JPH08197210A - Method for removing remained steel and slag in tundish for continuous casting apparatus and device for tilting tundish - Google Patents

Abstract

PURPOSE: To simplify an apparatus and to make a slag removing treatment efficiency by changing ascending strokes at the front part and the rear part of a tundish and executing the discharging treatment of remained steel from a lower position side of the tundish. CONSTITUTION: The tundish 1 is laid on a tundish car 2 and carried in the longitudinal direction. The tundish car 2 is stopped at the position for removing the remained steel and slag on a carrying rails 3, and at this position, the whole tundish 1 is floated up by using an elevating cylinders 8, 9. The ascending strokes at the front part and the rear part of the tundish 1 are changed by using a tilting cylinder 13 so that the difference of the heights at the front part and the rear part of the floated up tundish 1 develops in the longitudinal direction. Then, the discharge-treatment of the remained steel into a receiving pot 4a is executed from the lower position side of the tundish 1. By this method, the remained steel and slag and impurities can surely be discharged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for removing residual steel and slag in a tundish that has been cast on a casting floor, and more particularly to tilting a tundish in the longitudinal direction in the middle of a transfer track. The present invention relates to a method for discharging residual steel in a tundish and a tundish tilting device for a continuous casting facility for discharging residual steel and the like.

[0002]

2. Description of the Related Art Usually, the inside of a tundish after casting is
Molten steel and slag remain, and when this tundish is transported to a repair factory and residual steel and slag are discharged, the residual steel and the like may solidify during transport and become fixed in the tundish. Therefore, usually, a slag area is provided near the casting yard before reaching the repair factory, and the tundish is tilted here to perform the slag treatment. Conventionally, as a tilting device for this tundish, a tundish tilting trolley was prepared separately from the tundish car, and the tundish was transferred from the tundish car to the tilting trolley and transported to the slag area. It is known that the cylinder device provided above tilts the tundish to one side.

Further, as shown, for example, in Japanese Utility Model Laid-Open No. 58-38356, a tundish car itself equipped with a tilting device is also known. The structure is such that a cylinder type lifting device is provided on one end side in the running direction of the tundish car, and a horizontal shaft that supports the bottom part of the tundish car is rotatably supported on the other end side in the running direction. Forming an outlet for residual steel that can be opened and closed with a sliding gate near the bottom of the, and tilting the tundish to one side in the longitudinal direction with the horizontal axis as a fulcrum by operating the cylinder type lifting device at the slag position, The residual steel and the slag are made to flow from the discharge port to the receiving pot below.

In addition, a tilting cylinder and a steel drain gutter are provided between the tundish car running rails on the casting floor, and the tilt gutter is pivotally attached to the lateral side of the tundish car.
By operating the tilting cylinder, the tundish is tilted laterally to one side, and the residual steel is discharged from the steel discharge port on the side of the tundish through the tilt gutter and the steel discharge gutter to the lower steel discharge cart. The thing is also disclosed (actual Kaihei 3-120
948).

[0005]

In the tundish slag device in which the above-mentioned tundish tilting carriage is provided separately from the tundish car, it is necessary to transfer the tundish from the tundish car to the tilting carriage each time the waste is discharged. There is. At this time, the tundish is raised by the elevating device of the tundish car, and in that state, the tilting carriage is moved downward and the elevating device is lowered again to transfer the tundish to the tilting carriage. After that, a complicated procedure of moving the tundish tilting carriage to the slag area and tilting the tundish is required. In addition, many preparation steps have to be performed until the tundish is tilted, such as transporting the tundish from the normal moving route to the lateral slag route, which is not only inefficient, but also the internal residual steel May solidify. In addition, there is a drawback that a special trolley for tilting and a dedicated rail need to be laid, resulting in high cost.

