JPS6163345A - Belt type continuous casting device for metallic plate - Google Patents

Abstract

PURPOSE:To cast continuously and safely a thick slab at a high speed by using endless belts which are made of an elastic material and move in contact with said belts at the same speed to constitute the closed members on both sides of the endless traveling device in a belt type continuous casting device for the metallic belt. CONSTITUTION:A molten steel is poured into the space 1 constituted of a pair of the endless belts 2, 2 for casting and the side blocks disposed to the parts of both side faces thereof in the belt type continuous casting device. The molten steel is water- cooled to solidify by cooling water nozzles 7 by which the steel slab is produced. The side blocks in such a case are constituted of a pair of the endless belts 12 which are made of the same material as the material of the belts 2, have many rigs 13 on the rear side and are provided with elastic and flexible members 14 made of synthetic rubber, etc. in the part in contact with the belts 2. Cooling water passages are formed between said blocks and the ribs 13. Since the casting space is constituted of two pairs of the endless belts 2, 2 and 12, 12 moving at the same speed, the continuous casting at a high speed is made possible without inducing the injury of both belts as a result of sliding between the belts and without defects such as leakage of the molten steel and breakout of the slab.

Description

DETAILED DESCRIPTION OF THE INVENTION (Objective of the Invention) (1) Field of Industrial Application The present invention relates to an improvement of a belt type continuous metal plate casting apparatus.

(2) Prior art Figures 3 and 4 show an example of the prior art of a belt-type continuous metal plate casting apparatus. In Figure 3, 2j2 is a pair of endless belts; ,2 is 1-2
It is formed into an endless shape with a steel plate having a thickness of I+l1lI (the width is appropriately set according to the width of the metal plate (slab) to be cast), and is stretched around a plurality of (three in the illustrated example) pulleys 3. It is suspended. 4 is a tundish for temporarily storing molten steel, 5 is a nozzle of the tundish 4, and 6 is arranged at equal intervals along the vertical direction on each rear surface of the opposing vertical surfaces of the pair of endless belts 2, 2. There are a plurality of pairs (six pairs in the illustrated example) of backup rolls, and these backup rolls 6 are used to control the molten steel pressure between the endless belts 2 facing each other (the endless belts 20
Since there is molten steel injected from the nozzle 5 of the tundish 4 between them, a static pressure corresponding to the height of the molten steel is applied to the endless belts 2 facing each other. ). Reference numeral 7 designates a plurality of pairs (five pairs in the illustrated example) of spray nozzles arranged between the backup rolls 6 as shown, and these spray nozzles 7 are connected to a cooling water source (not shown), and the endless belt 2 back (F:, spray 8
thereby cooling the belt 2 and indirectly cooling the molten steel,
The molten steel is solidified to form a slab 1.

Note that 3' is a pinch roll for drawing out the slab. In FIG. 2, reference numerals 9 and 9 denote endless belts 2 and 20 that are opposite to each other, and extend between both ends of the endless belts 2 and 20, over the entire length of the opposing surfaces of the endless belts 2 and 20,
A pair of site 9 locks (blocking members) fixedly installed so as to be able to slide relative to the endless belts 2, 2, and the inner surfaces of the pair of side blocks 9, 9 and the pair of opposite endless belts Molten steel in a space (mold) K surrounded by belts 2 and 2 and a tundish 4 is continuously injected through a nozzle 5, and the molten steel injected into the space is discharged from a spray nozzle 7. is indirectly cooled by the spray 8 through the endless belt 2 to form a solidified shell,
Finally, it becomes slab 1, and pinch roll 3' for drawing
It is pulled out at a predetermined speed.

Reference numeral 10 denotes cooling water passages provided in the side blocks 9, and the cooling water flowing through the passages 10 cools the side blocks 9 and cools and solidifies the sides of the indirectly cast slab 1. There is. Reference numeral 11 denotes a presser block that has the role of pressing both ends of the endless belts 2, 20 against the side block 9. Both ends are slidably pressed against the side block 9.Then, the pulley 3 is rotated in the direction of the arrow (Fig. 1) in accordance with the pouring of molten metal 1 from the tundish 4. The belts 2, 2 are run synchronously, and the poured molten steel is poured from the spray nozzle 7 into a space (mold) surrounded by a pair of endless belts 2, 2 facing each other and a pair of side blocks 9, 9. The molten steel is indirectly cooled and solidified by the spray 8 to continuously cast the thin slab 1. In the figure, 1' indicates the upper surface of the molten steel in the mold, that is, the meniscus.

In the above-mentioned conventional bolt-type continuous metal plate casting equipment, chi This is because the pair of side blocks 9, 9 are fixed.

The following drawbacks arise.

(i) The side block is damaged by pouring hot water into the gap between the endless belt and the side block.

(11) When the Paris adheres to the side block, the surface of the slab is broken by the Paris, causing a breakout phenomenon of the slab.

611) As the casting speed increases, the sliding resistance between the slab and the site 9 block increases, causing breakout.
There is a limit to casting speed.

(3) Problems to be Solved by the Invention The present invention aims to overcome the drawbacks of the above-mentioned conventional techniques and to realize a belt-type continuous metal plate casting apparatus capable of high-speed casting of thick plate slabs. This is the problem that they are trying to solve.

(Structure of the Invention) (1) Means for Solving the Problems The present invention is directed to a plurality of vertical pulleys that are suspended over a plurality of pulleys, driven in a predetermined direction at a predetermined speed by a drive source, and that are A pair of endless belts having surfaces, and a pair of closing members that are elastically pressed against both ends of opposing vertical surfaces of the same pair of endless belts and close both sides of the opposing vertical surfaces. (In the route type continuous metal plate casting apparatus, the pair of closing members are
To solve one problem, the configuration of a belt-type metal plate continuous casting apparatus is characterized in that it is composed of a pair of endless belts driven in the same direction synchronously with the pair of endless belts by a driving source. It is used as a means.

