is placed and placed above the casting port,
A first tundish in which one of them is arranged at a casting position above the casting port and below the ladle to receive molten steel from the ladle and pour the received molten steel into the casting port. And the second tundish,
The first tundish is mounted, and the mounted first tundish is arranged at the casting position where the casting position is arranged, and the first tundish is arranged at the first standby position away from the casting position. A first tundish that transports the first tundish between the casting position and the first waiting position by moving on the casting floor with the first waiting area along a specific moving direction. With a car
The casting site where the second tundish is mounted and the mounted second tundish is arranged at the casting position and the second tundish from the casting position to the side opposite to the first standby position. The second tundish is moved to the casting position and the second standby position by moving along the movement direction on the casting floor with and from the second waiting place arranged at the second standby position away from each other. The second tundish car to be transported between
A first tundish deck installed on the first tundish car and allowing workers to work on it, and a first tundish deck.
A second tundish deck installed on the second tundish car and allowing workers to work on it, and a second tundish deck.
The first deck installed on the cast floor at a position on one side in the arrangement direction orthogonal to the moving direction with respect to the moving area of the first tundish car, and the first deck.
A first staircase provided on the first deck and allowing an operator to go up and down between the first deck and the cast floor.
A second deck installed on the cast floor at a position on one side of the second tundish car in the arrangement direction with respect to the moving area of the second tundish car.
A second staircase provided on the second deck and allowing an operator to go up and down between the second deck and the cast floor is provided.
The first deck is adjacent to the first tundish deck in the arrangement direction when the first tundish car is in the casting place and when the second tundish car is in the casting place. The first deck adjacent portion adjacent to the second tundish deck in the arrangement direction at the time of casting, and the first tundish deck in the arrangement direction when the first tundish car is in the first waiting area. It has an adjacent 1st deck standby adjacent part,
The second deck is adjacent to the second tundish deck in the arrangement direction when the second tundish car is in the casting place and when the first tundish car is in the casting place. The second deck adjacent to the first tundish deck in the arrangement direction at the time of casting, and the second tundish deck in the arrangement direction when the second tundish car is in the second waiting area. A continuous casting facility having an adjacent second deck standby adjacent portion. The casting device is a mold that surrounds a molding space extending downward from the casting port, and molds molten steel poured into the molding space through the casting port into the slab, and in the molding space. It has a feeding device for pulling out the molded slab downward from the molding space and feeding the slab to the downstream side.
The continuous casting facility is a dummy bar that is inserted into the molding space through the casting port before the start of pouring the molten steel into the molding space, and the molten steel poured into the molding space is downward from the molding space. The casting is closed so as to prevent the slab from flowing out to the molding space, and the slab is pulled out from the molding space as the dummy bar is fed downstream by the feeding device. The casting along the arrangement direction to connect to the lower end of the piece and to convey the dummy bar separated from the slab to an insertion position that can be inserted into the molding space again after being fed by the feeding device. Further equipped with a dummy barker that moves on the embedded floor,
The first deck and the second deck are separated from each other so as to allow an entry space between the decks to allow the dummy barker to enter to carry the dummy bar to the insertion position. Item 1. The continuous casting equipment according to item 1. The first tundish deck, the second tundish deck, the first deck, and the second deck each have a boarding surface on which a worker rides.
The boarding surface of the first tundish deck, the boarding surface of the second tundish deck, the boarding surface of the first deck and the boarding surface of the second deck are located at the same height, according to claim 2. Continuous casting equipment. Both the first tundish and the second tundish have an opening on the upper side.
The continuous casting facility has a first tundish cover that covers the first tundish so as to cover the upper opening of the first tundish, and the second tundish cover that covers the upper opening of the second tundish. Further equipped with a second tundish cover that can be put on the tundish,
The boarding surface of the first tundish deck is located at the same height as the upper surface of the first tundish cover.
The continuous casting facility according to claim 3, wherein the boarding surface of the second tundish deck is located at the same height as the upper surface of the second tundish cover. The first deck has a first floor board that allows an operator to ride on it, and at least one first strut that is erected on the cast floor and supports the first floor board from below.
The second deck has a second floorboard that allows an operator to ride on it, and at least one second strut that is erected on the cast floor and supports the second floorboard from below.
The first floor plate has a first overhanging portion that projects from the first strut closest to the entry space to the entry space side of the at least one first strut and constitutes an adjacent portion at the time of casting the first deck. Have and
The second floor plate projects from the second column closest to the entry space among the at least one second column toward the entry space, and forms a second overhanging portion that constitutes an adjacent portion when the second deck is cast. The continuous casting facility according to any one of claims 2 to 4. Attached to at least one of the first deck and the second deck, the feeding speed of the slab by the feeding device, the pouring flow rate of the molten steel from the first tundish to the casting port, and the second. Further equipped with at least one operating device operated to regulate at least one of the molten steel pouring flow rates from the tundish to the casting port.
The at least one operation device is a position in the entry space of the dummy barker between the first deck and the second deck, and the operation position where the operation device is operated and the entry of the dummy barker. Claims 2-5, which are attached to at least one of the decks so as to be movable between a position outside the space and a retracted position where interference between the operating device and the dummy barker is avoided. The continuous casting equipment according to any one of the above items. It is installed on the cast floor on the opposite side of the first deck with the first waiting area in between, and heats the first tundish when the first tundish is waiting at the first waiting position. The first heating device and
It is installed on the cast floor on the opposite side of the second deck with the second waiting area in between, and heats the second tundish when the second tundish is waiting at the second waiting position. The continuous casting facility according to any one of claims 1 to 6, further comprising a second heating device.

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