The above-mentioned Japanese Utility Model Laid-Open No. 58-38356 which tilts the tundish in the longitudinal direction on the tundish car does not have a structure in which the tundish and the tundish car can be separated from each other. It is uneconomical to connect the tundish car with a cylinder type tilting device, and to use a tilting device for each tundish car. Also, since the tundish tilts only in one direction, it is difficult to discharge the residual steel and slag near the bottom of one side of the tundish and the residual steel when a weir is provided at the central bottom of the tundish in the longitudinal direction. Moreover, it is necessary to provide a special openable / closable discharge port at a low position on the side part of the tundish, which also increases the cost. Actual Kaihei 3-120948 described above
Although the one disclosed in the publication has the advantage that it can be discharged on the pouring floor, it can be tilted only in one direction in the same manner, and in this case, since it is tilted in the lateral direction, the longitudinal side edge (tilt In order to effectively discharge steel up to the side), a large tilt must be made up to about 90 °, and there has been a problem that the whole device becomes large-scale, such as the installation of a large-stroke tilt cylinder and a movable gutter.

Therefore, in the present invention, the residual steel and slag at both ends of the tundish can be effectively discharged, and the tundish can be quickly discharged on a normal conveying path without moving to another waste path. It is an object of the present invention to provide a tundish slag disposal method for casting equipment.

Further, the present invention solves various problems of the above-mentioned conventional device, and makes it possible to easily tilt the tundish on any of the front and rear sides in the longitudinal direction (conveying direction) on the conveying orbit of the tundish. An object is to provide a tundish tilting device having a simple structure and operation.

[0009]

A method for removing residual steel in a tundish in a continuous casting facility according to the present invention is to convey a tundish car equipped with a tundish in the longitudinal direction of the tundish, and to transport the tundish on the orbit. The process of stopping the tundish car at the remaining steel slag position, and pushing up the entire tundish from the track side at the stop position to levitate from the tundish car, and the floating tundish at the front and rear in the longitudinal direction. The process of changing the rising stroke of the front and back of the tundish so that there is a difference, and the residual steel is discharged from the low side of the tundish, or depending on the purpose, the residual steel is more efficient from the pouring nozzle at the bottom of the tundish. And a step of performing a discharge process.

Further, in the tundish tilting device of the continuous casting facility according to the present invention, an elevating unit and a tilting unit are provided on the track installation side along the tundish transport track,
At the upper end of the expansion and contraction operation part of each of these units, an engagement support part that engages with an engagement part provided at the longitudinal front and rear part of the tundish is formed, and the expansion and contraction operation part is provided on the transport track of the tundish. It is possible to evacuate to a position that does not hinder passage.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a tundish tilting device according to the present invention and a tundish and a tundish car during normal traveling. The tundish 1 is placed on a tundish car 2 traveling on a track 3 with its longitudinal direction facing the transport direction. Two residual steel receiving pots 4a and 4b are installed in the conveying direction at a slag position on the way between the pair of tracks 3. However, in the tundish having a structure that can be discharged by tilting only one side, only one pot may be used. The tundish 1 is provided with residual steel overflow ports 1a and 1b continuing to the upper and lower sides of the tundish in the longitudinal direction, and a pair of nozzles 5a and 5b for pouring a mold (not shown) at the bottom. . A support frame 6 having a substantially U-shape is arranged side by side in the longitudinal direction from the bottom of the tundish 1 to both sides thereof, and symmetrically provided from the center position to the front and back, and an engagement pin described later is provided at the bottom of the support frame 6. There is.

FIG. 2 is a side sectional view showing a tundish tilting device according to an embodiment of the present invention in a state during a tundish tilting operation. 3 is a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a plan sectional view taken along the line BB of FIG. It should be noted that FIG. 2 is taken along the line CC in FIG. Referring to these drawings, a pair of front and rear lifting cylinders (a pair of front and rear) are provided on the lower support frame 7 of the track 3 between the pair of remaining steel receiving pots 4a and 4b, one pair in front and rear (a pair of front side The reference numeral 8 indicates a pair of rear sides and is indicated by reference numeral 9). As shown in FIGS. 2 and 4, the lifting cylinders 8 and 9 have the lifting and lowering operation parts 8a and 9a, respectively, as shown in FIGS.
It is inserted into the guide members 11a and 11b fixed between the a and 4b shield bricks 23 and moved up and down only in the vertical direction. The upper and lower ends of the elevating and lowering operation portions 8a and 9a are substantially semicircular or V-shaped engaging grooves 12 that open upward.
a and 12b are formed, and the engaging groove 12 is formed during the tilting operation.
Either one of the front and rear portions of a and 12b is engaged with the corresponding engagement pin 10a or 10b of the bottom portion of the tundish 1 and pivotally supported. In the illustrated example, the elevating / lowering operation parts 8a and 9a of the elevating cylinders 8 and 9 are composed of a cylinder body part, and the cylinder rods 8b and 9b extend downward from the body part and are pivotally attached to the support frame 7. In reverse, the lower end of the cylinder body is attached to the support frame 7, the cylinder rod side is extended upward, and an engagement groove for engaging with the tundish side engagement pins 10a, 10b is formed at the tip of the rod. You may do it. In this case, the guide members 11a and 11b guide the cylinder rod.