(2) Effect The gist of the device of the present invention is the above configuration.

A closing member that closes both ends of opposing vertical surfaces of a pair of endless belts is formed of a pair of endless belts, and the pair of endless belts moves in the same direction synchronously with the other pair of endless belts. Since it is driven, no sliding phenomenon occurs between the slab and the pair of endless belts forming the closing member, unlike in the conventional example. Furthermore, even if a hot water drop occurs at the contact area between two endless belts, the hot water can be pulled out as it is.

(3) Examples Hereinafter, the examples shown in FIGS. 1 and 2 will demonstrate the present invention.
I will explain it in detail. In the present invention, the structure and operation of the members are the same as in the conventional example, except that a pair of ribbed endless belts 12 are used in place of the pair of side blocks 9, 9 of the conventional belt type continuous metal plate casting apparatus. Things and all (because they are the same,
Descriptions of these members will be omitted.

FIG. 1 ((In the figure, 12 is an endless belt with ribs, and the same endless bell.) On the back side of 12, both ends of ribs 13 are placed at equal intervals.
Cooling water circulation grooves 16 are formed between the back surface of the endless belt 12 and the ribs 13 which are bonded together.

(See FIG. 2) The endless belt 12 is stretched over upper and lower ends of a roll 15 to form an endless belt. (However, only the bottom end is shown in the figure.

Further, the endless belt 12 is made of a material having the same material and thickness as the endless belt 2, and its width and the length of the upper and lower vertical planes are set to be the same dimensions as the side blocks 9. A desired mold is formed in a space surrounded by the vertical surfaces of the pair of endless belts 12 and the vertical surfaces of the pair of opposing endless belts 2. 14
is a flexible membrane made of materials such as synthetic rubber and heat-resistant plastic.

The flexible film 14 includes both end surfaces of the endless belt 120 and the ribs 1.
It is glued to both end faces of 3. (However, in the figure, only the - side end surface is shown.) This flexible film 14 is attached to the endless belt 1.
Cooling water is sprayed onto the back side of the mold side (
It has the role of preventing infiltration into the molten steel (molten steel side).

The pair of ribbed endless belts 12 configured as described above are driven by a drive source (not shown), and run in the same direction synchronously with the pair of endless belts 2 while being guided by guide rolls 15. , both ends of the opposing vertical surfaces of the pair of endless belts 12 are pressed against both ends of the opposing vertical surfaces of the pair of endless belts 2 by presser blocks 11, and a gap is formed between the opposing vertical surfaces. It is designed to form a mold.

One embodiment of the device of the present invention is configured as described above, and when the device starts operating, the pair of endless belts 2 and the pair of endless belts 12 run synchronously in the same direction. At the same time, molten steel is continuously supplied from the nozzle 5 of the tundish 4 into the mold formed between the opposing vertical surfaces of the endless belts 2 and 12. The molten steel is indirectly cooled by spray from a spray nozzle to form a solidified shell, and finally becomes a slab 1 and is pulled out at a predetermined speed by a drawing pinch roll 3'. In this case, the pair of endless belts 12 are the pair of endless belts 2
Since they move synchronously and in the same direction, no sliding phenomenon occurs between the pair of endless belts 12 and the slab 1. Therefore, damage to the endless belt 12 and breakout of the slab do not occur. Moreover, even if the endless belt 2 and the endless belt 12
Even if a hot water splash occurs at the contact portion of the belt, the belt is pulled out together with the endless belt 12 while remaining as it is. Furthermore, the ribs 13 attached to the back surface of the endless belt 12 provide sufficient compressive strength to the endless belt 12, so that the dimensional accuracy of the mold is ensured. Furthermore, since the endless belt 12 has the flexible membrane 14, there is no fear that cooling water will enter the mold side.

・1. (Effects of the Invention) Since the apparatus of the present invention has the above-mentioned configuration and operation, the present invention eliminates all the drawbacks of the above-mentioned conventional techniques and enables high-speed casting of thick plate slabs. The present invention has the practical effect of realizing a belt-type continuous metal plate casting apparatus.

[Brief explanation of drawings]

1 and 2 are schematic illustrations of essential parts of an embodiment of the present invention, with FIG. 1 being a partial perspective view, FIG. 2 being a partially enlarged view of FIG. 1, and FIG. 3 being a partially enlarged view of FIG. and FIG. 4 are schematic explanatory diagrams of the conventional example,
3 is a vertical cross-sectional view perpendicular to the long side of the slab, and FIG. 4 is a view taken along the line FF in FIG. 3. 1: Slab, 2, 2, a pair of endless belts, 3: Pulley, 4: Tanditshu, 5
: Nozzle, 6: Backup roll, 7:
Spray nozzle, 8 nis spray, 11: presser block, 12 pair of endless belts, 13: ribs,
14: Flexibility, model, 15 guide, 90-rule. Figure 3 Figure 4

Claims (1)

[Claims] A pair of endless belts that are stretched over a plurality of pulleys, driven by a drive source in a predetermined direction at a predetermined speed, and have vertical surfaces of a predetermined length that face each other, and both sides of the opposite vertical faces of the same pair of endless belts. In a belt-type metal sheet continuous casting apparatus comprising a pair of closing members that are elastically pressed against the ends and close both sides of the opposing vertical surfaces, the pair of closing members are driven by a drive source to close the pair of endless closing members. A belt-type continuous metal sheet casting apparatus characterized by being composed of a pair of endless belts that are driven in the same direction in synchronization with a belt.