JPS59113959A - Belt type continuous casting machine - Google Patents

Abstract

PURPOSE:To prevent easily the formation of fins on the surface of a continuous casting billet by attaching magnets to the side blocks to be inserted between both ends of a pair of steel belts for casting in a belt type continuous casting machine to prevent contact with a molten steel. CONSTITUTION:Endless steel belts 2, 2' for continuous casting in a belt type continuous casting machine are run at a specified speed and a molten metal is charged into the spacing between said belts. The molten metal is cooled by the cooling sprays 8 of spray nozzles 7 from the outside of the belts 2, 2' whereby the molten steel is solidified and cast continuously. Side blocks 9a are inserted into spacings between both ends of such belts 2, 2' to prevent leakage of the molten steel and are pressed by press blocks 10 to eliminate the clearance from the belts, thereby preventing leakage of the molten steel. Magnets 11 are provided to the blocks 9a to avoid contact with the molten steel, whereby the leakage of the molten steel from the spacing between the belts and the side blocks 9a hence the formation of fins on a continuous casting billet are prevented without increasing the pressing force of the blocks 10.

Description

[Detailed description of the invention] The present invention relates to improvements in belt-type continuous casting machines.

A conventional belt-type continuous casting machine is usually constructed as shown in FIGS. 1 to 3. In those figures, 2.2' is a pair of steel (
4 is a tandish, 5 is its nozzle, 6 is a backup roll that supports the pressure of molten steel on the opposing running surface 2a12''a of the endless belt 2.2, 7 is a cooling spray 8
A spray nozzle 9.9' is inserted between the opposite ends of the running surface 2a12'a of the endless bell 2.2' to cool it by spraying it onto the back surface of the belt 2.2'. , as shown in FIG. 6, is stretched in an endless manner on the guide roll 12 (however, only one is shown in FIG. 3), and is synchronously moved with the above-mentioned bell) 2.2' by a drive source (not shown). A pair of side blocks moving in the same direction, and a slab 1 is placed in a space surrounded by opposing running surfaces 2al 2/a of the side blocks 9.9' and belt 2.2'.
is starting to form. 10.10' are presser blocks arranged as shown in FIG. 2, and these presser blocks 10.10' are opposite running surfaces 2a of a pair of endless bells 2.2'.

Both end portions of 2'a are pressed against the side blocks 9 and 9' to prevent a gap from forming between them. In the above-mentioned conventional belt type continuous casting machine, the site 9 nozzle 9.9' and the belts 2, 2' are in contact with each other due to the action of the presser block 10, 10' while they move synchronously. During operation, the molten steel is spread out by the pressure of the molten steel, and the molten steel flows into the gap between the bell) 2.2' and the side block 9.9', causing so-called paris. Both ends of the slab 1 are restrained by this paris, and when the slab 1 contracts as the temperature drops, cracks occur on the slab surface, resulting in a quality defect.

In order to solve this problem, presser block 10.10
If the pressing force of ' is too strong (then the friction between the belt 2°2' and the presser block 10.10' (the presser foot lock 10°10' does not move) will increase, the belt driving force will increase, and the belt This is undesirable because it causes wear and tear.

The present invention was proposed for the purpose of providing a belt-type continuous casting machine that can solve the above-mentioned problems of the conventional belt-type continuous casting machine without increasing the pressing force of the presser block. A pair of steel belts are stretched in an endless manner and run in a predetermined direction at a predetermined speed, and the belts are inserted between opposite ends of the running surfaces of the endless belts, and are driven in the same direction synchronously with the belts by a driving means. In a belt-type continuous casting machine equipped with a side block that moves to the side block and a presser block that presses the belt toward the side block, a magnet for attracting the belt is attached to a part of the side block so as not to come into contact with the molten steel. This relates to a belt-type continuous casting machine that is characterized by being embedded.

Hereinafter, the present invention will be specifically explained with reference to embodiments shown in FIGS. 4 and 5.

In FIG. 4, 2a and 2'a are a pair of endless belts 2.
2' is the opposing running surface, 9a is the running surface 2a+2
A side block 9a is inserted between the inner surfaces of both ends of the side block 9a (however, only one end is shown in the figure), and a magnet 11 is embedded in the side block 9a as shown in FIG. The magnet is, for example, a ferrite magnet or a rare earth magnet, and is embedded in the molten steel so that it does not come into direct contact with the molten steel, as shown in FIG. In the figure, reference numeral 10 denotes a presser block similar to the conventional one, or in the case of the present invention, the same presser effect can be achieved even if the pressing force is somewhat reduced. Further, although not shown in the drawings, the configuration of other parts is entirely (same) as the conventional belt-type continuous casting machine described above.

As described above, the belt-type continuous casting machine of the present invention is characterized in that a magnet for attracting the belt is embedded in the side block of the conventionally known belt-type continuous casting machine so as not to come into contact with molten steel. It is.

One embodiment of the belt-type continuous casting machine of the present invention is configured as described above, and when the machine starts operating, a thin plate-shaped slab is
It is the same as in the conventional machine that is continuously cast, but in the case of the present invention, since the side block 9a is embedded with magnets 11, both ends of the steel bell) 2.2' are attracted. Since the belt 2.2' moves in synchronization with the belt 2.2' without creating a gap in the state, the pressing force of the presser block 10 can be reduced somewhat without increasing the pressing force of the presser block 10. There is no possibility that molten steel will enter between the both end portions of the side block 9a and the side block 9a, resulting in the formation of cracks.

Note that when a ferrite magnet is used as the magnet 11,
up to 500℃, or 25℃ when using rare earth magnets.
Although it can be used up to 0° C., if necessary, the side block 9a may be cooled by an appropriate cooling means.

Since the bolt-type continuous casting machine of the present invention has the above-described configuration and function, the present invention can solve the above-mentioned problems of the conventional machine without increasing the pressing force of the presser block. (
This allows casting operations to be carried out without causing cracks, which not only yields high-quality cast slabs free of defects such as surface cracks, but also achieves the same effect even if the pressing force of the presser block 9a is slightly reduced. This can be expected to reduce the friction between the belt and the presser block, thus saving the belt driving force.
This also has the practical effect of reducing root wear and improving durability.

[Brief explanation of the drawing]

1 to 6 are schematic explanatory diagrams of a conventional example, in which FIG. 1 is a side view, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 6 is a side block arrangement. 4 and 5 are schematic explanatory views of one embodiment of the present invention, with FIG. 4 being a cross-sectional view of a main part, and FIG. 5 being a perspective view of a side block. 2.2': Hert, 9a: Site 8 Norotsk. 10: Presser block. (2 others)

Claims (1)

[Claims] A pair of steel belts are endlessly stretched around a drive pulley and run in a predetermined direction at a predetermined speed.The endless steel belts are inserted between both ends of the opposing running surfaces of the belt, and are driven in the same direction as the belts by a driving means. side blocks that move in the same direction,
A belt-type continuous casting machine comprising a presser block that presses the belt toward the side block, characterized in that a magnet for attracting the belt is embedded in a part of the side block so as not to come into contact with the molten steel.・Belt type continuous casting machine.