A pair of tilting cylinders 13, 13 are respectively sandwiched between lifting cylinders 8 and 9 at the front and rear portions (see FIGS. 3 and 4).
14 is provided on the support frame 7. Each tilting cylinder 1
3, 14 are arranged so as to be located in the central portion of the tundish 1 in the width direction, and the cylinder main body 13 of each is arranged.
The intermediate portions of a and 14a are pivotally supported by pedestals 15 and 16 on the support frame 7, and the extension strokes of the tilting motion rods 13b and 14b that move in and out of the cylinder bodies 13a and 14a are larger than those of the lifting cylinders 8 and 9. Like the elevating cylinders 8 and 9, the ends are long and substantially semicircular or V-shaped engaging grooves 17a and 17b are formed which are open upward, and one of the engaging grooves corresponds to the tundish 1 when tilting. It engages with the engaging pin 18a or 18b.

As described above, one of the tilting cylinders 13 and 14 (depending on the tilting direction of the tundish 1) is
In cooperation with this, one of the lifting cylinders 9 and 8 on the opposite side in the longitudinal direction cooperates with one of the lifting cylinders 9 and 8 to tilt about the pivot point 19 of the cylinder body 13a or 14a by the extension of the tilting movement rod 13b or 14b of the tilting cylinder 13 or 14. When receiving the tundish 1 from the tundish car 2, it must be in a vertical state, and for this purpose, the tension spring 20 and the tension spring 20 are provided between the lower portion of the cylinder bodies 13a and 14a and the side portions of the pedestals 15 and 16. A stopper 21 is provided that contacts the cylinder bodies 13a and 14a in a vertical state. The means for bringing the lower parts of the cylinder bodies 13a, 14a into contact with the stopper 21 may use, for example, an air cylinder device instead of the tension spring 20 described above.

Lifting cylinders 8 and 9 and tilting cylinder 1
3 and 14, respectively, in the state of being contracted to the lowest position, the lifting operation portions 8a and 9a and the tilting movement rods 13b and 1 respectively.
It is set so that the front end of 4b is located below the transport path 3. Therefore, when the tundish car 2 travels on the transport track 3 without discharging the tundish 1, the tundish 1 and the tundish car 2 are provided with the lifting cylinders 8 and 9 and the tilting cylinders 13,
It is possible to travel on the transportation track 3 without causing any interference with the rail 14. After the waste of the tundish 1 is finished, the tundish 1 is placed on the tundish car 2 and the orbit 3
Similarly, when passing above, it can pass on the track 3 without any trouble.

Although partially overlapping with the above, as shown in FIG.
More specifically, the operation of slag work by raising the left side of the tundish 1 will be described. The tundish 1 having molten steel or slag left inside after completion of pouring into the mold or replacement of the tundish is a tundish. It is carried on the track 3 while being mounted on the dish car 2, and stops at the slag position. Here, the tilting cylinder 13 and the lifting / lowering cylinder 9 are operated to raise the tilting motion rod 13b and the lifting / lowering operating portion 9a, and the engaging groove 17a of the operating rod 13b, the tundish-side engaging pin 18a, and the lifting / lowering operating portion 9a.
By engaging the engagement groove 12b at the tip of a and the engagement pin 10b on the tundish side, the tundish 1 is temporarily raised to the cylinder upper limit position so that it does not interfere with the tundish car 2 when tilted. Separate the tundish 1 and tundish car 2. The broken line S in FIG.
The position of is the position when the tundish 1 is placed on the tundish car 2, and the position of the broken line H is the position of the tundish 1 when the lifting cylinders 8 and 9 horizontally move up.

Next, the engaging groove 17a at the tip of the tilting movement rod 13b and the corresponding engaging pin 18a at the bottom of the tundish.
The tundish 1 is pushed up by the extension of the actuating rod 13b in the state in which and are engaged. The tundish 1 is largely tilted rearward from the horizontal state shown by the broken line H in FIG. 2 with the tip of the elevating and lowering operation portion 9a of the rear elevating cylinder 9 as a fulcrum as shown in FIG. The steel is discharged to the residual steel receiving pot 4b from the overflow port 1b on the rear side and the nozzle 5b or a separate place. In this case, the lifting operation portions of the pair of lifting cylinders 8 on the front side in the transport direction and the tips of the tilting movement rods 14b of the tilting cylinders 14 on the rear side are located below the transport track 3 of the tundish car 2.

In the above example, the tundish 1 is tilted rearward in the traveling direction of the tundish car 2. However, when the tundish 1 is tilted forward in the traveling direction, conversely to the above, the tilting cylinder 13 on the front side is not operated. By keeping the descending state and extending the tilting cylinder 14 on the rear side, the tundish 1 is tilted to the front side with the tip of the lifting cylinder 8 on the front side as a fulcrum. Also in this case, the tilting of the tundish 1 is maintained by the three-point support of the front lifting cylinder 8 and the rear tilting cylinder 14.

The tilting angle is determined by the lifting stroke of the tilting motion rods 13b and 14b of the tilting cylinders 13 and 14 with respect to the lifting cylinder, and is about 20 ° in the embodiment. Each engaging pin 10a, 10b at the bottom of the tundish
And 18a and 18b are semi-circular or V-shaped engaging groove 1
The tundish 1 does not slide down to the tilt side due to the tilting because it fits in the 2a, 12b and 17a, 17b.

The molten steel and the slag may be discharged by tilting only one of the tundish 1 in the longitudinal direction, but by tilting the tundish 1 to the other side and further tilting it to the other side, more reliable waste can be discharged. Become. After the molten steel is discharged, the tilting cylinder 13 or 14 which tilts and supports the tundish 1 is lowered to the original horizontal rising state, and from this posture, the lifting cylinder 8 or 9 and the tilting cylinder 13 or 14 are lowered at the same time. Place the tundish 1 on the tundish car 2. As described above, both the tilting and ascending / descending cylinders do not interfere with the tundish car 2 in the maximum descending state, and the tundish 1 and the tundish car 2 do not interfere with the track 3
You can drive over.

In the above example, the tilting cylinders 13 and 14 are lifted more than the lifting cylinders 8 and 9 to raise and lower the lifting cylinder 8.
Alternatively, although the upper end of 9 is tilted about the fulcrum, the ascending stroke of the lifting cylinders 8 and 9 is reversed.
Alternatively, the tundish 1 may be tilted with the upper end of the tilting cylinder 13 or 14 as a fulcrum. FIG. 5 shows the forward tilting state in this case. The lifting cylinder 9 in the rear part and the tilting cylinder 13 in the front part are raised horizontally to some extent, and then the position of the front tilting cylinder 13 is changed. While keeping the state as it is, the lifting cylinder 9 at the rear part is raised until the predetermined tilt angle is obtained, and the tundish 1 is tilted forward. in this case,
As the rear elevating cylinder 9 rises, the front tilting cylinder 13 rotates about a pivot point 19 in the middle of the cylinder body 13a. In this case, another stopper 2 is provided near the upper side of the cylinder body 13a in order to prevent the tilt cylinder 13 from excessively tilting beyond the spring force of the tension spring 20.
It is better to install 2 additionally. Similarly, when tilting backward, the front lifting cylinder can be raised and the rear tilting cylinder can be tilted.

Although the above-mentioned embodiments are examples in which the lifting cylinder and the tilting cylinder are provided in the front and rear parts, the present invention is not limited to such a form, and for example, a pair of lateral lifting and lowering parts is provided in the front part. Only the cylinder 8 is provided, and only one tilting cylinder 14 is provided at the center in the width direction of the rear part. After the tundish 1 is raised to a certain position by both the lifting and tilting cylinders, either the front part or the rear part is provided. The tundish 1 may be tilted by further raising the cylinder. In addition, a pair of horizontal lifting cylinders 9 are provided at the rear.
Only one tilting cylinder 13 may be provided in the front part. Further, a structure in which a pair of laterally tilting cylinders is provided on either the front part or the rear part and only one lifting cylinder is provided on the rear part or the front part may be provided correspondingly. In this case, the tilting cylinder is supported at three points, that is, two points at the upper end and one point at the upper end of the lifting cylinder.

The engagement grooves formed at the tip of each cylinder 8, 9, 13, 14 are used as engagement pins, and the engagement pins 10a, 10b, 18 provided at the bottom of the tundish 1 are used.
You may use a and 18b as an engaging groove. In short, in the present invention, the bottom of the tundish 1 and the cylinders 8, 9, 1
Can be engaged with the tips of 3, 14 in an uneven state, and moreover,
Any shape may be used as long as the engaging portion can relatively rotate within a certain angle range. Therefore, the engaging portion on the side of each cylinder 8, 9, 13, 14 is referred to as an engaging support portion, and the bottom portion side of the tundish 1 is referred to as an engaging portion.

The above embodiment is an example of a tundish mounted on a tundish car, but it is also applicable to a tundish turret type.
In this case, an elevating and tilting unit is provided on the turning path of the tundish turret so as not to hinder the turning movement of the turret.

[0025]

As described above, according to the present invention, it is not necessary to carry the tundish after pouring it to another place deviated from the normal transportation track to perform the residual steel treatment, and to directly carry it on the transportation track. It can be slagged, the tundish car itself can be conventional, and it can be installed without major modification to the existing track, which simplifies the equipment and streamlines slag disposal. Since the tundish can be tilted to both sides in the longitudinal direction with a simple cylinder operation, it is possible to reliably discharge residual steel, slag, and impurities, and there is no need to remove the pouring nozzle when removing slag, and there are two pouring nozzles. It can also be applied to a continuous casting machine for two strands. When not in use, the lifting and tilting cylinders retract to the bottom of the track, so there is no hindrance to passing the tundish car other than slag disposal. It is easy and safe to transfer the tundish between the lifting and tilting cylinder and the tundish car.
It has many effects.

[Brief description of drawings]

FIG. 1 is a side view of a tundish car and a tundish at the time of normal traveling on a transportation track in which a tundish tilting device according to the present invention is installed.

FIG. 2 is a side sectional view showing a tundish tilting device according to an embodiment of the present invention in a state during a tundish tilting operation.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan sectional view taken along the line BB of FIG.

FIG. 5 is a view showing another tilting operation example of the tundish tilting device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tundish 1a, 1b Overflow outlet 2 Tundish car 3 Transport track 4a, 4b Remaining steel receiving pot 5a, 5b Pouring nozzle 7 Support frame 8, 9 Elevating cylinder 8a, 9a Elevating working part 10a, 10b Engaging pin 12a, 12b Engagement groove 13,14 Tilt cylinder 13b, 14b Tilt motion rod 17a, 17b Engagement groove 18a, 18b Engagement pin 20 Tension spring 21 Stopper

Claims (3)

[Claims] 1. A tundish car equipped with a tundish is transported in the longitudinal direction of the tundish, the tundish car is stopped at the position of the residual steel slag on the transport track, and the entire tundish is stopped at the stop position. A process of pushing up from the orbital side to float from the tundish car, a process of changing the rising stroke of the front and rear parts of the tundish so that the floating tundish has a height difference in the front and rear parts in the longitudinal direction, and And a step of discharging residual steel from a low position side, the method for discharging residual steel in a tundish of a continuous casting facility. 2. An elevating unit and a tilting unit are provided on a track installation side along a tundish transportation track, and an engaging portion provided at a longitudinal front and rear portion of the tundish at an upper end of a telescopic operation section of each unit. A tundish tilting device for continuous casting equipment, characterized in that an engaging support part for engaging is formed, and the expansion / contraction operation part can be retracted to a position that does not hinder the passage of the tundish in the transport track. . 3. The elevating unit is composed of four elevating cylinders provided on the track installation side so as to correspond to two longitudinal front and rear portions of the tundish at the slag position, and the tilting unit includes 3. The tundish tilting device for continuous casting equipment according to claim 2, wherein the tundish tilting device comprises two tilting cylinders, one tilting cylinder disposed between the lifting cylinders at the front and rear portions.